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flutter_flutter/engine/core/html/canvas/WebGLRenderingContextBase.h
Eric Seidel 295f920116 Fix sky include guards to match Chromium style 
I wrote a script to do this which is attached
to the bug.

TBR=abarth@chromium.org
BUG=435361

Review URL: https://codereview.chromium.org/736373003
2014-11-21 02:48:38 -08:00

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/*
* Copyright (C) 2009 Apple 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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 SKY_ENGINE_CORE_HTML_CANVAS_WEBGLRENDERINGCONTEXTBASE_H_
#define SKY_ENGINE_CORE_HTML_CANVAS_WEBGLRENDERINGCONTEXTBASE_H_
#include "sky/engine/bindings/core/v8/Nullable.h"
#include "sky/engine/core/dom/ActiveDOMObject.h"
#include "sky/engine/core/html/canvas/CanvasRenderingContext.h"
#include "sky/engine/core/html/canvas/WebGLExtensionName.h"
#include "sky/engine/core/html/canvas/WebGLGetInfo.h"
#include "sky/engine/core/page/Page.h"
#include "sky/engine/core/rendering/RenderBoxModelObject.h"
#include "sky/engine/platform/Timer.h"
#include "sky/engine/platform/graphics/GraphicsTypes3D.h"
#include "sky/engine/platform/graphics/ImageBuffer.h"
#include "sky/engine/platform/graphics/gpu/DrawingBuffer.h"
#include "sky/engine/platform/graphics/gpu/Extensions3DUtil.h"
#include "sky/engine/platform/graphics/gpu/WebGLImageConversion.h"
#include "sky/engine/public/platform/WebGraphicsContext3D.h"
#include "sky/engine/wtf/Float32Array.h"
#include "sky/engine/wtf/Int32Array.h"
#include "sky/engine/wtf/OwnPtr.h"
#include "sky/engine/wtf/text/WTFString.h"
namespace blink {
class WebLayer;
}
namespace blink {
class ANGLEInstancedArrays;
class EXTBlendMinMax;
class EXTFragDepth;
class EXTShaderTextureLOD;
class EXTTextureFilterAnisotropic;
class ExceptionState;
class HTMLImageElement;
class ImageBuffer;
class ImageData;
class IntSize;
class OESElementIndexUint;
class OESStandardDerivatives;
class OESTextureFloat;
class OESTextureFloatLinear;
class OESTextureHalfFloat;
class OESTextureHalfFloatLinear;
class OESVertexArrayObject;
class WebGLActiveInfo;
class WebGLBuffer;
class WebGLCompressedTextureATC;
class WebGLCompressedTextureETC1;
class WebGLCompressedTexturePVRTC;
class WebGLCompressedTextureS3TC;
class WebGLContextAttributes;
class WebGLContextGroup;
class WebGLContextObject;
class WebGLDebugRendererInfo;
class WebGLDebugShaders;
class WebGLDepthTexture;
class WebGLDrawBuffers;
class WebGLExtension;
class WebGLFramebuffer;
class WebGLLoseContext;
class WebGLObject;
class WebGLProgram;
class WebGLRenderbuffer;
class WebGLShader;
class WebGLShaderPrecisionFormat;
class WebGLSharedObject;
class WebGLSharedWebGraphicsContext3D;
class WebGLTexture;
class WebGLUniformLocation;
class WebGLVertexArrayObjectOES;
class WebGLRenderingContextLostCallback;
class WebGLRenderingContextErrorMessageCallback;
class WebGLRenderingContextBase: public CanvasRenderingContext, public ActiveDOMObject, public Page::MultisamplingChangedObserver {
public:
virtual ~WebGLRenderingContextBase();
virtual unsigned version() const = 0;
virtual String contextName() const = 0;
virtual void registerContextExtensions() = 0;
static unsigned getWebGLVersion(const CanvasRenderingContext*);
int drawingBufferWidth() const;
int drawingBufferHeight() const;
void activeTexture(GLenum texture);
void attachShader(WebGLProgram*, WebGLShader*);
void bindAttribLocation(WebGLProgram*, GLuint index, const String& name);
void bindBuffer(GLenum target, WebGLBuffer*);
void bindFramebuffer(GLenum target, WebGLFramebuffer*);
void bindRenderbuffer(GLenum target, WebGLRenderbuffer*);
void bindTexture(GLenum target, WebGLTexture*);
void blendColor(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
void blendEquation(GLenum mode);
void blendEquationSeparate(GLenum modeRGB, GLenum modeAlpha);
void blendFunc(GLenum sfactor, GLenum dfactor);
void blendFuncSeparate(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
void bufferData(GLenum target, long long size, GLenum usage);
void bufferData(GLenum target, ArrayBuffer* data, GLenum usage);
void bufferData(GLenum target, ArrayBufferView* data, GLenum usage);
void bufferSubData(GLenum target, long long offset, ArrayBuffer* data);
void bufferSubData(GLenum target, long long offset, ArrayBufferView* data);
GLenum checkFramebufferStatus(GLenum target);
void clear(GLbitfield mask);
void clearColor(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
void clearDepth(GLfloat);
void clearStencil(GLint);
