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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org. If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
+#include <vcl/opengl/OpenGLHelper.hxx>
+#include <vcl/opengl/OpenGLContext.hxx>
+#include <sal/log.hxx>
+
+#include <algorithm>
+#include <array>
+
+#include <comphelper/random.hxx>
+
+#include "Operation.hxx"
+#include "TransitionImpl.hxx"
+#include <cmath>
+
+TransitionScene::TransitionScene(TransitionScene const& rOther)
+ : maLeavingSlidePrimitives(rOther.maLeavingSlidePrimitives)
+ , maEnteringSlidePrimitives(rOther.maEnteringSlidePrimitives)
+ , maOverallOperations(rOther.maOverallOperations)
+ , maSceneObjects(rOther.maSceneObjects)
+{
+}
+
+TransitionScene& TransitionScene::operator=(const TransitionScene& rOther)
+{
+ TransitionScene aTmp(rOther);
+ swap(aTmp);
+ return *this;
+}
+
+void TransitionScene::swap(TransitionScene& rOther)
+{
+ using std::swap;
+
+ swap(maLeavingSlidePrimitives, rOther.maLeavingSlidePrimitives);
+ swap(maEnteringSlidePrimitives, rOther.maEnteringSlidePrimitives);
+ swap(maOverallOperations, rOther.maOverallOperations);
+ swap(maSceneObjects, rOther.maSceneObjects);
+}
+
+OGLTransitionImpl::~OGLTransitionImpl()
+{
+}
+
+void OGLTransitionImpl::uploadModelViewProjectionMatrices()
+{
+ double EyePos(10.0);
+ double const RealF(1.0);
+ double const RealN(-1.0);
+ double const RealL(-1.0);
+ double RealR(1.0);
+ double const RealB(-1.0);
+ double RealT(1.0);
+ double ClipN(EyePos+5.0*RealN);
+ double ClipF(EyePos+15.0*RealF);
+ double ClipL(RealL*8.0);
+ double ClipR(RealR*8.0);
+ double ClipB(RealB*8.0);
+ double ClipT(RealT*8.0);
+
+ glm::mat4 projection = glm::frustum<float>(ClipL, ClipR, ClipB, ClipT, ClipN, ClipF);
+ //This scaling is to take the plane with BottomLeftCorner(-1,-1,0) and TopRightCorner(1,1,0) and map it to the screen after the perspective division.
+ glm::vec3 scale(1.0 / (((RealR * 2.0 * ClipN) / (EyePos * (ClipR - ClipL))) - ((ClipR + ClipL) / (ClipR - ClipL))),
+ 1.0 / (((RealT * 2.0 * ClipN) / (EyePos * (ClipT - ClipB))) - ((ClipT + ClipB) / (ClipT - ClipB))),
+ 1.0);
+ projection = glm::scale(projection, scale);
+ glm::mat4 modelview = glm::translate(glm::mat4(), glm::vec3(0, 0, -EyePos));
+
+ GLint location = glGetUniformLocation( m_nProgramObject, "u_projectionMatrix" );
+ if( location != -1 ) {
+ glUniformMatrix4fv(location, 1, false, glm::value_ptr(projection));
+ CHECK_GL_ERROR();
+ }
+
+ location = glGetUniformLocation( m_nProgramObject, "u_modelViewMatrix" );
+ if( location != -1 ) {
+ glUniformMatrix4fv(location, 1, false, glm::value_ptr(modelview));
+ CHECK_GL_ERROR();
+ }
+}
+
+static std::vector<int> uploadPrimitives(const Primitives_t& primitives)
+{
+ int size = 0;
+ for (const Primitive& primitive: primitives)
+ size += primitive.getVerticesByteSize();
+
+ CHECK_GL_ERROR();
+ glBufferData(GL_ARRAY_BUFFER, size, nullptr, GL_STATIC_DRAW);
+ CHECK_GL_ERROR();
+ Vertex *buf = static_cast<Vertex*>(glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY));
+
+ std::vector<int> indices;
+ int last_pos = 0;
+ for (const Primitive& primitive: primitives) {
+ indices.push_back(last_pos);
+ int num = primitive.writeVertices(buf);
+ buf += num;
+ last_pos += num;
+ }
+
+ CHECK_GL_ERROR();
+ glUnmapBuffer(GL_ARRAY_BUFFER);
+ CHECK_GL_ERROR();
+ return indices;
+}
+
+bool OGLTransitionImpl::prepare( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext )
+{
+ m_nProgramObject = makeShader();
+ if (!m_nProgramObject)
+ return false;
+
+ CHECK_GL_ERROR();
+ glUseProgram( m_nProgramObject );
+ CHECK_GL_ERROR();
+
+ const SceneObjects_t& rSceneObjects(maScene.getSceneObjects());
+ for(size_t i(0); i != rSceneObjects.size(); ++i) {
+ rSceneObjects[i]->prepare(m_nProgramObject);
+ }
+
+ GLint location = glGetUniformLocation( m_nProgramObject, "leavingSlideTexture" );
+ if( location != -1 ) {
+ glUniform1i( location, 0 ); // texture unit 0
+ CHECK_GL_ERROR();
+ }
+
+ location = glGetUniformLocation( m_nProgramObject, "enteringSlideTexture" );
+ if( location != -1 ) {
+ glUniform1i( location, 2 ); // texture unit 2
+ CHECK_GL_ERROR();
+ }
+
+ uploadModelViewProjectionMatrices();
+
+ m_nPrimitiveTransformLocation = glGetUniformLocation( m_nProgramObject, "u_primitiveTransformMatrix" );
+ m_nSceneTransformLocation = glGetUniformLocation( m_nProgramObject, "u_sceneTransformMatrix" );
+ m_nOperationsTransformLocation = glGetUniformLocation( m_nProgramObject, "u_operationsTransformMatrix" );
+ m_nTimeLocation = glGetUniformLocation( m_nProgramObject, "time" );
+
+ glGenVertexArrays(1, &m_nVertexArrayObject);
+ glBindVertexArray(m_nVertexArrayObject);
+
+ glGenBuffers(1, &m_nVertexBufferObject);
+ glBindBuffer(GL_ARRAY_BUFFER, m_nVertexBufferObject);
+
+ // In practice both leaving and entering slides share the same primitives.
+ m_nFirstIndices = uploadPrimitives(getScene().getLeavingSlide());
+
+ // Attribute bindings
+ m_nPositionLocation = glGetAttribLocation(m_nProgramObject, "a_position");
+ if (m_nPositionLocation != -1) {
+ glEnableVertexAttribArray(m_nPositionLocation);
+ glVertexAttribPointer( m_nPositionLocation, 3, GL_FLOAT, false, sizeof(Vertex), reinterpret_cast<void*>(offsetof(Vertex, position)) );
+ CHECK_GL_ERROR();
+ }
+
+ m_nNormalLocation = glGetAttribLocation(m_nProgramObject, "a_normal");
+ if (m_nNormalLocation != -1) {
+ glEnableVertexAttribArray(m_nNormalLocation);
+ glVertexAttribPointer( m_nNormalLocation, 3, GL_FLOAT, false, sizeof(Vertex), reinterpret_cast<void*>(offsetof(Vertex, normal)) );
+ CHECK_GL_ERROR();
+ }
+
+ m_nTexCoordLocation = glGetAttribLocation(m_nProgramObject, "a_texCoord");
+ if (m_nTexCoordLocation != -1) {
+ glEnableVertexAttribArray(m_nTexCoordLocation);
+ glVertexAttribPointer( m_nTexCoordLocation, 2, GL_FLOAT, false, sizeof(Vertex), reinterpret_cast<void*>(offsetof(Vertex, texcoord)) );
+ CHECK_GL_ERROR();
+ }
+
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ CHECK_GL_ERROR();
+
+ prepareTransition( glLeavingSlideTex, glEnteringSlideTex, pContext );
+ return true;
+}
+
+void OGLTransitionImpl::finish()
+{
+ const SceneObjects_t& rSceneObjects(maScene.getSceneObjects());
+ for(size_t i(0); i != rSceneObjects.size(); ++i) {
+ rSceneObjects[i]->finish();
+ }
+
+ finishTransition();
+
+ CHECK_GL_ERROR();
+ if( m_nProgramObject ) {
+ glDeleteBuffers(1, &m_nVertexBufferObject);
+ m_nVertexBufferObject = 0;
+ glDeleteVertexArrays(1, &m_nVertexArrayObject);
+ m_nVertexArrayObject = 0;
+ glDeleteProgram( m_nProgramObject );
+ m_nProgramObject = 0;
+ }
+ CHECK_GL_ERROR();
+}
+
+void OGLTransitionImpl::prepare( double, double )
+{
+}
+
+void OGLTransitionImpl::cleanup()
+{
+}
+
+void OGLTransitionImpl::prepareTransition( sal_Int32, sal_Int32, OpenGLContext* )
+{
+}
+
+void OGLTransitionImpl::finishTransition()
+{
+}
+
+void OGLTransitionImpl::displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext * )
+{
+ CHECK_GL_ERROR();
+ applyOverallOperations( nTime, SlideWidthScale, SlideHeightScale );
+
+ glUniform1f( m_nTimeLocation, nTime );
+
+ glActiveTexture( GL_TEXTURE2 );
+ glBindTexture( GL_TEXTURE_2D, glEnteringSlideTex );
+ glActiveTexture( GL_TEXTURE0 );
+
+ displaySlide( nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale );
+ CHECK_GL_ERROR();
+}
+
+void OGLTransitionImpl::display( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex,
+ double SlideWidth, double SlideHeight, double DispWidth, double DispHeight, OpenGLContext *pContext )
+{
+ const double SlideWidthScale = SlideWidth/DispWidth;
+ const double SlideHeightScale = SlideHeight/DispHeight;
+
+ CHECK_GL_ERROR();
+ glBindVertexArray(m_nVertexArrayObject);
+ prepare( SlideWidth, SlideHeight );
+
+ CHECK_GL_ERROR();
+ displaySlides_( nTime, glLeavingSlideTex, glEnteringSlideTex, SlideWidthScale, SlideHeightScale, pContext );
+ CHECK_GL_ERROR();
+ displayScene( nTime, SlideWidth, SlideHeight, DispWidth, DispHeight );
+ CHECK_GL_ERROR();
+}
+
+void OGLTransitionImpl::applyOverallOperations( double nTime, double SlideWidthScale, double SlideHeightScale )
+{
+ const Operations_t& rOverallOperations(maScene.getOperations());
+ glm::mat4 matrix;
+ for(size_t i(0); i != rOverallOperations.size(); ++i)
+ rOverallOperations[i]->interpolate(matrix, nTime, SlideWidthScale, SlideHeightScale);
+ CHECK_GL_ERROR();
+ if (m_nOperationsTransformLocation != -1) {
+ glUniformMatrix4fv(m_nOperationsTransformLocation, 1, false, glm::value_ptr(matrix));
+ CHECK_GL_ERROR();
+ }
+}
+
+static void displayPrimitives(const Primitives_t& primitives, GLint primitiveTransformLocation, double nTime, double WidthScale, double HeightScale, std::vector<int>::const_iterator first)
+{
+ for (const Primitive& primitive: primitives)
+ primitive.display(primitiveTransformLocation, nTime, WidthScale, HeightScale, *first++);
+}
+
+void
+OGLTransitionImpl::displaySlide(
+ const double nTime,
+ const sal_Int32 glSlideTex, const Primitives_t& primitives,
+ double SlideWidthScale, double SlideHeightScale )
+{
+ CHECK_GL_ERROR();
+ glBindTexture(GL_TEXTURE_2D, glSlideTex);
+ CHECK_GL_ERROR();
+ if (m_nSceneTransformLocation != -1) {
+ glUniformMatrix4fv(m_nSceneTransformLocation, 1, false, glm::value_ptr(glm::mat4()));
+ CHECK_GL_ERROR();
+ }
+ displayPrimitives(primitives, m_nPrimitiveTransformLocation, nTime, SlideWidthScale, SlideHeightScale, m_nFirstIndices.cbegin());
+ CHECK_GL_ERROR();
+}
+
+void
+OGLTransitionImpl::displayUnbufferedSlide(
+ const double nTime,
+ const sal_Int32 glSlideTex, const Primitives_t& primitives,
+ double SlideWidthScale, double SlideHeightScale )
+{
+ CHECK_GL_ERROR();
+ glBindTexture(GL_TEXTURE_2D, glSlideTex);
+ CHECK_GL_ERROR();
+ glBindVertexArray(0);
+ CHECK_GL_ERROR();
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ CHECK_GL_ERROR();
+ if (m_nSceneTransformLocation != -1) {
+ glUniformMatrix4fv(m_nSceneTransformLocation, 1, false, glm::value_ptr(glm::mat4()));
+ CHECK_GL_ERROR();
