1 files changed, 173 insertions, 0 deletions
diff --git a/vcl/inc/opengl/RenderList.hxx b/vcl/inc/opengl/RenderList.hxx
new file mode 100644
index 000000000..213a2f43b
--- /dev/null
+++ b/vcl/inc/opengl/RenderList.hxx
@@ -0,0 +1,173 @@
+/* -*- 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: */