1 files changed, 494 insertions, 0 deletions
diff --git a/xbmc/guilib/GUIFontTTFGL.cpp b/xbmc/guilib/GUIFontTTFGL.cpp
new file mode 100644
index 0000000..e6dbc03
--- /dev/null
+++ b/xbmc/guilib/GUIFontTTFGL.cpp
@@ -0,0 +1,494 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "GUIFontTTFGL.h"
+
+#include "GUIFont.h"
+#include "GUIFontManager.h"
+#include "ServiceBroker.h"
+#include "Texture.h"
+#include "TextureManager.h"
+#include "gui3d.h"
+#include "utils/GLUtils.h"
+#include "utils/log.h"
+#include "windowing/GraphicContext.h"
+#ifdef HAS_GL
+#include "rendering/gl/RenderSystemGL.h"
+#elif HAS_GLES
+#include "rendering/gles/RenderSystemGLES.h"
+#endif
+#include "rendering/MatrixGL.h"
+
+#include <cassert>
+#include <memory>
+
+// stuff for freetype
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_GLYPH_H
+#include FT_OUTLINE_H
+
+namespace
+{
+constexpr size_t ELEMENT_ARRAY_MAX_CHAR_INDEX = 1000;
+} /* namespace */
+
+CGUIFontTTF* CGUIFontTTF::CreateGUIFontTTF(const std::string& fontIdent)
+{
+  return new CGUIFontTTFGL(fontIdent);
+}
+
+CGUIFontTTFGL::CGUIFontTTFGL(const std::string& fontIdent) : CGUIFontTTF(fontIdent)
+{
+}
+
+CGUIFontTTFGL::~CGUIFontTTFGL(void)
+{
+  // It's important that all the CGUIFontCacheEntry objects are
+  // destructed before the CGUIFontTTFGL goes out of scope, because
+  // our virtual methods won't be accessible after this point
+  m_dynamicCache.Flush();
+  DeleteHardwareTexture();
+}
+
+bool CGUIFontTTFGL::FirstBegin()
+{
+#if defined(HAS_GL)
+  GLenum pixformat = GL_RED;
+  GLenum internalFormat;
+  unsigned int major, minor;
+  CRenderSystemGL* renderSystem = dynamic_cast<CRenderSystemGL*>(CServiceBroker::GetRenderSystem());
+  renderSystem->GetRenderVersion(major, minor);
+  if (major >= 3)
+    internalFormat = GL_R8;
+  else
+    internalFormat = GL_LUMINANCE;
+  renderSystem->EnableShader(ShaderMethodGL::SM_FONTS);
+#else
+  CRenderSystemGLES* renderSystem =
+      dynamic_cast<CRenderSystemGLES*>(CServiceBroker::GetRenderSystem());
+  renderSystem->EnableGUIShader(ShaderMethodGLES::SM_FONTS);
+  GLenum pixformat = GL_ALPHA; // deprecated
+  GLenum internalFormat = GL_ALPHA;
+#endif
+
+  if (m_textureStatus == TEXTURE_REALLOCATED)
+  {
+    if (glIsTexture(m_nTexture))
+      CServiceBroker::GetGUI()->GetTextureManager().ReleaseHwTexture(m_nTexture);
+    m_textureStatus = TEXTURE_VOID;
+  }
+
+  if (m_textureStatus == TEXTURE_VOID)
+  {
+    // Have OpenGL generate a texture object handle for us
+    glGenTextures(1, static_cast<GLuint*>(&m_nTexture));
+
+    // Bind the texture object
+    glBindTexture(GL_TEXTURE_2D, m_nTexture);
+
+    // Set the texture's stretching properties
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    // Set the texture image -- THIS WORKS, so the pixels must be wrong.
