1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef LayerTilerChromium_h
#define LayerTilerChromium_h
#if USE(ACCELERATED_COMPOSITING)
#include "LayerChromium.h"
#include "LayerTexture.h"
#include "PlatformCanvas.h"
#include "TilingData.h"
#include <wtf/HashTraits.h>
#include <wtf/OwnArrayPtr.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class GraphicsContext3D;
class LayerRendererChromium;
class TilePaintInterface {
public:
virtual void paint(GraphicsContext& context, const IntRect& contentRect) = 0;
};
class LayerTilerChromium {
WTF_MAKE_NONCOPYABLE(LayerTilerChromium);
public:
enum BorderTexelOption { HasBorderTexels, NoBorderTexels };
static PassOwnPtr<LayerTilerChromium> create(LayerRendererChromium*, const IntSize& tileSize, BorderTexelOption);
~LayerTilerChromium();
// Set invalidations to be potentially repainted during update().
void invalidateRect(const IntRect& contentRect);
void invalidateEntireLayer();
// Paint all invalidations and missing tiles needed to draw the contentRect
// into the internal canvas.
void update(TilePaintInterface& painter, const IntRect& contentRect);
// Reserve and upload tile textures from the internal canvas.
void uploadCanvas();
// Reserve and upload tile textures from an externally painted buffer.
void updateFromPixels(const IntRect& contentRect, const IntRect& paintRect, const uint8_t* pixels);
// Draw all tiles that intersect with the content rect.
void draw(const IntRect& contentRect, const TransformationMatrix&, float opacity);
// Set position of this tiled layer in content space.
void setLayerPosition(const IntPoint& position);
// Change the tile size. This may invalidate all the existing tiles.
void setTileSize(const IntSize& size);
void setLayerRenderer(LayerRendererChromium*);
bool skipsDraw() const { return m_skipsDraw; }
typedef ProgramBinding<VertexShaderPosTexTransform, FragmentShaderTexAlpha> Program;
// If this tiler has exactly one tile, return its texture. Otherwise, null.
LayerTexture* getSingleTexture();
private:
LayerTilerChromium(LayerRendererChromium*, const IntSize& tileSize, BorderTexelOption);
class Tile : public RefCounted<Tile> {
WTF_MAKE_NONCOPYABLE(Tile);
public:
explicit Tile(PassOwnPtr<LayerTexture> tex) : m_tex(tex), m_i(-1), m_j(-1) {}
LayerTexture* texture() { return m_tex.get(); }
bool dirty() const { return !m_dirtyLayerRect.isEmpty(); }
void clearDirty() { m_dirtyLayerRect = IntRect(); }
int i() const { return m_i; }
int j() const { return m_j; }
void moveTo(int i, int j) { m_i = i; m_j = j; }
// Layer-space dirty rectangle that needs to be repainted.
IntRect m_dirtyLayerRect;
private:
OwnPtr<LayerTexture> m_tex;
int m_i;
int m_j;
};
void drawTexturedQuad(GraphicsContext3D*, const TransformationMatrix& projectionMatrix, const TransformationMatrix& drawMatrix,
float width, float height, float opacity,
float texTranslateX, float texTranslateY,
float texScaleX, float texScaleY,
const LayerTilerChromium::Program*);
// Grow layer size to contain this rectangle.
void growLayerToContain(const IntRect& contentRect);
LayerRendererChromium* layerRenderer() const { return m_layerRenderer; }
GraphicsContext3D* layerRendererContext() const;
Tile* createTile(int i, int j);
// Invalidate any tiles which do not intersect with the contentRect
void invalidateTiles(const IntRect& contentRect);
void reset();
void contentRectToTileIndices(const IntRect& contentRect, int &left, int &top, int &right, int &bottom) const;
IntRect contentRectToLayerRect(const IntRect& contentRect) const;
IntRect layerRectToContentRect(const IntRect& layerRect) const;
Tile* tileAt(int, int) const;
IntRect tileContentRect(const Tile*) const;
IntRect tileLayerRect(const Tile*) const;
IntSize m_tileSize;
IntPoint m_layerPosition;
bool m_skipsDraw;
// Default hash key traits for integers disallow 0 and -1 as a key, so
// use a custom hash trait which disallows -1 and -2 instead.
typedef std::pair<int, int> TileMapKey;
struct TileMapKeyTraits : HashTraits<TileMapKey> {
static const bool emptyValueIsZero = false;
static const bool needsDestruction = false;
static TileMapKey emptyValue() { return std::make_pair(-1, -1); }
static void constructDeletedValue(TileMapKey& slot) { slot = std::make_pair(-2, -2); }
static bool isDeletedValue(TileMapKey value) { return value.first == -2 && value.second == -2; }
};
// FIXME: The mapped value in TileMap should really be an OwnPtr, as the
// refcount of a Tile should never be more than 1. However, HashMap
// doesn't easily support OwnPtr as a value.
typedef HashMap<TileMapKey, RefPtr<Tile>, DefaultHash<TileMapKey>::Hash, TileMapKeyTraits> TileMap;
TileMap m_tiles;
// Tightly packed set of unused tiles.
Vector<RefPtr<Tile> > m_unusedTiles;
// State held between update and uploadCanvas.
IntRect m_paintRect;
IntRect m_updateRect;
PlatformCanvas m_canvas;
// Cache a tile-sized pixel buffer to draw into.
OwnArrayPtr<uint8_t> m_tilePixels;
TilingData m_tilingData;
LayerRendererChromium* m_layerRenderer;
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif
|