+ }
+ for (const Primitive& primitive: primitives)
+ primitive.display(m_nPrimitiveTransformLocation, nTime, SlideWidthScale, SlideHeightScale);
+ CHECK_GL_ERROR();
+ glBindVertexArray(m_nVertexArrayObject);
+ CHECK_GL_ERROR();
+ glBindBuffer(GL_ARRAY_BUFFER, m_nVertexBufferObject);
+ CHECK_GL_ERROR();
+}
+
+void OGLTransitionImpl::displayScene( double nTime, double SlideWidth, double SlideHeight, double DispWidth, double DispHeight )
+{
+ const SceneObjects_t& rSceneObjects(maScene.getSceneObjects());
+ CHECK_GL_ERROR();
+ for(size_t i(0); i != rSceneObjects.size(); ++i)
+ rSceneObjects[i]->display(m_nSceneTransformLocation, m_nPrimitiveTransformLocation, nTime, SlideWidth, SlideHeight, DispWidth, DispHeight);
+ CHECK_GL_ERROR();
+}
+
+void Primitive::display(GLint primitiveTransformLocation, double nTime, double WidthScale, double HeightScale) const
+{
+ glm::mat4 matrix;
+ applyOperations( matrix, nTime, WidthScale, HeightScale );
+
+ CHECK_GL_ERROR();
+ if (primitiveTransformLocation != -1) {
+ glUniformMatrix4fv(primitiveTransformLocation, 1, false, glm::value_ptr(matrix));
+ CHECK_GL_ERROR();
+ }
+
+ GLuint nVertexArrayObject;
+ glGenVertexArrays(1, &nVertexArrayObject);
+ CHECK_GL_ERROR();
+ glBindVertexArray(nVertexArrayObject);
+ CHECK_GL_ERROR();
+
+ GLuint nBuffer;
+ glGenBuffers(1, &nBuffer);
+ CHECK_GL_ERROR();
+ glBindBuffer(GL_ARRAY_BUFFER, nBuffer);
+ CHECK_GL_ERROR();
+ glBufferData(GL_ARRAY_BUFFER, getVerticesByteSize(), Vertices.data(), GL_STATIC_DRAW);
+
+ glEnableVertexAttribArray(0);
+ CHECK_GL_ERROR();
+ glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), nullptr);
+ CHECK_GL_ERROR();
+ glDrawArrays( GL_TRIANGLES, 0, Vertices.size() );
+ CHECK_GL_ERROR();
+
+ glDeleteBuffers(1, &nBuffer);
+ CHECK_GL_ERROR();
+
+ glDeleteVertexArrays(1, &nVertexArrayObject);
+ CHECK_GL_ERROR();
+}
+
+void Primitive::display(GLint primitiveTransformLocation, double nTime, double WidthScale, double HeightScale, int first) const
+{
+ glm::mat4 matrix;
+ applyOperations( matrix, nTime, WidthScale, HeightScale );
+
+ CHECK_GL_ERROR();
+ if (primitiveTransformLocation != -1) {
+ glUniformMatrix4fv(primitiveTransformLocation, 1, false, glm::value_ptr(matrix));
+ CHECK_GL_ERROR();
+ }
+ glDrawArrays( GL_TRIANGLES, first, Vertices.size() );
+
+ CHECK_GL_ERROR();
+}
+
+void Primitive::applyOperations(glm::mat4& matrix, double nTime, double WidthScale, double HeightScale) const
+{
+ for(const auto & rOperation : Operations)
+ rOperation->interpolate(matrix, nTime, WidthScale, HeightScale);
+ matrix = glm::scale(matrix, glm::vec3(WidthScale, HeightScale, 1));
+}
+
+void SceneObject::display(GLint sceneTransformLocation, GLint primitiveTransformLocation, double nTime, double /* SlideWidth */, double /* SlideHeight */, double DispWidth, double DispHeight ) const
+{
+ // fixme: allow various model spaces, now we make it so that
+ // it is regular -1,-1 to 1,1, where the whole display fits in
+ glm::mat4 matrix;
+ if (DispHeight > DispWidth)
+ matrix = glm::scale(matrix, glm::vec3(DispHeight/DispWidth, 1, 1));
+ else
+ matrix = glm::scale(matrix, glm::vec3(1, DispWidth/DispHeight, 1));
+ CHECK_GL_ERROR();
+ if (sceneTransformLocation != -1) {
+ glUniformMatrix4fv(sceneTransformLocation, 1, false, glm::value_ptr(matrix));
+ CHECK_GL_ERROR();
+ }
+ displayPrimitives(maPrimitives, primitiveTransformLocation, nTime, 1, 1, maFirstIndices.cbegin());
+ CHECK_GL_ERROR();
+}
+
+void SceneObject::pushPrimitive(const Primitive &p)
+{
+ maPrimitives.push_back(p);
+}
+
+SceneObject::SceneObject()
+ : maPrimitives()
+{
+}
+
+SceneObject::~SceneObject()
+{
+}
+
+namespace
+{
+
+class Iris : public SceneObject
+{
+public:
+ Iris() = default;
+
+ virtual void prepare(GLuint program) override;
+ virtual void display(GLint sceneTransformLocation, GLint primitiveTransformLocation, double nTime, double SlideWidth, double SlideHeight, double DispWidth, double DispHeight) const override;
+ virtual void finish() override;
+
+private:
+ GLuint maTexture = 0;
+ GLuint maBuffer = 0;
+ GLuint maVertexArray = 0;
+};
+
+void Iris::display(GLint sceneTransformLocation, GLint primitiveTransformLocation, double nTime, double SlideWidth, double SlideHeight, double DispWidth, double DispHeight ) const
+{
+ glBindVertexArray(maVertexArray);
+ CHECK_GL_ERROR();
+ glBindTexture(GL_TEXTURE_2D, maTexture);
+ CHECK_GL_ERROR();
+ SceneObject::display(sceneTransformLocation, primitiveTransformLocation, nTime, SlideWidth, SlideHeight, DispWidth, DispHeight);
+}
+
+void Iris::prepare(GLuint program)
+{
+ CHECK_GL_ERROR();
+ static const GLubyte img[3] = { 80, 80, 80 };
+
+ glGenTextures(1, &maTexture);
+ glBindTexture(GL_TEXTURE_2D, maTexture);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, img);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
+ CHECK_GL_ERROR();
+
+ glGenVertexArrays(1, &maVertexArray);
+ glBindVertexArray(maVertexArray);
+
+ glGenBuffers(1, &maBuffer);
+ glBindBuffer(GL_ARRAY_BUFFER, maBuffer);
+ maFirstIndices = uploadPrimitives(maPrimitives);
+
+ // Attribute bindings
+ GLint location = glGetAttribLocation(program, "a_position");
+ if (location != -1) {
+ glEnableVertexAttribArray(location);
+ glVertexAttribPointer( location, 3, GL_FLOAT, false, sizeof(Vertex), reinterpret_cast<void*>(offsetof(Vertex, position)) );
+ CHECK_GL_ERROR();
+ }
+
+ location = glGetAttribLocation(program, "a_normal");
+ if (location != -1) {
+ glEnableVertexAttribArray(location);
+ glVertexAttribPointer( location, 3, GL_FLOAT, false, sizeof(Vertex), reinterpret_cast<void*>(offsetof(Vertex, normal)) );
+ CHECK_GL_ERROR();
+ }
+
+ location = glGetAttribLocation(program, "a_texCoord");
+ if (location != -1) {
+ glEnableVertexAttribArray(location);
+ glVertexAttribPointer( location, 2, GL_FLOAT, false, sizeof(Vertex), reinterpret_cast<void*>(offsetof(Vertex, texcoord)) );
+ CHECK_GL_ERROR();
+ }
+
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+}
+
+void Iris::finish()
+{
+ CHECK_GL_ERROR();
+ glDeleteBuffers(1, &maBuffer);
+ CHECK_GL_ERROR();
+ glDeleteVertexArrays(1, &maVertexArray);
+ CHECK_GL_ERROR();
+ glDeleteTextures(1, &maTexture);
+ CHECK_GL_ERROR();
+}
+
+}
+
+namespace
+{
+
+class ReflectionTransition : public OGLTransitionImpl
+{
+public:
+ ReflectionTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : OGLTransitionImpl(rScene, rSettings)
+ {}
+
+private:
+ virtual GLuint makeShader() const override;
+ virtual void displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext *pContext ) override;
+
+ virtual void prepareTransition( sal_Int32, sal_Int32, OpenGLContext* ) override {
+ glDisable(GL_CULL_FACE);
+ }
+
+ virtual void finishTransition() override {
+ glEnable(GL_CULL_FACE);
+ }
+};
+
+GLuint ReflectionTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "reflectionVertexShader", "reflectionFragmentShader" );
+}
+
+void ReflectionTransition::displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex,
+ double SlideWidthScale, double SlideHeightScale, OpenGLContext * )
+{
+ CHECK_GL_ERROR();
+ applyOverallOperations( nTime, SlideWidthScale, SlideHeightScale );
+
+ sal_Int32 texture;
+ Primitives_t slide;
+ if (nTime < 0.5) {
+ texture = glLeavingSlideTex;
+ slide = getScene().getLeavingSlide();
+ } else {
+ texture = glEnteringSlideTex;
+ slide = getScene().getEnteringSlide();
+ }
+
+ displaySlide( nTime, texture, slide, SlideWidthScale, SlideHeightScale );
+ CHECK_GL_ERROR();
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeReflectionTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ Operations_t&& rOverallOperations,
+ const TransitionSettings& rSettings)
+{
+ return std::make_shared<ReflectionTransition>(
+ TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives), std::move(rOverallOperations), SceneObjects_t()),
+ rSettings);
+}
+
+}
+
+namespace
+{
+
+class SimpleTransition : public OGLTransitionImpl
+{
+public:
+ SimpleTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : OGLTransitionImpl(rScene, rSettings)
+ {
+ }
+
+private:
+ virtual GLuint makeShader() const override;
+
+ virtual void displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext *pContext ) override;
+};
+
+GLuint SimpleTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "basicVertexShader", "basicFragmentShader" );
+}
+
+void SimpleTransition::displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex,
+ double SlideWidthScale, double SlideHeightScale, OpenGLContext * )
+{
+ CHECK_GL_ERROR();
+ applyOverallOperations( nTime, SlideWidthScale, SlideHeightScale );
+
+ CHECK_GL_ERROR();
+ displaySlide( nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale );
+ displaySlide( nTime, glEnteringSlideTex, getScene().getEnteringSlide(), SlideWidthScale, SlideHeightScale );
+ CHECK_GL_ERROR();
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeSimpleTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ Operations_t&& rOverallOperations,
+ SceneObjects_t&& rSceneObjects,
+ const TransitionSettings& rSettings)
+{
+ return std::make_shared<SimpleTransition>(
+ TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives),
+ std::move(rOverallOperations), std::move(rSceneObjects)),
+ rSettings);
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeSimpleTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ Operations_t&& rOverallOperations,
+ const TransitionSettings& rSettings = TransitionSettings())
+{
+ return makeSimpleTransition(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives),
+ std::move(rOverallOperations), SceneObjects_t(), rSettings);
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeSimpleTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ SceneObjects_t&& rSceneObjects,
+ const TransitionSettings& rSettings)
+{
+ return makeSimpleTransition(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives),
+ Operations_t(), std::move(rSceneObjects), rSettings);