+    glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, m_texture->GetWidth(), m_texture->GetHeight(), 0,
+                 pixformat, GL_UNSIGNED_BYTE, 0);
+
+    VerifyGLState();
+    m_textureStatus = TEXTURE_UPDATED;
+  }
+
+  if (m_textureStatus == TEXTURE_UPDATED)
+  {
+    // Copies one more line in case we have to sample from there
+    m_updateY2 = std::min(m_updateY2 + 1, m_texture->GetHeight());
+
+    glBindTexture(GL_TEXTURE_2D, m_nTexture);
+    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, m_updateY1, m_texture->GetWidth(), m_updateY2 - m_updateY1,
+                    pixformat, GL_UNSIGNED_BYTE,
+                    m_texture->GetPixels() + m_updateY1 * m_texture->GetPitch());
+
+    m_updateY1 = m_updateY2 = 0;
+    m_textureStatus = TEXTURE_READY;
+  }
+
+  // Turn Blending On
+  glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE_MINUS_DST_ALPHA, GL_ONE);
+  glEnable(GL_BLEND);
+  glActiveTexture(GL_TEXTURE0);
+  glBindTexture(GL_TEXTURE_2D, m_nTexture);
+
+  return true;
+}
+
+void CGUIFontTTFGL::LastEnd()
+{
+  CWinSystemBase* const winSystem = CServiceBroker::GetWinSystem();
+  if (!winSystem)
+    return;
+
+#ifdef HAS_GL
+  CRenderSystemGL* renderSystem = dynamic_cast<CRenderSystemGL*>(CServiceBroker::GetRenderSystem());
+
+  GLint posLoc = renderSystem->ShaderGetPos();
+  GLint colLoc = renderSystem->ShaderGetCol();
+  GLint tex0Loc = renderSystem->ShaderGetCoord0();
+  GLint modelLoc = renderSystem->ShaderGetModel();
+
+  CreateStaticVertexBuffers();
+
+  // Enable the attributes used by this shader
+  glEnableVertexAttribArray(posLoc);
+  glEnableVertexAttribArray(colLoc);
+  glEnableVertexAttribArray(tex0Loc);
+
+  if (!m_vertex.empty())
+  {
+
+    // Deal with vertices that had to use software clipping
+    std::vector<SVertex> vecVertices(6 * (m_vertex.size() / 4));
+    SVertex* vertices = &vecVertices[0];
+    for (size_t i = 0; i < m_vertex.size(); i += 4)
+    {
+      *vertices++ = m_vertex[i];
+      *vertices++ = m_vertex[i + 1];
+      *vertices++ = m_vertex[i + 2];
+
+      *vertices++ = m_vertex[i + 1];
+      *vertices++ = m_vertex[i + 3];
+      *vertices++ = m_vertex[i + 2];
+    }
+    vertices = &vecVertices[0];
+
+    GLuint VertexVBO;
+
+    glGenBuffers(1, &VertexVBO);
+    glBindBuffer(GL_ARRAY_BUFFER, VertexVBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(SVertex) * vecVertices.size(), &vecVertices[0],
+                 GL_STATIC_DRAW);
+
+    glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, sizeof(SVertex),
+                          reinterpret_cast<const GLvoid*>(offsetof(SVertex, x)));
+    glVertexAttribPointer(colLoc, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(SVertex),
+                          reinterpret_cast<const GLvoid*>(offsetof(SVertex, r)));
+    glVertexAttribPointer(tex0Loc, 2, GL_FLOAT, GL_FALSE, sizeof(SVertex),
+                          reinterpret_cast<const GLvoid*>(offsetof(SVertex, u)));
+
+    glDrawArrays(GL_TRIANGLES, 0, vecVertices.size());
+
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glDeleteBuffers(1, &VertexVBO);
+  }
+
+#else
+  // GLES 2.0 version.
+  CRenderSystemGLES* renderSystem =
+      dynamic_cast<CRenderSystemGLES*>(CServiceBroker::GetRenderSystem());
+
+  GLint posLoc = renderSystem->GUIShaderGetPos();
+  GLint colLoc = renderSystem->GUIShaderGetCol();
+  GLint tex0Loc = renderSystem->GUIShaderGetCoord0();
+  GLint modelLoc = renderSystem->GUIShaderGetModel();
+
+
+  CreateStaticVertexBuffers();
+
+  // Enable the attributes used by this shader
+  glEnableVertexAttribArray(posLoc);
+  glEnableVertexAttribArray(colLoc);
+  glEnableVertexAttribArray(tex0Loc);
+
+  if (!m_vertex.empty())
+  {
+    // Deal with vertices that had to use software clipping
+    std::vector<SVertex> vecVertices(6 * (m_vertex.size() / 4));
+    SVertex* vertices = &vecVertices[0];
+
+    for (size_t i = 0; i < m_vertex.size(); i += 4)
+    {
+      *vertices++ = m_vertex[i];
+      *vertices++ = m_vertex[i + 1];
+      *vertices++ = m_vertex[i + 2];
+
+      *vertices++ = m_vertex[i + 1];
+      *vertices++ = m_vertex[i + 3];
+      *vertices++ = m_vertex[i + 2];
+    }
+
+    vertices = &vecVertices[0];
+
+    glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, sizeof(SVertex),
+                          reinterpret_cast<char*>(vertices) + offsetof(SVertex, x));
+    glVertexAttribPointer(colLoc, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(SVertex),
+                          reinterpret_cast<char*>(vertices) + offsetof(SVertex, r));
+    glVertexAttribPointer(tex0Loc, 2, GL_FLOAT, GL_FALSE, sizeof(SVertex),
+                          reinterpret_cast<char*>(vertices) + offsetof(SVertex, u));
+
+    glDrawArrays(GL_TRIANGLES, 0, vecVertices.size());
+  }
+#endif
+
+  if (!m_vertexTrans.empty())
+  {
+    // Deal with the vertices that can be hardware clipped and therefore translated
+
+    // Bind our pre-calculated array to GL_ELEMENT_ARRAY_BUFFER
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_elementArrayHandle);
+    // Store current scissor
+    CGraphicContext& context = winSystem->GetGfxContext();
+    CRect scissor = context.StereoCorrection(context.GetScissors());
+
+    for (size_t i = 0; i < m_vertexTrans.size(); i++)
+    {
+      if (m_vertexTrans[i].m_vertexBuffer->bufferHandle == 0)
+      {
+        continue;
+      }
+
+      // Apply the clip rectangle
+      CRect clip = renderSystem->ClipRectToScissorRect(m_vertexTrans[i].m_clip);
+      if (!clip.IsEmpty())
+      {
+        // intersect with current scissor
+        clip.Intersect(scissor);
+        // skip empty clip
+        if (clip.IsEmpty())
+          continue;
+        renderSystem->SetScissors(clip);
+      }
+
+      // Apply the translation to the currently active (top-of-stack) model view matrix
+      glMatrixModview.Push();
+      glMatrixModview.Get().Translatef(m_vertexTrans[i].m_translateX, m_vertexTrans[i].m_translateY,
+                                       m_vertexTrans[i].m_translateZ);
+      glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glMatrixModview.Get());
+
+      // Bind the buffer to the OpenGL context's GL_ARRAY_BUFFER binding point
+      glBindBuffer(GL_ARRAY_BUFFER, m_vertexTrans[i].m_vertexBuffer->bufferHandle);
+
+      // Do the actual drawing operation, split into groups of characters no
+      // larger than the pre-determined size of the element array
+      for (size_t character = 0; m_vertexTrans[i].m_vertexBuffer->size > character;
