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| 1 /* | 1 /* |
| 2 * Copyright (c) 2010, Google Inc. All rights reserved. | 2 * Copyright (c) 2010, Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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| 40 #include "public/platform/WebGraphicsContext3D.h" | 40 #include "public/platform/WebGraphicsContext3D.h" |
| 41 #include "third_party/khronos/GLES2/gl2.h" | 41 #include "third_party/khronos/GLES2/gl2.h" |
| 42 #include "third_party/khronos/GLES2/gl2ext.h" | 42 #include "third_party/khronos/GLES2/gl2ext.h" |
| 43 #include "third_party/skia/include/core/SkBitmap.h" | 43 #include "third_party/skia/include/core/SkBitmap.h" |
| 44 #include "wtf/Deque.h" | 44 #include "wtf/Deque.h" |
| 45 #include "wtf/Noncopyable.h" | 45 #include "wtf/Noncopyable.h" |
| 46 #include "wtf/OwnPtr.h" | 46 #include "wtf/OwnPtr.h" |
| 47 #include "wtf/PassOwnPtr.h" | 47 #include "wtf/PassOwnPtr.h" |
| 48 | 48 |
| 49 namespace blink { | 49 namespace blink { |
| 50 |
| 51 class Extensions3DUtil; |
| 52 class ImageBuffer; |
| 53 class ImageData; |
| 50 class WebExternalBitmap; | 54 class WebExternalBitmap; |
| 51 class WebExternalTextureLayer; | 55 class WebExternalTextureLayer; |
| 52 class WebGraphicsContext3D; | 56 class WebGraphicsContext3D; |
| 53 class WebLayer; | 57 class WebLayer; |
| 54 } | |
| 55 | |
| 56 namespace blink { | |
| 57 class Extensions3DUtil; | |
| 58 class ImageData; | |
| 59 class ImageBuffer; | |
| 60 | 58 |
| 61 // Abstract interface to allow basic context eviction management | 59 // Abstract interface to allow basic context eviction management |
| 62 class PLATFORM_EXPORT ContextEvictionManager : public RefCounted<ContextEviction
Manager> { | 60 class PLATFORM_EXPORT ContextEvictionManager : public RefCounted<ContextEviction
Manager> { |
| 63 public: | 61 public: |
| 64 virtual ~ContextEvictionManager() {}; | 62 virtual ~ContextEvictionManager() {}; |
| 65 | 63 |
| 66 virtual void forciblyLoseOldestContext(const String& reason) = 0; | 64 virtual void forciblyLoseOldestContext(const String& reason) = 0; |
| 67 virtual IntSize oldestContextSize() = 0; | 65 virtual IntSize oldestContextSize() = 0; |
| 68 }; | 66 }; |
| 69 | 67 |
| 70 // Manages a rendering target (framebuffer + attachment) for a canvas. Can publ
ish its rendering | 68 // Manages a rendering target (framebuffer + attachment) for a canvas. Can publ
ish its rendering |
| 71 // results to a blink::WebLayer for compositing. | 69 // results to a WebLayer for compositing. |
| 72 class PLATFORM_EXPORT DrawingBuffer : public RefCounted<DrawingBuffer>, public b
link::WebExternalTextureLayerClient { | 70 class PLATFORM_EXPORT DrawingBuffer : public RefCounted<DrawingBuffer>, public W
ebExternalTextureLayerClient { |
| 73 // If we used CHROMIUM_image as the backing storage for our buffers, | 71 // If we used CHROMIUM_image as the backing storage for our buffers, |
| 74 // we need to know the mapping from texture id to image. | 72 // we need to know the mapping from texture id to image. |
| 75 struct TextureInfo { | 73 struct TextureInfo { |
| 76 Platform3DObject textureId; | 74 Platform3DObject textureId; |
| 77 blink::WGC3Duint imageId; | 75 WGC3Duint imageId; |
| 78 | 76 |
| 79 TextureInfo() | 77 TextureInfo() |
| 80 : textureId(0) | 78 : textureId(0) |
| 81 , imageId(0) | 79 , imageId(0) |
| 82 { | 80 { |
| 83 } | 81 } |
| 84 }; | 82 }; |
| 85 | 83 |
| 86 struct MailboxInfo : public RefCounted<MailboxInfo> { | 84 struct MailboxInfo : public RefCounted<MailboxInfo> { |