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeSimpleTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings = TransitionSettings())
+{
+ return makeSimpleTransition(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives),
+ Operations_t(), SceneObjects_t(), rSettings);
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeOutsideCubeFaceToLeft()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle(glm::vec2(0,0),glm::vec2(1,0),glm::vec2(0,1));
+ Slide.pushTriangle(glm::vec2(1,0),glm::vec2(0,1),glm::vec2(1,1));
+
+ Primitives_t aLeavingPrimitives;
+ aLeavingPrimitives.push_back(Slide);
+
+ Slide.Operations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0,1,0),glm::vec3(0,0,-1),90,false,false,0.0,1.0));
+
+ Primitives_t aEnteringPrimitives;
+ aEnteringPrimitives.push_back(Slide);
+
+ Operations_t aOperations;
+ aOperations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0,1,0),glm::vec3(0,0,-1),-90,false,true,0.0,1.0));
+
+ return makeSimpleTransition(std::move(aLeavingPrimitives), std::move(aEnteringPrimitives), std::move(aOperations));
+}
+
+std::shared_ptr<OGLTransitionImpl> makeInsideCubeFaceToLeft()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle(glm::vec2(0,0),glm::vec2(1,0),glm::vec2(0,1));
+ Slide.pushTriangle(glm::vec2(1,0),glm::vec2(0,1),glm::vec2(1,1));
+
+ Primitives_t aLeavingPrimitives;
+ aLeavingPrimitives.push_back(Slide);
+
+ Slide.Operations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0,1,0),glm::vec3(0,0,1),-90,false,false,0.0,1.0));
+
+ Primitives_t aEnteringPrimitives;
+ aEnteringPrimitives.push_back(Slide);
+
+ Operations_t aOperations;
+ aOperations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0,1,0),glm::vec3(0,0,1),90,false,true,0.0,1.0));
+
+ return makeSimpleTransition(std::move(aLeavingPrimitives), std::move(aEnteringPrimitives), std::move(aOperations));
+}
+
+std::shared_ptr<OGLTransitionImpl> makeFallLeaving()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle(glm::vec2(0,0),glm::vec2(1,0),glm::vec2(0,1));
+ Slide.pushTriangle(glm::vec2(1,0),glm::vec2(0,1),glm::vec2(1,1));
+
+ Primitives_t aEnteringPrimitives;
+ aEnteringPrimitives.push_back(Slide);
+
+ Slide.Operations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(1,0,0),glm::vec3(0,-1,0), 90,true,true,0.0,1.0));
+ Primitives_t aLeavingPrimitives;
+ aLeavingPrimitives.push_back(Slide);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapEntering = false;
+
+ return makeSimpleTransition(std::move(aLeavingPrimitives), std::move(aEnteringPrimitives), aSettings);
+}
+
+std::shared_ptr<OGLTransitionImpl> makeTurnAround()
+{
+ Primitive Slide;
+ TransitionSettings aSettings;
+
+ Slide.pushTriangle(glm::vec2(0,0),glm::vec2(1,0),glm::vec2(0,1));
+ Slide.pushTriangle(glm::vec2(1,0),glm::vec2(0,1),glm::vec2(1,1));
+ Primitives_t aLeavingPrimitives;
+ aLeavingPrimitives.push_back(Slide);
+
+ Slide.Operations.push_back(makeSScale(glm::vec3(1, -1, 1), glm::vec3(0, -1.02, 0), false, -1, 0));
+ aLeavingPrimitives.push_back(Slide);
+
+ Slide.Operations.clear();
+ Slide.Operations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0,1,0),glm::vec3(0,0,0),-180,true,false,0.0,1.0));
+ Primitives_t aEnteringPrimitives;
+ aEnteringPrimitives.push_back(Slide);
+
+ Slide.Operations.push_back(makeSScale(glm::vec3(1, -1, 1), glm::vec3(0, -1.02, 0), false, -1, 0));
+ aEnteringPrimitives.push_back(Slide);
+
+ Operations_t aOperations;
+ aOperations.push_back(makeSTranslate(glm::vec3(0, 0, -1.5),true, 0, 0.5));
+ aOperations.push_back(makeSTranslate(glm::vec3(0, 0, 1.5), true, 0.5, 1));
+ aOperations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0, 1, 0),glm::vec3(0, 0, 0), -180, true, true, 0.0, 1.0));
+
+ return makeReflectionTransition(std::move(aLeavingPrimitives), std::move(aEnteringPrimitives), std::move(aOperations), aSettings);
+}
+
+std::shared_ptr<OGLTransitionImpl> makeTurnDown()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle(glm::vec2(0,0),glm::vec2(1,0),glm::vec2(0,1));
+ Slide.pushTriangle(glm::vec2(1,0),glm::vec2(0,1),glm::vec2(1,1));
+ Primitives_t aLeavingPrimitives;
+ aLeavingPrimitives.push_back(Slide);
+
+ Slide.Operations.push_back(makeSTranslate(glm::vec3(0, 0, 0.0001), false, -1.0, 0.0));
+ Slide.Operations.push_back(makeSRotate (glm::vec3(0, 0, 1), glm::vec3(-1, 1, 0), -90, true, 0.0, 1.0));
+ Slide.Operations.push_back(makeSRotate (glm::vec3(0, 0, 1), glm::vec3(-1, 1, 0), 90, false, -1.0, 0.0));
+ Primitives_t aEnteringPrimitives;
+ aEnteringPrimitives.push_back(Slide);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = false;
+
+ return makeSimpleTransition(std::move(aLeavingPrimitives), std::move(aEnteringPrimitives), aSettings);
+}
+
+std::shared_ptr<OGLTransitionImpl> makeIris()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle (glm::vec2 (0,0), glm::vec2 (1,0), glm::vec2 (0,1));
+ Slide.pushTriangle (glm::vec2 (1,0), glm::vec2 (0,1), glm::vec2 (1,1));
+ Primitives_t aEnteringPrimitives;
+ aEnteringPrimitives.push_back (Slide);
+
+ Slide.Operations.push_back (makeSTranslate (glm::vec3 (0, 0, 0.000001), false, -1, 0));
+ Slide.Operations.push_back (makeSTranslate (glm::vec3 (0, 0, -0.000002), false, 0.5, 1));
+ Primitives_t aLeavingPrimitives;
+ aLeavingPrimitives.push_back (Slide);
+
+
+ Primitive irisPart;
+ int i, nSteps = 24, nParts = 7;
+ double t = 1.0/nSteps, lx = 1, ly = 0, of=2.2, f=1.42;
+
+ for (i=1; i<=nSteps; i++) {
+ double x = cos ((3*2*M_PI*t)/nParts);
+ double y = -sin ((3*2*M_PI*t)/nParts);
+ double cx = (f*x + 1)/2;
+ double cy = (f*y + 1)/2;
+ double lcx = (f*lx + 1)/2;
+ double lcy = (f*ly + 1)/2;
+ double cxo = (of*x + 1)/2;
+ double cyo = (of*y + 1)/2;
+ double lcxo = (of*lx + 1)/2;
+ double lcyo = (of*ly + 1)/2;
+ irisPart.pushTriangle (glm::vec2 (lcx, lcy),
+ glm::vec2 (lcxo, lcyo),
+ glm::vec2 (cx, cy));
+ irisPart.pushTriangle (glm::vec2 (cx, cy),
+ glm::vec2 (lcxo, lcyo),
+ glm::vec2 (cxo, cyo));
+ lx = x;
+ ly = y;
+ t += 1.0/nSteps;
+ }
+
+ std::shared_ptr<Iris> pIris = std::make_shared<Iris>();
+ double angle = 87;
+
+ for (i = 0; i < nParts; i++) {
+ irisPart.Operations.clear ();
+ double rx, ry;
+
+ rx = cos ((2*M_PI*i)/nParts);
+ ry = sin ((2*M_PI*i)/nParts);
+ irisPart.Operations.push_back (makeSRotate (glm::vec3(0, 0, 1), glm::vec3(rx, ry, 0), angle, true, 0.0, 0.5));
+ irisPart.Operations.push_back (makeSRotate (glm::vec3(0, 0, 1), glm::vec3(rx, ry, 0), -angle, true, 0.5, 1));
+ if (i > 0) {
+ irisPart.Operations.push_back (makeSTranslate (glm::vec3(rx, ry, 0), false, -1, 0));
+ irisPart.Operations.push_back (makeSRotate (glm::vec3(0, 0, 1), glm::vec3(0, 0, 0), i*360.0/nParts, false, -1, 0));
+ irisPart.Operations.push_back (makeSTranslate (glm::vec3(-1, 0, 0), false, -1, 0));
+ }
+ irisPart.Operations.push_back(makeSTranslate(glm::vec3(0, 0, 1), false, -2, 0.0));
+ irisPart.Operations.push_back (makeSRotate (glm::vec3(1, .5, 0), glm::vec3(1, 0, 0), -30, false, -1, 0));
+ pIris->pushPrimitive (irisPart);
+ }
+
+ SceneObjects_t aSceneObjects;
+ aSceneObjects.push_back (pIris);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = aSettings.mbUseMipMapEntering = false;
+
+ return makeSimpleTransition(std::move(aLeavingPrimitives), std::move(aEnteringPrimitives), std::move(aSceneObjects), aSettings);
+}
+
+namespace
+{
+
+class RochadeTransition : public ReflectionTransition
+{
+public:
+ RochadeTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : ReflectionTransition(rScene, rSettings)
+ {}
+
+private:
+ virtual void displaySlides_(double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext *pContext) override;
+};
+
+void RochadeTransition::displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext * )
+{
+ applyOverallOperations( nTime, SlideWidthScale, SlideHeightScale );
+
+ if( nTime > .5) {
+ displaySlide( nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale );
+ displaySlide( nTime, glEnteringSlideTex, getScene().getEnteringSlide(), SlideWidthScale, SlideHeightScale );
+ } else {
+ displaySlide( nTime, glEnteringSlideTex, getScene().getEnteringSlide(), SlideWidthScale, SlideHeightScale );
+ displaySlide( nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale );
+ }
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeRochadeTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings)
+{
+ return std::make_shared<RochadeTransition>(
+ TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings)
+ ;
+
+}
+}
+
+std::shared_ptr<OGLTransitionImpl> makeRochade()
+{
+ Primitive Slide;
+ TransitionSettings aSettings;
+
+ double w, h;
+
+ w = 2.2;
+ h = 10;
+
+ Slide.pushTriangle(glm::vec2(0,0),glm::vec2(1,0),glm::vec2(0,1));
+ Slide.pushTriangle(glm::vec2(1,0),glm::vec2(0,1),glm::vec2(1,1));
+
+ Slide.Operations.push_back(makeSEllipseTranslate(w, h, 0.25, -0.25, true, 0, 1));
+ Slide.Operations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0,1,0),glm::vec3(0,0,0), -45, true, true, 0, 1));
+ Primitives_t aLeavingSlide;
+ aLeavingSlide.push_back(Slide);
+
+ Slide.Operations.push_back(makeSScale(glm::vec3(1, -1, 1), glm::vec3(0, -1.02, 0), false, -1, 0));
+ aLeavingSlide.push_back(Slide);
+
+ Slide.Operations.clear();
+ Slide.Operations.push_back(makeSEllipseTranslate(w, h, 0.75, 0.25, true, 0, 1));
+ Slide.Operations.push_back(makeSTranslate(glm::vec3(0, 0, -h), false, -1, 0));
+ Slide.Operations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0,1,0),glm::vec3(0,0,0), -45, true, true, 0, 1));
+ Slide.Operations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0,1,0),glm::vec3(0,0,0), 45, true, false, -1, 0));
+ Primitives_t aEnteringSlide;
+ aEnteringSlide.push_back(Slide);
+
+ Slide.Operations.push_back(makeSScale(glm::vec3(1, -1, 1), glm::vec3(0, -1.02, 0), false, -1, 0));
+ aEnteringSlide.push_back(Slide);
+
+ return makeRochadeTransition(std::move(aLeavingSlide), std::move(aEnteringSlide), aSettings);
+}
+
+static double randFromNeg1to1()
+{
+ return comphelper::rng::uniform_real_distribution(-1.0, std::nextafter(1.0, DBL_MAX));
+}
+
