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gecko/dom/canvas/WebGLContext.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef WEBGLCONTEXT_H_
#define WEBGLCONTEXT_H_
#include "mozilla/Attributes.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/EnumeratedArray.h"
#include "mozilla/LinkedList.h"
#include "mozilla/UniquePtr.h"
#include "GLDefs.h"
#include "WebGLActiveInfo.h"
#include "WebGLObjectModel.h"
#include "WebGLRenderbuffer.h"
#include <stdarg.h>
#include "nsTArray.h"
#include "nsCycleCollectionNoteChild.h"
#include "nsIDOMWebGLRenderingContext.h"
#include "nsICanvasRenderingContextInternal.h"
#include "mozilla/dom/HTMLCanvasElement.h"
#include "nsWrapperCache.h"
#include "nsIObserver.h"
#include "nsIDOMEventListener.h"
#include "nsLayoutUtils.h"
#include "GLContextProvider.h"
#include "mozilla/gfx/2D.h"
#ifdef XP_MACOSX
#include "ForceDiscreteGPUHelperCGL.h"
#endif
#include "mozilla/dom/TypedArray.h"
#include "mozilla/ErrorResult.h"
class nsIDocShell;
/*
* Minimum value constants defined in 6.2 State Tables of OpenGL ES - 2.0.25
* https://bugzilla.mozilla.org/show_bug.cgi?id=686732
*
* Exceptions: some of the following values are set to higher values than in the spec because
* the values in the spec are ridiculously low. They are explicitly marked below
*/
#define MINVALUE_GL_MAX_TEXTURE_SIZE 1024 // Different from the spec, which sets it to 64 on page 162
#define MINVALUE_GL_MAX_CUBE_MAP_TEXTURE_SIZE 512 // Different from the spec, which sets it to 16 on page 162
#define MINVALUE_GL_MAX_VERTEX_ATTRIBS 8 // Page 164
#define MINVALUE_GL_MAX_FRAGMENT_UNIFORM_VECTORS 16 // Page 164
#define MINVALUE_GL_MAX_VERTEX_UNIFORM_VECTORS 128 // Page 164
#define MINVALUE_GL_MAX_VARYING_VECTORS 8 // Page 164
#define MINVALUE_GL_MAX_TEXTURE_IMAGE_UNITS 8 // Page 164
#define MINVALUE_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS 0 // Page 164
#define MINVALUE_GL_MAX_RENDERBUFFER_SIZE 1024 // Different from the spec, which sets it to 1 on page 164
#define MINVALUE_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS 8 // Page 164
namespace mozilla {
class WebGLObserver;
class WebGLContextBoundObject;
class WebGLActiveInfo;
class WebGLExtensionBase;
class WebGLBuffer;
struct WebGLVertexAttribData;
class WebGLShader;
class WebGLProgram;
class WebGLQuery;
class WebGLUniformLocation;
class WebGLFramebuffer;
class WebGLRenderbuffer;
class WebGLShaderPrecisionFormat;
class WebGLTexture;
class WebGLVertexArray;
namespace dom {
class ImageData;
class Element;
struct WebGLContextAttributes;
template<typename> struct Nullable;
}
namespace gfx {
class SourceSurface;
}
WebGLTexelFormat GetWebGLTexelFormat(GLenum format, GLenum type);
void AssertUintParamCorrect(gl::GLContext* gl, GLenum pname, GLuint shadow);
struct WebGLContextOptions {
// these are defaults
WebGLContextOptions();
bool operator==(const WebGLContextOptions& other) const {
return
alpha == other.alpha &&
depth == other.depth &&
stencil == other.stencil &&
premultipliedAlpha == other.premultipliedAlpha &&
antialias == other.antialias &&
preserveDrawingBuffer == other.preserveDrawingBuffer;
}
bool operator!=(const WebGLContextOptions& other) const {
return !operator==(other);
}
bool alpha;
bool depth;
bool stencil;
bool premultipliedAlpha;
bool antialias;
bool preserveDrawingBuffer;
};
#ifdef DEBUG
static bool
IsTextureBinding(GLenum binding)
{
switch (binding) {
case LOCAL_GL_TEXTURE_BINDING_2D:
case LOCAL_GL_TEXTURE_BINDING_CUBE_MAP:
return true;
}
return false;
}
#endif
class WebGLContext :
public nsIDOMWebGLRenderingContext,
public nsICanvasRenderingContextInternal,
public nsSupportsWeakReference,
public WebGLRectangleObject,
public nsWrapperCache
{
friend class WebGLContextUserData;
friend class WebGLExtensionCompressedTextureATC;
friend class WebGLExtensionCompressedTextureETC1;
friend class WebGLExtensionCompressedTexturePVRTC;
friend class WebGLExtensionCompressedTextureS3TC;
friend class WebGLExtensionDepthTexture;
friend class WebGLExtensionDrawBuffers;
friend class WebGLExtensionLoseContext;
friend class WebGLExtensionVertexArray;
friend class WebGLObserver;
friend class WebGLMemoryTracker;
enum {
UNPACK_FLIP_Y_WEBGL = 0x9240,
UNPACK_PREMULTIPLY_ALPHA_WEBGL = 0x9241,
CONTEXT_LOST_WEBGL = 0x9242,
UNPACK_COLORSPACE_CONVERSION_WEBGL = 0x9243,
BROWSER_DEFAULT_WEBGL = 0x9244,
UNMASKED_VENDOR_WEBGL = 0x9245,
UNMASKED_RENDERER_WEBGL = 0x9246
};
public:
WebGLContext();
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(WebGLContext,
nsIDOMWebGLRenderingContext)
virtual JSObject* WrapObject(JSContext *cx) = 0;
NS_DECL_NSIDOMWEBGLRENDERINGCONTEXT
// nsICanvasRenderingContextInternal
#ifdef DEBUG
virtual int32_t GetWidth() const MOZ_OVERRIDE;
virtual int32_t GetHeight() const MOZ_OVERRIDE;
#endif
NS_IMETHOD SetDimensions(int32_t width, int32_t height) MOZ_OVERRIDE;
NS_IMETHOD InitializeWithSurface(nsIDocShell *docShell, gfxASurface *surface, int32_t width, int32_t height) MOZ_OVERRIDE
{ return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD Reset() MOZ_OVERRIDE
{ /* (InitializeWithSurface) */ return NS_ERROR_NOT_IMPLEMENTED; }
virtual void GetImageBuffer(uint8_t** aImageBuffer, int32_t* aFormat);
NS_IMETHOD GetInputStream(const char* aMimeType,
const char16_t* aEncoderOptions,
nsIInputStream **aStream) MOZ_OVERRIDE;
mozilla::TemporaryRef<mozilla::gfx::SourceSurface> GetSurfaceSnapshot(bool* aPremultAlpha) MOZ_OVERRIDE;
NS_IMETHOD SetIsOpaque(bool b) MOZ_OVERRIDE { return NS_OK; };
bool GetIsOpaque() MOZ_OVERRIDE { return false; }
NS_IMETHOD SetContextOptions(JSContext* aCx,
JS::Handle<JS::Value> aOptions) MOZ_OVERRIDE;
NS_IMETHOD SetIsIPC(bool b) MOZ_OVERRIDE { return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD Redraw(const gfxRect&) { return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD Swap(mozilla::ipc::Shmem& aBack,
int32_t x, int32_t y, int32_t w, int32_t h)
{ return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHOD Swap(uint32_t nativeID,
int32_t x, int32_t y, int32_t w, int32_t h)
{ return NS_ERROR_NOT_IMPLEMENTED; }
void SynthesizeGLError(GLenum err);
void SynthesizeGLError(GLenum err, const char *fmt, ...);
void ErrorInvalidEnum(const char *fmt = 0, ...);
void ErrorInvalidOperation(const char *fmt = 0, ...);
void ErrorInvalidValue(const char *fmt = 0, ...);
void ErrorInvalidFramebufferOperation(const char *fmt = 0, ...);
void ErrorInvalidEnumInfo(const char *info, GLenum enumvalue);
void ErrorOutOfMemory(const char *fmt = 0, ...);
const char *ErrorName(GLenum error);
/**
* Return displayable name for GLenum.