| 87 blink::WebExternalTextureMailbox mailbox; | 85 WebExternalTextureMailbox mailbox; |
| 88 TextureInfo textureInfo; | 86 TextureInfo textureInfo; |
| 89 IntSize size; | 87 IntSize size; |
| 90 // This keeps the parent drawing buffer alive as long as the compositor
is | 88 // This keeps the parent drawing buffer alive as long as the compositor
is |
| 91 // referring to one of the mailboxes DrawingBuffer produced. The parent
drawing buffer is | 89 // referring to one of the mailboxes DrawingBuffer produced. The parent
drawing buffer is |
| 92 // cleared when the compositor returns the mailbox. See mailboxReleased(
). | 90 // cleared when the compositor returns the mailbox. See mailboxReleased(
). |
| 93 RefPtr<DrawingBuffer> m_parentDrawingBuffer; | 91 RefPtr<DrawingBuffer> m_parentDrawingBuffer; |
| 94 }; | 92 }; |
| 95 public: | 93 public: |
| 96 enum PreserveDrawingBuffer { | 94 enum PreserveDrawingBuffer { |
| 97 Preserve, | 95 Preserve, |
| 98 Discard | 96 Discard |
| 99 }; | 97 }; |
| 100 | 98 |
| 101 static PassRefPtr<DrawingBuffer> create(PassOwnPtr<blink::WebGraphicsContext
3D>, const IntSize&, PreserveDrawingBuffer, blink::WebGraphicsContext3D::Attribu
tes requestedAttributes, PassRefPtr<ContextEvictionManager>); | 99 static PassRefPtr<DrawingBuffer> create(PassOwnPtr<WebGraphicsContext3D>, co
nst IntSize&, PreserveDrawingBuffer, WebGraphicsContext3D::Attributes requestedA
ttributes, PassRefPtr<ContextEvictionManager>); |
| 102 | 100 |
| 103 virtual ~DrawingBuffer(); | 101 virtual ~DrawingBuffer(); |
| 104 | 102 |
| 105 // Destruction will be completed after all mailboxes are released. | 103 // Destruction will be completed after all mailboxes are released. |
| 106 void beginDestruction(); | 104 void beginDestruction(); |
| 107 | 105 |
| 108 // Issues a glClear() on all framebuffers associated with this DrawingBuffer
. The caller is responsible for | 106 // Issues a glClear() on all framebuffers associated with this DrawingBuffer
. The caller is responsible for |
| 109 // making the context current and setting the clear values and masks. Modifi
es the framebuffer binding. | 107 // making the context current and setting the clear values and masks. Modifi
es the framebuffer binding. |
| 110 void clearFramebuffers(GLbitfield clearMask); | 108 void clearFramebuffers(GLbitfield clearMask); |
| 111 | 109 |
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| 136 void setActiveTextureUnit(GLint textureUnit) { m_activeTextureUnit = texture
Unit; } | 134 void setActiveTextureUnit(GLint textureUnit) { m_activeTextureUnit = texture
Unit; } |
| 137 | 135 |
| 138 bool multisample() const; | 136 bool multisample() const; |
| 139 | 137 |
| 140 Platform3DObject framebuffer() const; | 138 Platform3DObject framebuffer() const; |
| 141 | 139 |
| 142 void markContentsChanged(); | 140 void markContentsChanged(); |
| 143 void markLayerComposited(); | 141 void markLayerComposited(); |
| 144 bool layerComposited() const; | 142 bool layerComposited() const; |
| 145 | 143 |
| 146 blink::WebLayer* platformLayer(); | 144 WebLayer* platformLayer(); |
| 147 void paintCompositedResultsToCanvas(ImageBuffer*); | 145 void paintCompositedResultsToCanvas(ImageBuffer*); |
| 148 | 146 |
| 149 blink::WebGraphicsContext3D* context(); | 147 WebGraphicsContext3D* context(); |
| 150 | 148 |
| 151 // Returns the actual context attributes for this drawing buffer which may d
iffer from the | 149 // Returns the actual context attributes for this drawing buffer which may d
iffer from the |
| 152 // requested context attributes due to implementation limits. | 150 // requested context attributes due to implementation limits. |
| 153 blink::WebGraphicsContext3D::Attributes getActualAttributes() const { return
m_actualAttributes; } | 151 WebGraphicsContext3D::Attributes getActualAttributes() const { return m_actu
alAttributes; } |
| 154 | 152 |
| 155 // WebExternalTextureLayerClient implementation. | 153 // WebExternalTextureLayerClient implementation. |
| 156 virtual bool prepareMailbox(blink::WebExternalTextureMailbox*, blink::WebExt
ernalBitmap*) OVERRIDE; | 154 virtual bool prepareMailbox(WebExternalTextureMailbox*, WebExternalBitmap*)
OVERRIDE; |
| 157 virtual void mailboxReleased(const blink::WebExternalTextureMailbox&, bool l
ostResource = false) OVERRIDE; | 155 virtual void mailboxReleased(const WebExternalTextureMailbox&, bool lostReso
urce = false) OVERRIDE; |
| 158 | 156 |
| 159 // Destroys the TEXTURE_2D binding for the owned context | 157 // Destroys the TEXTURE_2D binding for the owned context |
| 160 bool copyToPlatformTexture(blink::WebGraphicsContext3D*, Platform3DObject te
xture, GLenum internalFormat, | 158 bool copyToPlatformTexture(WebGraphicsContext3D*, Platform3DObject texture,
GLenum internalFormat, |
| 161 GLenum destType, GLint level, bool premultiplyAlpha, bool flipY, bool fr
omFrontBuffer = false); | 159 GLenum destType, GLint level, bool premultiplyAlpha, bool flipY, bool fr
omFrontBuffer = false); |
| 162 | 160 |
| 163 void setPackAlignment(GLint param); | 161 void setPackAlignment(GLint param); |
| 164 | 162 |
| 165 void paintRenderingResultsToCanvas(ImageBuffer*); | 163 void paintRenderingResultsToCanvas(ImageBuffer*); |
| 166 PassRefPtr<Uint8ClampedArray> paintRenderingResultsToImageData(int&, int&); | 164 PassRefPtr<Uint8ClampedArray> paintRenderingResultsToImageData(int&, int&); |
| 167 | 165 |
| 168 protected: // For unittests | 166 protected: // For unittests |
| 169 DrawingBuffer( | 167 DrawingBuffer( |
| 170 PassOwnPtr<blink::WebGraphicsContext3D>, | 168 PassOwnPtr<WebGraphicsContext3D>, |
| 171 PassOwnPtr<Extensions3DUtil>, | 169 PassOwnPtr<Extensions3DUtil>, |
| 172 bool multisampleExtensionSupported, | 170 bool multisampleExtensionSupported, |
| 173 bool packedDepthStencilExtensionSupported, | 171 bool packedDepthStencilExtensionSupported, |
| 174 PreserveDrawingBuffer, | 172 PreserveDrawingBuffer, |
| 175 blink::WebGraphicsContext3D::Attributes requestedAttributes, | 173 WebGraphicsContext3D::Attributes requestedAttributes, |
| 176 PassRefPtr<ContextEvictionManager>); | 174 PassRefPtr<ContextEvictionManager>); |
| 177 | 175 |
| 178 bool initialize(const IntSize&); | 176 bool initialize(const IntSize&); |
| 179 | 177 |
| 180 private: | 178 private: |
| 181 void mailboxReleasedWhileDestructionInProgress(const blink::WebExternalTextu
reMailbox&); | 179 void mailboxReleasedWhileDestructionInProgress(const WebExternalTextureMailb
ox&); |
| 182 | 180 |
| 183 unsigned createColorTexture(); | 181 unsigned createColorTexture(); |
| 184 // Create the depth/stencil and multisample buffers, if needed. | 182 // Create the depth/stencil and multisample buffers, if needed. |
| 185 void createSecondaryBuffers(); | 183 void createSecondaryBuffers(); |
| 186 bool resizeFramebuffer(const IntSize&); | 184 bool resizeFramebuffer(const IntSize&); |
| 187 bool resizeMultisampleFramebuffer(const IntSize&); | 185 bool resizeMultisampleFramebuffer(const IntSize&); |
| 188 void resizeDepthStencil(const IntSize&); | 186 void resizeDepthStencil(const IntSize&); |
| 189 | 187 |