+// TODO(Q3): extract to basegfx
+static glm::vec3 randNormVectorInXYPlane()
+{
+ glm::vec3 toReturn(randFromNeg1to1(),randFromNeg1to1(),0.0);
+ return glm::normalize(toReturn);
+}
+
+template<typename T>
+static T clamp(const T& rIn)
+{
+ return glm::clamp(rIn, T(-1.0), T(1.0));
+}
+
+std::shared_ptr<OGLTransitionImpl> makeRevolvingCircles( sal_uInt16 nCircles , sal_uInt16 nPointsOnCircles )
+{
+ double dAngle(2*M_PI/static_cast<double>( nPointsOnCircles ));
+ if(nCircles < 2 || nPointsOnCircles < 4)
+ return makeNByMTileFlip(1,1);
+ float Radius(1.0/static_cast<double>( nCircles ));
+ float dRadius(Radius);
+ float LastRadius(0.0);
+ float NextRadius(2*Radius);
+
+ /// now we know there is at least two circles
+ /// the first will always be a full circle
+ /// the last will always be the outer shell of the slide with a circle hole
+
+ //add the full circle
+ std::vector<glm::vec2> unScaledTexCoords;
+ float TempAngle(0.0);
+ for(unsigned int Point(0); Point < nPointsOnCircles; ++Point)
+ {
+ unScaledTexCoords.emplace_back( cos(TempAngle - M_PI_2) , sin(TempAngle- M_PI_2) );
+
+ TempAngle += dAngle;
+ }
+
+ Primitives_t aLeavingSlide;
+ Primitives_t aEnteringSlide;
+ {
+ Primitive EnteringSlide;
+ Primitive LeavingSlide;
+ for(int Point(0); Point + 1 < nPointsOnCircles; ++Point)
+ {
+ EnteringSlide.pushTriangle( glm::vec2( 0.5 , 0.5 ) , Radius * unScaledTexCoords[ Point + 1 ] / 2.0f + glm::vec2( 0.5 , 0.5 ) , Radius * unScaledTexCoords[ Point ] / 2.0f + glm::vec2( 0.5 , 0.5 ) );
+ LeavingSlide.pushTriangle( glm::vec2( 0.5 , 0.5 ) , Radius * unScaledTexCoords[ Point + 1 ] / 2.0f + glm::vec2( 0.5 , 0.5 ) , Radius * unScaledTexCoords[ Point ] / 2.0f + glm::vec2( 0.5, 0.5) );
+ }
+ EnteringSlide.pushTriangle( glm::vec2(0.5,0.5) , Radius * unScaledTexCoords[ 0 ] / 2.0f + glm::vec2( 0.5 , 0.5 ) , Radius * unScaledTexCoords[ nPointsOnCircles - 1 ] / 2.0f + glm::vec2( 0.5 , 0.5 ) );
+ LeavingSlide.pushTriangle( glm::vec2(0.5,0.5) , Radius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) , Radius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) );
+
+ glm::vec3 axis(randNormVectorInXYPlane());
+ EnteringSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , 180, true, Radius/2.0 , (NextRadius + 1)/2.0 ) );
+ LeavingSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , 180, true, Radius/2.0 , (NextRadius + 1)/2.0 ) );
+ EnteringSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , -180, false,0.0,1.0) );
+
+ aEnteringSlide.push_back(EnteringSlide);
+ aLeavingSlide.push_back(LeavingSlide);
+ LastRadius = Radius;
+ Radius = NextRadius;
+ NextRadius += dRadius;
+ }
+
+ for(int i(1); i < nCircles - 1; ++i)
+ {
+ Primitive LeavingSlide;
+ Primitive EnteringSlide;
+ for(int Side(0); Side < nPointsOnCircles - 1; ++Side)
+ {
+ EnteringSlide.pushTriangle(Radius*unScaledTexCoords[Side]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) );
+ EnteringSlide.pushTriangle(Radius*unScaledTexCoords[Side]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) , Radius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) );
+
+ LeavingSlide.pushTriangle(Radius*unScaledTexCoords[Side]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) );
+ LeavingSlide.pushTriangle(Radius*unScaledTexCoords[Side]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) , Radius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) );
+ }
+
+ EnteringSlide.pushTriangle(Radius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) );
+ EnteringSlide.pushTriangle(Radius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) , Radius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) );
+
+ LeavingSlide.pushTriangle(Radius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) );
+ LeavingSlide.pushTriangle(Radius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) , Radius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) );
+
+ glm::vec3 axis(randNormVectorInXYPlane());
+ EnteringSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , 180, true, Radius/2.0 , (NextRadius + 1)/2.0 ) );
+ LeavingSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , 180, true, Radius/2.0 , (NextRadius + 1)/2.0 ) );
+ EnteringSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , -180, false,0.0,1.0) );
+
+ aEnteringSlide.push_back(EnteringSlide);
+ aLeavingSlide.push_back(LeavingSlide);
+
+ LastRadius = Radius;
+ Radius = NextRadius;
+ NextRadius += dRadius;
+ }
+ {
+ Radius = sqrt(2.0);
+ Primitive LeavingSlide;
+ Primitive EnteringSlide;
+ for(int Side(0); Side < nPointsOnCircles - 1; ++Side)
+ {
+
+ EnteringSlide.pushTriangle(clamp(Radius*unScaledTexCoords[Side])/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) );
+ EnteringSlide.pushTriangle(clamp(Radius*unScaledTexCoords[Side])/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) , clamp(Radius*unScaledTexCoords[Side + 1])/2.0f + glm::vec2(0.5,0.5) );
+
+ LeavingSlide.pushTriangle(clamp(Radius*unScaledTexCoords[Side])/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) );
+ LeavingSlide.pushTriangle(clamp(Radius*unScaledTexCoords[Side])/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[Side + 1]/2.0f + glm::vec2(0.5,0.5) , clamp(Radius*unScaledTexCoords[Side + 1])/2.0f + glm::vec2(0.5,0.5) );
+ }
+
+ EnteringSlide.pushTriangle(clamp(Radius*unScaledTexCoords[nPointsOnCircles - 1])/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) );
+ EnteringSlide.pushTriangle(clamp(Radius*unScaledTexCoords[nPointsOnCircles - 1])/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) , clamp(Radius*unScaledTexCoords[0])/2.0f + glm::vec2(0.5,0.5) );
+
+ LeavingSlide.pushTriangle(clamp(Radius*unScaledTexCoords[nPointsOnCircles - 1])/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[nPointsOnCircles - 1]/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) );
+ LeavingSlide.pushTriangle(clamp(Radius*unScaledTexCoords[nPointsOnCircles - 1])/2.0f + glm::vec2(0.5,0.5) , LastRadius*unScaledTexCoords[0]/2.0f + glm::vec2(0.5,0.5) , clamp(Radius*unScaledTexCoords[0])/2.0f + glm::vec2(0.5,0.5) );
+
+ glm::vec3 axis(randNormVectorInXYPlane());
+ EnteringSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , 180, true, (LastRadius + dRadius)/2.0 , 1.0 ) );
+ LeavingSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , 180, true, (LastRadius + dRadius)/2.0 , 1.0 ) );
+ EnteringSlide.Operations.push_back( makeSRotate( axis , glm::vec3(0,0,0) , -180, false,0.0,1.0) );
+
+ aEnteringSlide.push_back(EnteringSlide);
+ aLeavingSlide.push_back(LeavingSlide);
+ }
+
+ return makeSimpleTransition(std::move(aLeavingSlide), std::move(aEnteringSlide));
+}
+
+std::shared_ptr<OGLTransitionImpl> makeHelix( sal_uInt16 nRows )
+{
+ double invN(1.0/static_cast<double>(nRows));
+ double iDn = 0.0;
+ double iPDn = invN;
+ Primitives_t aLeavingSlide;
+ Primitives_t aEnteringSlide;
+ for(unsigned int i(0); i < nRows; ++i)
+ {
+ Primitive Tile;
+
+ Tile.pushTriangle(glm::vec2( 1.0 , iDn ) , glm::vec2( 0.0 , iDn ) , glm::vec2( 0.0 , iPDn ));
+
+ Tile.pushTriangle(glm::vec2( 1.0 , iPDn ) , glm::vec2( 1.0 , iDn ) , glm::vec2( 0.0 , iPDn ));
+
+ Tile.Operations.push_back( makeSRotate( glm::vec3( 0 , 1 , 0 ) , ( Tile.getVertex(1) + Tile.getVertex(3) )/2.0f , 180 ,
+ true, std::min(std::max(static_cast<double>(i - nRows/2.0)*invN/2.0,0.0),1.0),
+ std::min(std::max(static_cast<double>(i + nRows/2.0)*invN/2.0,0.0),1.0) ) );
+
+ aLeavingSlide.push_back(Tile);
+
+ Tile.Operations.push_back( makeSRotate( glm::vec3( 0 , 1 , 0 ) , ( Tile.getVertex(1) + Tile.getVertex(3) )/2.0f , -180 , false,0.0,1.0) );
+
+ aEnteringSlide.push_back(Tile);
+
+ iDn += invN;
+ iPDn += invN;
+ }
+
+ return makeSimpleTransition(std::move(aLeavingSlide), std::move(aEnteringSlide));
+}
+
+static float fdiv(int a, int b)
+{
+ return static_cast<float>(a)/b;
+}
+
+static glm::vec2 vec(float x, float y, float nx, float ny)
+{
+ x = x < 0.0 ? 0.0 : x;
+ x = std::min(x, nx);
+ y = y < 0.0 ? 0.0 : y;
+ y = std::min(y, ny);
+ return glm::vec2(fdiv(x, nx), fdiv(y, ny));
+}
+
+std::shared_ptr<OGLTransitionImpl> makeNByMTileFlip( sal_uInt16 n, sal_uInt16 m )
+{
+ Primitives_t aLeavingSlide;
+ Primitives_t aEnteringSlide;
+
+ for (int x = 0; x < n; x++)
+ {
+ for (int y = 0; y < n; y++)
+ {
+ Primitive aTile;
+ glm::vec2 x11 = vec(x, y, n, m);
+ glm::vec2 x12 = vec(x, y+1, n, m);
+ glm::vec2 x21 = vec(x+1, y, n, m);
+ glm::vec2 x22 = vec(x+1, y+1, n, m);
+
+ aTile.pushTriangle(x21, x11, x12);
+ aTile.pushTriangle(x22, x21, x12);
+
+ aTile.Operations.push_back(makeSRotate( glm::vec3(0 , 1, 0), (aTile.getVertex(1) + aTile.getVertex(3)) / 2.0f, 180 , true, x11.x * x11.y / 2.0f , ((x22.x * x22.y) + 1.0f) / 2.0f));
+ aLeavingSlide.push_back(aTile);
+
+ aTile.Operations.push_back(makeSRotate( glm::vec3(0 , 1, 0), (aTile.getVertex(1) + aTile.getVertex(3)) / 2.0f, -180, false, x11.x * x11.y / 2.0f , ((x22.x * x22.y) + 1.0f) / 2.0f));
+ aEnteringSlide.push_back(aTile);
+ }
+ }
+
+ return makeSimpleTransition(std::move(aLeavingSlide), std::move(aEnteringSlide));
+}
+
+Primitive& Primitive::operator=(const Primitive& rvalue)
+{
+ Primitive aTmp(rvalue);
+ swap(aTmp);
+ return *this;
+}
+
+Primitive::Primitive(const Primitive& rvalue)
+ : Operations(rvalue.Operations)
+ , Vertices(rvalue.Vertices)
+{
+}
+
+void Primitive::swap(Primitive& rOther)
+{
+ using std::swap;
+
+ swap(Operations, rOther.Operations);
+ swap(Vertices, rOther.Vertices);
+}
+
+void Primitive::pushTriangle(const glm::vec2& SlideLocation0,const glm::vec2& SlideLocation1,const glm::vec2& SlideLocation2)
+{
+ std::vector<glm::vec3> Verts;
+ std::vector<glm::vec2> Texs;
+ Verts.reserve(3);
+ Texs.reserve(3);
+
+ Verts.emplace_back( 2*SlideLocation0.x - 1, -2*SlideLocation0.y + 1 , 0.0 );
+ Verts.emplace_back( 2*SlideLocation1.x - 1, -2*SlideLocation1.y + 1 , 0.0 );
+ Verts.emplace_back( 2*SlideLocation2.x - 1, -2*SlideLocation2.y + 1 , 0.0 );
+
+ //figure out if they're facing the correct way, and make them face the correct way.
