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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 WebGLRenderingContextBase_h
#define WebGLRenderingContextBase_h
#include "bindings/core/v8/Nullable.h"
#include "bindings/core/v8/ScriptState.h"
#include "bindings/core/v8/ScriptValue.h"
#include "bindings/core/v8/ScriptWrappable.h"
#include "bindings/core/v8/ScriptWrappableVisitor.h"
#include "core/CoreExport.h"
#include "core/dom/DOMTypedArray.h"
#include "core/dom/TypedFlexibleArrayBufferView.h"
#include "core/html/canvas/CanvasContextCreationAttributes.h"
#include "core/html/canvas/CanvasRenderingContext.h"
#include "core/layout/ContentChangeType.h"
#include "modules/webgl/WebGLContextAttributes.h"
#include "modules/webgl/WebGLExtensionName.h"
#include "modules/webgl/WebGLTexture.h"
#include "modules/webgl/WebGLVertexArrayObjectBase.h"
#include "platform/Timer.h"
#include "platform/graphics/ImageBuffer.h"
#include "platform/graphics/gpu/DrawingBuffer.h"
#include "platform/graphics/gpu/Extensions3DUtil.h"
#include "platform/graphics/gpu/WebGLImageConversion.h"
#include "public/platform/Platform.h"
#include "public/platform/WebGraphicsContext3DProvider.h"
#include "third_party/khronos/GLES2/gl2.h"
#include "wtf/CheckedNumeric.h"
#include "wtf/text/WTFString.h"
#include <memory>
#include <set>
namespace blink {
class WebLayer;
}
namespace gpu {
namespace gles2 {
class GLES2Interface;
}
}
namespace blink {
class EXTDisjointTimerQuery;
class EXTDisjointTimerQueryWebGL2;
class ExceptionState;
class HTMLCanvasElementOrOffscreenCanvas;
class HTMLImageElement;
class HTMLVideoElement;
class ImageBitmap;
class ImageBuffer;
class ImageData;
class IntSize;
class OESVertexArrayObject;
class WebGLActiveInfo;
class WebGLBuffer;
class WebGLCompressedTextureASTC;
class WebGLCompressedTextureATC;
class WebGLCompressedTextureETC;
class WebGLCompressedTextureETC1;
class WebGLCompressedTexturePVRTC;
class WebGLCompressedTextureS3TC;
class WebGLCompressedTextureS3TCsRGB;
class WebGLContextGroup;
class WebGLContextObject;
class WebGLDebugShaders;
class WebGLDrawBuffers;
class WebGLExtension;
class WebGLFramebuffer;
class WebGLObject;
class WebGLProgram;
class WebGLRenderbuffer;
class WebGLShader;
class WebGLShaderPrecisionFormat;
class WebGLUniformLocation;
class WebGLVertexArrayObjectBase;
class WebGLRenderingContextErrorMessageCallback;
// This class uses the color mask to prevent drawing to the alpha channel, if
// the DrawingBuffer requires RGB emulation.
class ScopedRGBEmulationColorMask {
STACK_ALLOCATED();
public:
ScopedRGBEmulationColorMask(WebGLRenderingContextBase*,
GLboolean* colorMask,
DrawingBuffer*);
~ScopedRGBEmulationColorMask();
private:
Member<WebGLRenderingContextBase> m_context;
GLboolean m_colorMask[4];
const bool m_requiresEmulation;
};
class MODULES_EXPORT WebGLRenderingContextBase : public CanvasRenderingContext,
public DrawingBuffer::Client {
WTF_MAKE_NONCOPYABLE(WebGLRenderingContextBase);
public:
~WebGLRenderingContextBase() override;
virtual String contextName() const = 0;
virtual void registerContextExtensions() = 0;
virtual void initializeNewContext();
static unsigned getWebGLVersion(const CanvasRenderingContext*);
static std::unique_ptr<WebGraphicsContext3DProvider>
createWebGraphicsContext3DProvider(HTMLCanvasElement*,
const CanvasContextCreationAttributes&,
unsigned webGLVersion);
static std::unique_ptr<WebGraphicsContext3DProvider>
createWebGraphicsContext3DProvider(ScriptState*,
const CanvasContextCreationAttributes&,
unsigned webGLVersion);
static void forceNextWebGLContextCreationToFail();
unsigned version() const { return m_version; }
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*);
virtual 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, DOMArrayBuffer* data, GLenum usage);
void bufferData(GLenum target, DOMArrayBufferView* data, GLenum usage);
void bufferSubData(GLenum target, long long offset, DOMArrayBuffer* data);
void bufferSubData(GLenum target,
long long offset,
const FlexibleArrayBufferView& 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,
DOMArrayBufferView* data);
void compressedTexSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLsizei width,
GLsizei height,
GLenum format,
DOMArrayBufferView* 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);
WebGLBuffer* createBuffer();
WebGLFramebuffer* createFramebuffer();
WebGLProgram* createProgram();
WebGLRenderbuffer* createRenderbuffer();
WebGLShader* createShader(GLenum type);
WebGLTexture* createTexture();
void cullFace(GLenum mode);
void deleteBuffer(WebGLBuffer*);
virtual 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);
WebGLActiveInfo* getActiveAttrib(WebGLProgram*, GLuint index);
WebGLActiveInfo* getActiveUniform(WebGLProgram*, GLuint index);
bool getAttachedShaders(WebGLProgram*, HeapVector<Member<WebGLShader>>&);
Nullable<HeapVector<Member<WebGLShader>>> getAttachedShaders(WebGLProgram*);
GLint getAttribLocation(WebGLProgram*, const String& name);
ScriptValue getBufferParameter(ScriptState*, GLenum target, GLenum pname);
void getContextAttributes(Nullable<WebGLContextAttributes>&);
GLenum getError();
ScriptValue getExtension(ScriptState*, const String& name);
virtual ScriptValue getFramebufferAttachmentParameter(ScriptState*,
GLenum target,
GLenum attachment,
GLenum pname);
virtual ScriptValue getParameter(ScriptState*, GLenum pname);
ScriptValue getProgramParameter(ScriptState*, WebGLProgram*, GLenum pname);
String getProgramInfoLog(WebGLProgram*);
