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gecko-dev/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 <stdarg.h>
#include "GLContextTypes.h"
#include "GLDefs.h"
#include "mozilla/Attributes.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/dom/HTMLCanvasElement.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/EnumeratedArray.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/LinkedList.h"
#include "mozilla/UniquePtr.h"
#include "nsCycleCollectionNoteChild.h"
#include "nsICanvasRenderingContextInternal.h"
#include "nsLayoutUtils.h"
#include "nsTArray.h"
#include "nsWrapperCache.h"
#include "SurfaceTypes.h"
#include "ScopedGLHelpers.h"
#include "TexUnpackBlob.h"
#ifdef XP_MACOSX
#include "ForceDiscreteGPUHelperCGL.h"
#endif
// Local
#include "WebGLContextLossHandler.h"
#include "WebGLContextUnchecked.h"
#include "WebGLFormats.h"
#include "WebGLObjectModel.h"
#include "WebGLStrongTypes.h"
#include "WebGLTexture.h"
// Generated
#include "nsIDOMEventListener.h"
#include "nsIDOMWebGLRenderingContext.h"
#include "nsICanvasRenderingContextInternal.h"
#include "nsIObserver.h"
#include "mozilla/dom/HTMLCanvasElement.h"
#include "nsWrapperCache.h"
#include "nsLayoutUtils.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
/*
* Minimum value constants define in 6.2 State Tables of OpenGL ES - 3.0.4
*/
#define MINVALUE_GL_MAX_3D_TEXTURE_SIZE 256
#define MINVALUE_GL_MAX_ARRAY_TEXTURE_LAYERS 256
/*
* WebGL-only GLenums
*/
#define LOCAL_GL_BROWSER_DEFAULT_WEBGL 0x9244
#define LOCAL_GL_CONTEXT_LOST_WEBGL 0x9242
#define LOCAL_GL_MAX_CLIENT_WAIT_TIMEOUT_WEBGL 0x9247
#define LOCAL_GL_UNPACK_COLORSPACE_CONVERSION_WEBGL 0x9243
#define LOCAL_GL_UNPACK_FLIP_Y_WEBGL 0x9240
#define LOCAL_GL_UNPACK_PREMULTIPLY_ALPHA_WEBGL 0x9241
namespace mozilla {
class ScopedCopyTexImageSource;
class ScopedResolveTexturesForDraw;
class ScopedUnpackReset;
class WebGLActiveInfo;
class WebGLBuffer;
class WebGLExtensionBase;
class WebGLFramebuffer;
class WebGLProgram;
class WebGLQuery;
class WebGLRenderbuffer;
class WebGLSampler;
class WebGLShader;
class WebGLShaderPrecisionFormat;
class WebGLSync;
class WebGLTexture;
class WebGLTimerQuery;
class WebGLTransformFeedback;
class WebGLUniformLocation;
class WebGLVertexArray;
namespace dom {
class Element;
class ImageData;
class OwningHTMLCanvasElementOrOffscreenCanvas;
struct WebGLContextAttributes;
template<typename> struct Nullable;
} // namespace dom
namespace gfx {
class SourceSurface;
class VRLayerChild;
} // namespace gfx
namespace webgl {
struct LinkedProgramInfo;
class ShaderValidator;
class TexUnpackBlob;
struct UniformInfo;
struct UniformBlockInfo;
} // namespace webgl
WebGLTexelFormat GetWebGLTexelFormat(TexInternalFormat format);
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;
bool failIfMajorPerformanceCaveat;
};
// From WebGLContextUtils
TexTarget TexImageTargetToTexTarget(TexImageTarget texImageTarget);
class WebGLIntOrFloat {
enum {
Int,
Float,
Uint
} mType;
union {
GLint i;
GLfloat f;
GLuint u;
} mValue;
public:
explicit WebGLIntOrFloat(GLint i) : mType(Int) { mValue.i = i; }
explicit WebGLIntOrFloat(GLfloat f) : mType(Float) { mValue.f = f; }
GLint AsInt() const { return (mType == Int) ? mValue.i : NS_lroundf(mValue.f); }
GLfloat AsFloat() const { return (mType == Float) ? mValue.f : GLfloat(mValue.i); }
};
struct IndexedBufferBinding
{
WebGLRefPtr<WebGLBuffer> mBufferBinding;
uint64_t mRangeStart;
uint64_t mRangeSize;
IndexedBufferBinding();
uint64_t ByteCount() const;
};
////////////////////////////////////////////////////////////////////////////////
class WebGLContext
: public nsIDOMWebGLRenderingContext
, public nsICanvasRenderingContextInternal
, public nsSupportsWeakReference
, public WebGLContextUnchecked
, public WebGLRectangleObject
, public nsWrapperCache
{
friend class ScopedDrawHelper;
friend class ScopedDrawWithTransformFeedback;
friend class ScopedFBRebinder;
friend class WebGL2Context;
friend class WebGLContextUserData;
friend class WebGLExtensionCompressedTextureATC;
friend class WebGLExtensionCompressedTextureES3;
friend class WebGLExtensionCompressedTextureETC1;
friend class WebGLExtensionCompressedTexturePVRTC;
friend class WebGLExtensionCompressedTextureS3TC;
friend class WebGLExtensionDepthTexture;
friend class WebGLExtensionDisjointTimerQuery;
friend class WebGLExtensionDrawBuffers;
friend class WebGLExtensionLoseContext;
friend class WebGLExtensionVertexArray;
friend class WebGLMemoryTracker;
friend struct webgl::UniformBlockInfo;
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
};
static const uint32_t kMinMaxColorAttachments;
static const uint32_t kMinMaxDrawBuffers;
public:
WebGLContext();
protected:
virtual ~WebGLContext();
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(WebGLContext,
nsIDOMWebGLRenderingContext)
virtual JSObject* WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto) override = 0;
NS_DECL_NSIDOMWEBGLRENDERINGCONTEXT
virtual void OnVisibilityChange() override;
virtual void OnMemoryPressure() override;
// nsICanvasRenderingContextInternal
virtual int32_t GetWidth() const override;
virtual int32_t GetHeight() const override;
NS_IMETHOD SetDimensions(int32_t width, int32_t height) override;
NS_IMETHOD InitializeWithDrawTarget(nsIDocShell*,
NotNull<gfx::DrawTarget*>) override
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHOD Reset() override {
/* (InitializeWithSurface) */
return NS_ERROR_NOT_IMPLEMENTED;
}
virtual UniquePtr<uint8_t[]> GetImageBuffer(int32_t* out_format) override;
NS_IMETHOD GetInputStream(const char* mimeType,
const char16_t* encoderOptions,
nsIInputStream** out_stream) override;
already_AddRefed<mozilla::gfx::SourceSurface>
GetSurfaceSnapshot(bool* out_premultAlpha) override;
NS_IMETHOD SetIsOpaque(bool) override { return NS_OK; };
bool GetIsOpaque() override { return false; }
NS_IMETHOD SetContextOptions(JSContext* cx,
JS::Handle<JS::Value> options,
ErrorResult& aRvForDictionaryInit) override;
NS_IMETHOD SetIsIPC(bool) override {
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* An abstract base class to be implemented by callers wanting to be notified
* that a refresh has occurred. Callers must ensure an observer is removed
* before it is destroyed.