* This version is like gl::GLenumToStr but with out the GL_ prefix to
* keep consistency with how errors are reported from WebGL.
*/
static const char *EnumName(GLenum glenum);
bool IsTextureFormatCompressed(GLenum format);
void DummyFramebufferOperation(const char *info);
WebGLTexture* activeBoundTextureForTarget(GLenum target) const {
MOZ_ASSERT(!IsTextureBinding(target));
return target == LOCAL_GL_TEXTURE_2D ? mBound2DTextures[mActiveTexture]
: mBoundCubeMapTextures[mActiveTexture];
}
already_AddRefed<CanvasLayer> GetCanvasLayer(nsDisplayListBuilder* aBuilder,
CanvasLayer *aOldLayer,
LayerManager *aManager) MOZ_OVERRIDE;
// Note that 'clean' here refers to its invalidation state, not the
// contents of the buffer.
void MarkContextClean() MOZ_OVERRIDE { mInvalidated = false; }
gl::GLContext* GL() const { return gl; }
bool IsPremultAlpha() const { return mOptions.premultipliedAlpha; }
bool PresentScreenBuffer();
// a number that increments every time we have an event that causes
// all context resources to be lost.
uint32_t Generation() { return mGeneration.value(); }
// Returns null if the current bound FB is not likely complete.
const WebGLRectangleObject* CurValidFBRectObject() const;
static const size_t kMaxColorAttachments = 16;
// This is similar to GLContext::ClearSafely, but tries to minimize the
// amount of work it does.
// It only clears the buffers we specify, and can reset its state without
// first having to query anything, as WebGL knows its state at all times.
void ForceClearFramebufferWithDefaultValues(GLbitfield mask, const bool colorAttachmentsMask[kMaxColorAttachments]);
// Calls ForceClearFramebufferWithDefaultValues() for the Context's 'screen'.
void ClearScreen();
void ClearBackbufferIfNeeded();
bool MinCapabilityMode() const { return mMinCapability; }
void UpdateContextLossStatus();
void EnqueueUpdateContextLossStatus();
static void ContextLossCallbackStatic(nsITimer* timer, void* thisPointer);
void RunContextLossTimer();
void TerminateContextLossTimer();
bool TryToRestoreContext();
void AssertCachedBindings();
void AssertCachedState();
// WebIDL WebGLRenderingContext API
dom::HTMLCanvasElement* GetCanvas() const { return mCanvasElement; }
GLsizei DrawingBufferWidth() const { return IsContextLost() ? 0 : mWidth; }
GLsizei DrawingBufferHeight() const { return IsContextLost() ? 0 : mHeight; }
void GetContextAttributes(dom::Nullable<dom::WebGLContextAttributes>& retval);
bool IsContextLost() const { return mContextStatus != ContextNotLost; }
void GetSupportedExtensions(JSContext *cx, dom::Nullable< nsTArray<nsString> > &retval);
void GetExtension(JSContext* cx, const nsAString& aName,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& rv);
void ActiveTexture(GLenum texture);
void AttachShader(WebGLProgram* program, WebGLShader* shader);
void BindAttribLocation(WebGLProgram* program, GLuint location,
const nsAString& name);
void BindFramebuffer(GLenum target, WebGLFramebuffer* wfb);
void BindRenderbuffer(GLenum target, WebGLRenderbuffer* wrb);
void BindTexture(GLenum target, WebGLTexture *tex);
void BindVertexArray(WebGLVertexArray *vao);
void BlendColor(GLclampf r, GLclampf g, GLclampf b, GLclampf a);
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);
GLenum CheckFramebufferStatus(GLenum target);
void Clear(GLbitfield mask);
void ClearColor(GLclampf r, GLclampf g, GLclampf b, GLclampf a);
void ClearDepth(GLclampf v);
void ClearStencil(GLint v);
void ColorMask(WebGLboolean r, WebGLboolean g, WebGLboolean b, WebGLboolean a);
void CompileShader(WebGLShader *shader);
void CompressedTexImage2D(GLenum target, GLint level,
GLenum internalformat, GLsizei width,
GLsizei height, GLint border,
const dom::ArrayBufferView& view);
void CompressedTexSubImage2D(GLenum target, GLint level,
GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height,
GLenum format,
const dom::ArrayBufferView& view);
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);
already_AddRefed<WebGLFramebuffer> CreateFramebuffer();
already_AddRefed<WebGLProgram> CreateProgram();
already_AddRefed<WebGLRenderbuffer> CreateRenderbuffer();
already_AddRefed<WebGLTexture> CreateTexture();
already_AddRefed<WebGLShader> CreateShader(GLenum type);
already_AddRefed<WebGLVertexArray> CreateVertexArray();
void CullFace(GLenum face);
void DeleteFramebuffer(WebGLFramebuffer *fbuf);
void DeleteProgram(WebGLProgram *prog);
void DeleteRenderbuffer(WebGLRenderbuffer *rbuf);
void DeleteShader(WebGLShader *shader);
void DeleteVertexArray(WebGLVertexArray *vao);
void DeleteTexture(WebGLTexture *tex);
void DepthFunc(GLenum func);
void DepthMask(WebGLboolean b);
void DepthRange(GLclampf zNear, GLclampf zFar);
void DetachShader(WebGLProgram *program, WebGLShader *shader);
void DrawBuffers(const dom::Sequence<GLenum>& buffers);
void Flush();
void Finish();
void FramebufferRenderbuffer(GLenum target, GLenum attachment,
GLenum rbtarget, WebGLRenderbuffer *wrb);
void FramebufferTexture2D(GLenum target, GLenum attachment,
GLenum textarget, WebGLTexture *tobj,
GLint level);
void FrontFace(GLenum mode);
void GenerateMipmap(GLenum target);
already_AddRefed<WebGLActiveInfo> GetActiveAttrib(WebGLProgram *prog,
GLuint index);
already_AddRefed<WebGLActiveInfo> GetActiveUniform(WebGLProgram *prog,
GLuint index);
void GetAttachedShaders(WebGLProgram* prog,
dom::Nullable< nsTArray<WebGLShader*> > &retval);
GLint GetAttribLocation(WebGLProgram* prog, const nsAString& name);
JS::Value GetBufferParameter(GLenum target, GLenum pname);
void GetBufferParameter(JSContext* /* unused */, GLenum target,
GLenum pname,
JS::MutableHandle<JS::Value> retval) {
retval.set(GetBufferParameter(target, pname));
}
GLenum GetError();
JS::Value GetFramebufferAttachmentParameter(JSContext* cx,
GLenum target,
GLenum attachment,
GLenum pname,
ErrorResult& rv);
void GetFramebufferAttachmentParameter(JSContext* cx,
GLenum target,
GLenum attachment,
GLenum pname,
JS::MutableHandle<JS::Value> retval,
ErrorResult& rv) {
retval.set(GetFramebufferAttachmentParameter(cx, target, attachment,
pname, rv));