ScriptValue getRenderbufferParameter(ScriptState*,
GLenum target,
GLenum pname);
ScriptValue getShaderParameter(ScriptState*, WebGLShader*, GLenum pname);
String getShaderInfoLog(WebGLShader*);
WebGLShaderPrecisionFormat* getShaderPrecisionFormat(GLenum shaderType,
GLenum precisionType);
String getShaderSource(WebGLShader*);
Nullable<Vector<String>> getSupportedExtensions();
virtual ScriptValue getTexParameter(ScriptState*,
GLenum target,
GLenum pname);
ScriptValue getUniform(ScriptState*,
WebGLProgram*,
const WebGLUniformLocation*);
WebGLUniformLocation* getUniformLocation(WebGLProgram*, const String&);
ScriptValue getVertexAttrib(ScriptState*, GLuint index, GLenum pname);
long long getVertexAttribOffset(GLuint index, GLenum pname);
void hint(GLenum target, GLenum mode);
GLboolean isBuffer(WebGLBuffer*);
bool isContextLost() const override;
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*);
virtual void pixelStorei(GLenum pname, GLint param);
void polygonOffset(GLfloat factor, GLfloat units);
virtual void readPixels(GLint x,
GLint y,
GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
DOMArrayBufferView* 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,
GLint internalformat,
GLsizei width,
GLsizei height,
GLint border,
GLenum format,
GLenum type,
DOMArrayBufferView*);
void texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
ImageData*);
void texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
HTMLImageElement*,
ExceptionState&);
void texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
HTMLCanvasElement*,
ExceptionState&);
void texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
HTMLVideoElement*,
ExceptionState&);
void texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
ImageBitmap*,
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,
DOMArrayBufferView*);
void texSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLenum format,
GLenum type,
ImageData*);
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 texSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLenum format,
GLenum type,
HTMLVideoElement*,
ExceptionState&);
void texSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLenum format,
GLenum type,
ImageBitmap*,
ExceptionState&);
void uniform1f(const WebGLUniformLocation*, GLfloat x);
void uniform1fv(const WebGLUniformLocation*, const FlexibleFloat32ArrayView&);
void uniform1fv(const WebGLUniformLocation*, Vector<GLfloat>&);
void uniform1i(const WebGLUniformLocation*, GLint x);
void uniform1iv(const WebGLUniformLocation*, const FlexibleInt32ArrayView&);
void uniform1iv(const WebGLUniformLocation*, Vector<GLint>&);
void uniform2f(const WebGLUniformLocation*, GLfloat x, GLfloat y);
void uniform2fv(const WebGLUniformLocation*, const FlexibleFloat32ArrayView&);
void uniform2fv(const WebGLUniformLocation*, Vector<GLfloat>&);
void uniform2i(const WebGLUniformLocation*, GLint x, GLint y);
void uniform2iv(const WebGLUniformLocation*, const FlexibleInt32ArrayView&);
void uniform2iv(const WebGLUniformLocation*, Vector<GLint>&);
void uniform3f(const WebGLUniformLocation*, GLfloat x, GLfloat y, GLfloat z);
void uniform3fv(const WebGLUniformLocation*, const FlexibleFloat32ArrayView&);
void uniform3fv(const WebGLUniformLocation*, Vector<GLfloat>&);
void uniform3i(const WebGLUniformLocation*, GLint x, GLint y, GLint z);
void uniform3iv(const WebGLUniformLocation*, const FlexibleInt32ArrayView&);
void uniform3iv(const WebGLUniformLocation*, Vector<GLint>&);
void uniform4f(const WebGLUniformLocation*,
GLfloat x,
GLfloat y,
GLfloat z,
GLfloat w);
void uniform4fv(const WebGLUniformLocation*, const FlexibleFloat32ArrayView&);
void uniform4fv(const WebGLUniformLocation*, Vector<GLfloat>&);
void uniform4i(const WebGLUniformLocation*,
GLint x,
GLint y,
GLint z,
GLint w);
void uniform4iv(const WebGLUniformLocation*, const FlexibleInt32ArrayView&);
void uniform4iv(const WebGLUniformLocation*, Vector<GLint>&);
void uniformMatrix2fv(const WebGLUniformLocation*,
GLboolean transpose,
DOMFloat32Array* value);
void uniformMatrix2fv(const WebGLUniformLocation*,
GLboolean transpose,
Vector<GLfloat>& value);
void uniformMatrix3fv(const WebGLUniformLocation*,
GLboolean transpose,
DOMFloat32Array* value);
void uniformMatrix3fv(const WebGLUniformLocation*,
GLboolean transpose,
Vector<GLfloat>& value);
void uniformMatrix4fv(const WebGLUniformLocation*,
GLboolean transpose,
DOMFloat32Array* value);
void uniformMatrix4fv(const WebGLUniformLocation*,
GLboolean transpose,
Vector<GLfloat>& value);
void useProgram(WebGLProgram*);
void validateProgram(WebGLProgram*);
void vertexAttrib1f(GLuint index, GLfloat x);
void vertexAttrib1fv(GLuint index, const DOMFloat32Array* values);
void vertexAttrib1fv(GLuint index, const Vector<GLfloat>& values);
void vertexAttrib2f(GLuint index, GLfloat x, GLfloat y);
void vertexAttrib2fv(GLuint index, const DOMFloat32Array* values);
void vertexAttrib2fv(GLuint index, const Vector<GLfloat>& values);
void vertexAttrib3f(GLuint index, GLfloat x, GLfloat y, GLfloat z);
void vertexAttrib3fv(GLuint index, const DOMFloat32Array* values);
void vertexAttrib3fv(GLuint index, const Vector<GLfloat>& values);
void vertexAttrib4f(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
void vertexAttrib4fv(GLuint index, const DOMFloat32Array* values);
void vertexAttrib4fv(GLuint index, const Vector<GLfloat>& values);
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 AutoRecoveryMethod {
// Don't restore automatically.