*/
virtual void DidRefresh() override;
NS_IMETHOD Redraw(const gfxRect&) override {
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 ErrorInvalidEnumInfo(const char* info, const char* funcName,
GLenum enumValue);
void ErrorOutOfMemory(const char* fmt = 0, ...);
void ErrorImplementationBug(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.
*/
// Returns nullptr if glenum is unknown.
static const char* EnumName(GLenum glenum);
// Returns hex formatted version of glenum if glenum is unknown.
static void EnumName(GLenum glenum, nsACString* out_name);
void DummyReadFramebufferOperation(const char* funcName);
WebGLTexture* ActiveBoundTextureForTarget(const TexTarget texTarget) const {
switch (texTarget.get()) {
case LOCAL_GL_TEXTURE_2D:
return mBound2DTextures[mActiveTexture];
case LOCAL_GL_TEXTURE_CUBE_MAP:
return mBoundCubeMapTextures[mActiveTexture];
case LOCAL_GL_TEXTURE_3D:
return mBound3DTextures[mActiveTexture];
case LOCAL_GL_TEXTURE_2D_ARRAY:
return mBound2DArrayTextures[mActiveTexture];
default:
MOZ_CRASH("GFX: bad target");
}
}
/* Use this function when you have the texture image target, for example:
* GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP_[POSITIVE|NEGATIVE]_[X|Y|Z], and
* not the actual texture binding target: GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP.
*/
WebGLTexture*
ActiveBoundTextureForTexImageTarget(const TexImageTarget texImgTarget) const
{
const TexTarget texTarget = TexImageTargetToTexTarget(texImgTarget);
return ActiveBoundTextureForTarget(texTarget);
}
void InvalidateResolveCacheForTextureWithTexUnit(const GLuint);
already_AddRefed<Layer>
GetCanvasLayer(nsDisplayListBuilder* builder, Layer* oldLayer,
LayerManager* manager,
bool aMirror = false) override;
// Note that 'clean' here refers to its invalidation state, not the
// contents of the buffer.
void MarkContextClean() override { mInvalidated = false; }
void MarkContextCleanForFrameCapture() override { mCapturedFrameInvalidated = false; }
bool IsContextCleanForFrameCapture() override { return !mCapturedFrameInvalidated; }
gl::GLContext* GL() const { return gl; }
bool IsPremultAlpha() const { return mOptions.premultipliedAlpha; }
bool IsPreservingDrawingBuffer() const { return mOptions.preserveDrawingBuffer; }
bool PresentScreenBuffer();
// Prepare the context for capture before compositing
void BeginComposition();
// Clean up the context after captured for compositing
void EndComposition();
// a number that increments every time we have an event that causes
// all context resources to be lost.
uint32_t Generation() { return mGeneration.value(); }
// 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 bufferBits, bool fakeNoAlpha);
// Calls ForceClearFramebufferWithDefaultValues() for the Context's 'screen'.