| 190 // Bind to the m_framebufferBinding if it's not 0. | 188 // Bind to the m_framebufferBinding if it's not 0. |
| 191 void restoreFramebufferBinding(); | 189 void restoreFramebufferBinding(); |
| 192 | 190 |
| 193 void clearPlatformLayer(); | 191 void clearPlatformLayer(); |
| 194 | 192 |
| 195 PassRefPtr<MailboxInfo> recycledMailbox(); | 193 PassRefPtr<MailboxInfo> recycledMailbox(); |
| 196 PassRefPtr<MailboxInfo> createNewMailbox(const TextureInfo&); | 194 PassRefPtr<MailboxInfo> createNewMailbox(const TextureInfo&); |
| 197 void deleteMailbox(const blink::WebExternalTextureMailbox&); | 195 void deleteMailbox(const WebExternalTextureMailbox&); |
| 198 | 196 |
| 199 // Updates the current size of the buffer, ensuring that s_currentResourceUs
ePixels is updated. | 197 // Updates the current size of the buffer, ensuring that s_currentResourceUs
ePixels is updated. |
| 200 void setSize(const IntSize& size); | 198 void setSize(const IntSize& size); |
| 201 | 199 |
| 202 // Calculates the difference in pixels between the current buffer size and t
he proposed size. | 200 // Calculates the difference in pixels between the current buffer size and t
he proposed size. |
| 203 static int pixelDelta(const IntSize& newSize, const IntSize& curSize); | 201 static int pixelDelta(const IntSize& newSize, const IntSize& curSize); |
| 204 | 202 |
| 205 // Given the desired buffer size, provides the largest dimensions that will
fit in the pixel budget | 203 // Given the desired buffer size, provides the largest dimensions that will
fit in the pixel budget |
| 206 // Returns true if the buffer will only fit if the oldest WebGL context is f
orcibly lost | 204 // Returns true if the buffer will only fit if the oldest WebGL context is f
orcibly lost |
| 207 IntSize adjustSizeWithContextEviction(const IntSize&, bool& evictContext); | 205 IntSize adjustSizeWithContextEviction(const IntSize&, bool& evictContext); |
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| 227 // Allocate buffer storage to be sent to compositor using either texImage2D
or CHROMIUM_image based on available support. | 225 // Allocate buffer storage to be sent to compositor using either texImage2D
or CHROMIUM_image based on available support. |
| 228 void allocateTextureMemory(TextureInfo*, const IntSize&); | 226 void allocateTextureMemory(TextureInfo*, const IntSize&); |
| 229 void deleteChromiumImageForTexture(TextureInfo*); | 227 void deleteChromiumImageForTexture(TextureInfo*); |
| 230 | 228 |
| 231 PreserveDrawingBuffer m_preserveDrawingBuffer; | 229 PreserveDrawingBuffer m_preserveDrawingBuffer; |
| 232 bool m_scissorEnabled; | 230 bool m_scissorEnabled; |
| 233 Platform3DObject m_texture2DBinding; | 231 Platform3DObject m_texture2DBinding; |
| 234 Platform3DObject m_framebufferBinding; | 232 Platform3DObject m_framebufferBinding; |
| 235 GLenum m_activeTextureUnit; | 233 GLenum m_activeTextureUnit; |
| 236 | 234 |
| 237 OwnPtr<blink::WebGraphicsContext3D> m_context; | 235 OwnPtr<WebGraphicsContext3D> m_context; |
| 238 OwnPtr<Extensions3DUtil> m_extensionsUtil; | 236 OwnPtr<Extensions3DUtil> m_extensionsUtil; |
| 239 IntSize m_size; | 237 IntSize m_size; |
| 240 blink::WebGraphicsContext3D::Attributes m_requestedAttributes; | 238 WebGraphicsContext3D::Attributes m_requestedAttributes; |
| 241 bool m_multisampleExtensionSupported; | 239 bool m_multisampleExtensionSupported; |
| 242 bool m_packedDepthStencilExtensionSupported; | 240 bool m_packedDepthStencilExtensionSupported; |
| 243 Platform3DObject m_fbo; | 241 Platform3DObject m_fbo; |