+ glm::vec3 Normal( glm::cross( Verts[0] - Verts[1] , Verts[1] - Verts[2] ) );
+ if(Normal.z >= 0.0)//if the normal is facing us
+ {
+ Texs.push_back(SlideLocation0);
+ Texs.push_back(SlideLocation1);
+ Texs.push_back(SlideLocation2);
+ }
+ else // if the normal is facing away from us, make it face us
+ {
+ Texs.push_back(SlideLocation0);
+ Texs.push_back(SlideLocation2);
+ Texs.push_back(SlideLocation1);
+ Verts.clear();
+ Verts.emplace_back( 2*SlideLocation0.x - 1, -2*SlideLocation0.y + 1 , 0.0 );
+ Verts.emplace_back( 2*SlideLocation2.x - 1, -2*SlideLocation2.y + 1 , 0.0 );
+ Verts.emplace_back( 2*SlideLocation1.x - 1, -2*SlideLocation1.y + 1 , 0.0 );
+ }
+
+ Vertices.push_back({Verts[0], glm::vec3(0, 0, 1), Texs[0]}); //all normals always face the screen when untransformed.
+ Vertices.push_back({Verts[1], glm::vec3(0, 0, 1), Texs[1]}); //all normals always face the screen when untransformed.
+ Vertices.push_back({Verts[2], glm::vec3(0, 0, 1), Texs[2]}); //all normals always face the screen when untransformed.
+}
+
+namespace
+{
+
+class DiamondTransition : public SimpleTransition
+{
+public:
+ DiamondTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : SimpleTransition(rScene, rSettings)
+ {}
+
+private:
+ virtual void displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext *pContext ) override;
+};
+
+Primitives_t makeLeavingSlide(double nTime)
+{
+ Primitive Slide2;
+ if( nTime >= 0.5 ) {
+ double m = 1 - nTime;
+
+ Slide2.pushTriangle (glm::vec2 (0,0), glm::vec2 (m,0), glm::vec2 (0,m));
+ Slide2.pushTriangle (glm::vec2 (nTime,0), glm::vec2 (1,0), glm::vec2 (1,m));
+ Slide2.pushTriangle (glm::vec2 (1,nTime), glm::vec2 (1,1), glm::vec2 (nTime,1));
+ Slide2.pushTriangle (glm::vec2 (0,nTime), glm::vec2 (m,1), glm::vec2 (0,1));
+ } else {
+ double l = 0.5 - nTime;
+ double h = 0.5 + nTime;
+
+ Slide2.pushTriangle (glm::vec2 (0,0), glm::vec2 (1,0), glm::vec2 (0.5,l));
+ Slide2.pushTriangle (glm::vec2 (0.5,l), glm::vec2 (1,0), glm::vec2 (h,0.5));
+ Slide2.pushTriangle (glm::vec2 (1,0), glm::vec2 (1,1), glm::vec2 (h,0.5));
+ Slide2.pushTriangle (glm::vec2 (h,0.5), glm::vec2 (1,1), glm::vec2 (0.5,h));
+ Slide2.pushTriangle (glm::vec2 (0.5,h), glm::vec2 (1,1), glm::vec2 (0,1));
+ Slide2.pushTriangle (glm::vec2 (l,0.5), glm::vec2 (0.5,h), glm::vec2 (0,1));
+ Slide2.pushTriangle (glm::vec2 (0,0), glm::vec2 (l,0.5), glm::vec2 (0,1));
+ Slide2.pushTriangle (glm::vec2 (0,0), glm::vec2 (0.5,l), glm::vec2 (l,0.5));
+ }
+ Slide2.Operations.push_back (makeSTranslate (glm::vec3 (0, 0, 0.00000001), false, -1, 0));
+ Primitives_t aLeavingSlidePrimitives;
+ aLeavingSlidePrimitives.push_back (Slide2);
+
+ return aLeavingSlidePrimitives;
+}
+
+void DiamondTransition::displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex,
+ double SlideWidthScale, double SlideHeightScale, OpenGLContext * )
+{
+ CHECK_GL_ERROR();
+ applyOverallOperations( nTime, SlideWidthScale, SlideHeightScale );
+
+ CHECK_GL_ERROR();
+ displayUnbufferedSlide( nTime, glLeavingSlideTex, makeLeavingSlide(nTime), SlideWidthScale, SlideHeightScale );
+ displaySlide( nTime, glEnteringSlideTex, getScene().getEnteringSlide(), SlideWidthScale, SlideHeightScale );
+ CHECK_GL_ERROR();
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeDiamondTransition(const TransitionSettings& rSettings)
+{
+ Primitive Slide1;
+ Slide1.pushTriangle (glm::vec2 (0,0), glm::vec2 (1,0), glm::vec2 (0,1));
+ Slide1.pushTriangle (glm::vec2 (1,0), glm::vec2 (0,1), glm::vec2 (1,1));
+ Primitives_t aEnteringSlidePrimitives;
+ aEnteringSlidePrimitives.push_back (Slide1);
+ Primitives_t aLeavingSlidePrimitives;
+ aLeavingSlidePrimitives.push_back (Slide1);
+ return std::make_shared<DiamondTransition>(TransitionScene(std::move(aLeavingSlidePrimitives), std::move(aEnteringSlidePrimitives)), rSettings);
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeDiamond()
+{
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = aSettings.mbUseMipMapEntering = false;
+
+ return makeDiamondTransition(aSettings);
+}
+
+std::shared_ptr<OGLTransitionImpl> makeVenetianBlinds( bool vertical, int parts )
+{
+ static double t30 = tan( M_PI/6.0 );
+ double ln = 0;
+ double p = 1.0/parts;
+
+ Primitives_t aLeavingSlide;
+ Primitives_t aEnteringSlide;
+ for( int i=0; i<parts; i++ ) {
+ Primitive Slide;
+ double n = (i + 1)/static_cast<double>(parts);
+ if( vertical ) {
+ Slide.pushTriangle (glm::vec2 (ln,0), glm::vec2 (n,0), glm::vec2 (ln,1));
+ Slide.pushTriangle (glm::vec2 (n,0), glm::vec2 (ln,1), glm::vec2 (n,1));
+ Slide.Operations.push_back(makeRotateAndScaleDepthByWidth(glm::vec3(0, 1, 0), glm::vec3(n + ln - 1, 0, -t30*p), -120, true, true, 0.0, 1.0));
+ } else {
+ Slide.pushTriangle (glm::vec2 (0,ln), glm::vec2 (1,ln), glm::vec2 (0,n));
+ Slide.pushTriangle (glm::vec2 (1,ln), glm::vec2 (0,n), glm::vec2 (1,n));
+ Slide.Operations.push_back(makeRotateAndScaleDepthByHeight(glm::vec3(1, 0, 0), glm::vec3(0, 1 - n - ln, -t30*p), -120, true, true, 0.0, 1.0));
+ }
+ aLeavingSlide.push_back (Slide);
+
+ if( vertical ) {
+ Slide.Operations.push_back(makeSRotate(glm::vec3(0, 1, 0), glm::vec3(2*n - 1, 0, 0), -60, false, -1, 0));
+ Slide.Operations.push_back(makeSRotate(glm::vec3(0, 1, 0), glm::vec3(n + ln - 1, 0, 0), 180, false, -1, 0));
+ } else {
+ Slide.Operations.push_back(makeSRotate(glm::vec3(1, 0, 0), glm::vec3(0, 1 - 2*n, 0), -60, false, -1, 0));
+ Slide.Operations.push_back(makeSRotate(glm::vec3(1, 0, 0), glm::vec3(0, 1 - n - ln, 0), 180, false, -1, 0));
+ }
+ aEnteringSlide.push_back (Slide);
+ ln = n;
+ }
+
+ return makeSimpleTransition(std::move(aLeavingSlide), std::move(aEnteringSlide));
+}
+
+namespace
+{
+
+class FadeSmoothlyTransition : public OGLTransitionImpl
+{
+public:
+ FadeSmoothlyTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : OGLTransitionImpl(rScene, rSettings)
+ {}
+
+private:
+ virtual GLuint makeShader() const override;
+};
+
+GLuint FadeSmoothlyTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "basicVertexShader", "fadeFragmentShader" );
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeFadeSmoothlyTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings)
+{
+ return std::make_shared<FadeSmoothlyTransition>(
+ TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings)
+ ;
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeFadeSmoothly()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle (glm::vec2 (0,0), glm::vec2 (1,0), glm::vec2 (0,1));
+ Slide.pushTriangle (glm::vec2 (1,0), glm::vec2 (0,1), glm::vec2 (1,1));
+ Primitives_t aLeavingSlide;
+ aLeavingSlide.push_back (Slide);
+ Primitives_t aEnteringSlide;
+ aEnteringSlide.push_back (Slide);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = aSettings.mbUseMipMapEntering = false;
+
+ return makeFadeSmoothlyTransition(std::move(aLeavingSlide), std::move(aEnteringSlide), aSettings);
+}
+
+namespace
+{
+
+class FadeThroughColorTransition : public OGLTransitionImpl
+{
+public:
+ FadeThroughColorTransition(const TransitionScene& rScene, const TransitionSettings& rSettings, bool white)
+ : OGLTransitionImpl(rScene, rSettings), useWhite( white )
+ {}
+
+private:
+ virtual GLuint makeShader() const override;
+ bool useWhite;
+};
+
+GLuint FadeThroughColorTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "basicVertexShader", "fadeBlackFragmentShader",
+ useWhite ? "#define use_white" : "", "" );
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeFadeThroughColorTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings,
+ bool white)
+{
+ return std::make_shared<FadeThroughColorTransition>(
+ TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings, white)
+ ;
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeFadeThroughColor( bool white )
+{
+ Primitive Slide;
+
+ Slide.pushTriangle (glm::vec2 (0,0), glm::vec2 (1,0), glm::vec2 (0,1));
+ Slide.pushTriangle (glm::vec2 (1,0), glm::vec2 (0,1), glm::vec2 (1,1));
+ Primitives_t aLeavingSlide;
+ aLeavingSlide.push_back (Slide);
+ Primitives_t aEnteringSlide;
+ aEnteringSlide.push_back (Slide);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = aSettings.mbUseMipMapEntering = false;
+
+ return makeFadeThroughColorTransition(std::move(aLeavingSlide), std::move(aEnteringSlide), aSettings, white);
+}
+
+namespace
+{
+
+class PermTextureTransition : public OGLTransitionImpl
+{
+protected:
+ PermTextureTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : OGLTransitionImpl(rScene, rSettings)
+ , m_nHelperTexture(0)
+ {}
+
+ virtual void finishTransition() override;
+ virtual void prepareTransition( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext ) override;
+
+private:
+ /** various data */
+ GLuint m_nHelperTexture;
+};
+
+void PermTextureTransition::finishTransition()
+{
+ CHECK_GL_ERROR();
+ if ( m_nHelperTexture )
+ {
+ glDeleteTextures( 1, &m_nHelperTexture );
+ m_nHelperTexture = 0;
+ }
+ CHECK_GL_ERROR();
+}
+
+constexpr auto permutation2D = []() constexpr {
+ int permutation256 [256]= {
+ 215, 100, 200, 204, 233, 50, 85, 196,
+ 71, 141, 122, 160, 93, 131, 243, 234,
+ 162, 183, 36, 155, 4, 62, 35, 205,