void ClearScreen();
void ClearBackbufferIfNeeded();
bool MinCapabilityMode() const { return mMinCapability; }
void RunContextLossTimer();
void UpdateContextLossStatus();
void EnqueueUpdateContextLossStatus();
bool TryToRestoreContext();
void AssertCachedBindings();
void AssertCachedGlobalState();
dom::HTMLCanvasElement* GetCanvas() const { return mCanvasElement; }
// WebIDL WebGLRenderingContext API
void Commit();
void GetCanvas(Nullable<dom::OwningHTMLCanvasElementOrOffscreenCanvas>& retval);
GLsizei DrawingBufferWidth() const { return IsContextLost() ? 0 : mWidth; }
GLsizei DrawingBufferHeight() const {
return IsContextLost() ? 0 : mHeight;
}
layers::LayersBackend GetCompositorBackendType() const;
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& name,
JS::MutableHandle<JSObject*> retval, ErrorResult& rv);
void AttachShader(WebGLProgram* prog, WebGLShader* shader);
void BindAttribLocation(WebGLProgram* prog, GLuint location,
const nsAString& name);
void BindFramebuffer(GLenum target, WebGLFramebuffer* fb);
void BindRenderbuffer(GLenum target, WebGLRenderbuffer* fb);
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 CompileShaderANGLE(WebGLShader* shader);
void CompileShaderBypass(WebGLShader* shader, const nsCString& shaderSource);
already_AddRefed<WebGLFramebuffer> CreateFramebuffer();
already_AddRefed<WebGLProgram> CreateProgram();
already_AddRefed<WebGLRenderbuffer> CreateRenderbuffer();
already_AddRefed<WebGLShader> CreateShader(GLenum type);
already_AddRefed<WebGLVertexArray> CreateVertexArray();
void CullFace(GLenum face);
void DeleteFramebuffer(WebGLFramebuffer* fb);
void DeleteProgram(WebGLProgram* prog);
void DeleteRenderbuffer(WebGLRenderbuffer* rb);
void DeleteShader(WebGLShader* shader);
void DeleteVertexArray(WebGLVertexArray* vao);
void DepthFunc(GLenum func);
void DepthMask(WebGLboolean b);
void DepthRange(GLclampf zNear, GLclampf zFar);
void DetachShader(WebGLProgram* prog, WebGLShader* shader);
void DrawBuffers(const dom::Sequence<GLenum>& buffers);
void Flush();
void Finish();
void FramebufferRenderbuffer(GLenum target, GLenum attachment,
GLenum rbTarget, WebGLRenderbuffer* rb);
void FramebufferTexture2D(GLenum target, GLenum attachment,
GLenum texImageTarget, WebGLTexture* tex,
GLint level);
// Framebuffer validation
bool ValidateFramebufferAttachment(const WebGLFramebuffer* fb, GLenum attachment,
const char* funcName,
bool badColorAttachmentIsInvalidOp = false);
void FrontFace(GLenum mode);
already_AddRefed<WebGLActiveInfo> GetActiveAttrib(WebGLProgram* prog,
GLuint index);
already_AddRefed<WebGLActiveInfo> GetActiveUniform(WebGLProgram* prog,
GLuint index);
void
GetAttachedShaders(WebGLProgram* prog,
dom::Nullable<nsTArray<RefPtr<WebGLShader>>>& retval);
GLint GetAttribLocation(WebGLProgram* prog, const nsAString& name);
JS::Value GetBufferParameter(GLenum target, GLenum pname);
void GetBufferParameter(JSContext*, GLenum target, GLenum pname,
JS::MutableHandle<JS::Value> retval)
{
retval.set(GetBufferParameter(target, pname));
}
GLenum GetError();
virtual 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*, 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*, GLenum target, GLenum pname,
JS::MutableHandle<JS::Value> retval)
{
retval.set(GetRenderbufferParameter(target, pname));
}
JS::Value GetShaderParameter(WebGLShader* shader, GLenum pname);
void GetShaderParameter(JSContext*, 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 GetUniform(JSContext* cx, WebGLProgram* prog,
WebGLUniformLocation* loc);
void GetUniform(JSContext* cx, WebGLProgram* prog,
WebGLUniformLocation* loc,
JS::MutableHandle<JS::Value> retval)
{
retval.set(GetUniform(cx, prog, loc));
}
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 IsVertexArray(WebGLVertexArray* vao);
void LineWidth(GLfloat width);
void LinkProgram(WebGLProgram* prog);
void PixelStorei(GLenum pname, GLint param);
void PolygonOffset(GLfloat factor, GLfloat units);
already_AddRefed<layers::SharedSurfaceTextureClient> GetVRFrame();
bool StartVRPresentation();
protected:
bool ReadPixels_SharedPrecheck(ErrorResult* const out_error);
void ReadPixelsImpl(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
GLenum type, void* data, uint32_t dataLen);
bool DoReadPixelsAndConvert(const webgl::FormatInfo* srcFormat, GLint x, GLint y,
GLsizei width, GLsizei height, GLenum format,
GLenum destType, void* dest, uint32_t dataLen,
uint32_t rowStride);
public:
void ReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
GLenum type, const dom::Nullable<dom::ArrayBufferView>& maybeView,
ErrorResult& rv)
{
const char funcName[] = "readPixels";
if (maybeView.IsNull()) {
ErrorInvalidValue("%s: `pixels` must not be null.", funcName);
return;
}
ReadPixels(x, y, width, height, format, type, maybeView.Value(), rv);
}
void ReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
GLenum type, const dom::ArrayBufferView& pixels, ErrorResult& rv);
void RenderbufferStorage(GLenum target, GLenum internalFormat,
GLsizei width, GLsizei height);
protected:
void RenderbufferStorage_base(const char* funcName, GLenum target,
GLsizei samples, GLenum internalformat,
GLsizei width, GLsizei height);
public:
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 Uniform1i(WebGLUniformLocation* loc, GLint x);