void colorMask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
void compileShader(WebGLShader*);
void compressedTexImage2D(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, ArrayBufferView* data);
void compressedTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, ArrayBufferView* data);
void copyTexImage2D(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
void copyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
PassRefPtr<WebGLBuffer> createBuffer();
PassRefPtr<WebGLFramebuffer> createFramebuffer();
PassRefPtr<WebGLProgram> createProgram();
PassRefPtr<WebGLRenderbuffer> createRenderbuffer();
PassRefPtr<WebGLShader> createShader(GLenum type);
PassRefPtr<WebGLTexture> createTexture();
void cullFace(GLenum mode);
void deleteBuffer(WebGLBuffer*);
void deleteFramebuffer(WebGLFramebuffer*);
void deleteProgram(WebGLProgram*);
void deleteRenderbuffer(WebGLRenderbuffer*);
void deleteShader(WebGLShader*);
void deleteTexture(WebGLTexture*);
void depthFunc(GLenum);
void depthMask(GLboolean);
void depthRange(GLfloat zNear, GLfloat zFar);
void detachShader(WebGLProgram*, WebGLShader*);
void disable(GLenum cap);
void disableVertexAttribArray(GLuint index);
void drawArrays(GLenum mode, GLint first, GLsizei count);
void drawElements(GLenum mode, GLsizei count, GLenum type, long long offset);
void drawArraysInstancedANGLE(GLenum mode, GLint first, GLsizei count, GLsizei primcount);
void drawElementsInstancedANGLE(GLenum mode, GLsizei count, GLenum type, long long offset, GLsizei primcount);
void enable(GLenum cap);
void enableVertexAttribArray(GLuint index);
void finish();
void flush();
void framebufferRenderbuffer(GLenum target, GLenum attachment, GLenum renderbuffertarget, WebGLRenderbuffer*);
void framebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget, WebGLTexture*, GLint level);
void frontFace(GLenum mode);
void generateMipmap(GLenum target);
PassRefPtr<WebGLActiveInfo> getActiveAttrib(WebGLProgram*, GLuint index);
PassRefPtr<WebGLActiveInfo> getActiveUniform(WebGLProgram*, GLuint index);
bool getAttachedShaders(WebGLProgram*, Vector<RefPtr<WebGLShader> >&);
Nullable<Vector<RefPtr<WebGLShader> > > getAttachedShaders(WebGLProgram*);
GLint getAttribLocation(WebGLProgram*, const String& name);
WebGLGetInfo getBufferParameter(GLenum target, GLenum pname);
PassRefPtr<WebGLContextAttributes> getContextAttributes();
GLenum getError();
PassRefPtr<WebGLExtension> getExtension(const String& name);
WebGLGetInfo getFramebufferAttachmentParameter(GLenum target, GLenum attachment, GLenum pname);
WebGLGetInfo getParameter(GLenum pname);
WebGLGetInfo getProgramParameter(WebGLProgram*, GLenum pname);
String getProgramInfoLog(WebGLProgram*);
WebGLGetInfo getRenderbufferParameter(GLenum target, GLenum pname);
WebGLGetInfo getShaderParameter(WebGLShader*, GLenum pname);
String getShaderInfoLog(WebGLShader*);
PassRefPtr<WebGLShaderPrecisionFormat> getShaderPrecisionFormat(GLenum shaderType, GLenum precisionType);
String getShaderSource(WebGLShader*);
Nullable<Vector<String> > getSupportedExtensions();
WebGLGetInfo getTexParameter(GLenum target, GLenum pname);
WebGLGetInfo getUniform(WebGLProgram*, const WebGLUniformLocation*);
PassRefPtr<WebGLUniformLocation> getUniformLocation(WebGLProgram*, const String&);
WebGLGetInfo getVertexAttrib(GLuint index, GLenum pname);
long long getVertexAttribOffset(GLuint index, GLenum pname);
void hint(GLenum target, GLenum mode);
GLboolean isBuffer(WebGLBuffer*);
bool isContextLost() const;
GLboolean isEnabled(GLenum cap);
GLboolean isFramebuffer(WebGLFramebuffer*);
GLboolean isProgram(WebGLProgram*);
GLboolean isRenderbuffer(WebGLRenderbuffer*);
GLboolean isShader(WebGLShader*);
GLboolean isTexture(WebGLTexture*);
void lineWidth(GLfloat);
void linkProgram(WebGLProgram*);
void pixelStorei(GLenum pname, GLint param);
void polygonOffset(GLfloat factor, GLfloat units);
void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, ArrayBufferView* pixels);
void renderbufferStorage(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
void sampleCoverage(GLfloat value, GLboolean invert);
void scissor(GLint x, GLint y, GLsizei width, GLsizei height);
void shaderSource(WebGLShader*, const String&);
void stencilFunc(GLenum func, GLint ref, GLuint mask);
void stencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask);
void stencilMask(GLuint);
void stencilMaskSeparate(GLenum face, GLuint mask);
void stencilOp(GLenum fail, GLenum zfail, GLenum zpass);
void stencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass);