+ 40, 102, 33, 27, 255, 55, 214, 156,
+ 75, 163, 134, 126, 249, 74, 197, 228,
+ 72, 90, 206, 235, 17, 22, 49, 169,
+ 227, 89, 16, 5, 117, 60, 248, 230,
+ 217, 68, 138, 96, 194, 170, 136, 10,
+ 112, 238, 184, 189, 176, 42, 225, 212,
+ 84, 58, 175, 244, 150, 168, 219, 236,
+ 101, 208, 123, 37, 164, 110, 158, 201,
+ 78, 114, 57, 48, 70, 142, 106, 43,
+ 232, 26, 32, 252, 239, 98, 191, 94,
+ 59, 149, 39, 187, 203, 190, 19, 13,
+ 133, 45, 61, 247, 23, 34, 20, 52,
+ 118, 209, 146, 193, 222, 18, 1, 152,
+ 46, 41, 91, 148, 115, 25, 135, 77,
+ 254, 147, 224, 161, 9, 213, 223, 250,
+ 231, 251, 127, 166, 63, 179, 81, 130,
+ 139, 28, 120, 151, 241, 86, 111, 0,
+ 88, 153, 172, 182, 159, 105, 178, 47,
+ 51, 167, 65, 66, 92, 73, 198, 211,
+ 245, 195, 31, 220, 140, 76, 221, 186,
+ 154, 185, 56, 83, 38, 165, 109, 67,
+ 124, 226, 132, 53, 229, 29, 12, 181,
+ 121, 24, 207, 199, 177, 113, 30, 80,
+ 3, 97, 188, 79, 216, 173, 8, 145,
+ 87, 128, 180, 237, 240, 137, 125, 104,
+ 15, 242, 119, 246, 103, 143, 95, 144,
+ 2, 44, 69, 157, 192, 174, 14, 54,
+ 218, 82, 64, 210, 11, 6, 129, 21,
+ 116, 171, 99, 202, 7, 107, 253, 108
+ };
+ std::array<unsigned char, 256 * 256> a{};
+ for (int y = 0; y < 256; y++)
+ for (int x = 0; x < 256; x++)
+ a[x + y * 256] = permutation256[(y + permutation256[x]) & 0xff];
+ return a;
+}();
+
+void initPermTexture(GLuint *texID)
+{
+ CHECK_GL_ERROR();
+ glGenTextures(1, texID);
+ glBindTexture(GL_TEXTURE_2D, *texID);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RED, GL_UNSIGNED_BYTE,
+ permutation2D.data());
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+ CHECK_GL_ERROR();
+}
+
+void PermTextureTransition::prepareTransition( sal_Int32, sal_Int32, OpenGLContext* )
+{
+ CHECK_GL_ERROR();
+ GLint location = glGetUniformLocation( m_nProgramObject, "permTexture" );
+ if( location != -1 ) {
+ glActiveTexture(GL_TEXTURE1);
+ CHECK_GL_ERROR();
+ if( !m_nHelperTexture )
+ initPermTexture( &m_nHelperTexture );
+
+ glActiveTexture(GL_TEXTURE0);
+ CHECK_GL_ERROR();
+
+ glUniform1i( location, 1 ); // texture unit 1
+ CHECK_GL_ERROR();
+ }
+ CHECK_GL_ERROR();
+}
+
+}
+
+namespace
+{
+
+class StaticNoiseTransition : public PermTextureTransition
+{
+public:
+ StaticNoiseTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : PermTextureTransition(rScene, rSettings)
+ {}
+
+private:
+ virtual GLuint makeShader() const override;
+};
+
+GLuint StaticNoiseTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "basicVertexShader", "staticFragmentShader" );
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeStaticNoiseTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings)
+{
+ return std::make_shared<StaticNoiseTransition>(
+ TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings)
+ ;
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeStatic()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle (glm::vec2 (0,0), glm::vec2 (1,0), glm::vec2 (0,1));
+ Slide.pushTriangle (glm::vec2 (1,0), glm::vec2 (0,1), glm::vec2 (1,1));
+ Primitives_t aLeavingSlide;
+ aLeavingSlide.push_back (Slide);
+ Primitives_t aEnteringSlide;
+ aEnteringSlide.push_back (Slide);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = aSettings.mbUseMipMapEntering = false;
+
+ return makeStaticNoiseTransition(std::move(aLeavingSlide), std::move(aEnteringSlide), aSettings);
+}
+
+namespace
+{
+
+class DissolveTransition : public PermTextureTransition
+{
+public:
+ DissolveTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : PermTextureTransition(rScene, rSettings)
+ {}
+
+private:
+ virtual GLuint makeShader() const override;
+};
+
+GLuint DissolveTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "basicVertexShader", "dissolveFragmentShader" );
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeDissolveTransition(
+ Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings)
+{
+ return std::make_shared<DissolveTransition>(
+ TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings)
+ ;
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeDissolve()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle (glm::vec2 (0,0), glm::vec2 (1,0), glm::vec2 (0,1));
+ Slide.pushTriangle (glm::vec2 (1,0), glm::vec2 (0,1), glm::vec2 (1,1));
+ Primitives_t aLeavingSlide;
+ aLeavingSlide.push_back (Slide);
+ Primitives_t aEnteringSlide;
+ aEnteringSlide.push_back (Slide);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = aSettings.mbUseMipMapEntering = false;
+
+ return makeDissolveTransition(std::move(aLeavingSlide), std::move(aEnteringSlide), aSettings);
+}
+
+namespace
+{
+
+class VortexTransition : public PermTextureTransition
+{
+public:
+ VortexTransition(const TransitionScene& rScene, const TransitionSettings& rSettings, int nNX, int nNY)
+ : PermTextureTransition(rScene, rSettings)
+ , maNumTiles(nNX,nNY)
+ {
+ mvTileInfo.resize(6*maNumTiles.x*maNumTiles.y);
+ mnFramebuffers[0] = 0;
+ mnFramebuffers[1] = 0;
+ mnDepthTextures[0] = 0;
+ mnDepthTextures[1] = 0;
+ }
+
+private:
+ virtual void finishTransition() override;
+ virtual GLuint makeShader() const override;
+ virtual void prepareTransition( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext ) override;
+ virtual void displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext *pContext ) override;
+
+ GLint mnSlideLocation = -1;
+ GLint mnTileInfoLocation = -1;
+ GLuint mnTileInfoBuffer = 0u;
+ GLint mnShadowLocation = -1;
+ std::array<GLuint, 2> mnFramebuffers;
+ std::array<GLuint, 2> mnDepthTextures;
+
+ glm::ivec2 maNumTiles;
+
+ std::vector<GLfloat> mvTileInfo;
+};
+
+void VortexTransition::finishTransition()
+{
+ PermTextureTransition::finishTransition();
+
+ CHECK_GL_ERROR();
+ glDeleteTextures(2, mnDepthTextures.data());
+ mnDepthTextures = {0u, 0u};
+ CHECK_GL_ERROR();
+ glDeleteFramebuffers(2, mnFramebuffers.data());
+ mnFramebuffers = {0u, 0u};
+ glDeleteBuffers(1, &mnTileInfoBuffer);
+ mnTileInfoBuffer = 0u;
+ mnSlideLocation = -1;
+ mnTileInfoLocation = -1;
+ mnShadowLocation = -1;
+ CHECK_GL_ERROR();
+}
+
+GLuint VortexTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "vortexVertexShader", "vortexFragmentShader", "vortexGeometryShader" );
+}
+
+glm::mat4 lookAt(const glm::vec3& eye, const glm::vec3& center, const glm::vec3& up) {
+ glm::vec3 f = glm::normalize(center - eye);
+ glm::vec3 u = glm::normalize(up);
+ glm::vec3 s = glm::normalize(glm::cross(f, u));
+ u = glm::cross(s, f);
+
+ return glm::mat4(s.x, u.x, -f.x, 0,
+ s.y, u.y, -f.y, 0,
+ s.z, u.z, -f.z, 0,
+ -glm::dot(s, eye), -glm::dot(u, eye), glm::dot(f, eye), 1);
+}
+
+void VortexTransition::prepareTransition( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext )
+{
+ CHECK_GL_ERROR();
+ PermTextureTransition::prepareTransition( glLeavingSlideTex, glEnteringSlideTex, pContext );
+ CHECK_GL_ERROR();
+
+ mnSlideLocation = glGetUniformLocation(m_nProgramObject, "slide");
+ mnTileInfoLocation = glGetAttribLocation(m_nProgramObject, "tileInfo");
+ GLint nNumTilesLocation = glGetUniformLocation(m_nProgramObject, "numTiles");
+ mnShadowLocation = glGetUniformLocation(m_nProgramObject, "shadow");
+ GLint nOrthoProjectionMatrix = glGetUniformLocation(m_nProgramObject, "orthoProjectionMatrix");
+ GLint nOrthoViewMatrix = glGetUniformLocation(m_nProgramObject, "orthoViewMatrix");
+ GLint location = glGetUniformLocation(m_nProgramObject, "leavingShadowTexture");
+ glUniform1i(location, 2);
+ location = glGetUniformLocation(m_nProgramObject, "enteringShadowTexture");
+ glUniform1i(location, 3);
+ CHECK_GL_ERROR();
+
+ glUniform2iv(nNumTilesLocation, 1, glm::value_ptr(maNumTiles));
+ CHECK_GL_ERROR();
+
+ glGenBuffers(1, &mnTileInfoBuffer);
+ CHECK_GL_ERROR();
+
+ // We store the (x,y) indexes of the tile each vertex belongs to in a float, so they must fit.
+ assert(maNumTiles.x < 256);
+ assert(maNumTiles.y < 256);
+
+ // Two triangles, i.e. six vertices, per tile
+ {
+ int n = 0;
+ for (int x = 0; x < maNumTiles.x; x++)
+ {
+ for (int y = 0; y < maNumTiles.y; y++)
+ {
+ for (int v = 0; v < 6; v++)
+ {
+ mvTileInfo[n] = x + (y << 8) + (v << 16);
+ n++;
+ }
+ }
+ }
+ }
+
+ glBindBuffer(GL_ARRAY_BUFFER, mnTileInfoBuffer);
+ CHECK_GL_ERROR();
+ glEnableVertexAttribArray(mnTileInfoLocation);
+ CHECK_GL_ERROR();
+ glVertexAttribPointer(mnTileInfoLocation, 1, GL_FLOAT, GL_FALSE, 0, nullptr);
+ CHECK_GL_ERROR();
+ glBufferData(GL_ARRAY_BUFFER, mvTileInfo.size()*sizeof(GLfloat), mvTileInfo.data(), GL_STATIC_DRAW);
+ CHECK_GL_ERROR();
+
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ CHECK_GL_ERROR();
+
+ double EyePos(10.0);
+ double const RealF(1.0);
+ double const RealN(-1.0);
+ double const RealL(-2.0);
+ double RealR(2.0);
+ double const RealB(-2.0);
+ double RealT(2.0);
+ double ClipN(EyePos+5.0*RealN);
+ double ClipF(EyePos+15.0*RealF);
+ double ClipL(RealL*8.0);
+ double ClipR(RealR*8.0);
+ double ClipB(RealB*8.0);
+ double ClipT(RealT*8.0);
+
+ glm::mat4 projection = glm::ortho<float>(ClipL, ClipR, ClipB, ClipT, ClipN, ClipF);
+ //This scaling is to take the plane with BottomLeftCorner(-1,-1,0) and TopRightCorner(1,1,0) and map it to the screen after the perspective division.