void Uniform2i(WebGLUniformLocation* loc, GLint x, GLint y);
void Uniform3i(WebGLUniformLocation* loc, GLint x, GLint y, GLint z);
void Uniform4i(WebGLUniformLocation* loc, GLint x, GLint y, GLint z, GLint w);
void Uniform1f(WebGLUniformLocation* loc, GLfloat x);
void Uniform2f(WebGLUniformLocation* loc, GLfloat x, GLfloat y);
void Uniform3f(WebGLUniformLocation* loc, GLfloat x, GLfloat y, GLfloat z);
void Uniform4f(WebGLUniformLocation* loc, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
//////////////////////////
protected:
template<typename elemT, typename arrT>
struct Arr {
size_t dataCount;
const elemT* data;
explicit Arr(const arrT& arr) {
arr.ComputeLengthAndData();
dataCount = arr.LengthAllowShared();
data = arr.DataAllowShared();
}
explicit Arr(const dom::Sequence<elemT>& arr) {
dataCount = arr.Length();
data = arr.Elements();
}
};
typedef Arr<GLint, dom::Int32Array> IntArr;
typedef Arr<GLfloat, dom::Float32Array> FloatArr;
////////////////
void UniformNiv(const char* funcName, uint8_t N, WebGLUniformLocation* loc,
const IntArr& arr);
void UniformNfv(const char* funcName, uint8_t N, WebGLUniformLocation* loc,
const FloatArr& arr);
void UniformMatrixAxBfv(const char* funcName, uint8_t A, uint8_t B,
WebGLUniformLocation* loc, bool transpose,
const FloatArr& arr);
////////////////
public:
template<typename T>
void Uniform1iv(WebGLUniformLocation* loc, const T& arr) {
UniformNiv("uniform1iv", 1, loc, IntArr(arr));
}
template<typename T>
void Uniform2iv(WebGLUniformLocation* loc, const T& arr) {
UniformNiv("uniform2iv", 2, loc, IntArr(arr));
}
template<typename T>
void Uniform3iv(WebGLUniformLocation* loc, const T& arr) {
UniformNiv("uniform3iv", 3, loc, IntArr(arr));
}
template<typename T>
void Uniform4iv(WebGLUniformLocation* loc, const T& arr) {
UniformNiv("uniform4iv", 4, loc, IntArr(arr));
}
//////
template<typename T>
void Uniform1fv(WebGLUniformLocation* loc, const T& arr) {
UniformNfv("uniform1fv", 1, loc, FloatArr(arr));
}
template<typename T>
void Uniform2fv(WebGLUniformLocation* loc, const T& arr) {
UniformNfv("uniform2fv", 2, loc, FloatArr(arr));
}
template<typename T>
void Uniform3fv(WebGLUniformLocation* loc, const T& arr) {
UniformNfv("uniform3fv", 3, loc, FloatArr(arr));
}
template<typename T>
void Uniform4fv(WebGLUniformLocation* loc, const T& arr) {
UniformNfv("uniform4fv", 4, loc, FloatArr(arr));
}
//////
template<typename T>
void UniformMatrix2fv(WebGLUniformLocation* loc, bool transpose, const T& arr) {
UniformMatrixAxBfv("uniformMatrix2fv", 2, 2, loc, transpose, FloatArr(arr));
}
template<typename T>
void UniformMatrix3fv(WebGLUniformLocation* loc, bool transpose, const T& arr) {
UniformMatrixAxBfv("uniformMatrix3fv", 3, 3, loc, transpose, FloatArr(arr));
}
template<typename T>
void UniformMatrix4fv(WebGLUniformLocation* loc, bool transpose, const T& arr) {
UniformMatrixAxBfv("uniformMatrix4fv", 4, 4, loc, transpose, FloatArr(arr));
}
////////////////////////////////////
void UseProgram(WebGLProgram* prog);
bool ValidateAttribArraySetter(const char* name, uint32_t count,
uint32_t arrayLength);
bool ValidateUniformLocation(WebGLUniformLocation* loc, const char* funcName);
bool ValidateUniformSetter(WebGLUniformLocation* loc, uint8_t setterSize,
GLenum setterType, const char* funcName);
bool ValidateUniformArraySetter(WebGLUniformLocation* loc,
uint8_t setterElemSize, GLenum setterType,
uint32_t setterArraySize, const char* funcName,
uint32_t* out_numElementsToUpload);
bool ValidateUniformMatrixArraySetter(WebGLUniformLocation* loc,
uint8_t setterCols,
uint8_t setterRows,
GLenum setterType,
uint32_t setterArraySize,
bool setterTranspose,
const char* funcName,
uint32_t* out_numElementsToUpload);
void ValidateProgram(WebGLProgram* prog);
bool ValidateUniformLocation(const char* info, WebGLUniformLocation* loc);
bool ValidateSamplerUniformSetter(const char* info,
WebGLUniformLocation* loc, GLint value);
void Viewport(GLint x, GLint y, GLsizei width, GLsizei height);
// -----------------------------------------------------------------------------
// WEBGL_lose_context
public:
void LoseContext();
void RestoreContext();
// -----------------------------------------------------------------------------
// Buffer Objects (WebGLContextBuffers.cpp)
void BindBuffer(GLenum target, WebGLBuffer* buffer);
void BindBufferBase(GLenum target, GLuint index, WebGLBuffer* buf);
void BindBufferRange(GLenum target, GLuint index, WebGLBuffer* buf,
WebGLintptr offset, WebGLsizeiptr size);
private:
template<typename BufferT>
void BufferDataT(GLenum target, const BufferT& data, GLenum usage);
public:
void BufferData(GLenum target, WebGLsizeiptr size, GLenum usage);
void BufferData(GLenum target, const dom::ArrayBufferView& data,
GLenum usage);
void BufferData(GLenum target, const dom::Nullable<dom::ArrayBuffer>& maybeData,
GLenum usage);
void BufferData(GLenum target, const dom::SharedArrayBuffer& data,
GLenum usage);
private:
template<typename BufferT>
void BufferSubDataT(GLenum target, WebGLsizeiptr byteOffset,
const BufferT& data);
public:
void BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
const dom::ArrayBufferView& data);
void BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
const dom::Nullable<dom::ArrayBuffer>& maybeData);
void BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
const dom::SharedArrayBuffer& data);
already_AddRefed<WebGLBuffer> CreateBuffer();
void DeleteBuffer(WebGLBuffer* buf);
bool IsBuffer(WebGLBuffer* buf);
protected:
// bound buffer state
WebGLRefPtr<WebGLBuffer> mBoundArrayBuffer;
WebGLRefPtr<WebGLBuffer> mBoundCopyReadBuffer;
WebGLRefPtr<WebGLBuffer> mBoundCopyWriteBuffer;
WebGLRefPtr<WebGLBuffer> mBoundPixelPackBuffer;
WebGLRefPtr<WebGLBuffer> mBoundPixelUnpackBuffer;
WebGLRefPtr<WebGLBuffer> mBoundUniformBuffer;
std::vector<IndexedBufferBinding> mIndexedUniformBufferBindings;
WebGLRefPtr<WebGLBuffer>& GetBufferSlotByTarget(GLenum target);
WebGLRefPtr<WebGLBuffer>& GetBufferSlotByTargetIndexed(GLenum target,
GLuint index);
// -----------------------------------------------------------------------------
// Queries (WebGL2ContextQueries.cpp)
protected:
WebGLRefPtr<WebGLQuery>& GetQuerySlotByTarget(GLenum target);
WebGLRefPtr<WebGLQuery> mActiveOcclusionQuery;
WebGLRefPtr<WebGLQuery> mActiveTransformFeedbackQuery;
// -----------------------------------------------------------------------------
// State and State Requests (WebGLContextState.cpp)
public:
void Disable(GLenum cap);
void Enable(GLenum cap);
bool GetStencilBits(GLint* const out_stencilBits);
bool GetChannelBits(const char* funcName, GLenum pname, GLint* const out_val);
virtual 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;
realGLboolean mDepthTestEnabled;
realGLboolean mStencilTestEnabled;
bool ValidateCapabilityEnum(GLenum cap, const char* info);
realGLboolean* GetStateTrackingSlot(GLenum cap);
// -----------------------------------------------------------------------------
// Texture funcions (WebGLContextTextures.cpp)
public:
void ActiveTexture(GLenum texUnit);
void BindTexture(GLenum texTarget, WebGLTexture* tex);
already_AddRefed<WebGLTexture> CreateTexture();
void DeleteTexture(WebGLTexture* tex);
void GenerateMipmap(GLenum texTarget);
void GetTexParameter(JSContext*, GLenum texTarget, GLenum pname,
JS::MutableHandle<JS::Value> retval)
{
retval.set(GetTexParameter(texTarget, pname));
}
bool IsTexture(WebGLTexture* tex);
void TexParameterf(GLenum texTarget, GLenum pname, GLfloat param) {
TexParameter_base(texTarget, pname, nullptr, &param);
}
void TexParameteri(GLenum texTarget, GLenum pname, GLint param) {
TexParameter_base(texTarget, pname, &param, nullptr);
}
protected:
JS::Value GetTexParameter(GLenum texTarget, GLenum pname);
void TexParameter_base(GLenum texTarget, GLenum pname, GLint* maybeIntParam,
GLfloat* maybeFloatParam);
virtual bool IsTexParamValid(GLenum pname) const;
// Upload funcs
public:
void CompressedTexImage2D(GLenum texImageTarget, GLint level, GLenum internalFormat,
GLsizei width, GLsizei height, GLint border,
const dom::ArrayBufferView& view);
void CompressedTexSubImage2D(GLenum texImageTarget, GLint level, GLint xOffset,
GLint yOffset, GLsizei width, GLsizei height,
GLenum unpackFormat, const dom::ArrayBufferView& view);
void CopyTexImage2D(GLenum texImageTarget, GLint level, GLenum internalFormat,
GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
void CopyTexSubImage2D(GLenum texImageTarget, GLint level, GLint xOffset,
GLint yOffset, GLint x, GLint y, GLsizei width,
GLsizei height);
////
void TexImage2D(GLenum texImageTarget, GLint level, GLenum internalFormat,
GLsizei width, GLsizei height, GLint border, GLenum unpackFormat,
GLenum unpackType,
const dom::Nullable<dom::ArrayBufferView>& maybeView,
ErrorResult&);
protected:
void TexImage2D(GLenum texImageTarget, GLint level, GLenum internalFormat,
GLenum unpackFormat, GLenum unpackType,
const dom::ImageData& imageData, ErrorResult& out_error);
public:
void TexImage2D(GLenum texImageTarget, GLint level, GLenum internalFormat,
GLenum unpackFormat, GLenum unpackType, const dom::Element& elem,
ErrorResult& out_error);
////
protected:
void TexSubImage2D(GLenum texImageTarget, GLint level, GLint xOffset, GLint yOffset,
GLsizei width, GLsizei height, GLenum unpackFormat,
GLenum unpackType, const dom::ArrayBufferView& view);
void TexSubImage2D(GLenum texImageTarget, GLint level, GLint xOffset, GLint yOffset,
GLenum unpackFormat, GLenum unpackType,
const dom::ImageData& imageData, ErrorResult& out_error);
public:
void TexSubImage2D(GLenum texImageTarget, GLint level, GLint xOffset, GLint yOffset,
GLenum unpackFormat, GLenum unpackType, const dom::Element& elem,
ErrorResult& out_error);
////////////////
// Pseudo-nullable WebGL1 entrypoints
void TexImage2D(GLenum texImageTarget, GLint level, GLenum internalFormat,
GLenum unpackFormat, GLenum unpackType,
const dom::ImageData* imageData, ErrorResult& out_error)
{
const char funcName[] = "texImage2D";
if (!imageData) {
ErrorInvalidValue("%s: `data` must not be null.", funcName);
return;
}
TexImage2D(texImageTarget, level, internalFormat, unpackFormat, unpackType,
*imageData, out_error);
}
void TexSubImage2D(GLenum texImageTarget, GLint level, GLint xOffset, GLint yOffset,
GLsizei width, GLsizei height, GLenum unpackFormat,
GLenum unpackType,
const dom::Nullable<dom::ArrayBufferView>& maybeView, ErrorResult&)
{
const char funcName[] = "texSubImage2D";
if (maybeView.IsNull()) {
ErrorInvalidValue("%s: `data` must not be null.", funcName);
return;
}
TexSubImage2D(texImageTarget, level, xOffset, yOffset, width, height,
unpackFormat, unpackType, maybeView.Value());
}
void TexSubImage2D(GLenum texImageTarget, GLint level, GLint xOffset, GLint yOffset,
GLenum unpackFormat, GLenum unpackType,
const dom::ImageData* imageData, ErrorResult& out_error)
{
const char funcName[] = "texSubImage2D";
if (!imageData) {
ErrorInvalidValue("%s: `data` must not be null.", funcName);
return;
}
TexSubImage2D(texImageTarget, level, xOffset, yOffset, unpackFormat, unpackType,
*imageData, out_error);
}
//////
// WebGLTextureUpload.cpp
public:
bool ValidateUnpackPixels(const char* funcName, uint32_t fullRows,
uint32_t tailPixels, webgl::TexUnpackBlob* blob);
protected:
bool ValidateTexImageSpecification(const char* funcName, uint8_t funcDims,
GLenum texImageTarget, GLint level,
GLsizei width, GLsizei height, GLsizei depth,
GLint border,
TexImageTarget* const out_target,
WebGLTexture** const out_texture,
WebGLTexture::ImageInfo** const out_imageInfo);
bool ValidateTexImageSelection(const char* funcName, uint8_t funcDims,
GLenum texImageTarget, GLint level, GLint xOffset,
GLint yOffset, GLint zOffset, GLsizei width,
GLsizei height, GLsizei depth,
TexImageTarget* const out_target,
WebGLTexture** const out_texture,
WebGLTexture::ImageInfo** const out_imageInfo);
bool ValidateUnpackInfo(const char* funcName, bool usePBOs, GLenum format,
GLenum type, webgl::PackingInfo* const out);
// -----------------------------------------------------------------------------
// Vertices Feature (WebGLContextVertices.cpp)
GLenum mPrimRestartTypeBytes;
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.LengthAllowShared(), arr.DataAllowShared());
}
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.LengthAllowShared(), arr.DataAllowShared());
}
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.LengthAllowShared(), arr.DataAllowShared());
}
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.LengthAllowShared(), arr.DataAllowShared());
}
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;
bool mBufferFetch_IsAttrib0Active;
bool DrawArrays_check(const char* funcName, GLenum mode, GLint first,
GLsizei vertCount, GLsizei instanceCount);
bool DrawElements_check(const char* funcName, GLenum mode, GLsizei vertCount,
GLenum type, WebGLintptr byteOffset,
GLsizei instanceCount);
bool DrawInstanced_check(const char* info);
void Draw_cleanup(const char* funcName);
void VertexAttrib1fv_base(GLuint index, uint32_t arrayLength,
const GLfloat* ptr);
void VertexAttrib2fv_base(GLuint index, uint32_t arrayLength,
const GLfloat* ptr);
void VertexAttrib3fv_base(GLuint index, uint32_t arrayLength,
const GLfloat* ptr);
void VertexAttrib4fv_base(GLuint index, uint32_t arrayLength,
const GLfloat* ptr);
bool ValidateBufferFetching(const char* info);
bool BindArrayAttribToLocation0(WebGLProgram* prog);
// -----------------------------------------------------------------------------
// PROTECTED
protected:
WebGLVertexAttrib0Status WhatDoesVertexAttrib0Need();
bool DoFakeVertexAttrib0(GLuint vertexCount);
void UndoFakeVertexAttrib0();
inline void InvalidateBufferFetching()
{
mBufferFetchingIsVerified = false;
mBufferFetchingHasPerVertex = false;
mMaxFetchedVertices = 0;
mMaxFetchedInstances = 0;
}
CheckedUint32 mGeneration;
WebGLContextOptions mOptions;
bool mInvalidated;
bool mCapturedFrameInvalidated;
bool mResetLayer;
bool mLayerIsMirror;
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;
GLenum mDefaultFB_DrawBuffer0;
// glGetError sources:
bool mEmitContextLostErrorOnce;
GLenum mWebGLError;
GLenum mUnderlyingGLError;
GLenum GetAndFlushUnderlyingGLErrors();
bool mBypassShaderValidation;
webgl::ShaderValidator* CreateShaderValidator(GLenum shaderType) const;
// some GL constants
int32_t mGLMaxVertexAttribs;
int32_t mGLMaxTextureUnits;
int32_t mGLMaxTextureImageUnits;
int32_t mGLMaxVertexTextureImageUnits;
int32_t mGLMaxVaryingVectors;
int32_t mGLMaxFragmentUniformVectors;
int32_t mGLMaxVertexUniformVectors;
uint32_t mGLMaxTransformFeedbackSeparateAttribs;
GLuint mGLMaxUniformBufferBindings;
// What is supported:
uint32_t mGLMaxColorAttachments;
uint32_t mGLMaxDrawBuffers;
// What we're allowing:
uint32_t mImplMaxColorAttachments;
uint32_t mImplMaxDrawBuffers;
public:
GLenum LastColorAttachmentEnum() const {
return LOCAL_GL_COLOR_ATTACHMENT0 + mImplMaxColorAttachments - 1;
}
const decltype(mOptions)& Options() const { return mOptions; }
protected:
// Texture sizes are often not actually the GL values. Let's be explicit that these
// are implementation limits.
uint32_t mImplMaxTextureSize;
uint32_t mImplMaxCubeMapTextureSize;
uint32_t mImplMax3DTextureSize;
uint32_t mImplMaxArrayTextureLayers;
uint32_t mImplMaxRenderbufferSize;
public:
GLuint MaxVertexAttribs() const {
return mGLMaxVertexAttribs;
}
GLuint GLMaxTextureUnits() const {
return mGLMaxTextureUnits;
}
bool IsFormatValidForFB(TexInternalFormat format) const;
protected:
// 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,
RefPtr<WebGLExtensionBase>> ExtensionsArrayType;
ExtensionsArrayType mExtensions;
// enable an extension. the extension should not be enabled before.
void EnableExtension(WebGLExtensionID ext);
// Enable an extension if it's supported. Return the extension on success.
