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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#ifndef INCLUDED_VCL_INC_OPENGL_RENDERLIST_H
#define INCLUDED_VCL_INC_OPENGL_RENDERLIST_H
#include <unordered_map>
#include <glm/glm.hpp>
#include <vcl/salgtype.hxx>
#include <basegfx/range/b2drange.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <opengl/texture.hxx>
#include <com/sun/star/drawing/LineCap.hpp>
struct Vertex
{
glm::vec2 position;
glm::vec4 color;
glm::vec4 lineData;
};
static_assert(sizeof(Vertex) == (2*4 + 4*4 + 4*4), "Vertex struct has wrong size/alignment");
struct RenderParameters
{
std::vector<Vertex> maVertices;
std::vector<GLuint> maIndices;
};
struct RenderTextureParameters
{
std::vector<GLfloat> maVertices;
std::vector<GLfloat> maTextureCoords;
std::vector<GLubyte> maColors;
OpenGLTexture maTexture;
};
struct RenderEntry
{
basegfx::B2DRange maOverlapTrackingRectangle;
RenderParameters maTriangleParameters;
RenderParameters maLineParameters;
std::unordered_map<GLuint, RenderTextureParameters> maTextureParametersMap;
bool hasTriangles() const
{
return !maTriangleParameters.maVertices.empty();
}
bool hasLines() const
{
return !maLineParameters.maVertices.empty();
}
bool hasTextures() const
{
return !maTextureParametersMap.empty();
}
};
class RenderList
{
private:
std::vector<RenderEntry> maRenderEntries;
std::vector<basegfx::B2DRange> maRectangles;
bool doesOverlap(const basegfx::B2DRange& rDrawRectangle)
{
if (!maRenderEntries.back().maOverlapTrackingRectangle.overlaps(rDrawRectangle))
return false;
for (const basegfx::B2DRange& rRectangle : maRectangles)
{
if (rRectangle.overlaps(rDrawRectangle))
return true;
}
return false;
}
void checkOverlapping(const basegfx::B2DRange& rDrawRectangle)
{
if (maRenderEntries.empty() || doesOverlap(rDrawRectangle))
{
maRenderEntries.emplace_back();
maRenderEntries.back().maOverlapTrackingRectangle = rDrawRectangle;
maRectangles.clear();
maRectangles.reserve(30);
maRectangles.push_back(rDrawRectangle);
}
else
{
maRenderEntries.back().maOverlapTrackingRectangle.expand(rDrawRectangle);
if (maRectangles.size() < 30)
{
maRectangles.push_back(rDrawRectangle);
}
else
{
basegfx::B2DRange aTempRectangle(maRectangles[0]);
aTempRectangle.expand(rDrawRectangle);
double minArea = aTempRectangle.getWidth() * aTempRectangle.getHeight();
size_t index = 0;
double area;
for (size_t i = 1; i < maRectangles.size(); ++i)
{
aTempRectangle = maRectangles[i];
aTempRectangle.expand(rDrawRectangle);
area = aTempRectangle.getWidth() * aTempRectangle.getHeight();
if (area < minArea)
index = i;
}
maRectangles[index].expand(rDrawRectangle);
}
}
}
public:
RenderList() = default;
bool empty()
{
return maRenderEntries.empty();
}
void clear()
{
maRenderEntries.clear();
}
std::vector<RenderEntry>& getEntries()
{
return maRenderEntries;
}
VCL_DLLPUBLIC void addDrawTextureWithMaskColor(OpenGLTexture const & rTexture, Color nColor, const SalTwoRect& r2Rect);
void addDrawPixel(long nX, long nY, Color nColor);
void addDrawRectangle(long nX, long nY, long nWidth, long nHeight, double fTransparency,
Color nLineColor, Color nFillColor);
void addDrawLine(long nX1, long nY1, long nX2, long nY2, Color nLineColor, bool bUseAA);
void addDrawPolyPolygon(const basegfx::B2DPolyPolygon& rPolyPolygon, double fTransparency,
Color nLineColor, Color nFillColor, bool bUseAA);
void addDrawPolyLine(const basegfx::B2DPolygon& rPolygon, double fTransparency,
double fLineWidth, basegfx::B2DLineJoin eLineJoin,
css::drawing::LineCap eLineCap, double fMiterMinimumAngle,
Color nLineColor, bool bUseAA);
};
#endif // INCLUDED_VCL_INC_OPENGL_RENDERLIST_H
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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