+ glm::vec3 scale(1.0 / (((RealR * 2.0 * ClipN) / (EyePos * (ClipR - ClipL))) - ((ClipR + ClipL) / (ClipR - ClipL))),
+ 1.0 / (((RealT * 2.0 * ClipN) / (EyePos * (ClipT - ClipB))) - ((ClipT + ClipB) / (ClipT - ClipB))),
+ 1.0);
+ projection = glm::scale(projection, scale);
+ glUniformMatrix4fv(nOrthoProjectionMatrix, 1, false, glm::value_ptr(projection));
+
+ glm::mat4 view = lookAt(glm::vec3(-1, 1, EyePos), glm::vec3(-0.5, 0.5, 0), glm::vec3(0, 1, 0));
+ glUniformMatrix4fv(nOrthoViewMatrix, 1, false, glm::value_ptr(view));
+
+ // Generate the framebuffers and textures for the shadows.
+ glGenTextures(2, mnDepthTextures.data());
+ glGenFramebuffers(2, mnFramebuffers.data());
+
+ for (int i : {0, 1}) {
+ glBindTexture(GL_TEXTURE_2D, mnDepthTextures[i]);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT16, 2048, 2048, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ glBindFramebuffer(GL_FRAMEBUFFER, mnFramebuffers[i]);
+ glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, mnDepthTextures[i], 0);
+ glDrawBuffer(GL_NONE); // No color buffer is drawn to.
+
+ // Always check that our framebuffer is ok
+ if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+ SAL_WARN("slideshow.opengl", "Wrong framebuffer!");
+ return;
+ }
+ }
+
+ pContext->restoreDefaultFramebuffer();
+ glBindTexture(GL_TEXTURE_2D, 0);
+
+ glActiveTexture( GL_TEXTURE2 );
+ glBindTexture( GL_TEXTURE_2D, mnDepthTextures[0] );
+ glActiveTexture( GL_TEXTURE3 );
+ glBindTexture( GL_TEXTURE_2D, mnDepthTextures[1] );
+ glActiveTexture( GL_TEXTURE0 );
+}
+
+void VortexTransition::displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext * pContext )
+{
+ CHECK_GL_ERROR();
+ applyOverallOperations( nTime, SlideWidthScale, SlideHeightScale );
+ glUniform1f( m_nTimeLocation, nTime );
+ glUniform1f( mnShadowLocation, 1.0 );
+
+ std::array<GLint, 4> viewport;
+ glGetIntegerv(GL_VIEWPORT, viewport.data());
+ glViewport(0, 0, 2048, 2048);
+
+ glBindFramebuffer(GL_FRAMEBUFFER, mnFramebuffers[0]);
+ glClear(GL_DEPTH_BUFFER_BIT);
+ glUniform1f( mnSlideLocation, 0.0 );
+ displaySlide( nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale );
+
+ glBindFramebuffer(GL_FRAMEBUFFER, mnFramebuffers[1]);
+ glClear(GL_DEPTH_BUFFER_BIT);
+ glUniform1f( mnSlideLocation, 1.0 );
+ displaySlide( nTime, glEnteringSlideTex, getScene().getEnteringSlide(), SlideWidthScale, SlideHeightScale );
+
+ glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
+ pContext->restoreDefaultFramebuffer();
+ glUniform1f( mnShadowLocation, 0.0 );
+ glUniform1f( mnSlideLocation, 0.0 );
+ displaySlide( nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale );
+ glUniform1f( mnSlideLocation, 1.0 );
+ displaySlide( nTime, glEnteringSlideTex, getScene().getEnteringSlide(), SlideWidthScale, SlideHeightScale );
+ CHECK_GL_ERROR();
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeVortexTransition(Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings,
+ int NX,
+ int NY)
+{
+ return std::make_shared<VortexTransition>(TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings,
+ NX, NY);
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeVortex()
+{
+ const int NX = 96, NY = 96;
+ Primitive Slide;
+
+ for (int x = 0; x < NX; x++)
+ {
+ for (int y = 0; y < NY; y++)
+ {
+ Slide.pushTriangle (glm::vec2 (fdiv(x,NX),fdiv(y,NY)), glm::vec2 (fdiv(x+1,NX),fdiv(y,NY)), glm::vec2 (fdiv(x,NX),fdiv(y+1,NY)));
+ Slide.pushTriangle (glm::vec2 (fdiv(x+1,NX),fdiv(y,NY)), glm::vec2 (fdiv(x,NX),fdiv(y+1,NY)), glm::vec2 (fdiv(x+1,NX),fdiv(y+1,NY)));
+ }
+ }
+ Primitives_t aLeavingSlide;
+ aLeavingSlide.push_back (Slide);
+ Primitives_t aEnteringSlide;
+ aEnteringSlide.push_back (Slide);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = aSettings.mbUseMipMapEntering = false;
+ aSettings.mnRequiredGLVersion = 3.2f;
+
+ return makeVortexTransition(std::move(aLeavingSlide), std::move(aEnteringSlide), aSettings, NX, NY);
+}
+
+namespace
+{
+
+class RippleTransition : public OGLTransitionImpl
+{
+public:
+ RippleTransition(const TransitionScene& rScene, const TransitionSettings& rSettings, const glm::vec2& rCenter)
+ : OGLTransitionImpl(rScene, rSettings),
+ maCenter(rCenter)
+ {
+ }
+
+private:
+ virtual GLuint makeShader() const override;
+ virtual void prepareTransition( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext ) override;
+ virtual void prepare( double SlideWidth, double SlideHeight ) override;
+
+ glm::vec2 maCenter;
+ GLint maSlideRatioLocation = -1;
+};
+
+GLuint RippleTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "basicVertexShader", "rippleFragmentShader" );
+}
+
+void RippleTransition::prepareTransition( sal_Int32, sal_Int32, OpenGLContext* )
+{
+ GLint nCenterLocation = glGetUniformLocation(m_nProgramObject, "center");
+ CHECK_GL_ERROR();
+
+ glUniform2fv(nCenterLocation, 1, glm::value_ptr(maCenter));
+ CHECK_GL_ERROR();
+
+ maSlideRatioLocation = glGetUniformLocation(m_nProgramObject, "slideRatio");
+ CHECK_GL_ERROR();
+}
+
+void RippleTransition::prepare( double SlideWidth, double SlideHeight )
+{
+ if( maSlideRatioLocation != -1 )
+ glUniform1f( maSlideRatioLocation, SlideWidth / SlideHeight );
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeRippleTransition(Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings)
+{
+ // The center point should be adjustable by the user, but we have no way to do that in the UI
+ return std::make_shared<RippleTransition>(TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings,
+ glm::vec2(0.5, 0.5));
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeRipple()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle (glm::vec2 (0,0), glm::vec2 (1,0), glm::vec2 (0,1));
+ Slide.pushTriangle (glm::vec2 (1,0), glm::vec2 (0,1), glm::vec2 (1,1));
+
+ Primitives_t aLeavingSlide;
+ aLeavingSlide.push_back (Slide);
+
+ Primitives_t aEnteringSlide;
+ aEnteringSlide.push_back (Slide);
+
+ TransitionSettings aSettings;
+ aSettings.mbUseMipMapLeaving = aSettings.mbUseMipMapEntering = false;
+
+ return makeRippleTransition(std::move(aLeavingSlide), std::move(aEnteringSlide), aSettings);
+}
+
+static void createHexagon(Primitive& aHexagon, const int x, const int y, const int NX, const int NY)
+{
+ if (y % 4 == 0)
+ {
+ aHexagon.pushTriangle(vec(x-1, y-1, NX, NY), vec(x, y-2, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x, y-2, NX, NY), vec(x+1, y-1, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x+1, y-1, NX, NY), vec(x+1, y, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x+1, y, NX, NY), vec(x, y+1, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x, y+1, NX, NY), vec(x-1, y, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x-1, y, NX, NY), vec(x-1, y-1, NX, NY), vec(x, y+0.5, NX, NY));
+ }
+ else
+ {
+ aHexagon.pushTriangle(vec(x-2, y-1, NX, NY), vec(x-1, y-2, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x-1, y-2, NX, NY), vec(x, y-1, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x, y-1, NX, NY), vec(x, y, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x, y, NX, NY), vec(x-1, y+1, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x-1, y+1, NX, NY), vec(x-2, y, NX, NY), vec(x, y+0.5, NX, NY));
+ aHexagon.pushTriangle(vec(x-2, y, NX, NY), vec(x-2, y-1, NX, NY), vec(x, y+0.5, NX, NY));
+ }
+}
+
+namespace
+{
+
+class GlitterTransition : public PermTextureTransition
+{
+public:
+ GlitterTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : PermTextureTransition(rScene, rSettings)
+ {
+ }
+
+private:
+ virtual GLuint makeShader() const override;
+ virtual void prepareTransition( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext ) override;
+ virtual void cleanup() override;
+
+ GLuint maBuffer = 0;
+};
+
+GLuint GlitterTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "glitterVertexShader", "glitterFragmentShader" );
+}
+
+struct ThreeFloats
+{
+ GLfloat x, y, z;
+};
+
+void GlitterTransition::prepareTransition( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext )
+{
+ CHECK_GL_ERROR();
+ PermTextureTransition::prepareTransition( glLeavingSlideTex, glEnteringSlideTex, pContext );
+ CHECK_GL_ERROR();
+
+ GLint nNumTilesLocation = glGetUniformLocation(m_nProgramObject, "numTiles");
+ if (nNumTilesLocation != -1) {
+ glUniform2iv(nNumTilesLocation, 1, glm::value_ptr(glm::ivec2(41, 41 * 4 / 3)));
+ CHECK_GL_ERROR();
+ }
+
+ glGenBuffers(1, &maBuffer);
+ glBindBuffer(GL_ARRAY_BUFFER, maBuffer);
+
+ // Upload the center of each hexagon.