}
JS::Value GetProgramParameter(WebGLProgram *prog, GLenum pname);
void GetProgramParameter(JSContext* /* unused */, WebGLProgram *prog,
GLenum pname,
JS::MutableHandle<JS::Value> retval) {
retval.set(GetProgramParameter(prog, pname));
}
void GetProgramInfoLog(WebGLProgram *prog, nsACString& retval);
void GetProgramInfoLog(WebGLProgram *prog, nsAString& retval);
JS::Value GetRenderbufferParameter(GLenum target, GLenum pname);
void GetRenderbufferParameter(JSContext* /* unused */,
GLenum target, GLenum pname,
JS::MutableHandle<JS::Value> retval) {
retval.set(GetRenderbufferParameter(target, pname));
}
JS::Value GetShaderParameter(WebGLShader *shader, GLenum pname);
void GetShaderParameter(JSContext* /* unused */, WebGLShader *shader,
GLenum pname,
JS::MutableHandle<JS::Value> retval) {
retval.set(GetShaderParameter(shader, pname));
}
already_AddRefed<WebGLShaderPrecisionFormat>
GetShaderPrecisionFormat(GLenum shadertype, GLenum precisiontype);
void GetShaderInfoLog(WebGLShader *shader, nsACString& retval);
void GetShaderInfoLog(WebGLShader *shader, nsAString& retval);
void GetShaderSource(WebGLShader *shader, nsAString& retval);
void GetShaderTranslatedSource(WebGLShader *shader, nsAString& retval);
JS::Value GetTexParameter(GLenum target, GLenum pname);
void GetTexParameter(JSContext * /* unused */, GLenum target,
GLenum pname,
JS::MutableHandle<JS::Value> retval) {
retval.set(GetTexParameter(target, pname));
}
JS::Value GetUniform(JSContext* cx, WebGLProgram *prog,
WebGLUniformLocation *location);
void GetUniform(JSContext* cx, WebGLProgram *prog,
WebGLUniformLocation *location,
JS::MutableHandle<JS::Value> retval) {
retval.set(GetUniform(cx, prog, location));
}
already_AddRefed<WebGLUniformLocation>
GetUniformLocation(WebGLProgram *prog, const nsAString& name);
void Hint(GLenum target, GLenum mode);
bool IsFramebuffer(WebGLFramebuffer *fb);
bool IsProgram(WebGLProgram *prog);
bool IsRenderbuffer(WebGLRenderbuffer *rb);
bool IsShader(WebGLShader *shader);
bool IsTexture(WebGLTexture *tex);
bool IsVertexArray(WebGLVertexArray *vao);
void LineWidth(GLfloat width);
void LinkProgram(WebGLProgram *program);
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,
const Nullable<dom::ArrayBufferView> &pixels,
ErrorResult& rv);
void RenderbufferStorage(GLenum target, GLenum internalformat,
GLsizei width, GLsizei height);
void SampleCoverage(GLclampf value, WebGLboolean invert);
void Scissor(GLint x, GLint y, GLsizei width, GLsizei height);
void ShaderSource(WebGLShader *shader, const nsAString& source);
void StencilFunc(GLenum func, GLint ref, GLuint mask);
void StencilFuncSeparate(GLenum face, GLenum func, GLint ref,
GLuint mask);
void StencilMask(GLuint mask);
void StencilMaskSeparate(GLenum face, GLuint mask);
void StencilOp(GLenum sfail, GLenum dpfail, GLenum dppass);
void StencilOpSeparate(GLenum face, GLenum sfail, GLenum dpfail,
GLenum dppass);
void TexImage2D(GLenum target, GLint level,
GLenum internalformat, GLsizei width,
GLsizei height, GLint border, GLenum format,
GLenum type,
const Nullable<dom::ArrayBufferView> &pixels,
ErrorResult& rv);
void TexImage2D(GLenum target, GLint level,
GLenum internalformat, GLenum format, GLenum type,
dom::ImageData* pixels, ErrorResult& rv);
// Allow whatever element types the bindings are willing to pass
// us in TexImage2D
bool TexImageFromVideoElement(GLenum target, GLint level,
GLenum internalformat, GLenum format, GLenum type,
mozilla::dom::Element& image);
template<class ElementType>
void TexImage2D(GLenum target, GLint level,
GLenum internalformat, GLenum format, GLenum type,
ElementType& elt, ErrorResult& rv)
{
if (IsContextLost())
return;
WebGLTexture* tex = activeBoundTextureForTarget(target);
if (!tex)
return ErrorInvalidOperation("no texture is bound to this target");
// Trying to handle the video by GPU directly first
if (TexImageFromVideoElement(target, level, internalformat, format, type, elt)) {
return;
}
RefPtr<gfx::DataSourceSurface> data;
WebGLTexelFormat srcFormat;
nsLayoutUtils::SurfaceFromElementResult res = SurfaceFromElement(elt);
rv = SurfaceFromElementResultToImageSurface(res, data,
&srcFormat);
if (rv.Failed() || !data)
return;
gfx::IntSize size = data->GetSize();
uint32_t byteLength = data->Stride() * size.height;
return TexImage2D_base(target, level, internalformat,
size.width, size.height, data->Stride(),
0, format, type, data->GetData(), byteLength,
-1, srcFormat, mPixelStorePremultiplyAlpha);
}
void TexParameterf(GLenum target, GLenum pname, GLfloat param) {
TexParameter_base(target, pname, nullptr, &param);
}
void TexParameteri(GLenum target, GLenum pname, GLint param) {
TexParameter_base(target, pname, &param, nullptr);
}
void TexSubImage2D(GLenum target, GLint level,
GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height, GLenum format,
GLenum type,
const Nullable<dom::ArrayBufferView> &pixels,
ErrorResult& rv);
void TexSubImage2D(GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLenum format,
GLenum type, dom::ImageData* pixels, ErrorResult& rv);
// Allow whatever element types the bindings are willing to pass
// us in TexSubImage2D
template<class ElementType>
void TexSubImage2D(GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLenum format,
GLenum type, ElementType& elt, ErrorResult& rv)
{
if (IsContextLost())
return;
// Trying to handle the video by GPU directly first
if (TexImageFromVideoElement(target, level, format, format, type, elt)) {
return;
}
RefPtr<gfx::DataSourceSurface> data;
WebGLTexelFormat srcFormat;
nsLayoutUtils::SurfaceFromElementResult res = SurfaceFromElement(elt);
rv = SurfaceFromElementResultToImageSurface(res, data,
&srcFormat);
if (rv.Failed() || !data)
return;
gfx::IntSize size = data->GetSize();
uint32_t byteLength = data->Stride() * size.height;
return TexSubImage2D_base(target, level, xoffset, yoffset,
size.width, size.height,
data->Stride(), format, type,
data->GetData(), byteLength,
-1, srcFormat, mPixelStorePremultiplyAlpha);
}
void Uniform1i(WebGLUniformLocation* location, GLint x);
