1/*
2 Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
3 Copyright (C) 2015 Igalia S.L.
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public License
16 along with this library; see the file COPYING.LIB. If not, write to
17 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
19 */
20
21#ifndef TextureMapperGL_h
22#define TextureMapperGL_h
23
24#if USE(TEXTURE_MAPPER_GL)
25
26#include "ClipStack.h"
27#include "FilterOperation.h"
28#include "IntSize.h"
29#include "TextureMapper.h"
30#include "TextureMapperContextAttributes.h"
31#include "TextureMapperGLHeaders.h"
32#include "TransformationMatrix.h"
33
34namespace WebCore {
35
36class TextureMapperGLData;
37class TextureMapperShaderProgram;
38class FilterOperation;
39
40// An OpenGL-ES2 implementation of TextureMapper.
41class TextureMapperGL : public TextureMapper {
42public:
43 TextureMapperGL();
44 virtual ~TextureMapperGL();
45
46 enum Flag {
47 NoFlag = 0x00,
48 ShouldBlend = 0x01,
49 ShouldFlipTexture = 0x02,
50 ShouldUseARBTextureRect = 0x04,
51 ShouldAntialias = 0x08,
52 ShouldRotateTexture90 = 0x10,
53 ShouldRotateTexture180 = 0x20,
54 ShouldRotateTexture270 = 0x40,
55 ShouldConvertTextureBGRAToRGBA = 0x80,
56 ShouldConvertTextureARGBToRGBA = 0x100,
57 ShouldNotBlend = 0x200
58 };
59
60 typedef int Flags;
61
62 // TextureMapper implementation
63 void drawBorder(const Color&, float borderWidth, const FloatRect&, const TransformationMatrix&) override;
64 void drawNumber(int number, const Color&, const FloatPoint&, const TransformationMatrix&) override;
65 void drawTexture(const BitmapTexture&, const FloatRect&, const TransformationMatrix&, float opacity, unsigned exposedEdges) override;
66 virtual void drawTexture(GLuint texture, Flags, const IntSize& textureSize, const FloatRect& targetRect, const TransformationMatrix& modelViewMatrix, float opacity, unsigned exposedEdges = AllEdges);
67 void drawSolidColor(const FloatRect&, const TransformationMatrix&, const Color&, bool) override;
68 void clearColor(const Color&) override;
69
70 void bindSurface(BitmapTexture* surface) override;
71 BitmapTexture* currentSurface();
72 void beginClip(const TransformationMatrix&, const FloatRect&) override;
73 void beginPainting(PaintFlags = 0) override;
74 void endPainting() override;
75 void endClip() override;
76 IntRect clipBounds() override;
77 IntSize maxTextureSize() const override { return IntSize(2000, 2000); }
78 Ref<BitmapTexture> createTexture() override { return createTexture(GL_DONT_CARE); }
79 Ref<BitmapTexture> createTexture(GLint internalFormat) override;
80
81 void drawFiltered(const BitmapTexture& sourceTexture, const BitmapTexture* contentTexture, const FilterOperation&, int pass);
82
83 void setEnableEdgeDistanceAntialiasing(bool enabled) { m_enableEdgeDistanceAntialiasing = enabled; }
84
85private:
86 void drawTexturedQuadWithProgram(TextureMapperShaderProgram&, uint32_t texture, Flags, const IntSize&, const FloatRect&, const TransformationMatrix& modelViewMatrix, float opacity);
87 void draw(const FloatRect&, const TransformationMatrix& modelViewMatrix, TextureMapperShaderProgram&, GLenum drawingMode, Flags);
88
89 void drawUnitRect(TextureMapperShaderProgram&, GLenum drawingMode);
90 void drawEdgeTriangles(TextureMapperShaderProgram&);
91
92 bool beginScissorClip(const TransformationMatrix&, const FloatRect&);
93 void bindDefaultSurface();
94 ClipStack& clipStack();
95 inline TextureMapperGLData& data() { return *m_data; }
96
97 TextureMapperContextAttributes m_contextAttributes;
98 TextureMapperGLData* m_data;
99 ClipStack m_clipStack;
100 bool m_enableEdgeDistanceAntialiasing;
101};
102
103} // namespace WebCore
104
105#endif // USE(TEXTURE_MAPPER_GL)
106
107#endif // TextureMapperGL_h
108