WebGLExtensionBase* EnableSupportedExtension(JSContext* js,
WebGLExtensionID ext);
public:
// returns true if the extension has been enabled by calling getExtension.
bool IsExtensionEnabled(WebGLExtensionID ext) const;
protected:
// 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)
public:
virtual bool IsWebGL2() const = 0;
struct FailureReason {
nsCString key; // For reporting.
nsCString info;
FailureReason() { }
template<typename A, typename B>
FailureReason(const A& _key, const B& _info)
: key(nsCString(_key))
, info(nsCString(_info))
{ }
};
protected:
bool InitWebGL2(FailureReason* const out_failReason);
bool CreateAndInitGL(bool forceEnabled,
std::vector<FailureReason>* const out_failReasons);
bool ResizeBackbuffer(uint32_t width, uint32_t height);
typedef already_AddRefed<gl::GLContext> FnCreateGL_T(const gl::SurfaceCaps& caps,
gl::CreateContextFlags flags,
WebGLContext* webgl,
std::vector<FailureReason>* const out_failReasons);
bool CreateAndInitGLWith(FnCreateGL_T fnCreateGL, const gl::SurfaceCaps& baseCaps,
gl::CreateContextFlags flags,
std::vector<FailureReason>* const out_failReasons);
void ThrowEvent_WebGLContextCreationError(const nsACString& text);
// -------------------------------------------------------------------------
// Validation functions (implemented in WebGLContextValidate.cpp)
bool InitAndValidateGL(FailureReason* const out_failReason);
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 ValidateDataRanges(WebGLintptr readOffset, WebGLintptr writeOffset, WebGLsizeiptr size, 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, js::Scalar::Type jsArrayType,
WebGLTexImageFunc func, WebGLTexDimensions dims);
bool ValidateDrawModeEnum(GLenum mode, const char* info);
bool ValidateAttribIndex(GLuint index, const char* info);
bool ValidateAttribPointer(bool integerMode, GLuint index, GLint size, GLenum type,
WebGLboolean normalized, GLsizei stride,
WebGLintptr byteOffset, const char* info);
bool ValidateStencilParamsForDrawCall();
bool ValidateCopyTexImage(TexInternalFormat srcFormat, TexInternalFormat dstformat,
WebGLTexImageFunc func, WebGLTexDimensions dims);
bool ValidateSamplerParameterName(GLenum pname, const char* info);
bool ValidateSamplerParameterParams(GLenum pname, const WebGLIntOrFloat& param, const char* info);
bool ValidateTexImage(TexImageTarget texImageTarget,
GLint level, GLenum internalFormat,
GLint xoffset, GLint yoffset, GLint zoffset,
GLint width, GLint height, GLint depth,
GLint border, GLenum format, GLenum type,
WebGLTexImageFunc func, WebGLTexDimensions dims);
bool ValidateTexImageFormat(GLenum internalFormat, WebGLTexImageFunc func,
WebGLTexDimensions dims);
bool ValidateTexImageType(GLenum type, WebGLTexImageFunc func,
WebGLTexDimensions dims);
bool ValidateTexImageFormatAndType(GLenum format, GLenum type,
WebGLTexImageFunc func,
WebGLTexDimensions dims);
bool ValidateCompTexImageInternalFormat(GLenum format,
WebGLTexImageFunc func,
WebGLTexDimensions dims);
bool ValidateCopyTexImageInternalFormat(GLenum format,
WebGLTexImageFunc func,
WebGLTexDimensions dims);
bool ValidateTexImageSize(TexImageTarget texImageTarget, GLint level,
GLint width, GLint height, GLint depth,
WebGLTexImageFunc func, WebGLTexDimensions dims);
bool ValidateTexSubImageSize(GLint x, GLint y, GLint z, GLsizei width,
GLsizei height, GLsizei depth,
GLsizei baseWidth, GLsizei baseHeight,
GLsizei baseDepth, WebGLTexImageFunc func,
WebGLTexDimensions dims);
bool ValidateCompTexImageSize(GLint level, GLenum internalFormat,
GLint xoffset, GLint yoffset, GLsizei width,
GLsizei height, GLsizei levelWidth,
GLsizei levelHeight, WebGLTexImageFunc func,
WebGLTexDimensions dims);
bool ValidateCompTexImageDataSize(GLint level, GLenum internalFormat,
GLsizei width, GLsizei height,
uint32_t byteLength,
WebGLTexImageFunc func,
WebGLTexDimensions dims);
bool ValidateUniformLocationForProgram(WebGLUniformLocation* location,
WebGLProgram* program,
const char* funcName);
bool ValidateCurFBForRead(const char* funcName,
const webgl::FormatUsageInfo** const out_format,
uint32_t* const out_width, uint32_t* const out_height);
bool HasDrawBuffers() const {
return IsWebGL2() ||
IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers);
}
WebGLRefPtr<WebGLBuffer>* ValidateBufferSlot(const char* funcName, GLenum target);
WebGLBuffer* ValidateBufferSelection(const char* funcName, GLenum target);
IndexedBufferBinding* ValidateIndexedBufferSlot(const char* funcName, GLenum target,
GLuint index);
bool ValidateIndexedBufferBinding(const char* funcName, GLenum target, GLuint index,
WebGLRefPtr<WebGLBuffer>** const out_genericBinding,
IndexedBufferBinding** const out_indexedBinding);
bool ValidateNonNegative(const char* funcName, const char* argName, int64_t val) {
if (MOZ_UNLIKELY(val < 0)) {
ErrorInvalidValue("%s: `%s` must be non-negative.", funcName, argName);
return false;
}
return true;
}
void Invalidate();
void DestroyResourcesAndContext();
void MakeContextCurrent() const;
// helpers
bool 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);
//////
// Returns false if `object` is null or not valid.
template<class ObjectType>
bool ValidateObject(const char* info, ObjectType* object);
// Returns false if `object` is not valid. Considers null to be valid.
template<class ObjectType>
bool ValidateObjectAllowNull(const char* info, ObjectType* object);
// Returns false if `object` is not valid, but considers deleted objects and
// null objects valid.