void Uniform2i(WebGLUniformLocation* location, GLint x, GLint y);
void Uniform3i(WebGLUniformLocation* location, GLint x, GLint y,
GLint z);
void Uniform4i(WebGLUniformLocation* location, GLint x, GLint y,
GLint z, GLint w);
void Uniform1f(WebGLUniformLocation* location, GLfloat x);
void Uniform2f(WebGLUniformLocation* location, GLfloat x, GLfloat y);
void Uniform3f(WebGLUniformLocation* location, GLfloat x, GLfloat y,
GLfloat z);
void Uniform4f(WebGLUniformLocation* location, GLfloat x, GLfloat y,
GLfloat z, GLfloat w);
void Uniform1iv(WebGLUniformLocation* location,
const dom::Int32Array& arr) {
arr.ComputeLengthAndData();
Uniform1iv_base(location, arr.Length(), arr.Data());
}
void Uniform1iv(WebGLUniformLocation* location,
const dom::Sequence<GLint>& arr) {
Uniform1iv_base(location, arr.Length(), arr.Elements());
}
void Uniform1iv_base(WebGLUniformLocation* location, uint32_t arrayLength,
const GLint* data);
void Uniform2iv(WebGLUniformLocation* location,
const dom::Int32Array& arr) {
arr.ComputeLengthAndData();
Uniform2iv_base(location, arr.Length(), arr.Data());
}
void Uniform2iv(WebGLUniformLocation* location,
const dom::Sequence<GLint>& arr) {
Uniform2iv_base(location, arr.Length(), arr.Elements());
}
void Uniform2iv_base(WebGLUniformLocation* location, uint32_t arrayLength,
const GLint* data);
void Uniform3iv(WebGLUniformLocation* location,
const dom::Int32Array& arr) {
arr.ComputeLengthAndData();
Uniform3iv_base(location, arr.Length(), arr.Data());
}
void Uniform3iv(WebGLUniformLocation* location,
const dom::Sequence<GLint>& arr) {
Uniform3iv_base(location, arr.Length(), arr.Elements());
}
void Uniform3iv_base(WebGLUniformLocation* location, uint32_t arrayLength,
const GLint* data);
void Uniform4iv(WebGLUniformLocation* location,
const dom::Int32Array& arr) {
arr.ComputeLengthAndData();
Uniform4iv_base(location, arr.Length(), arr.Data());
}
void Uniform4iv(WebGLUniformLocation* location,
const dom::Sequence<GLint>& arr) {
Uniform4iv_base(location, arr.Length(), arr.Elements());
}
void Uniform4iv_base(WebGLUniformLocation* location, uint32_t arrayLength,
const GLint* data);
void Uniform1fv(WebGLUniformLocation* location,
const dom::Float32Array& arr) {
arr.ComputeLengthAndData();
Uniform1fv_base(location, arr.Length(), arr.Data());
}
void Uniform1fv(WebGLUniformLocation* location,
const dom::Sequence<GLfloat>& arr) {
Uniform1fv_base(location, arr.Length(), arr.Elements());
}
void Uniform1fv_base(WebGLUniformLocation* location, uint32_t arrayLength,
const GLfloat* data);
void Uniform2fv(WebGLUniformLocation* location,
const dom::Float32Array& arr) {
arr.ComputeLengthAndData();
Uniform2fv_base(location, arr.Length(), arr.Data());
}
void Uniform2fv(WebGLUniformLocation* location,
const dom::Sequence<GLfloat>& arr) {
Uniform2fv_base(location, arr.Length(), arr.Elements());
}
void Uniform2fv_base(WebGLUniformLocation* location, uint32_t arrayLength,
const GLfloat* data);
void Uniform3fv(WebGLUniformLocation* location,
const dom::Float32Array& arr) {
arr.ComputeLengthAndData();
Uniform3fv_base(location, arr.Length(), arr.Data());
}
void Uniform3fv(WebGLUniformLocation* location,
const dom::Sequence<GLfloat>& arr) {
Uniform3fv_base(location, arr.Length(), arr.Elements());
}
void Uniform3fv_base(WebGLUniformLocation* location, uint32_t arrayLength,
const GLfloat* data);
void Uniform4fv(WebGLUniformLocation* location,
const dom::Float32Array& arr) {
arr.ComputeLengthAndData();
Uniform4fv_base(location, arr.Length(), arr.Data());
}
void Uniform4fv(WebGLUniformLocation* location,
const dom::Sequence<GLfloat>& arr) {
Uniform4fv_base(location, arr.Length(), arr.Elements());
}
void Uniform4fv_base(WebGLUniformLocation* location, uint32_t arrayLength,
const GLfloat* data);
void UniformMatrix2fv(WebGLUniformLocation* location,
WebGLboolean transpose,
const dom::Float32Array &value) {
value.ComputeLengthAndData();
UniformMatrix2fv_base(location, transpose, value.Length(), value.Data());
}
void UniformMatrix2fv(WebGLUniformLocation* location,
WebGLboolean transpose,
const dom::Sequence<float> &value) {
UniformMatrix2fv_base(location, transpose, value.Length(),
value.Elements());
}
void UniformMatrix2fv_base(WebGLUniformLocation* location,
WebGLboolean transpose, uint32_t arrayLength,
const float* data);
void UniformMatrix3fv(WebGLUniformLocation* location,
WebGLboolean transpose,
const dom::Float32Array &value) {
value.ComputeLengthAndData();
UniformMatrix3fv_base(location, transpose, value.Length(), value.Data());
}
void UniformMatrix3fv(WebGLUniformLocation* location,
WebGLboolean transpose,
const dom::Sequence<float> &value) {
UniformMatrix3fv_base(location, transpose, value.Length(),
value.Elements());
}
void UniformMatrix3fv_base(WebGLUniformLocation* location,
WebGLboolean transpose, uint32_t arrayLength,
const float* data);
void UniformMatrix4fv(WebGLUniformLocation* location,
WebGLboolean transpose,
const dom::Float32Array &value) {
value.ComputeLengthAndData();
UniformMatrix4fv_base(location, transpose, value.Length(), value.Data());
}
void UniformMatrix4fv(WebGLUniformLocation* location,
WebGLboolean transpose,
const dom::Sequence<float> &value) {
UniformMatrix4fv_base(location, transpose, value.Length(),
value.Elements());
}
void UniformMatrix4fv_base(WebGLUniformLocation* location,
WebGLboolean transpose, uint32_t arrayLength,
const float* data);
void UseProgram(WebGLProgram *prog);
bool ValidateAttribArraySetter(const char* name, uint32_t cnt, uint32_t arrayLength);
bool ValidateUniformArraySetter(const char* name, uint32_t expectedElemSize, WebGLUniformLocation *location_object,
GLint& location, uint32_t& numElementsToUpload, uint32_t arrayLength);
bool ValidateUniformMatrixArraySetter(const char* name, int dim, WebGLUniformLocation *location_object,
GLint& location, uint32_t& numElementsToUpload, uint32_t arrayLength,
WebGLboolean aTranspose);
bool ValidateUniformSetter(const char* name, WebGLUniformLocation *location_object, GLint& location);
void ValidateProgram(WebGLProgram *prog);
bool ValidateUniformLocation(const char* info, WebGLUniformLocation *location_object);