void texImage2D(GLenum target, GLint level, GLenum internalformat,
GLsizei width, GLsizei height, GLint border,
GLenum format, GLenum type, ArrayBufferView*, ExceptionState&);
void texImage2D(GLenum target, GLint level, GLenum internalformat,
GLenum format, GLenum type, ImageData*, ExceptionState&);
void texImage2D(GLenum target, GLint level, GLenum internalformat,
GLenum format, GLenum type, HTMLImageElement*, ExceptionState&);
void texImage2D(GLenum target, GLint level, GLenum internalformat,
GLenum format, GLenum type, HTMLCanvasElement*, ExceptionState&);
void texParameterf(GLenum target, GLenum pname, GLfloat param);
void texParameteri(GLenum target, GLenum pname, GLint param);
void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height,
GLenum format, GLenum type, ArrayBufferView*, ExceptionState&);
void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
GLenum format, GLenum type, ImageData*, ExceptionState&);
void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
GLenum format, GLenum type, HTMLImageElement*, ExceptionState&);
void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
GLenum format, GLenum type, HTMLCanvasElement*, ExceptionState&);
void uniform1f(const WebGLUniformLocation*, GLfloat x);
void uniform1fv(const WebGLUniformLocation*, Float32Array* v);
void uniform1fv(const WebGLUniformLocation*, GLfloat* v, GLsizei);
void uniform1i(const WebGLUniformLocation*, GLint x);
void uniform1iv(const WebGLUniformLocation*, Int32Array* v);
void uniform1iv(const WebGLUniformLocation*, GLint* v, GLsizei);
void uniform2f(const WebGLUniformLocation*, GLfloat x, GLfloat y);
void uniform2fv(const WebGLUniformLocation*, Float32Array* v);
void uniform2fv(const WebGLUniformLocation*, GLfloat* v, GLsizei);
void uniform2i(const WebGLUniformLocation*, GLint x, GLint y);
void uniform2iv(const WebGLUniformLocation*, Int32Array* v);
void uniform2iv(const WebGLUniformLocation*, GLint* v, GLsizei);
void uniform3f(const WebGLUniformLocation*, GLfloat x, GLfloat y, GLfloat z);
void uniform3fv(const WebGLUniformLocation*, Float32Array* v);
void uniform3fv(const WebGLUniformLocation*, GLfloat* v, GLsizei);
void uniform3i(const WebGLUniformLocation*, GLint x, GLint y, GLint z);
void uniform3iv(const WebGLUniformLocation*, Int32Array* v);
void uniform3iv(const WebGLUniformLocation*, GLint* v, GLsizei);
void uniform4f(const WebGLUniformLocation*, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
void uniform4fv(const WebGLUniformLocation*, Float32Array* v);
void uniform4fv(const WebGLUniformLocation*, GLfloat* v, GLsizei);
void uniform4i(const WebGLUniformLocation*, GLint x, GLint y, GLint z, GLint w);
void uniform4iv(const WebGLUniformLocation*, Int32Array* v);
void uniform4iv(const WebGLUniformLocation*, GLint* v, GLsizei);
void uniformMatrix2fv(const WebGLUniformLocation*, GLboolean transpose, Float32Array* value);
void uniformMatrix2fv(const WebGLUniformLocation*, GLboolean transpose, GLfloat* value, GLsizei);
void uniformMatrix3fv(const WebGLUniformLocation*, GLboolean transpose, Float32Array* value);
void uniformMatrix3fv(const WebGLUniformLocation*, GLboolean transpose, GLfloat* value, GLsizei);
void uniformMatrix4fv(const WebGLUniformLocation*, GLboolean transpose, Float32Array* value);
void uniformMatrix4fv(const WebGLUniformLocation*, GLboolean transpose, GLfloat* value, GLsizei);
void useProgram(WebGLProgram*);
void validateProgram(WebGLProgram*);
void vertexAttrib1f(GLuint index, GLfloat x);
void vertexAttrib1fv(GLuint index, Float32Array* values);
void vertexAttrib1fv(GLuint index, GLfloat* values, GLsizei);
void vertexAttrib2f(GLuint index, GLfloat x, GLfloat y);
void vertexAttrib2fv(GLuint index, Float32Array* values);
void vertexAttrib2fv(GLuint index, GLfloat* values, GLsizei);
void vertexAttrib3f(GLuint index, GLfloat x, GLfloat y, GLfloat z);
void vertexAttrib3fv(GLuint index, Float32Array* values);
void vertexAttrib3fv(GLuint index, GLfloat* values, GLsizei);
void vertexAttrib4f(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
void vertexAttrib4fv(GLuint index, Float32Array* values);
void vertexAttrib4fv(GLuint index, GLfloat* values, GLsizei);
void vertexAttribPointer(GLuint index, GLint size, GLenum type, GLboolean normalized,
GLsizei stride, long long offset);
void vertexAttribDivisorANGLE(GLuint index, GLuint divisor);
void viewport(GLint x, GLint y, GLsizei width, GLsizei height);
// WEBGL_lose_context support
enum LostContextMode {
NotLostContext,
// Lost context occurred at the graphics system level.
RealLostContext,
// Lost context provoked by WEBGL_lose_context.
WebGLLoseContextLostContext,
// Lost context occurred due to internal implementation reasons.
SyntheticLostContext,
};
enum AutoRecoveryMethod {
// Don't restore automatically.
Manual,
// Restore when resources are available.
WhenAvailable,
// Restore as soon as possible.
Auto
};
void forceLostContext(LostContextMode, AutoRecoveryMethod);
void forceRestoreContext();
void loseContextImpl(LostContextMode, AutoRecoveryMethod);
blink::WebGraphicsContext3D* webContext() const { return drawingBuffer()->context(); }
WebGLContextGroup* contextGroup() const { return m_contextGroup.get(); }
Extensions3DUtil* extensionsUtil();
void reshape(int width, int height);
void markLayerComposited();
PassRefPtr<ImageData> paintRenderingResultsToImageData();
void removeSharedObject(WebGLSharedObject*);
void removeContextObject(WebGLContextObject*);
unsigned maxVertexAttribs() const { return m_maxVertexAttribs; }
// ActiveDOMObject notifications
virtual bool hasPendingActivity() const override;
virtual void stop() override;
void setSavingImage(bool isSaving) { m_savingImage = isSaving; }
class TextureUnitState {
ALLOW_ONLY_INLINE_ALLOCATION();
public:
RefPtr<WebGLTexture> m_texture2DBinding;
RefPtr<WebGLTexture> m_textureCubeMapBinding;
};
protected:
friend class WebGLDrawBuffers;
friend class WebGLFramebuffer;
friend class WebGLObject;
friend class WebGLContextObject;
friend class OESVertexArrayObject;
friend class WebGLDebugShaders;
friend class WebGLCompressedTextureATC;
friend class WebGLCompressedTextureETC1;
friend class WebGLCompressedTexturePVRTC;
friend class WebGLCompressedTextureS3TC;
friend class WebGLRenderingContextErrorMessageCallback;
friend class WebGLVertexArrayObjectOES;
friend class ScopedTexture2DRestorer;
WebGLRenderingContextBase(HTMLCanvasElement*, PassOwnPtr<blink::WebGraphicsContext3D>, WebGLContextAttributes*);
PassRefPtr<DrawingBuffer> createDrawingBuffer(PassOwnPtr<blink::WebGraphicsContext3D>);
void initializeNewContext();
void setupFlags();
#if ENABLE(OILPAN)
PassRefPtr<WebGLSharedWebGraphicsContext3D> sharedWebGraphicsContext3D() const;
#endif
// CanvasRenderingContext implementation.
virtual bool is3d() const override { return true; }
virtual bool isAccelerated() const override { return true; }
virtual void setIsHidden(bool) override;
virtual void paintRenderingResultsToCanvas() override;
virtual blink::WebLayer* platformLayer() const override;
void addSharedObject(WebGLSharedObject*);
void addContextObject(WebGLContextObject*);
void detachAndRemoveAllObjects();
void destroyContext();
void markContextChanged(ContentChangeType);
// Query if the GL implementation is NPOT strict.
bool isGLES2NPOTStrict() { return m_isGLES2NPOTStrict; }
// Query if depth_stencil buffer is supported.
bool isDepthStencilSupported() { return m_isDepthStencilSupported; }
// Helper to return the size in bytes of OpenGL data types
// like GL_FLOAT, GL_INT, etc.
unsigned sizeInBytes(GLenum type);
// Check if each enabled vertex attribute is bound to a buffer.
bool validateRenderingState(const char*);
bool validateWebGLObject(const char*, WebGLObject*);
// Adds a compressed texture format.
void addCompressedTextureFormat(GLenum);
void removeAllCompressedTextureFormats();
PassRefPtr<Image> drawImageIntoBuffer(Image*, int width, int height, const char* functionName);
WebGLRenderbuffer* ensureEmulatedStencilBuffer(GLenum target, WebGLRenderbuffer*);
// Structure for rendering to a DrawingBuffer, instead of directly
// to the back-buffer of m_context.
#if ENABLE(OILPAN)
RefPtr<WebGLSharedWebGraphicsContext3D> m_sharedWebGraphicsContext3D;
#else
RefPtr<DrawingBuffer> m_drawingBuffer;
#endif
DrawingBuffer* drawingBuffer() const;
RefPtr<WebGLContextGroup> m_contextGroup;
LostContextMode m_contextLostMode;
AutoRecoveryMethod m_autoRecoveryMethod;
// Dispatches a context lost event once it is determined that one is needed.
// This is used for synthetic, WEBGL_lose_context and real context losses. For real ones, it's
// likely that there's no JavaScript on the stack, but that might be dependent
// on how exactly the platform discovers that the context was lost. For better
// portability we always defer the dispatch of the event.