+ const Primitive& primitive = getScene().getLeavingSlide()[0];
+ std::vector<ThreeFloats> vertices;
+ for (int i = 2; i < primitive.getVerticesCount(); i += 18) {
+ const glm::vec3& center = primitive.getVertex(i);
+ for (int j = 0; j < 18; ++j)
+ vertices.push_back({center.x, center.y, center.z});
+ }
+ glBufferData(GL_ARRAY_BUFFER, vertices.size() * 3 * sizeof(GLfloat), vertices.data(), GL_STATIC_DRAW);
+
+ GLint location = glGetAttribLocation(m_nProgramObject, "center");
+ if (location != -1) {
+ glEnableVertexAttribArray(location);
+ glVertexAttribPointer( location, 3, GL_FLOAT, false, 0, nullptr );
+ CHECK_GL_ERROR();
+ }
+
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+}
+
+void GlitterTransition::cleanup()
+{
+ CHECK_GL_ERROR();
+ glDeleteBuffers(1, &maBuffer);
+ CHECK_GL_ERROR();
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeGlitterTransition(Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings)
+{
+ return std::make_shared<GlitterTransition>(TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings);
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeGlitter()
+{
+ const int NX = 80;
+ const int NY = NX * 4 / 3;
+
+ Primitives_t aSlide;
+ Primitives_t aEmptySlide;
+ Primitive aHexagon;
+
+ for (int y = 0; y < NY+2; y+=2)
+ for (int x = 0; x < NX+2; x+=2)
+ createHexagon(aHexagon, x, y, NX, NY);
+
+ aSlide.push_back(aHexagon);
+
+ return makeGlitterTransition(std::move(aSlide), std::move(aEmptySlide), TransitionSettings());
+}
+
+namespace
+{
+
+class HoneycombTransition : public PermTextureTransition
+{
+public:
+ HoneycombTransition(const TransitionScene& rScene, const TransitionSettings& rSettings)
+ : PermTextureTransition(rScene, rSettings)
+ {
+ mnDepthTextures[0] = 0;
+ mnDepthTextures[1] = 0;
+ }
+
+private:
+ virtual void finishTransition() override;
+ virtual GLuint makeShader() const override;
+ virtual void prepareTransition( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext ) override;
+ virtual void displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, double SlideWidthScale, double SlideHeightScale, OpenGLContext *pContext ) override;
+
+ GLint maHexagonSizeLocation = -1;
+ GLint maSelectedTextureLocation = -1;
+ GLint mnShadowLocation = -1;
+ GLuint mnFramebuffer = 0u;
+ std::array<GLuint, 2> mnDepthTextures;
+};
+
+void HoneycombTransition::finishTransition()
+{
+ PermTextureTransition::finishTransition();
+
+ CHECK_GL_ERROR();
+ glActiveTexture( GL_TEXTURE2 );
+ glBindTexture( GL_TEXTURE_2D, 0 );
+ glActiveTexture( GL_TEXTURE3 );
+ glBindTexture( GL_TEXTURE_2D, 0 );
+ glActiveTexture( GL_TEXTURE0 );
+ CHECK_GL_ERROR();
+ glDeleteTextures(2, mnDepthTextures.data());
+ mnDepthTextures = {0u, 0u};
+ CHECK_GL_ERROR();
+ glDeleteFramebuffers(1, &mnFramebuffer);
+ mnFramebuffer = 0u;
+ CHECK_GL_ERROR();
+}
+
+GLuint HoneycombTransition::makeShader() const
+{
+ return OpenGLHelper::LoadShaders( "honeycombVertexShader", "honeycombFragmentShader", "honeycombGeometryShader" );
+}
+
+void HoneycombTransition::prepareTransition( sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex, OpenGLContext *pContext )
+{
+ CHECK_GL_ERROR();
+ PermTextureTransition::prepareTransition( glLeavingSlideTex, glEnteringSlideTex, pContext );
+
+ CHECK_GL_ERROR();
+ maHexagonSizeLocation = glGetUniformLocation(m_nProgramObject, "hexagonSize");
+ maSelectedTextureLocation = glGetUniformLocation( m_nProgramObject, "selectedTexture" );
+ mnShadowLocation = glGetUniformLocation(m_nProgramObject, "shadow");
+ GLint nOrthoProjectionMatrix = glGetUniformLocation(m_nProgramObject, "orthoProjectionMatrix");
+ GLint nOrthoViewMatrix = glGetUniformLocation(m_nProgramObject, "orthoViewMatrix");
+ GLint location = glGetUniformLocation(m_nProgramObject, "colorShadowTexture");
+ glUniform1i(location, 2);
+ location = glGetUniformLocation(m_nProgramObject, "depthShadowTexture");
+ glUniform1i(location, 3);
+ CHECK_GL_ERROR();
+
+ // We want to see the entering slide behind the leaving one.
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ CHECK_GL_ERROR();
+
+ double EyePos(10.0);
+ double const RealF(1.0);
+ double const RealN(-1.0);
+ double const RealL(-4.0);
+ double RealR(4.0);
+ double const RealB(-4.0);
+ double RealT(4.0);
+ double ClipN(EyePos+5.0*RealN);
+ double ClipF(EyePos+15.0*RealF);
+ double ClipL(RealL*8.0);
+ double ClipR(RealR*8.0);
+ double ClipB(RealB*8.0);
+ double ClipT(RealT*8.0);
+
+ glm::mat4 projection = glm::ortho<float>(ClipL, ClipR, ClipB, ClipT, ClipN, ClipF);
+ //This scaling is to take the plane with BottomLeftCorner(-1,-1,0) and TopRightCorner(1,1,0) and map it to the screen after the perspective division.
+ glm::vec3 scale(1.0 / (((RealR * 2.0 * ClipN) / (EyePos * (ClipR - ClipL))) - ((ClipR + ClipL) / (ClipR - ClipL))),
+ 1.0 / (((RealT * 2.0 * ClipN) / (EyePos * (ClipT - ClipB))) - ((ClipT + ClipB) / (ClipT - ClipB))),
+ 1.0);
+ projection = glm::scale(projection, scale);
+ glUniformMatrix4fv(nOrthoProjectionMatrix, 1, false, glm::value_ptr(projection));
+
+ glm::mat4 view = lookAt(glm::vec3(0, 0, EyePos), glm::vec3(0, 0, 0), glm::vec3(0, 1, 0));
+ glUniformMatrix4fv(nOrthoViewMatrix, 1, false, glm::value_ptr(view));
+
+ // Generate the framebuffer and textures for the shadows.
+ glGenTextures(2, mnDepthTextures.data());
+ glActiveTexture(GL_TEXTURE2);
+ glBindTexture(GL_TEXTURE_2D, mnDepthTextures[0]);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2048, 2048, 0, GL_RGBA, GL_FLOAT, nullptr);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ glActiveTexture(GL_TEXTURE3);
+ glBindTexture(GL_TEXTURE_2D, mnDepthTextures[1]);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT16, 2048, 2048, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ glActiveTexture(GL_TEXTURE0);
+ glGenFramebuffers(1, &mnFramebuffer);
+ glBindFramebuffer(GL_FRAMEBUFFER, mnFramebuffer);
+ glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, mnDepthTextures[0], 0);
+ glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, mnDepthTextures[1], 0);
+
+ // Always check that our framebuffer is ok
+ if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+ SAL_WARN("slideshow.opengl", "Wrong framebuffer!");
+ return;
+ }
+
+ pContext->restoreDefaultFramebuffer();
+}
+
+void HoneycombTransition::displaySlides_( double nTime, sal_Int32 glLeavingSlideTex, sal_Int32 glEnteringSlideTex,
+ double SlideWidthScale, double SlideHeightScale, OpenGLContext *pContext )
+{
+ CHECK_GL_ERROR();
+ applyOverallOperations(nTime, SlideWidthScale, SlideHeightScale);
+ glUniform1f(m_nTimeLocation, nTime);
+ glUniform1f(mnShadowLocation, 1.0);
+ CHECK_GL_ERROR();
+
+ const float borderSize = 0.15f;
+
+ std::array<GLint, 4> viewport;
+ glGetIntegerv(GL_VIEWPORT, viewport.data());
+ glViewport(0, 0, 2048, 2048);
+ glBindFramebuffer(GL_FRAMEBUFFER, mnFramebuffer);
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glUniform1f(mnShadowLocation, 1.0);
+ glUniform1f(maSelectedTextureLocation, 1.0);
+ glUniform1f(maHexagonSizeLocation, 1.0f - borderSize);
+ displaySlide(nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale);
+ glUniform1f(maHexagonSizeLocation, 1.0f + borderSize);
+ displaySlide(nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale);
+
+ // The back (entering) slide needs to be drawn before the front (leaving) one in order for blending to work.
+ glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
+ pContext->restoreDefaultFramebuffer();
+ glUniform1f(mnShadowLocation, 0.0);
+ glUniform1f(maSelectedTextureLocation, 0.0);
+ glUniform1f(maHexagonSizeLocation, 1.0f - borderSize);
+ displaySlide(nTime, glEnteringSlideTex, getScene().getEnteringSlide(), SlideWidthScale, SlideHeightScale);
+ glUniform1f(maHexagonSizeLocation, 1.0f + borderSize);
+ displaySlide(nTime, glEnteringSlideTex, getScene().getEnteringSlide(), SlideWidthScale, SlideHeightScale);
+ glUniform1f(maSelectedTextureLocation, 1.0);
+ glUniform1f(maHexagonSizeLocation, 1.0f - borderSize);
+ displaySlide(nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale);
+ glUniform1f(maHexagonSizeLocation, 1.0f + borderSize);
+ displaySlide(nTime, glLeavingSlideTex, getScene().getLeavingSlide(), SlideWidthScale, SlideHeightScale);
+ CHECK_GL_ERROR();
+}
+
+std::shared_ptr<OGLTransitionImpl>
+makeHoneycombTransition(Primitives_t&& rLeavingSlidePrimitives,
+ Primitives_t&& rEnteringSlidePrimitives,
+ const TransitionSettings& rSettings)
+{
+ // The center point should be adjustable by the user, but we have no way to do that in the UI
+ return std::make_shared<HoneycombTransition>(TransitionScene(std::move(rLeavingSlidePrimitives), std::move(rEnteringSlidePrimitives)),
+ rSettings);
+}
+
+}
+
+std::shared_ptr<OGLTransitionImpl> makeHoneycomb()
+{
+ const int NX = 21;
+ const int NY = 21;
+
+ TransitionSettings aSettings;
+ aSettings.mnRequiredGLVersion = 3.2f;
+
+ Primitives_t aSlide;
+ Primitive aHexagon;
+ for (int y = 0; y < NY+2; y+=2)
+ for (int x = 0; x < NX+2; x+=2)
+ aHexagon.pushTriangle(glm::vec2((y % 4) ? fdiv(x, NX) : fdiv(x + 1, NX), fdiv(y, NY)), glm::vec2(1, 0), glm::vec2(0, 0));
+ aSlide.push_back(aHexagon);
+
+ return makeHoneycombTransition(std::vector(aSlide), std::vector(aSlide), aSettings);
+}
+
+std::shared_ptr<OGLTransitionImpl> makeNewsflash()
+{
+ Primitive Slide;
+
+ Slide.pushTriangle(glm::vec2(0,0),glm::vec2(1,0),glm::vec2(0,1));
+ Slide.pushTriangle(glm::vec2(1,0),glm::vec2(0,1),glm::vec2(1,1));
+ Slide.Operations.push_back(makeSRotate(glm::vec3(0,0,1),glm::vec3(0,0,0),3000,true,0,0.5));
+ Slide.Operations.push_back(makeSScale(glm::vec3(0.01,0.01,0.01),glm::vec3(0,0,0),true,0,0.5));
+ Slide.Operations.push_back(makeSTranslate(glm::vec3(-10000, 0, 0),false, 0.5, 2));
+ Primitives_t aLeavingSlide;
+ aLeavingSlide.push_back(Slide);
+
+ Slide.Operations.clear();
+ Slide.Operations.push_back(makeSRotate(glm::vec3(0,0,1),glm::vec3(0,0,0),-3000,true,0.5,1));
+ Slide.Operations.push_back(makeSTranslate(glm::vec3(-100, 0, 0),false, -1, 1));
+ Slide.Operations.push_back(makeSTranslate(glm::vec3(100, 0, 0),false, 0.5, 1));
+ Slide.Operations.push_back(makeSScale(glm::vec3(0.01,0.01,0.01),glm::vec3(0,0,0),false,-1,1));
+ Slide.Operations.push_back(makeSScale(glm::vec3(100,100,100),glm::vec3(0,0,0),true,0.5,1));
+ Primitives_t aEnteringSlide;
+ aEnteringSlide.push_back(Slide);
+
+ Operations_t aOverallOperations;
+ aOverallOperations.push_back(makeSRotate(glm::vec3(0,0,1),glm::vec3(0.2,0.2,0),1080,true,0,1));
+
+ return makeSimpleTransition(std::move(aLeavingSlide), std::move(aEnteringSlide), std::move(aOverallOperations));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */