opengl: use packed texture atlas for glyph cache in win. backend

Change-Id: I6a627699d49bad47213788877fa3947ad2ef83f4

4 files changed, 19 insertions, 11 deletions

diff --git a/vcl/inc/opengl/AccumulatedTextures.hxx b/vcl/inc/opengl/AccumulatedTextures.hxx
index 9ce170c2a0af..e74c06535f69 100644
--- a/vcl/inc/opengl/AccumulatedTextures.hxx
+++ b/vcl/inc/opengl/AccumulatedTextures.hxx
@@ -11,6 +11,8 @@
 #ifndef INCLUDED_VCL_INC_OPENGL_ACCUMULATEDTEXTURES_H
 #define INCLUDED_VCL_INC_OPENGL_ACCUMULATEDTEXTURES_H
 
+#include <vcl/opengl/OpenGLHelper.hxx>
+
 #include <o3tl/make_unique.hxx>
 #include "opengl/texture.hxx"
 #include <memory>
@@ -34,10 +36,10 @@ struct AccumulatedTexturesEntry
         : maTexture(rTexture)
     {}
 
-    void insert(const SalColor& aColor, const SalTwoRect& r2Rect)
+    void insert(const OpenGLTexture& rTexture, const SalColor& aColor, const SalTwoRect& r2Rect)
     {
         TextureDrawParameters& aDrawParameters = maColorTextureDrawParametersMap[aColor];
-        maTexture.FillCoords<GL_TRIANGLES>(aDrawParameters.maTextureCoords, r2Rect, false);
+        rTexture.FillCoords<GL_TRIANGLES>(aDrawParameters.maTextureCoords, r2Rect, false);
 
         GLfloat nX1 = r2Rect.mnDestX;
         GLfloat nY1 = r2Rect.mnDestY;
@@ -86,19 +88,18 @@ public:
         maEntries.clear();
     }
 
-    void insert(const OpenGLTexture& rTexture, const SalColor& aColor, const SalTwoRect& r2Rect)
+    void insert(OpenGLTexture& rTexture, const SalColor& aColor, const SalTwoRect& r2Rect)
     {
         GLuint nTextureId = rTexture.Id();
 
-        auto iterator = maEntries.find(nTextureId);
-
-        if (iterator == maEntries.end())
+        if (maEntries.find(nTextureId) == maEntries.end())
         {
-            maEntries[nTextureId] = o3tl::make_unique<AccumulatedTexturesEntry>(rTexture);
+            OpenGLTexture aWholeTexture(rTexture.GetWholeTexture());
+            maEntries[nTextureId] = o3tl::make_unique<AccumulatedTexturesEntry>(aWholeTexture);
         }
 
         std::unique_ptr<AccumulatedTexturesEntry>& rEntry = maEntries[nTextureId];
-        rEntry->insert(aColor, r2Rect);
+        rEntry->insert(rTexture, aColor, r2Rect);
     }
 
     AccumulatedTexturesMap& getAccumulatedTexturesMap()
diff --git a/vcl/inc/opengl/texture.hxx b/vcl/inc/opengl/texture.hxx
index f48a1a166b03..a220875ba1ac 100644
--- a/vcl/inc/opengl/texture.hxx
+++ b/vcl/inc/opengl/texture.hxx
@@ -96,7 +96,7 @@ private:
 
 public:
                     OpenGLTexture();
-                    OpenGLTexture(ImplOpenGLTexture* pImpl, Rectangle aRectangle, int nSlotNumber = 0);
+                    OpenGLTexture(ImplOpenGLTexture* pImpl, Rectangle aRectangle, int nSlotNumber);
 
                     OpenGLTexture( int nWidth, int nHeight, bool bAllocate = true );
                     OpenGLTexture( int nWidth, int nHeight, int nFormat, int nType, void const * pData );
@@ -113,13 +113,15 @@ public:
 
     void            GetCoord( GLfloat* pCoord, const SalTwoRect& rPosAry, bool bInverted=false ) const;
     void            GetWholeCoord( GLfloat* pCoord ) const;
-
+    OpenGLTexture   GetWholeTexture();
     void            Bind();
     void            Unbind();
     void            Read( GLenum nFormat, GLenum nType, sal_uInt8* pData );
     GLuint          AddStencil();
     GLuint          StencilId() const;
 
+    bool            CopyData(int nWidth, int nHeight, int nFormat, int nType, sal_uInt8* pData);
+
     void            SaveToFile(const OUString& rFileName);
 
     GLenum          GetFilter() const;
diff --git a/vcl/inc/openglgdiimpl.hxx b/vcl/inc/openglgdiimpl.hxx
index 0fb2941ace9c..756190135daa 100644
--- a/vcl/inc/openglgdiimpl.hxx
+++ b/vcl/inc/openglgdiimpl.hxx
@@ -147,7 +147,7 @@ public:
     void DrawLinearGradient( const Gradient& rGradient, const Rectangle& rRect );
     void DrawAxialGradient( const Gradient& rGradient, const Rectangle& rRect );
     void DrawRadialGradient( const Gradient& rGradient, const Rectangle& rRect );
-    void DeferredTextDraw(const OpenGLTexture& rTexture, const SalColor nMaskColor, const SalTwoRect& rPosAry);
+    void DeferredTextDraw(OpenGLTexture& rTexture, const SalColor nMaskColor, const SalTwoRect& rPosAry);
     void FlushDeferredDrawing(bool bInDraw = false);
 
 public:
diff --git a/vcl/inc/win/salgdi.h b/vcl/inc/win/salgdi.h
index ffd83ab251ad..8866dcfbc289 100644
--- a/vcl/inc/win/salgdi.h
+++ b/vcl/inc/win/salgdi.h
@@ -172,11 +172,16 @@ public:
 
     SalTwoRect getTwoRect() { return maRects; }
 
+    Size getBitmapSize() { return Size(maRects.mnSrcWidth, maRects.mnSrcHeight); }
+
     /// Reset the DC with the defined color.
     void fill(sal_uInt32 color);
 
     /// Obtain the texture; the caller must delete it after use.
     OpenGLTexture* getTexture();
+
+    /// Copy bitmap data to the texture. Texutre must be initialized and the correct size to hold the bitmap.
+    bool copyToTexture(OpenGLTexture& aTexture);
 };
 
 class WinSalGraphics : public SalGraphics