Timer<WebGLRenderingContextBase> m_dispatchContextLostEventTimer;
bool m_restoreAllowed;
Timer<WebGLRenderingContextBase> m_restoreTimer;
bool m_needsUpdate;
bool m_markedCanvasDirty;
HashSet<RawPtr<WebGLContextObject> > m_contextObjects;
OwnPtr<WebGLRenderingContextLostCallback> m_contextLostCallbackAdapter;
OwnPtr<WebGLRenderingContextErrorMessageCallback> m_errorMessageCallbackAdapter;
// List of bound VBO's. Used to maintain info about sizes for ARRAY_BUFFER and stored values for ELEMENT_ARRAY_BUFFER
RefPtr<WebGLBuffer> m_boundArrayBuffer;
RefPtr<WebGLVertexArrayObjectOES> m_defaultVertexArrayObject;
RefPtr<WebGLVertexArrayObjectOES> m_boundVertexArrayObject;
void setBoundVertexArrayObject(PassRefPtr<WebGLVertexArrayObjectOES> arrayObject)
{
if (arrayObject)
m_boundVertexArrayObject = arrayObject;
else
m_boundVertexArrayObject = m_defaultVertexArrayObject;
}
class VertexAttribValue {
public:
VertexAttribValue()
{
initValue();
}
void initValue()
{
value[0] = 0.0f;
value[1] = 0.0f;
value[2] = 0.0f;
value[3] = 1.0f;
}
GLfloat value[4];
};
Vector<VertexAttribValue> m_vertexAttribValue;
unsigned m_maxVertexAttribs;
RefPtr<WebGLBuffer> m_vertexAttrib0Buffer;
long m_vertexAttrib0BufferSize;
GLfloat m_vertexAttrib0BufferValue[4];
bool m_forceAttrib0BufferRefill;
bool m_vertexAttrib0UsedBefore;
RefPtr<WebGLProgram> m_currentProgram;
RefPtr<WebGLFramebuffer> m_framebufferBinding;
RefPtr<WebGLRenderbuffer> m_renderbufferBinding;
Vector<TextureUnitState> m_textureUnits;
unsigned long m_activeTextureUnit;
RefPtr<WebGLTexture> m_blackTexture2D;
RefPtr<WebGLTexture> m_blackTextureCubeMap;
Vector<GLenum> m_compressedTextureFormats;
// Fixed-size cache of reusable image buffers for video texImage2D calls.
class LRUImageBufferCache {
public:
LRUImageBufferCache(int capacity);
// The pointer returned is owned by the image buffer map.
ImageBuffer* imageBuffer(const IntSize& size);
private:
void bubbleToFront(int idx);
OwnPtr<OwnPtr<ImageBuffer>[]> m_buffers;
int m_capacity;
};
LRUImageBufferCache m_generatedImageCache;
GLint m_maxTextureSize;
GLint m_maxCubeMapTextureSize;
GLint m_maxRenderbufferSize;
GLint m_maxViewportDims[2];
GLint m_maxTextureLevel;
GLint m_maxCubeMapTextureLevel;
GLint m_maxDrawBuffers;
GLint m_maxColorAttachments;
GLenum m_backDrawBuffer;
bool m_drawBuffersWebGLRequirementsChecked;
bool m_drawBuffersSupported;
GLint m_packAlignment;
GLint m_unpackAlignment;
bool m_unpackFlipY;
bool m_unpackPremultiplyAlpha;
GLenum m_unpackColorspaceConversion;
RefPtr<WebGLContextAttributes> m_requestedAttributes;
bool m_layerCleared;
GLfloat m_clearColor[4];
bool m_scissorEnabled;
GLfloat m_clearDepth;
GLint m_clearStencil;
GLboolean m_colorMask[4];
GLboolean m_depthMask;
bool m_stencilEnabled;
GLuint m_stencilMask, m_stencilMaskBack;
GLint m_stencilFuncRef, m_stencilFuncRefBack; // Note that these are the user specified values, not the internal clamped value.