+           character += ELEMENT_ARRAY_MAX_CHAR_INDEX)
+      {
+        size_t count = m_vertexTrans[i].m_vertexBuffer->size - character;
+        count = std::min<size_t>(count, ELEMENT_ARRAY_MAX_CHAR_INDEX);
+
+        // Set up the offsets of the various vertex attributes within the buffer
+        // object bound to GL_ARRAY_BUFFER
+        glVertexAttribPointer(
+            posLoc, 3, GL_FLOAT, GL_FALSE, sizeof(SVertex),
+            reinterpret_cast<GLvoid*>(character * sizeof(SVertex) * 4 + offsetof(SVertex, x)));
+        glVertexAttribPointer(
+            colLoc, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(SVertex),
+            reinterpret_cast<GLvoid*>(character * sizeof(SVertex) * 4 + offsetof(SVertex, r)));
+        glVertexAttribPointer(
+            tex0Loc, 2, GL_FLOAT, GL_FALSE, sizeof(SVertex),
+            reinterpret_cast<GLvoid*>(character * sizeof(SVertex) * 4 + offsetof(SVertex, u)));
+
+        glDrawElements(GL_TRIANGLES, 6 * count, GL_UNSIGNED_SHORT, 0);
+      }
+
+      glMatrixModview.Pop();
+    }
+    // Restore the original scissor rectangle
+    renderSystem->SetScissors(scissor);
+    // Restore the original model view matrix
+    glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glMatrixModview.Get());
+    // Unbind GL_ARRAY_BUFFER and GL_ELEMENT_ARRAY_BUFFER
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+  }
+
+  // Disable the attributes used by this shader
+  glDisableVertexAttribArray(posLoc);
+  glDisableVertexAttribArray(colLoc);
+  glDisableVertexAttribArray(tex0Loc);
+
+#ifdef HAS_GL
+  renderSystem->DisableShader();
+#else
+  renderSystem->DisableGUIShader();
+#endif
+}
+
+CVertexBuffer CGUIFontTTFGL::CreateVertexBuffer(const std::vector<SVertex>& vertices) const
+{
+  assert(vertices.size() % 4 == 0);
+  GLuint bufferHandle = 0;
+
+  // Do not create empty buffers, leave buffer as 0, it will be ignored in drawing stage
+  if (!vertices.empty())
+  {
+    // Generate a unique buffer object name and put it in bufferHandle
+    glGenBuffers(1, &bufferHandle);
+    // Bind the buffer to the OpenGL context's GL_ARRAY_BUFFER binding point
+    glBindBuffer(GL_ARRAY_BUFFER, bufferHandle);
+    // Create a data store for the buffer object bound to the GL_ARRAY_BUFFER
+    // binding point (i.e. our buffer object) and initialise it from the
+    // specified client-side pointer
+    glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(SVertex), vertices.data(),
+                 GL_STATIC_DRAW);
+    // Unbind GL_ARRAY_BUFFER
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+  }
+
+  return CVertexBuffer(bufferHandle, vertices.size() / 4, this);
+}
+
+void CGUIFontTTFGL::DestroyVertexBuffer(CVertexBuffer& buffer) const
+{
+  if (buffer.bufferHandle != 0)
+  {
+    // Release the buffer name for reuse
+    glDeleteBuffers(1, static_cast<GLuint*>(&buffer.bufferHandle));
+    buffer.bufferHandle = 0;
+  }
+}
+
+std::unique_ptr<CTexture> CGUIFontTTFGL::ReallocTexture(unsigned int& newHeight)
+{
+  newHeight = CTexture::PadPow2(newHeight);
+
+  std::unique_ptr<CTexture> newTexture =
+      CTexture::CreateTexture(m_textureWidth, newHeight, XB_FMT_A8);
+
+  if (!newTexture || !newTexture->GetPixels())
+  {
+    CLog::Log(LOGERROR, "GUIFontTTFGL::{}: Error creating new cache texture for size {:f}",
+              __func__, m_height);
+    return nullptr;
+  }
+
+  m_textureHeight = newTexture->GetHeight();