bool ValidateSamplerUniformSetter(const char* info,
WebGLUniformLocation *location,
GLint value);
void Viewport(GLint x, GLint y, GLsizei width, GLsizei height);
// -----------------------------------------------------------------------------
// WEBGL_lose_context
public:
void LoseContext();
void RestoreContext();
// -----------------------------------------------------------------------------
// Asynchronous Queries (WebGLContextAsyncQueries.cpp)
public:
already_AddRefed<WebGLQuery> CreateQuery();
void DeleteQuery(WebGLQuery *query);
void BeginQuery(GLenum target, WebGLQuery *query);
void EndQuery(GLenum target);
bool IsQuery(WebGLQuery *query);
already_AddRefed<WebGLQuery> GetQuery(GLenum target, GLenum pname);
JS::Value GetQueryObject(JSContext* cx, WebGLQuery *query, GLenum pname);
void GetQueryObject(JSContext* cx, WebGLQuery *query, GLenum pname,
JS::MutableHandle<JS::Value> retval) {
retval.set(GetQueryObject(cx, query, pname));
}
private:
// ANY_SAMPLES_PASSED(_CONSERVATIVE) slot
WebGLRefPtr<WebGLQuery> mActiveOcclusionQuery;
// LOCAL_GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN slot
WebGLRefPtr<WebGLQuery> mActiveTransformFeedbackQuery;
WebGLRefPtr<WebGLQuery>* GetQueryTargetSlot(GLenum target, const char* infos);
// -----------------------------------------------------------------------------
// Buffer Objects (WebGLContextBuffers.cpp)
public:
void BindBuffer(GLenum target, WebGLBuffer* buf);
void BindBufferBase(GLenum target, GLuint index, WebGLBuffer* buffer);
void BindBufferRange(GLenum target, GLuint index, WebGLBuffer* buffer,
WebGLintptr offset, WebGLsizeiptr size);
void BufferData(GLenum target, WebGLsizeiptr size, GLenum usage);
void BufferData(GLenum target, const dom::ArrayBufferView &data,
GLenum usage);
void BufferData(GLenum target,
const Nullable<dom::ArrayBuffer> &maybeData,
GLenum usage);
void BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
const dom::ArrayBufferView &data);
void BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
const Nullable<dom::ArrayBuffer> &maybeData);
already_AddRefed<WebGLBuffer> CreateBuffer();
void DeleteBuffer(WebGLBuffer *buf);
bool IsBuffer(WebGLBuffer *buffer);
private:
// ARRAY_BUFFER slot
WebGLRefPtr<WebGLBuffer> mBoundArrayBuffer;
// TRANSFORM_FEEDBACK_BUFFER slot
WebGLRefPtr<WebGLBuffer> mBoundTransformFeedbackBuffer;
// these two functions emit INVALID_ENUM for invalid `target`.
WebGLRefPtr<WebGLBuffer>* GetBufferSlotByTarget(GLenum target, const char* infos);
WebGLRefPtr<WebGLBuffer>* GetBufferSlotByTargetIndexed(GLenum target, GLuint index, const char* infos);
bool ValidateBufferUsageEnum(GLenum target, const char* infos);
// -----------------------------------------------------------------------------
// State and State Requests (WebGLContextState.cpp)
public:
void Disable(GLenum cap);
void Enable(GLenum cap);
JS::Value GetParameter(JSContext* cx, GLenum pname, ErrorResult& rv);
void GetParameter(JSContext* cx, GLenum pname,
JS::MutableHandle<JS::Value> retval, ErrorResult& rv) {
retval.set(GetParameter(cx, pname, rv));
}
void GetParameterIndexed(JSContext* cx, GLenum pname, GLuint index,
JS::MutableHandle<JS::Value> retval);
bool IsEnabled(GLenum cap);
private:
// State tracking slots
realGLboolean mDitherEnabled;
realGLboolean mRasterizerDiscardEnabled;
realGLboolean mScissorTestEnabled;
bool ValidateCapabilityEnum(GLenum cap, const char* info);
realGLboolean* GetStateTrackingSlot(GLenum cap);
// -----------------------------------------------------------------------------
// Vertices Feature (WebGLContextVertices.cpp)
public:
void DrawArrays(GLenum mode, GLint first, GLsizei count);
void DrawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei primcount);
void DrawElements(GLenum mode, GLsizei count, GLenum type, WebGLintptr byteOffset);
void DrawElementsInstanced(GLenum mode, GLsizei count, GLenum type,
WebGLintptr byteOffset, GLsizei primcount);
void EnableVertexAttribArray(GLuint index);
void DisableVertexAttribArray(GLuint index);
JS::Value GetVertexAttrib(JSContext* cx, GLuint index, GLenum pname,
ErrorResult& rv);
void GetVertexAttrib(JSContext* cx, GLuint index, GLenum pname,
JS::MutableHandle<JS::Value> retval,
ErrorResult& rv) {
retval.set(GetVertexAttrib(cx, index, pname, rv));
}
WebGLsizeiptr GetVertexAttribOffset(GLuint index, GLenum pname);
void VertexAttrib1f(GLuint index, GLfloat x0);
void VertexAttrib2f(GLuint index, GLfloat x0, GLfloat x1);
void VertexAttrib3f(GLuint index, GLfloat x0, GLfloat x1,
GLfloat x2);
void VertexAttrib4f(GLuint index, GLfloat x0, GLfloat x1,
GLfloat x2, GLfloat x3);
void VertexAttrib1fv(GLuint idx, const dom::Float32Array &arr) {
arr.ComputeLengthAndData();
VertexAttrib1fv_base(idx, arr.Length(), arr.Data());
}
void VertexAttrib1fv(GLuint idx, const dom::Sequence<GLfloat>& arr) {
VertexAttrib1fv_base(idx, arr.Length(), arr.Elements());
}
void VertexAttrib2fv(GLuint idx, const dom::Float32Array &arr) {
arr.ComputeLengthAndData();
VertexAttrib2fv_base(idx, arr.Length(), arr.Data());
}
void VertexAttrib2fv(GLuint idx, const dom::Sequence<GLfloat>& arr) {
VertexAttrib2fv_base(idx, arr.Length(), arr.Elements());
}
void VertexAttrib3fv(GLuint idx, const dom::Float32Array &arr) {
arr.ComputeLengthAndData();
VertexAttrib3fv_base(idx, arr.Length(), arr.Data());
}
void VertexAttrib3fv(GLuint idx, const dom::Sequence<GLfloat>& arr) {
VertexAttrib3fv_base(idx, arr.Length(), arr.Elements());
}
void VertexAttrib4fv(GLuint idx, const dom::Float32Array &arr) {
arr.ComputeLengthAndData();
VertexAttrib4fv_base(idx, arr.Length(), arr.Data());
}
void VertexAttrib4fv(GLuint idx, const dom::Sequence<GLfloat>& arr) {
VertexAttrib4fv_base(idx, arr.Length(), arr.Elements());
}
void VertexAttribPointer(GLuint index, GLint size, GLenum type,
WebGLboolean normalized, GLsizei stride,
WebGLintptr byteOffset);
void VertexAttribDivisor(GLuint index, GLuint divisor);
private:
// Cache the max number of vertices and instances that can be read from
// bound VBOs (result of ValidateBuffers).