GLuint m_stencilFuncMask, m_stencilFuncMaskBack;
bool m_isGLES2NPOTStrict;
bool m_isDepthStencilSupported;
bool m_synthesizedErrorsToConsole;
int m_numGLErrorsToConsoleAllowed;
bool m_multisamplingAllowed;
bool m_multisamplingObserverRegistered;
unsigned long m_onePlusMaxNonDefaultTextureUnit;
OwnPtr<Extensions3DUtil> m_extensionsUtil;
bool m_savingImage;
enum ExtensionFlags {
ApprovedExtension = 0x00,
// Extension that is behind the draft extensions runtime flag:
DraftExtension = 0x01,
};
class ExtensionTracker {
public:
ExtensionTracker(ExtensionFlags flags, const char* const* prefixes)
: m_draft(flags & DraftExtension)
, m_prefixes(prefixes)
{
}
#if !ENABLE(OILPAN)
virtual ~ExtensionTracker()
{
}
#endif
bool draft() const
{
return m_draft;
}
const char* const* prefixes() const;
bool matchesNameWithPrefixes(const String&) const;
virtual PassRefPtr<WebGLExtension> getExtension(WebGLRenderingContextBase*) = 0;
virtual bool supported(WebGLRenderingContextBase*) const = 0;
virtual const char* extensionName() const = 0;
virtual void loseExtension() = 0;
private:
bool m_draft;
const char* const* m_prefixes;
};
template <typename T>
class TypedExtensionTracker final : public ExtensionTracker {
public:
static PassOwnPtr<TypedExtensionTracker<T> > create(RefPtr<T>& extensionField, ExtensionFlags flags, const char* const* prefixes)
{
return adoptPtr(new TypedExtensionTracker<T>(extensionField, flags, prefixes));
}
#if !ENABLE(OILPAN)
virtual ~TypedExtensionTracker()
{
if (m_extension) {
m_extension->lose(true);
m_extension = nullptr;
}
}
#endif
virtual PassRefPtr<WebGLExtension> getExtension(WebGLRenderingContextBase* context) override
{
if (!m_extension) {
m_extension = T::create(context);
m_extensionField = m_extension;
}
return m_extension;
}
virtual bool supported(WebGLRenderingContextBase* context) const override
{
return T::supported(context);
}
virtual const char* extensionName() const override
{
return T::extensionName();
}
virtual void loseExtension() override
{
if (m_extension) {
m_extension->lose(false);
if (m_extension->isLost())
m_extension = nullptr;
}
}
private:
TypedExtensionTracker(RefPtr<T>& extensionField, ExtensionFlags flags, const char* const* prefixes)
: ExtensionTracker(flags, prefixes)
, m_extensionField(extensionField)
{
}
RefPtr<T>& m_extensionField;
// ExtensionTracker holds it's own reference to the extension to ensure
// that it is not deleted before this object's destructor is called
RefPtr<T> m_extension;
};
bool m_extensionEnabled[WebGLExtensionNameCount];
Vector<OwnPtr<ExtensionTracker> > m_extensions;
template <typename T>
void registerExtension(RefPtr<T>& extensionPtr, ExtensionFlags flags = ApprovedExtension, const char* const* prefixes = 0)
{
m_extensions.append(TypedExtensionTracker<T>::create(extensionPtr, flags, prefixes));
}
bool extensionSupportedAndAllowed(const ExtensionTracker*);
inline bool extensionEnabled(WebGLExtensionName name)
{
return m_extensionEnabled[name];
}
// Errors raised by synthesizeGLError() while the context is lost.
Vector<GLenum> m_lostContextErrors;
// Helpers for getParameter and others
WebGLGetInfo getBooleanParameter(GLenum);
WebGLGetInfo getBooleanArrayParameter(GLenum);
WebGLGetInfo getFloatParameter(GLenum);
WebGLGetInfo getIntParameter(GLenum);
WebGLGetInfo getUnsignedIntParameter(GLenum);
WebGLGetInfo getWebGLFloatArrayParameter(GLenum);
WebGLGetInfo getWebGLIntArrayParameter(GLenum);
// Clear the backbuffer if it was composited since the last operation.
// clearMask is set to the bitfield of any clear that would happen anyway at this time
// and the function returns true if that clear is now unnecessary.
bool clearIfComposited(GLbitfield clearMask = 0);
// Helper to restore state that clearing the framebuffer may destroy.
void restoreStateAfterClear();
// Convert texture internal format.
GLenum convertTexInternalFormat(GLenum internalformat, GLenum type);
void texImage2DBase(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const void* pixels, ExceptionState&);
void texImage2DImpl(GLenum target, GLint level, GLenum internalformat, GLenum format, GLenum type, Image*, WebGLImageConversion::ImageHtmlDomSource, bool flipY, bool premultiplyAlpha, ExceptionState&);
void texSubImage2DBase(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void* pixels, ExceptionState&);
void texSubImage2DImpl(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLenum format, GLenum type, Image*, WebGLImageConversion::ImageHtmlDomSource, bool flipY, bool premultiplyAlpha, ExceptionState&);
void handleTextureCompleteness(const char*, bool);
void createFallbackBlackTextures1x1();
// Helper function for copyTex{Sub}Image, check whether the internalformat
// and the color buffer format of the current bound framebuffer combination
// is valid.
bool isTexInternalFormatColorBufferCombinationValid(GLenum texInternalFormat, GLenum colorBufferFormat);
// Helper function to get the bound framebuffer's color buffer format.
GLenum boundFramebufferColorFormat();
// Helper function to verify limits on the length of uniform and attribute locations.
bool validateLocationLength(const char* functionName, const String&);
// Helper function to check if size is non-negative.
// Generate GL error and return false for negative inputs; otherwise, return true.
bool validateSize(const char* functionName, GLint x, GLint y);
// Helper function to check if all characters in the string belong to the
// ASCII subset as defined in GLSL ES 1.0 spec section 3.1.
bool validateString(const char* functionName, const String&);
// Helper function to check target and texture bound to the target.