Manual,
// Restore when resources are available.
WhenAvailable,
// Restore as soon as possible, but only when
// the canvas is visible.
Auto
};
void loseContext(LostContextMode) override;
void forceLostContext(LostContextMode, AutoRecoveryMethod);
void forceRestoreContext();
void loseContextImpl(LostContextMode, AutoRecoveryMethod);
uint32_t numberOfContextLosses() const;
// Utilities to restore GL state to match the rendering context's
// saved state. Use these after contextGL()-based state changes that
// bypass the rendering context.
void restoreScissorEnabled();
void restoreScissorBox();
void restoreClearColor();
void restoreColorMask();
gpu::gles2::GLES2Interface* contextGL() const {
DrawingBuffer* d = drawingBuffer();
if (!d)
return nullptr;
return d->contextGL();
}
WebGLContextGroup* contextGroup() const { return m_contextGroup.get(); }
Extensions3DUtil* extensionsUtil();
void reshape(int width, int height) override;
void markLayerComposited() override;
ImageData* paintRenderingResultsToImageData(SourceDrawingBuffer) override;
unsigned maxVertexAttribs() const { return m_maxVertexAttribs; }
DECLARE_VIRTUAL_TRACE();
DECLARE_VIRTUAL_TRACE_WRAPPERS();
// Returns approximate gpu memory allocated per pixel.
int externallyAllocatedBytesPerPixel() override;
class TextureUnitState {
DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
public:
TraceWrapperMember<WebGLTexture> m_texture2DBinding;
TraceWrapperMember<WebGLTexture> m_textureCubeMapBinding;
TraceWrapperMember<WebGLTexture> m_texture3DBinding;
TraceWrapperMember<WebGLTexture> m_texture2DArrayBinding;
DECLARE_TRACE();
// Wrappers are traced by parent since TextureUnitState is not a heap
// object.
};
PassRefPtr<Image> getImage(AccelerationHint, SnapshotReason) const override;
ImageData* toImageData(SnapshotReason) override;
void setFilterQuality(SkFilterQuality) override;
bool isWebGL2OrHigher() { return version() >= 2; }
void getHTMLOrOffscreenCanvas(HTMLCanvasElementOrOffscreenCanvas&) const;
ScriptPromise commit(ScriptState*, ExceptionState&);
protected:
friend class EXTDisjointTimerQuery;
friend class EXTDisjointTimerQueryWebGL2;
friend class WebGLDrawBuffers;
friend class WebGLFramebuffer;
friend class WebGLObject;
friend class WebGLContextObject;
friend class OESVertexArrayObject;
friend class WebGLDebugShaders;
friend class WebGLCompressedTextureASTC;
friend class WebGLCompressedTextureATC;
friend class WebGLCompressedTextureETC;
friend class WebGLCompressedTextureETC1;
friend class WebGLCompressedTexturePVRTC;
friend class WebGLCompressedTextureS3TC;
friend class WebGLCompressedTextureS3TCsRGB;
friend class WebGLRenderingContextErrorMessageCallback;
friend class WebGLVertexArrayObjectBase;
friend class ScopedDrawingBufferBinder;
friend class ScopedTexture2DRestorer;
friend class ScopedFramebufferRestorer;
// To allow V8WebGL[2]RenderingContext to call visitChildDOMWrappers.
friend class V8WebGLRenderingContext;
friend class ScopedUnpackParametersResetRestore;
WebGLRenderingContextBase(HTMLCanvasElement*,
std::unique_ptr<WebGraphicsContext3DProvider>,
const CanvasContextCreationAttributes&,
unsigned);
WebGLRenderingContextBase(OffscreenCanvas*,
std::unique_ptr<WebGraphicsContext3DProvider>,
const CanvasContextCreationAttributes&,
unsigned);
PassRefPtr<DrawingBuffer> createDrawingBuffer(
std::unique_ptr<WebGraphicsContext3DProvider>,
DrawingBuffer::ChromiumImageUsage);
void setupFlags();
// CanvasRenderingContext implementation.