bool mBufferFetchingIsVerified;
bool mBufferFetchingHasPerVertex;
uint32_t mMaxFetchedVertices;
uint32_t mMaxFetchedInstances;
inline void InvalidateBufferFetching()
{
mBufferFetchingIsVerified = false;
mBufferFetchingHasPerVertex = false;
mMaxFetchedVertices = 0;
mMaxFetchedInstances = 0;
}
bool DrawArrays_check(GLint first, GLsizei count, GLsizei primcount, const char* info);
bool DrawElements_check(GLsizei count, GLenum type, WebGLintptr byteOffset,
GLsizei primcount, const char* info,
GLuint* out_upperBound);
bool DrawInstanced_check(const char* info);
void Draw_cleanup();
void VertexAttrib1fv_base(GLuint idx, uint32_t arrayLength, const GLfloat* ptr);
void VertexAttrib2fv_base(GLuint idx, uint32_t arrayLength, const GLfloat* ptr);
void VertexAttrib3fv_base(GLuint idx, uint32_t arrayLength, const GLfloat* ptr);
void VertexAttrib4fv_base(GLuint idx, uint32_t arrayLength, const GLfloat* ptr);
bool ValidateBufferFetching(const char *info);
bool BindArrayAttribToLocation0(WebGLProgram *program);
// -----------------------------------------------------------------------------
// PROTECTED
protected:
virtual ~WebGLContext();
void SetFakeBlackStatus(WebGLContextFakeBlackStatus x) {
mFakeBlackStatus = x;
}
// Returns the current fake-black-status, except if it was Unknown,
// in which case this function resolves it first, so it never returns Unknown.
WebGLContextFakeBlackStatus ResolvedFakeBlackStatus();
void BindFakeBlackTextures();
void UnbindFakeBlackTextures();
WebGLVertexAttrib0Status WhatDoesVertexAttrib0Need();
bool DoFakeVertexAttrib0(GLuint vertexCount);
void UndoFakeVertexAttrib0();
static CheckedUint32 GetImageSize(GLsizei height,
GLsizei width,
uint32_t pixelSize,
uint32_t alignment);
// Returns x rounded to the next highest multiple of y.
static CheckedUint32 RoundedToNextMultipleOf(CheckedUint32 x, CheckedUint32 y) {
return ((x + y - 1) / y) * y;
}
nsRefPtr<gl::GLContext> gl;
CheckedUint32 mGeneration;
WebGLContextOptions mOptions;
bool mInvalidated;
bool mResetLayer;
bool mOptionsFrozen;
bool mMinCapability;
bool mDisableExtensions;
bool mIsMesa;
bool mLoseContextOnMemoryPressure;
bool mCanLoseContextInForeground;
bool mRestoreWhenVisible;
bool mShouldPresent;
bool mBackbufferNeedsClear;
bool mDisableFragHighP;
template<typename WebGLObjectType>
void DeleteWebGLObjectsArray(nsTArray<WebGLObjectType>& array);
GLuint mActiveTexture;
// glGetError sources:
bool mEmitContextLostErrorOnce;
GLenum mWebGLError;
GLenum mUnderlyingGLError;
GLenum GetAndFlushUnderlyingGLErrors();
// whether shader validation is supported
bool mShaderValidation;
// some GL constants
int32_t mGLMaxVertexAttribs;
int32_t mGLMaxTextureUnits;
int32_t mGLMaxTextureSize;
int32_t mGLMaxCubeMapTextureSize;
int32_t mGLMaxRenderbufferSize;
int32_t mGLMaxTextureImageUnits;
int32_t mGLMaxVertexTextureImageUnits;
int32_t mGLMaxVaryingVectors;
int32_t mGLMaxFragmentUniformVectors;
int32_t mGLMaxVertexUniformVectors;
int32_t mGLMaxColorAttachments;
int32_t mGLMaxDrawBuffers;
uint32_t mGLMaxTransformFeedbackSeparateAttribs;
// Represents current status of the context with respect to context loss.
// That is, whether the context is lost, and what part of the context loss
// process we currently are at.
// This is used to support the WebGL spec's asyncronous nature in handling
// context loss.
enum ContextStatus {
// The context is stable; there either are none or we don't know of any.
ContextNotLost,
// The context has been lost, but we have not yet sent an event to the
// script informing it of this.
ContextLostAwaitingEvent,
// The context has been lost, and we have sent the script an event
// informing it of this.
ContextLost,
// The context is lost, an event has been sent to the script, and the
// script correctly handled the event. We are waiting for the context to
// be restored.
ContextLostAwaitingRestore
};
// -------------------------------------------------------------------------
// WebGL extensions (implemented in WebGLContextExtensions.cpp)
typedef EnumeratedArray<WebGLExtensionID,
WebGLExtensionID::Max,
nsRefPtr<WebGLExtensionBase>> ExtensionsArrayType;
ExtensionsArrayType mExtensions;
// enable an extension. the extension should not be enabled before.
void EnableExtension(WebGLExtensionID ext);
// returns true if the extension has been enabled by calling getExtension.