// Generate GL errors and return 0 if target is invalid or texture bound is
// null. Otherwise, return the texture bound to the target.
WebGLTexture* validateTextureBinding(const char* functionName, GLenum target, bool useSixEnumsForCubeMap);
// Helper function to check input format/type for functions {copy}Tex{Sub}Image.
// Generates GL error and returns false if parameters are invalid.
bool validateTexFuncFormatAndType(const char* functionName, GLenum format, GLenum type, GLint level);
// Helper function to check input level for functions {copy}Tex{Sub}Image.
// Generates GL error and returns false if level is invalid.
bool validateTexFuncLevel(const char* functionName, GLenum target, GLint level);
// Helper function to check if a 64-bit value is non-negative and can fit into a 32-bit integer.
// Generates GL error and returns false if not.
bool validateValueFitNonNegInt32(const char* functionName, const char* paramName, long long value);
enum TexFuncValidationFunctionType {
NotTexSubImage2D,
TexSubImage2D,
};
enum TexFuncValidationSourceType {
SourceArrayBufferView,
SourceImageData,
SourceHTMLImageElement,
SourceHTMLCanvasElement,
};
// Helper function for tex{Sub}Image2D to check if the input format/type/level/target/width/height/border/xoffset/yoffset are valid.
// Otherwise, it would return quickly without doing other work.
bool validateTexFunc(const char* functionName, TexFuncValidationFunctionType, TexFuncValidationSourceType, GLenum target, GLint level, GLenum internalformat, GLsizei width,
GLsizei height, GLint border, GLenum format, GLenum type, GLint xoffset, GLint yoffset);
// Helper function to check input width and height for functions {copy, compressed}Tex{Sub}Image.
// Generates GL error and returns false if width or height is invalid.
bool validateTexFuncDimensions(const char* functionName, TexFuncValidationFunctionType, GLenum target, GLint level, GLsizei width, GLsizei height);
// Helper function to check input parameters for functions {copy}Tex{Sub}Image.
// Generates GL error and returns false if parameters are invalid.
bool validateTexFuncParameters(const char* functionName, TexFuncValidationFunctionType, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type);
enum NullDisposition {
NullAllowed,
NullNotAllowed
};
// Helper function to validate that the given ArrayBufferView
// is of the correct type and contains enough data for the texImage call.
// Generates GL error and returns false if parameters are invalid.
bool validateTexFuncData(const char* functionName, GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, ArrayBufferView* pixels, NullDisposition);
// Helper function to validate a given texture format is settable as in
// you can supply data to texImage2D, or call texImage2D, copyTexImage2D and
// copyTexSubImage2D.
// Generates GL error and returns false if the format is not settable.
bool validateSettableTexFormat(const char* functionName, GLenum format);
// Helper function to validate compressed texture data is correct size
// for the given format and dimensions.
bool validateCompressedTexFuncData(const char* functionName, GLsizei width, GLsizei height, GLenum format, ArrayBufferView* pixels);
// Helper function for validating compressed texture formats.
bool validateCompressedTexFormat(GLenum format);
// Helper function to validate compressed texture dimensions are valid for
// the given format.
bool validateCompressedTexDimensions(const char* functionName, TexFuncValidationFunctionType, GLenum target, GLint level, GLsizei width, GLsizei height, GLenum format);
// Helper function to validate compressed texture dimensions are valid for
// the given format.
bool validateCompressedTexSubDimensions(const char* functionName, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, WebGLTexture*);
// Helper function to validate mode for draw{Arrays/Elements}.
bool validateDrawMode(const char* functionName, GLenum);
// Helper function to validate if front/back stencilMask and stencilFunc settings are the same.
bool validateStencilSettings(const char* functionName);
// Helper function to validate stencil or depth func.
bool validateStencilOrDepthFunc(const char* functionName, GLenum);
// Helper function for texParameterf and texParameteri.
void texParameter(GLenum target, GLenum pname, GLfloat parami, GLint paramf, bool isFloat);
// Helper function to print GL errors to console.
void printGLErrorToConsole(const String&);
// Helper function to print warnings to console. Currently
// used only to warn about use of obsolete functions.
void printWarningToConsole(const String&);
// Helper function to validate input parameters for framebuffer functions.
// Generate GL error if parameters are illegal.
bool validateFramebufferFuncParameters(const char* functionName, GLenum target, GLenum attachment);
// Helper function to validate blend equation mode.
bool validateBlendEquation(const char* functionName, GLenum);
// Helper function to validate blend func factors.
bool validateBlendFuncFactors(const char* functionName, GLenum src, GLenum dst);
// Helper function to validate a GL capability.
bool validateCapability(const char* functionName, GLenum);
// Helper function to validate input parameters for uniform functions.
bool validateUniformParameters(const char* functionName, const WebGLUniformLocation*, Float32Array*, GLsizei mod);
bool validateUniformParameters(const char* functionName, const WebGLUniformLocation*, Int32Array*, GLsizei mod);
bool validateUniformParameters(const char* functionName, const WebGLUniformLocation*, void*, GLsizei, GLsizei mod);
bool validateUniformMatrixParameters(const char* functionName, const WebGLUniformLocation*, GLboolean transpose, Float32Array*, GLsizei mod);
bool validateUniformMatrixParameters(const char* functionName, const WebGLUniformLocation*, GLboolean transpose, void*, GLsizei, GLsizei mod);
// Helper function to validate the target for bufferData.