bool is3d() const override { return true; }
bool isAccelerated() const override { return true; }
void setIsHidden(bool) override;
bool paintRenderingResultsToCanvas(SourceDrawingBuffer) override;
WebLayer* platformLayer() const override;
void stop() override;
// DrawingBuffer::Client implementation.
bool DrawingBufferClientIsBoundForDraw() override;
void DrawingBufferClientRestoreScissorTest() override;
void DrawingBufferClientRestoreMaskAndClearValues() override;
void DrawingBufferClientRestorePixelPackAlignment() override;
void DrawingBufferClientRestoreTexture2DBinding() override;
void DrawingBufferClientRestoreRenderbufferBinding() override;
void DrawingBufferClientRestoreFramebufferBinding() override;
void DrawingBufferClientRestorePixelUnpackBufferBinding() override;
virtual void destroyContext();
void markContextChanged(ContentChangeType);
void onErrorMessage(const char*, int32_t id);
void notifyCanvasContextChanged();
// 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) const;
// 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();
// Set UNPACK_ALIGNMENT to 1, all other parameters to 0.
virtual void resetUnpackParameters();
// Restore the client unpack parameters.
virtual void restoreUnpackParameters();
virtual void visitChildDOMWrappers(v8::Isolate*,
const v8::Persistent<v8::Object>&);
PassRefPtr<Image> drawImageIntoBuffer(PassRefPtr<Image>,
int width,
int height,
const char* functionName);
PassRefPtr<Image> videoFrameToImage(HTMLVideoElement*);
// Structure for rendering to a DrawingBuffer, instead of directly
// to the back-buffer of m_context.
RefPtr<DrawingBuffer> m_drawingBuffer;
DrawingBuffer* drawingBuffer() const;
TraceWrapperMember<WebGLContextGroup> m_contextGroup;
bool m_isHidden;
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_markedCanvasDirty;
// List of bound VBO's. Used to maintain info about sizes for ARRAY_BUFFER and
// stored values for ELEMENT_ARRAY_BUFFER
TraceWrapperMember<WebGLBuffer> m_boundArrayBuffer;
Member<WebGLVertexArrayObjectBase> m_defaultVertexArrayObject;
TraceWrapperMember<WebGLVertexArrayObjectBase> m_boundVertexArrayObject;
void setBoundVertexArrayObject(WebGLVertexArrayObjectBase*);
enum VertexAttribValueType {
Float32ArrayType,
Int32ArrayType,
Uint32ArrayType,
};
Vector<VertexAttribValueType> m_vertexAttribType;
unsigned m_maxVertexAttribs;
void setVertexAttribType(GLuint index, VertexAttribValueType);
TraceWrapperMember<WebGLProgram> m_currentProgram;
TraceWrapperMember<WebGLFramebuffer> m_framebufferBinding;
TraceWrapperMember<WebGLRenderbuffer> m_renderbufferBinding;
HeapVector<TextureUnitState> m_textureUnits;
unsigned long m_activeTextureUnit;
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&);
private:
void bubbleToFront(int idx);
std::unique_ptr<std::unique_ptr<ImageBuffer>[]> m_buffers;
int m_capacity;
};
LRUImageBufferCache m_generatedImageCache;
GLint m_maxTextureSize;
GLint m_maxCubeMapTextureSize;
GLint m_max3DTextureSize;
GLint m_maxArrayTextureLayers;
GLint m_maxRenderbufferSize;
GLint m_maxViewportDims[2];
GLint m_maxTextureLevel;
GLint m_maxCubeMapTextureLevel;
GLint m_max3DTextureLevel;
GLint m_maxDrawBuffers;
GLint m_maxColorAttachments;
GLenum m_backDrawBuffer;
bool m_drawBuffersWebGLRequirementsChecked;
bool m_drawBuffersSupported;
GLenum m_readBufferOfDefaultFramebuffer;
GLint m_packAlignment;
GLint m_unpackAlignment;
bool m_unpackFlipY;
bool m_unpackPremultiplyAlpha;
GLenum m_unpackColorspaceConversion;
GLfloat m_clearColor[4];
bool m_scissorEnabled;
GLint m_scissorBox[4];
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_isDepthStencilSupported;
bool m_synthesizedErrorsToConsole;
int m_numGLErrorsToConsoleAllowed;
unsigned long m_onePlusMaxNonDefaultTextureUnit;
std::unique_ptr<Extensions3DUtil> m_extensionsUtil;
enum ExtensionFlags {
ApprovedExtension = 0x00,
// Extension that is behind the draft extensions runtime flag:
DraftExtension = 0x01,
};
class ExtensionTracker : public GarbageCollected<ExtensionTracker>,
public TraceWrapperBase {
public:
ExtensionTracker(ExtensionFlags flags, const char* const* prefixes)
: m_draft(flags & DraftExtension), m_prefixes(prefixes) {}
bool draft() const { return m_draft; }
const char* const* prefixes() const;
bool matchesNameWithPrefixes(const String&) const;
virtual WebGLExtension* getExtension(WebGLRenderingContextBase*) = 0;
virtual bool supported(WebGLRenderingContextBase*) const = 0;
virtual const char* extensionName() const = 0;
virtual void loseExtension(bool) = 0;
// This is only used for keeping the JS wrappers of extensions alive.