| 244 // DrawingBuffer's output is double-buffered. m_colorBuffer is the back buff
er. | 242 // DrawingBuffer's output is double-buffered. m_colorBuffer is the back buff
er. |
| 245 TextureInfo m_colorBuffer; | 243 TextureInfo m_colorBuffer; |
| 246 TextureInfo m_frontColorBuffer; | 244 TextureInfo m_frontColorBuffer; |
| 247 | 245 |
| 248 // This is used when we have OES_packed_depth_stencil. | 246 // This is used when we have OES_packed_depth_stencil. |
| 249 Platform3DObject m_depthStencilBuffer; | 247 Platform3DObject m_depthStencilBuffer; |
| 250 | 248 |
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| 264 bool m_layerComposited; | 262 bool m_layerComposited; |
| 265 | 263 |
| 266 enum MultisampleMode { | 264 enum MultisampleMode { |
| 267 None, | 265 None, |
| 268 ImplicitResolve, | 266 ImplicitResolve, |
| 269 ExplicitResolve, | 267 ExplicitResolve, |
| 270 }; | 268 }; |
| 271 | 269 |
| 272 MultisampleMode m_multisampleMode; | 270 MultisampleMode m_multisampleMode; |
| 273 | 271 |
| 274 blink::WebGraphicsContext3D::Attributes m_actualAttributes; | 272 WebGraphicsContext3D::Attributes m_actualAttributes; |
| 275 unsigned m_internalColorFormat; | 273 unsigned m_internalColorFormat; |
| 276 unsigned m_colorFormat; | 274 unsigned m_colorFormat; |
| 277 unsigned m_internalRenderbufferFormat; | 275 unsigned m_internalRenderbufferFormat; |
| 278 int m_maxTextureSize; | 276 int m_maxTextureSize; |
| 279 int m_sampleCount; | 277 int m_sampleCount; |
| 280 int m_packAlignment; | 278 int m_packAlignment; |
| 281 bool m_destructionInProgress; | 279 bool m_destructionInProgress; |
| 282 | 280 |
| 283 OwnPtr<blink::WebExternalTextureLayer> m_layer; | 281 OwnPtr<WebExternalTextureLayer> m_layer; |
| 284 | 282 |
| 285 // All of the mailboxes that this DrawingBuffer has ever created. | 283 // All of the mailboxes that this DrawingBuffer has ever created. |
| 286 Vector<RefPtr<MailboxInfo> > m_textureMailboxes; | 284 Vector<RefPtr<MailboxInfo> > m_textureMailboxes; |
| 287 // Mailboxes that were released by the compositor can be used again by this
DrawingBuffer. | 285 // Mailboxes that were released by the compositor can be used again by this
DrawingBuffer. |
| 288 Deque<blink::WebExternalTextureMailbox> m_recycledMailboxQueue; | 286 Deque<WebExternalTextureMailbox> m_recycledMailboxQueue; |
| 289 | 287 |
| 290 RefPtr<ContextEvictionManager> m_contextEvictionManager; | 288 RefPtr<ContextEvictionManager> m_contextEvictionManager; |
| 291 | 289 |
| 292 // If the width and height of the Canvas's backing store don't | 290 // If the width and height of the Canvas's backing store don't |
| 293 // match those that we were given in the most recent call to | 291 // match those that we were given in the most recent call to |
| 294 // reshape(), then we need an intermediate bitmap to read back the | 292 // reshape(), then we need an intermediate bitmap to read back the |
| 295 // frame buffer into. This seems to happen when CSS styles are | 293 // frame buffer into. This seems to happen when CSS styles are |
| 296 // used to resize the Canvas. | 294 // used to resize the Canvas. |
| 297 SkBitmap m_resizingBitmap; | 295 SkBitmap m_resizingBitmap; |
| 298 | 296 |
| 299 // Used to flip a bitmap vertically. | 297 // Used to flip a bitmap vertically. |
| 300 Vector<uint8_t> m_scanline; | 298 Vector<uint8_t> m_scanline; |
| 301 }; | 299 }; |
| 302 | 300 |
| 303 } // namespace blink | 301 } // namespace blink |
| 304 | 302 |
| 305 #endif // DrawingBuffer_h | 303 #endif // DrawingBuffer_h |
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