bool IsExtensionEnabled(WebGLExtensionID ext) const;
// returns true if the extension is supported for this JSContext (this decides what getSupportedExtensions exposes)
bool IsExtensionSupported(JSContext *cx, WebGLExtensionID ext) const;
bool IsExtensionSupported(WebGLExtensionID ext) const;
static const char* GetExtensionString(WebGLExtensionID ext);
nsTArray<GLenum> mCompressedTextureFormats;
// -------------------------------------------------------------------------
// WebGL 2 specifics (implemented in WebGL2Context.cpp)
virtual bool IsWebGL2() const = 0;
bool InitWebGL2();
// -------------------------------------------------------------------------
// Validation functions (implemented in WebGLContextValidate.cpp)
GLenum BaseTexFormat(GLenum internalFormat) const;
bool InitAndValidateGL();
bool ValidateBlendEquationEnum(GLenum cap, const char *info);
bool ValidateBlendFuncDstEnum(GLenum mode, const char *info);
bool ValidateBlendFuncSrcEnum(GLenum mode, const char *info);
bool ValidateBlendFuncEnumsCompatibility(GLenum sfactor, GLenum dfactor, const char *info);
bool ValidateTextureTargetEnum(GLenum target, const char *info);
bool ValidateComparisonEnum(GLenum target, const char *info);
bool ValidateStencilOpEnum(GLenum action, const char *info);
bool ValidateFaceEnum(GLenum face, const char *info);
bool ValidateTexInputData(GLenum type, int jsArrayType, WebGLTexImageFunc func);
bool ValidateDrawModeEnum(GLenum mode, const char *info);
bool ValidateAttribIndex(GLuint index, const char *info);
bool ValidateStencilParamsForDrawCall();
bool ValidateGLSLVariableName(const nsAString& name, const char *info);
bool ValidateGLSLCharacter(char16_t c);
bool ValidateGLSLString(const nsAString& string, const char *info);
bool ValidateCopyTexImage(GLenum format, WebGLTexImageFunc func);
bool ValidateTexImage(GLuint dims, GLenum target,
GLint level, GLint internalFormat,
GLint xoffset, GLint yoffset, GLint zoffset,
GLint width, GLint height, GLint depth,
GLint border, GLenum format, GLenum type,
WebGLTexImageFunc func);
bool ValidateTexImageTarget(GLuint dims, GLenum target, WebGLTexImageFunc func);
bool ValidateTexImageFormat(GLenum format, WebGLTexImageFunc func);
bool ValidateTexImageType(GLenum type, WebGLTexImageFunc func);
bool ValidateTexImageFormatAndType(GLenum format, GLenum type, WebGLTexImageFunc func);
bool ValidateTexImageSize(GLenum target, GLint level,
GLint width, GLint height, GLint depth,
WebGLTexImageFunc func);
bool ValidateTexSubImageSize(GLint x, GLint y, GLint z,
GLsizei width, GLsizei height, GLsizei depth,
GLsizei baseWidth, GLsizei baseHeight, GLsizei baseDepth,
WebGLTexImageFunc func);
bool ValidateCompTexImageSize(GLenum target, GLint level, GLenum format,
GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height,
GLsizei levelWidth, GLsizei levelHeight,
WebGLTexImageFunc func);
bool ValidateCompTexImageDataSize(GLint level, GLenum format,
GLsizei width, GLsizei height,
uint32_t byteLength, WebGLTexImageFunc func);
static uint32_t GetBitsPerTexel(GLenum format, GLenum type);
void Invalidate();
void DestroyResourcesAndContext();
void MakeContextCurrent() const;
// helpers
void TexImage2D_base(GLenum target, GLint level, GLenum internalformat,
GLsizei width, GLsizei height, GLsizei srcStrideOrZero, GLint border,
GLenum format, GLenum type,
void *data, uint32_t byteLength,
int jsArrayType,
WebGLTexelFormat srcFormat, bool srcPremultiplied);
void TexSubImage2D_base(GLenum target, GLint level,
GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height, GLsizei srcStrideOrZero,
GLenum format, GLenum type,
void *pixels, uint32_t byteLength,
int jsArrayType,
WebGLTexelFormat srcFormat, bool srcPremultiplied);
void TexParameter_base(GLenum target, GLenum pname,
GLint *intParamPtr, GLfloat *floatParamPtr);
void ConvertImage(size_t width, size_t height, size_t srcStride, size_t dstStride,
const uint8_t* src, uint8_t *dst,
WebGLTexelFormat srcFormat, bool srcPremultiplied,
WebGLTexelFormat dstFormat, bool dstPremultiplied,
size_t dstTexelSize);
template<class ElementType>
nsLayoutUtils::SurfaceFromElementResult SurfaceFromElement(ElementType* aElement) {
MOZ_ASSERT(aElement);
uint32_t flags =
nsLayoutUtils::SFE_WANT_IMAGE_SURFACE;
if (mPixelStoreColorspaceConversion == LOCAL_GL_NONE)
flags |= nsLayoutUtils::SFE_NO_COLORSPACE_CONVERSION;
if (!mPixelStorePremultiplyAlpha)
flags |= nsLayoutUtils::SFE_PREFER_NO_PREMULTIPLY_ALPHA;
return nsLayoutUtils::SurfaceFromElement(aElement, flags);
}
template<class ElementType>
nsLayoutUtils::SurfaceFromElementResult SurfaceFromElement(ElementType& aElement)
{
return SurfaceFromElement(&aElement);
}
nsresult SurfaceFromElementResultToImageSurface(nsLayoutUtils::SurfaceFromElementResult& res,
RefPtr<gfx::DataSourceSurface>& imageOut,
WebGLTexelFormat *format);
void CopyTexSubImage2D_base(GLenum target,
GLint level,
GLenum internalformat,
GLint xoffset,
GLint yoffset,
GLint x,
GLint y,
GLsizei width,
GLsizei height,
bool sub);
// Returns false if aObject is null or not valid
template<class ObjectType>
bool ValidateObject(const char* info, ObjectType *aObject);
// Returns false if aObject is not valid. Considers null to be valid.
template<class ObjectType>
bool ValidateObjectAllowNull(const char* info, ObjectType *aObject);
// Returns false if aObject is not valid, but considers deleted
// objects and null objects valid.
template<class ObjectType>
bool ValidateObjectAllowDeletedOrNull(const char* info, ObjectType *aObject);
// Returns false if aObject is null or not valid, but considers deleted
// objects valid.
template<class ObjectType>
bool ValidateObjectAllowDeleted(const char* info, ObjectType *aObject);
private:
// Like ValidateObject, but only for cases when aObject is known
// to not be null already.