virtual WebGLExtension* getExtensionObjectIfAlreadyEnabled() = 0;
DEFINE_INLINE_VIRTUAL_TRACE() {}
private:
bool m_draft;
const char* const* m_prefixes;
};
template <typename T>
class TypedExtensionTracker final : public ExtensionTracker {
public:
static TypedExtensionTracker<T>* create(Member<T>& extensionField,
ExtensionFlags flags,
const char* const* prefixes) {
return new TypedExtensionTracker<T>(extensionField, flags, prefixes);
}
WebGLExtension* getExtension(WebGLRenderingContextBase* context) override {
if (!m_extension) {
m_extension = T::create(context);
m_extensionField = m_extension;
}
return m_extension;
}
bool supported(WebGLRenderingContextBase* context) const override {
return T::supported(context);
}
const char* extensionName() const override { return T::extensionName(); }
void loseExtension(bool force) override {
if (m_extension) {
m_extension->lose(force);
if (m_extension->isLost())
m_extension = nullptr;
}
}
WebGLExtension* getExtensionObjectIfAlreadyEnabled() override {
return m_extension;
}
DEFINE_INLINE_VIRTUAL_TRACE() {
visitor->trace(m_extension);
ExtensionTracker::trace(visitor);
}
DEFINE_INLINE_VIRTUAL_TRACE_WRAPPERS() {
visitor->traceWrappers(m_extension);
}
private:
TypedExtensionTracker(Member<T>& extensionField,
ExtensionFlags flags,
const char* const* prefixes)
: ExtensionTracker(flags, prefixes),
m_extensionField(extensionField),
m_extension(this, nullptr) {}
GC_PLUGIN_IGNORE("http://crbug.com/519953")
Member<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
TraceWrapperMember<T> m_extension;
};
bool m_extensionEnabled[WebGLExtensionNameCount];
HeapVector<TraceWrapperMember<ExtensionTracker>> m_extensions;
template <typename T>
void registerExtension(Member<T>& extensionPtr,
ExtensionFlags flags = ApprovedExtension,
const char* const* prefixes = nullptr) {
m_extensions.push_back(TraceWrapperMember<ExtensionTracker>(
this, TypedExtensionTracker<T>::create(extensionPtr, flags, prefixes)));
}
bool extensionSupportedAndAllowed(const ExtensionTracker*);
inline bool extensionEnabled(WebGLExtensionName name) {
return m_extensionEnabled[name];
}
// ScopedDrawingBufferBinder is used for
// ReadPixels/CopyTexImage2D/CopySubImage2D to read from a multisampled
// DrawingBuffer. In this situation, we need to blit to a single sampled
// buffer for reading, during which the bindings could be changed and need to
// be recovered.
class ScopedDrawingBufferBinder {
STACK_ALLOCATED();
public:
ScopedDrawingBufferBinder(DrawingBuffer* drawingBuffer,
WebGLFramebuffer* framebufferBinding)
: m_drawingBuffer(drawingBuffer),
m_readFramebufferBinding(framebufferBinding) {
// Commit DrawingBuffer if needed (e.g., for multisampling)
if (!m_readFramebufferBinding && m_drawingBuffer)
m_drawingBuffer->resolveAndBindForReadAndDraw();
}
~ScopedDrawingBufferBinder() {
// Restore DrawingBuffer if needed
if (!m_readFramebufferBinding && m_drawingBuffer)
m_drawingBuffer->restoreFramebufferBindings();
}
private:
DrawingBuffer* m_drawingBuffer;
Member<WebGLFramebuffer> m_readFramebufferBinding;
};
// Errors raised by synthesizeGLError() while the context is lost.
Vector<GLenum> m_lostContextErrors;
// Other errors raised by synthesizeGLError().
Vector<GLenum> m_syntheticErrors;
bool m_isWebGL2FormatsTypesAdded;
bool m_isWebGL2TexImageSourceFormatsTypesAdded;
bool m_isWebGL2InternalFormatsCopyTexImageAdded;
bool m_isOESTextureFloatFormatsTypesAdded;
bool m_isOESTextureHalfFloatFormatsTypesAdded;
bool m_isWebGLDepthTextureFormatsTypesAdded;
bool m_isEXTsRGBFormatsTypesAdded;
std::set<GLenum> m_supportedInternalFormats;
std::set<GLenum> m_supportedTexImageSourceInternalFormats;
std::set<GLenum> m_supportedInternalFormatsCopyTexImage;
std::set<GLenum> m_supportedFormats;
std::set<GLenum> m_supportedTexImageSourceFormats;
std::set<GLenum> m_supportedTypes;
std::set<GLenum> m_supportedTexImageSourceTypes;
// Helpers for getParameter and others
ScriptValue getBooleanParameter(ScriptState*, GLenum);
ScriptValue getBooleanArrayParameter(ScriptState*, GLenum);
ScriptValue getFloatParameter(ScriptState*, GLenum);
ScriptValue getIntParameter(ScriptState*, GLenum);
ScriptValue getInt64Parameter(ScriptState*, GLenum);
ScriptValue getUnsignedIntParameter(ScriptState*, GLenum);
ScriptValue getWebGLFloatArrayParameter(ScriptState*, GLenum);
ScriptValue getWebGLIntArrayParameter(ScriptState*, 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 |CombinedClear| if that clear is now
// unnecessary.
enum HowToClear {
// Skip clearing the backbuffer.
Skipped,
// Clear the backbuffer.
JustClear,
// Combine webgl.clear() API with the backbuffer clear, so webgl.clear()
// doesn't have to call glClear() again.
CombinedClear
};
HowToClear clearIfComposited(GLbitfield clearMask = 0);
// Convert texture internal format.