// Return the current bound buffer to target, or 0 if the target is invalid.
WebGLBuffer* validateBufferDataTarget(const char* functionName, GLenum target);
// Helper function for tex{Sub}Image2D to make sure image is ready and wouldn't taint Origin.
bool validateHTMLImageElement(const char* functionName, HTMLImageElement*, ExceptionState&);
// Helper function for tex{Sub}Image2D to make sure canvas is ready and wouldn't taint Origin.
bool validateHTMLCanvasElement(const char* functionName, HTMLCanvasElement*, ExceptionState&);
// Helper function to validate drawArrays(Instanced) calls
bool validateDrawArrays(const char* functionName, GLenum mode, GLint first, GLsizei count);
// Helper function to validate drawElements(Instanced) calls
bool validateDrawElements(const char* functionName, GLenum mode, GLsizei count, GLenum type, long long offset);
// Helper function to validate draw*Instanced calls
bool validateDrawInstanced(const char* functionName, GLsizei primcount);
// Helper functions for vertexAttribNf{v}.
void vertexAttribfImpl(const char* functionName, GLuint index, GLsizei expectedSize, GLfloat, GLfloat, GLfloat, GLfloat);
void vertexAttribfvImpl(const char* functionName, GLuint index, Float32Array*, GLsizei expectedSize);
void vertexAttribfvImpl(const char* functionName, GLuint index, GLfloat*, GLsizei, GLsizei expectedSize);
// Helper functions to bufferData() and bufferSubData().
void bufferDataImpl(GLenum target, long long size, const void* data, GLenum usage);
void bufferSubDataImpl(GLenum target, long long offset, GLsizeiptr size, const void* data);
// Helper function for delete* (deleteBuffer, deleteProgram, etc) functions.
// Return false if caller should return without further processing.
bool deleteObject(WebGLObject*);
// Helper function for bind* (bindBuffer, bindTexture, etc) and useProgram.
// If the object has already been deleted, set deleted to true upon return.
// Return false if caller should return without further processing.
bool checkObjectToBeBound(const char* functionName, WebGLObject*, bool& deleted);
void dispatchContextLostEvent(Timer<WebGLRenderingContextBase>*);
// Helper for restoration after context lost.
void maybeRestoreContext(Timer<WebGLRenderingContextBase>*);
enum ConsoleDisplayPreference {
DisplayInConsole,
DontDisplayInConsole
};
// Wrapper for WebGraphicsContext3D::synthesizeGLError that sends a message
// to the JavaScript console.
void synthesizeGLError(GLenum, const char* functionName, const char* description, ConsoleDisplayPreference = DisplayInConsole);
void emitGLWarning(const char* function, const char* reason);
String ensureNotNull(const String&) const;
// Enable or disable stencil test based on user setting and
// whether the current FBO has a stencil buffer.
void applyStencilTest();
// Helper for enabling or disabling a capability.
void enableOrDisable(GLenum capability, bool enable);
// Clamp the width and height to GL_MAX_VIEWPORT_DIMS.
IntSize clampedCanvasSize();
// First time called, if EXT_draw_buffers is supported, query the value; otherwise return 0.
// Later, return the cached value.
GLint maxDrawBuffers();
GLint maxColorAttachments();
void setBackDrawBuffer(GLenum);
void restoreCurrentFramebuffer();
void restoreCurrentTexture2D();
virtual void multisamplingChanged(bool) override;
void findNewMaxNonDefaultTextureUnit();
friend class WebGLStateRestorer;
friend class WebGLRenderingContextEvictionManager;
static Vector<WebGLRenderingContextBase*>& activeContexts();
static Vector<WebGLRenderingContextBase*>& forciblyEvictedContexts();
static void activateContext(WebGLRenderingContextBase*);
static void deactivateContext(WebGLRenderingContextBase*);
static void addToEvictedList(WebGLRenderingContextBase*);
static void removeFromEvictedList(WebGLRenderingContextBase*);
static void willDestroyContext(WebGLRenderingContextBase*);
static void forciblyLoseOldestContext(const String& reason);
// Return the least recently used context's position in the active context vector.
// If the vector is empty, return the maximum allowed active context number.
static size_t oldestContextIndex();
static IntSize oldestContextSize();
};
DEFINE_TYPE_CASTS(WebGLRenderingContextBase, CanvasRenderingContext, context, context->is3d(), context.is3d());
} // namespace blink
WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::WebGLRenderingContextBase::TextureUnitState);
#endif // SKY_ENGINE_CORE_HTML_CANVAS_WEBGLRENDERINGCONTEXTBASE_H_
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