+  m_textureScaleY = 1.0f / m_textureHeight;
+  m_textureWidth = newTexture->GetWidth();
+  m_textureScaleX = 1.0f / m_textureWidth;
+  if (m_textureHeight < newHeight)
+    CLog::Log(LOGWARNING, "GUIFontTTFGL::{}: allocated new texture with height of {}, requested {}",
+              __func__, m_textureHeight, newHeight);
+  m_staticCache.Flush();
+  m_dynamicCache.Flush();
+
+  memset(newTexture->GetPixels(), 0, m_textureHeight * newTexture->GetPitch());
+  if (m_texture)
+  {
+    m_updateY1 = 0;
+    m_updateY2 = m_texture->GetHeight();
+
+    unsigned char* src = m_texture->GetPixels();
+    unsigned char* dst = newTexture->GetPixels();
+    for (unsigned int y = 0; y < m_texture->GetHeight(); y++)
+    {
+      memcpy(dst, src, m_texture->GetPitch());
+      src += m_texture->GetPitch();
+      dst += newTexture->GetPitch();
+    }
+  }
+
+  m_textureStatus = TEXTURE_REALLOCATED;
+
+  return newTexture;
+}
+
+bool CGUIFontTTFGL::CopyCharToTexture(
+    FT_BitmapGlyph bitGlyph, unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2)
+{
+  FT_Bitmap bitmap = bitGlyph->bitmap;
+
+  unsigned char* source = bitmap.buffer;
+  unsigned char* target = m_texture->GetPixels() + y1 * m_texture->GetPitch() + x1;
+
+  for (unsigned int y = y1; y < y2; y++)
+  {
+    memcpy(target, source, x2 - x1);
+    source += bitmap.width;
+    target += m_texture->GetPitch();
+  }
+
+  switch (m_textureStatus)
+  {
+    case TEXTURE_UPDATED:
+    {
+      m_updateY1 = std::min(m_updateY1, y1);
+      m_updateY2 = std::max(m_updateY2, y2);
+    }
+    break;
+
+    case TEXTURE_READY:
+    {
+      m_updateY1 = y1;
+      m_updateY2 = y2;
+      m_textureStatus = TEXTURE_UPDATED;
+    }
+    break;
+
+    case TEXTURE_REALLOCATED:
+    {
+      m_updateY2 = std::max(m_updateY2, y2);
+    }
+    break;
+
+    case TEXTURE_VOID:
+    default:
+      break;
+  }
+
+  return true;
+}
+
+void CGUIFontTTFGL::DeleteHardwareTexture()
+{
+  if (m_textureStatus != TEXTURE_VOID)
+  {
+    if (glIsTexture(m_nTexture))
+      CServiceBroker::GetGUI()->GetTextureManager().ReleaseHwTexture(m_nTexture);
+
+    m_textureStatus = TEXTURE_VOID;
+    m_updateY1 = m_updateY2 = 0;
+  }
+}
+
+void CGUIFontTTFGL::CreateStaticVertexBuffers(void)
+{
+  if (m_staticVertexBufferCreated)
+    return;
+
+  // Bind a new buffer to the OpenGL context's GL_ELEMENT_ARRAY_BUFFER binding point
+  glGenBuffers(1, &m_elementArrayHandle);
+  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_elementArrayHandle);
+
+  // Create an array holding the mesh indices to convert quads to triangles
+  GLushort index[ELEMENT_ARRAY_MAX_CHAR_INDEX][6];
+  for (size_t i = 0; i < ELEMENT_ARRAY_MAX_CHAR_INDEX; i++)
+  {
+    index[i][0] = 4 * i;
+    index[i][1] = 4 * i + 1;
+    index[i][2] = 4 * i + 2;
+    index[i][3] = 4 * i + 1;
+    index[i][4] = 4 * i + 3;
+    index[i][5] = 4 * i + 2;
+  }
+
+  glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof index, index, GL_STATIC_DRAW);
+  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+  m_staticVertexBufferCreated = true;
+}
+
+void CGUIFontTTFGL::DestroyStaticVertexBuffers(void)
+{
+  if (!m_staticVertexBufferCreated)
+    return;
+
+  glDeleteBuffers(1, &m_elementArrayHandle);
+  m_staticVertexBufferCreated = false;
+}
+
+GLuint CGUIFontTTFGL::m_elementArrayHandle{0};
+bool CGUIFontTTFGL::m_staticVertexBufferCreated{false};