GLenum convertTexInternalFormat(GLenum internalformat, GLenum type);
enum TexImageFunctionType {
TexImage,
TexSubImage,
CopyTexImage,
CompressedTexImage
};
// This must stay in sync with WebMediaPlayer::TexImageFunctionID.
enum TexImageFunctionID {
TexImage2D,
TexSubImage2D,
TexImage3D,
TexSubImage3D
};
static SnapshotReason functionIDToSnapshotReason(TexImageFunctionID);
enum TexImageDimension { Tex2D, Tex3D };
void texImage2DBase(GLenum target,
GLint level,
GLint internalformat,
GLsizei width,
GLsizei height,
GLint border,
GLenum format,
GLenum type,
const void* pixels);
void texImageImpl(TexImageFunctionID,
GLenum target,
GLint level,
GLint internalformat,
GLint xoffset,
GLint yoffset,
GLint zoffset,
GLenum format,
GLenum type,
Image*,
WebGLImageConversion::ImageHtmlDomSource,
bool flipY,
bool premultiplyAlpha,
const IntRect&,
GLsizei depth,
GLint unpackImageHeight);
template <typename T>
IntRect getTextureSourceSize(T* textureSource) {
return IntRect(0, 0, textureSource->width(), textureSource->height());
}
template <typename T>
bool validateTexImageSubRectangle(const char* functionName,
TexImageFunctionID functionID,
T* image,
const IntRect& subRect,
GLsizei depth,
GLint unpackImageHeight,
bool* selectingSubRectangle) {
DCHECK(functionName);
DCHECK(selectingSubRectangle);
DCHECK(image);
int imageWidth = static_cast<int>(image->width());
int imageHeight = static_cast<int>(image->height());
*selectingSubRectangle =
!(subRect.x() == 0 && subRect.y() == 0 &&
subRect.width() == imageWidth && subRect.height() == imageHeight);
// If the source image rect selects anything except the entire
// contents of the image, assert that we're running WebGL 2.0 or
// higher, since this should never happen for WebGL 1.0 (even though
// the code could support it). If the image is null, that will be
// signaled as an error later.
DCHECK(!*selectingSubRectangle || isWebGL2OrHigher())
<< "subRect = (" << subRect.width() << " x " << subRect.height()
<< ") @ (" << subRect.x() << ", " << subRect.y() << "), image = ("
<< imageWidth << " x " << imageHeight << ")";
if (subRect.x() < 0 || subRect.y() < 0 || subRect.maxX() > imageWidth ||
subRect.maxY() > imageHeight || subRect.width() < 0 ||
subRect.height() < 0) {
synthesizeGLError(GL_INVALID_OPERATION, functionName,
"source sub-rectangle specified via pixel unpack "
"parameters is invalid");
return false;
}
if (functionID == TexImage3D || functionID == TexSubImage3D) {
DCHECK_GE(unpackImageHeight, 0);
if (depth < 1) {
synthesizeGLError(GL_INVALID_OPERATION, functionName,
"Can't define a 3D texture with depth < 1");
return false;
}
// According to the WebGL 2.0 spec, specifying depth > 1 means
// to select multiple rectangles stacked vertically.
WTF::CheckedNumeric<GLint> maxYAccessed;
if (unpackImageHeight) {
maxYAccessed = unpackImageHeight;
} else {
maxYAccessed = subRect.height();
}
maxYAccessed *= depth - 1;
maxYAccessed += subRect.height();
maxYAccessed += subRect.y();
if (!maxYAccessed.IsValid()) {
synthesizeGLError(GL_INVALID_OPERATION, functionName,
"Out-of-range parameters passed for 3D texture "
"upload");
return false;
}
if (maxYAccessed.ValueOrDie() > imageHeight) {
synthesizeGLError(GL_INVALID_OPERATION, functionName,
"Not enough data supplied to upload to a 3D texture "
"with depth > 1");
return false;
}
} else {
DCHECK_EQ(depth, 1);
DCHECK_EQ(unpackImageHeight, 0);
}
return true;
}
// Copy from the source directly to the texture via the gpu, without a
// read-back to system memory. Source could be canvas or imageBitmap.
void texImageByGPU(TexImageFunctionID,
WebGLTexture*,
GLenum target,
GLint level,
GLint internalformat,
GLenum type,
GLint xoffset,
GLint yoffset,
GLint zoffset,
CanvasImageSource*,
const IntRect& sourceSubRectangle);
virtual bool canUseTexImageByGPU(TexImageFunctionID,
GLint internalformat,
GLenum type);
virtual WebGLImageConversion::PixelStoreParams getPackPixelStoreParams();
virtual WebGLImageConversion::PixelStoreParams getUnpackPixelStoreParams(
TexImageDimension);
// 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 verify limits on the length of uniform and attribute
// locations.
virtual unsigned getMaxWebGLLocationLength() const { return 256; }
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, GLint z = 0);
// 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 if all characters in the shader source belong to
// the ASCII subset as defined in GLSL ES 1.0 spec section 3.1 Character Set
// for WebGL 1.0 and in GLSL ES 3.00 spec section 3.1 Character Set for WebGL
// 2.0.
bool validateShaderSource(const String&);
// Helper function to check texture binding 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);
// Wrapper function for validateTexture2D(3D)Binding, used in texImageHelper
// functions.