template<class ObjectType>
bool ValidateObjectAssumeNonNull(const char* info, ObjectType *aObject);
protected:
int32_t MaxTextureSizeForTarget(GLenum target) const {
MOZ_ASSERT(target == LOCAL_GL_TEXTURE_2D ||
(target >= LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
target <= LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z),
"Invalid target enum");
return (target == LOCAL_GL_TEXTURE_2D) ? mGLMaxTextureSize : mGLMaxCubeMapTextureSize;
}
/** like glBufferData but if the call may change the buffer size, checks any GL error generated
* by this glBufferData call and returns it */
GLenum CheckedBufferData(GLenum target,
GLsizeiptr size,
const GLvoid *data,
GLenum usage);
/** like glTexImage2D but if the call may change the texture size, checks any GL error generated
* by this glTexImage2D call and returns it */
GLenum CheckedTexImage2D(GLenum target,
GLint level,
GLenum internalFormat,
GLsizei width,
GLsizei height,
GLint border,
GLenum format,
GLenum type,
const GLvoid *data);
void ForceLoseContext(bool simulateLosing = false);
void ForceRestoreContext();
nsTArray<WebGLRefPtr<WebGLTexture> > mBound2DTextures;
nsTArray<WebGLRefPtr<WebGLTexture> > mBoundCubeMapTextures;
WebGLRefPtr<WebGLProgram> mCurrentProgram;
uint32_t mMaxFramebufferColorAttachments;
WebGLRefPtr<WebGLFramebuffer> mBoundFramebuffer;
WebGLRefPtr<WebGLRenderbuffer> mBoundRenderbuffer;
WebGLRefPtr<WebGLVertexArray> mBoundVertexArray;
LinkedList<WebGLTexture> mTextures;
LinkedList<WebGLBuffer> mBuffers;
LinkedList<WebGLProgram> mPrograms;
LinkedList<WebGLQuery> mQueries;
LinkedList<WebGLShader> mShaders;
LinkedList<WebGLRenderbuffer> mRenderbuffers;
LinkedList<WebGLFramebuffer> mFramebuffers;
LinkedList<WebGLVertexArray> mVertexArrays;
WebGLRefPtr<WebGLVertexArray> mDefaultVertexArray;
// PixelStore parameters
uint32_t mPixelStorePackAlignment, mPixelStoreUnpackAlignment, mPixelStoreColorspaceConversion;
bool mPixelStoreFlipY, mPixelStorePremultiplyAlpha;
WebGLContextFakeBlackStatus mFakeBlackStatus;
class FakeBlackTexture
{
gl::GLContext* mGL;
GLuint mGLName;
public:
FakeBlackTexture(gl::GLContext* gl, GLenum target, GLenum format);
~FakeBlackTexture();
GLuint GLName() const { return mGLName; }
};
UniquePtr<FakeBlackTexture> mBlackOpaqueTexture2D,
mBlackOpaqueTextureCubeMap,
mBlackTransparentTexture2D,
mBlackTransparentTextureCubeMap;
void BindFakeBlackTexturesHelper(
GLenum target,
const nsTArray<WebGLRefPtr<WebGLTexture> >& boundTexturesArray,
UniquePtr<FakeBlackTexture> & opaqueTextureScopedPtr,
UniquePtr<FakeBlackTexture> & transparentTextureScopedPtr);
GLfloat mVertexAttrib0Vector[4];
GLfloat mFakeVertexAttrib0BufferObjectVector[4];
size_t mFakeVertexAttrib0BufferObjectSize;
GLuint mFakeVertexAttrib0BufferObject;
WebGLVertexAttrib0Status mFakeVertexAttrib0BufferStatus;
GLint mStencilRefFront, mStencilRefBack;
GLuint mStencilValueMaskFront, mStencilValueMaskBack,
mStencilWriteMaskFront, mStencilWriteMaskBack;
realGLboolean mColorWriteMask[4];
realGLboolean mDepthWriteMask;
GLfloat mColorClearValue[4];
GLint mStencilClearValue;
GLfloat mDepthClearValue;
GLint mViewportX;
GLint mViewportY;
GLsizei mViewportWidth;
GLsizei mViewportHeight;
bool mAlreadyWarnedAboutViewportLargerThanDest;
nsCOMPtr<nsITimer> mContextRestorer;
bool mAllowContextRestore;
bool mLastLossWasSimulated;
bool mContextLossTimerRunning;
bool mRunContextLossTimerAgain;
ContextStatus mContextStatus;
bool mContextLostErrorSet;
// Used for some hardware (particularly Tegra 2 and 4) that likes to
// be Flushed while doing hundreds of draw calls.
int mDrawCallsSinceLastFlush;
int mAlreadyGeneratedWarnings;
int mMaxWarnings;
bool mAlreadyWarnedAboutFakeVertexAttrib0;
bool ShouldGenerateWarnings() const;
uint64_t mLastUseIndex;
void LoseOldestWebGLContextIfLimitExceeded();
void UpdateLastUseIndex();
template <typename WebGLObjectType>
JS::Value WebGLObjectAsJSValue(JSContext *cx, const WebGLObjectType *, ErrorResult& rv) const;
template <typename WebGLObjectType>
JSObject* WebGLObjectAsJSObject(JSContext *cx, const WebGLObjectType *, ErrorResult& rv) const;
#ifdef XP_MACOSX
// see bug 713305. This RAII helper guarantees that we're on the discrete GPU, during its lifetime
// Debouncing note: we don't want to switch GPUs too frequently, so try to not create and destroy
// these objects at high frequency. Having WebGLContext's hold one such object seems fine,
// because WebGLContext objects only go away during GC, which shouldn't happen too frequently.
// If in the future GC becomes much more frequent, we may have to revisit then (maybe use a timer).
ForceDiscreteGPUHelperCGL mForceDiscreteGPUHelper;
#endif
nsRefPtr<WebGLObserver> mContextObserver;
public:
// console logging helpers
void GenerateWarning(const char *fmt, ...);
void GenerateWarning(const char *fmt, va_list ap);
friend class WebGLTexture;
friend class WebGLFramebuffer;
friend class WebGLRenderbuffer;
friend class WebGLProgram;
friend class WebGLQuery;
friend class WebGLBuffer;
friend class WebGLShader;
friend class WebGLUniformLocation;
friend class WebGLVertexArray;
friend class WebGLVertexArrayFake;
friend class WebGLVertexArrayGL;
};
// used by DOM bindings in conjunction with GetParentObject
inline nsISupports*
ToSupports(WebGLContext* context)
{
return static_cast<nsIDOMWebGLRenderingContext*>(context);
}
/**
** Template implementations
**/
template<class ObjectType>
inline bool
WebGLContext::ValidateObjectAllowDeletedOrNull(const char* info,
ObjectType *aObject)
{
if (aObject && !aObject->IsCompatibleWithContext(this)) {
ErrorInvalidOperation("%s: object from different WebGL context "
"(or older generation of this one) "
"passed as argument", info);
return false;
}
return true;
}
template<class ObjectType>
inline bool
WebGLContext::ValidateObjectAssumeNonNull(const char* info, ObjectType *aObject)
{
MOZ_ASSERT(aObject);
if (!ValidateObjectAllowDeletedOrNull(info, aObject))
return false;
if (aObject->IsDeleted()) {
ErrorInvalidValue("%s: deleted object passed as argument", info);
return false;
}
return true;
}
template<class ObjectType>
inline bool
WebGLContext::ValidateObjectAllowNull(const char* info, ObjectType *aObject)
{
if (!aObject) {
return true;
}
return ValidateObjectAssumeNonNull(info, aObject);
}
template<class ObjectType>
inline bool
WebGLContext::ValidateObjectAllowDeleted(const char* info, ObjectType *aObject)
{
if (!aObject) {
ErrorInvalidValue("%s: null object passed as argument", info);
return false;
}
return ValidateObjectAllowDeletedOrNull(info, aObject);
}
template<class ObjectType>
inline bool
WebGLContext::ValidateObject(const char* info, ObjectType *aObject)
{
if (!aObject) {
ErrorInvalidValue("%s: null object passed as argument", info);
return false;
}
return ValidateObjectAssumeNonNull(info, aObject);
}
// Listen visibilitychange and memory-pressure event for context lose/restore
class WebGLObserver MOZ_FINAL
: public nsIObserver
, public nsIDOMEventListener
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
NS_DECL_NSIDOMEVENTLISTENER
WebGLObserver(WebGLContext* aContext);
void Destroy();
void RegisterVisibilityChangeEvent();
void UnregisterVisibilityChangeEvent();
void RegisterMemoryPressureEvent();
void UnregisterMemoryPressureEvent();
private:
~WebGLObserver();
WebGLContext* mContext;
};
} // namespace mozilla
#endif
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