virtual WebGLTexture* validateTexImageBinding(const char*,
TexImageFunctionID,
GLenum);
// Helper function to check texture 2D 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* validateTexture2DBinding(const char* functionName,
GLenum target);
void addExtensionSupportedFormatsTypes();
// Helper function to check input internalformat/format/type for functions
// Tex{Sub}Image taking TexImageSource source data. Generates GL error and
// returns false if parameters are invalid.
bool validateTexImageSourceFormatAndType(const char* functionName,
TexImageFunctionType,
GLenum internalformat,
GLenum format,
GLenum type);
// Helper function to check input internalformat/format/type for functions
// Tex{Sub}Image. Generates GL error and returns false if parameters are
// invalid.
bool validateTexFuncFormatAndType(const char* functionName,
TexImageFunctionType,
GLenum internalformat,
GLenum format,
GLenum type,
GLint level);
// Helper function to check readbuffer validity for copyTex{Sub}Image.
// If yes, obtains the bound read framebuffer, returns true.
// If not, generates a GL error, returns false.
bool validateReadBufferAndGetInfo(const char* functionName,
WebGLFramebuffer*& readFramebufferBinding);
// Helper function to check format/type and ArrayBuffer view type for
// readPixels.
// Generates INVALID_ENUM and returns false if parameters are invalid.
// Generates INVALID_OPERATION if ArrayBuffer view type is incompatible with
// type.
virtual bool validateReadPixelsFormatAndType(GLenum format,
GLenum type,
DOMArrayBufferView*);
// Helper function to check parameters of readPixels. Returns true if all
// parameters are valid. Otherwise, generates appropriate error and returns
// false.
bool validateReadPixelsFuncParameters(GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
DOMArrayBufferView*,
long long bufferSize);
virtual GLint getMaxTextureLevelForTarget(GLenum target);
// 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 TexFuncValidationSourceType {
SourceArrayBufferView,
SourceImageData,
SourceHTMLImageElement,
SourceHTMLCanvasElement,
SourceHTMLVideoElement,
SourceImageBitmap,
SourceUnpackBuffer,
};
// Helper function for tex{Sub}Image{2|3}D to check if the input
// format/type/level/target/width/height/depth/border/xoffset/yoffset/zoffset
// are valid. Otherwise, it would return quickly without doing other work.
bool validateTexFunc(const char* functionName,
TexImageFunctionType,
TexFuncValidationSourceType,
GLenum target,
GLint level,
GLenum internalformat,
GLsizei width,
GLsizei height,
GLsizei depth,
GLint border,
GLenum format,
GLenum type,
GLint xoffset,
GLint yoffset,
GLint zoffset);
// 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,
TexImageFunctionType,
GLenum target,
GLint level,
GLsizei width,
GLsizei height,
GLsizei depth);
// 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,
TexImageFunctionType,
TexFuncValidationSourceType,
GLenum target,
GLint level,
GLenum internalformat,
GLsizei width,
GLsizei height,
GLsizei depth,
GLint border,
GLenum format,
GLenum type);
enum NullDisposition { NullAllowed, NullNotAllowed, NullNotReachable };
// 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,
TexImageDimension,
GLint level,
GLsizei width,
GLsizei height,
GLsizei depth,
GLenum format,
GLenum type,
DOMArrayBufferView* pixels,
NullDisposition,
GLuint srcOffset);
// 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 format for CopyTexImage.
bool validateCopyTexFormat(const char* functionName, GLenum format);
// Helper function for validating compressed texture formats.
bool validateCompressedTexFormat(const char* functionName, GLenum format);
// 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 paramf,
GLint parami,
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 the target for checkFramebufferStatus and
// validateFramebufferFuncParameters.
virtual bool validateFramebufferTarget(GLenum target);
// Get the framebuffer bound to given target
virtual WebGLFramebuffer* getFramebufferBinding(GLenum target);
virtual WebGLFramebuffer* getReadFramebufferBinding();
// 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.
virtual bool validateCapability(const char* functionName, GLenum);
// Helper function to validate input parameters for uniform functions.
bool validateUniformParameters(const char* functionName,
const WebGLUniformLocation*,
void*,
GLsizei,
GLsizei mod,
GLuint srcOffset,
GLuint srcLength);
bool validateUniformMatrixParameters(const char* functionName,
const WebGLUniformLocation*,
GLboolean transpose,
DOMFloat32Array*,
GLsizei mod,
GLuint srcOffset,
GLuint srcLength);
bool validateUniformMatrixParameters(const char* functionName,
const WebGLUniformLocation*,
GLboolean transpose,
void*,
GLsizei,
GLsizei mod,
GLuint srcOffset,
GLuint srcLength);
template <typename WTFTypedArray>
bool validateUniformParameters(
const char* functionName,
const WebGLUniformLocation* location,
const TypedFlexibleArrayBufferView<WTFTypedArray>& v,
GLsizei requiredMinSize,
GLuint srcOffset,
GLuint srcLength) {
if (!v.dataMaybeOnStack()) {
synthesizeGLError(GL_INVALID_VALUE, functionName, "no array");
return false;
}
return validateUniformMatrixParameters(
functionName, location, false, v.dataMaybeOnStack(), v.length(),
requiredMinSize, srcOffset, srcLength);
}
// Helper function to validate the target for bufferData and
// getBufferParameter.
virtual bool validateBufferTarget(const char* functionName, GLenum target);
// Helper function to validate the target for bufferData.
// Return the current bound buffer to target, or 0 if the target is invalid.
virtual WebGLBuffer* validateBufferDataTarget(const char* functionName,
GLenum target);
// Helper function to validate the usage for bufferData.
virtual bool validateBufferDataUsage(const char* functionName, GLenum usage);
virtual bool validateAndUpdateBufferBindTarget(const char* functionName,
GLenum target,
WebGLBuffer*);
virtual void removeBoundBuffer(WebGLBuffer*);
// 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 for tex{Sub}Image2D to make sure video is ready wouldn't
// taint Origin.
bool validateHTMLVideoElement(const char* functionName,
HTMLVideoElement*,
ExceptionState&);
// Helper function for tex{Sub}Image2D to make sure imagebitmap is ready and
// wouldn't taint Origin.
bool validateImageBitmap(const char* functionName,
ImageBitmap*,
ExceptionState&);
// Helper function to validate drawArrays(Instanced) calls
bool validateDrawArrays(const char* functionName);
// Helper function to validate drawElements(Instanced) calls
bool validateDrawElements(const char* functionName,
GLenum type,
long long offset);
// 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,
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(TimerBase*);
// Helper for restoration after context lost.
void maybeRestoreContext(TimerBase*);
enum ConsoleDisplayPreference { DisplayInConsole, DontDisplayInConsole };
// Reports an error to glGetError, 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() const;
// 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 setFramebuffer(GLenum, WebGLFramebuffer*);
virtual void restoreCurrentFramebuffer();
void restoreCurrentTexture2D();
void findNewMaxNonDefaultTextureUnit();
virtual void renderbufferStorageImpl(GLenum target,
GLsizei samples,
GLenum internalformat,
GLsizei width,
GLsizei height,
const char* functionName);
friend class WebGLStateRestorer;
friend class WebGLRenderingContextEvictionManager;
static void activateContext(WebGLRenderingContextBase*);
static void deactivateContext(WebGLRenderingContextBase*);
static void addToEvictedList(WebGLRenderingContextBase*);
static void removeFromEvictedList(WebGLRenderingContextBase*);
static void restoreEvictedContext(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 WebGLRenderingContextBase* oldestContext();
static WebGLRenderingContextBase* oldestEvictedContext();
friend class ScopedRGBEmulationColorMask;
unsigned m_activeScopedRGBEmulationColorMasks;
ImageBitmap* transferToImageBitmapBase(ScriptState*);
// Helper functions for tex(Sub)Image2D && texSubImage3D
void texImageHelperDOMArrayBufferView(TexImageFunctionID,
GLenum,
GLint,
GLint,
GLsizei,
GLsizei,
GLsizei,
GLint,
GLenum,
GLenum,
GLint,
GLint,
GLint,
DOMArrayBufferView*,
NullDisposition,
GLuint srcOffset);
void texImageHelperImageData(TexImageFunctionID,
GLenum,
GLint,
GLint,
GLint,
GLenum,
GLenum,
GLsizei,
GLint,
GLint,
GLint,
ImageData*,
const IntRect&,
GLint);
void texImageHelperHTMLImageElement(TexImageFunctionID,
GLenum,
GLint,
GLint,
GLenum,
GLenum,
GLint,
GLint,
GLint,
HTMLImageElement*,
const IntRect&,
GLsizei,
GLint,
ExceptionState&);
void texImageHelperHTMLCanvasElement(TexImageFunctionID,
GLenum,
GLint,
GLint,
GLenum,
GLenum,
GLint,
GLint,
GLint,
HTMLCanvasElement*,
const IntRect&,
GLsizei,
GLint,
ExceptionState&);
void texImageHelperHTMLVideoElement(TexImageFunctionID,
GLenum,
GLint,
GLint,
GLenum,
GLenum,
GLint,
GLint,
GLint,
HTMLVideoElement*,
const IntRect&,
GLsizei,
GLint,
ExceptionState&);
void texImageHelperImageBitmap(TexImageFunctionID,
GLenum,
GLint,
GLint,
GLenum,
GLenum,
GLint,
GLint,
GLint,
ImageBitmap*,
const IntRect&,
GLsizei,
GLint,
ExceptionState&);
static const char* getTexImageFunctionName(TexImageFunctionID);
IntRect sentinelEmptyRect();
IntRect safeGetImageSize(Image*);
IntRect getImageDataSize(ImageData*);
// Helper implementing readPixels for WebGL 1.0 and 2.0.
void readPixelsHelper(GLint x,
GLint y,
GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
DOMArrayBufferView* pixels,
GLuint offset);
private:
WebGLRenderingContextBase(HTMLCanvasElement*,
OffscreenCanvas*,
std::unique_ptr<WebGraphicsContext3DProvider>,
const CanvasContextCreationAttributes&,
unsigned);
static std::unique_ptr<WebGraphicsContext3DProvider>
createContextProviderInternal(HTMLCanvasElement*,
ScriptState*,
const CanvasContextCreationAttributes&,
unsigned);
void texImageCanvasByGPU(TexImageFunctionID,
HTMLCanvasElement*,
GLuint,
GLenum,
GLenum,
GLint,
GLint,
GLint,
const IntRect& sourceSubRectangle);
void texImageBitmapByGPU(ImageBitmap*, GLuint, GLenum, GLenum, GLint, bool);
sk_sp<SkImage> makeImageSnapshot(SkImageInfo&);
const unsigned m_version;
bool isPaintable() const final { return drawingBuffer(); }
};
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 // WebGLRenderingContextBase_h
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