template<class ObjectType>
bool ValidateObjectAllowDeletedOrNull(const char* info, ObjectType* object);
// Returns false if `object` is null or not valid, but considers deleted
// objects valid.
template<class ObjectType>
bool ValidateObjectAllowDeleted(const char* info, ObjectType* object);
private:
// Like ValidateObject, but only for cases when `object` is known to not be
// null already.
template<class ObjectType>
bool ValidateObjectAssumeNonNull(const char* info, ObjectType* object);
private:
// -------------------------------------------------------------------------
// Context customization points
virtual WebGLVertexArray* CreateVertexArrayImpl();
virtual bool ValidateAttribPointerType(bool integerMode, GLenum type, uint32_t* alignment, const char* info) = 0;
virtual bool ValidateQueryTarget(GLenum usage, const char* info) = 0;
virtual bool ValidateUniformMatrixTranspose(bool transpose, const char* info) = 0;
public:
void ForceLoseContext(bool simulateLoss = false);
protected:
void ForceRestoreContext();
nsTArray<WebGLRefPtr<WebGLTexture> > mBound2DTextures;
nsTArray<WebGLRefPtr<WebGLTexture> > mBoundCubeMapTextures;
nsTArray<WebGLRefPtr<WebGLTexture> > mBound3DTextures;
nsTArray<WebGLRefPtr<WebGLTexture> > mBound2DArrayTextures;
nsTArray<WebGLRefPtr<WebGLSampler> > mBoundSamplers;
void ResolveTexturesForDraw() const;
WebGLRefPtr<WebGLProgram> mCurrentProgram;
RefPtr<const webgl::LinkedProgramInfo> mActiveProgramLinkInfo;
bool ValidateFramebufferTarget(GLenum target, const char* const info);
WebGLRefPtr<WebGLFramebuffer> mBoundDrawFramebuffer;
WebGLRefPtr<WebGLFramebuffer> mBoundReadFramebuffer;
WebGLRefPtr<WebGLRenderbuffer> mBoundRenderbuffer;
WebGLRefPtr<WebGLTransformFeedback> mBoundTransformFeedback;
WebGLRefPtr<WebGLVertexArray> mBoundVertexArray;
LinkedList<WebGLBuffer> mBuffers;
LinkedList<WebGLFramebuffer> mFramebuffers;
LinkedList<WebGLProgram> mPrograms;
LinkedList<WebGLQuery> mQueries;
LinkedList<WebGLRenderbuffer> mRenderbuffers;
LinkedList<WebGLSampler> mSamplers;
LinkedList<WebGLShader> mShaders;
LinkedList<WebGLSync> mSyncs;
LinkedList<WebGLTexture> mTextures;
LinkedList<WebGLTimerQuery> mTimerQueries;
LinkedList<WebGLTransformFeedback> mTransformFeedbacks;
LinkedList<WebGLVertexArray> mVertexArrays;
WebGLRefPtr<WebGLTransformFeedback> mDefaultTransformFeedback;
WebGLRefPtr<WebGLVertexArray> mDefaultVertexArray;
// PixelStore parameters
uint32_t mPixelStore_UnpackImageHeight;
uint32_t mPixelStore_UnpackSkipImages;
uint32_t mPixelStore_UnpackRowLength;
uint32_t mPixelStore_UnpackSkipRows;
uint32_t mPixelStore_UnpackSkipPixels;
uint32_t mPixelStore_UnpackAlignment;
uint32_t mPixelStore_PackRowLength;
uint32_t mPixelStore_PackSkipRows;
uint32_t mPixelStore_PackSkipPixels;
uint32_t mPixelStore_PackAlignment;
CheckedUint32 GetUnpackSize(bool isFunc3D, uint32_t width, uint32_t height,
uint32_t depth, uint8_t bytesPerPixel);
bool ValidatePackSize(const char* funcName, uint32_t width, uint32_t height,
uint8_t bytesPerPixel, uint32_t* const out_rowStride,
uint32_t* const out_endOffset);
GLenum mPixelStore_ColorspaceConversion;
bool mPixelStore_FlipY;
bool mPixelStore_PremultiplyAlpha;
////////////////////////////////////
class FakeBlackTexture {
public:
static UniquePtr<FakeBlackTexture> Create(gl::GLContext* gl,
TexTarget target,
FakeBlackType type);
gl::GLContext* const mGL;
const GLuint mGLName;
~FakeBlackTexture();
protected:
explicit FakeBlackTexture(gl::GLContext* gl);
};
UniquePtr<FakeBlackTexture> mFakeBlack_2D_0000;
UniquePtr<FakeBlackTexture> mFakeBlack_2D_0001;
UniquePtr<FakeBlackTexture> mFakeBlack_CubeMap_0000;
UniquePtr<FakeBlackTexture> mFakeBlack_CubeMap_0001;
UniquePtr<FakeBlackTexture> mFakeBlack_3D_0000;
UniquePtr<FakeBlackTexture> mFakeBlack_3D_0001;
UniquePtr<FakeBlackTexture> mFakeBlack_2D_Array_0000;
UniquePtr<FakeBlackTexture> mFakeBlack_2D_Array_0001;
bool BindFakeBlack(uint32_t texUnit, TexTarget target, FakeBlackType fakeBlack);
////////////////////////////////////
// Generic Vertex Attributes
UniquePtr<GLenum[]> mVertexAttribType;
GLfloat mVertexAttrib0Vector[4];
GLfloat mFakeVertexAttrib0BufferObjectVector[4];
size_t mFakeVertexAttrib0BufferObjectSize;
GLuint mFakeVertexAttrib0BufferObject;
WebGLVertexAttrib0Status mFakeVertexAttrib0BufferStatus;
void GetVertexAttribFloat(GLuint index, GLfloat* out_result);
void GetVertexAttribInt(GLuint index, GLint* out_result);
void GetVertexAttribUint(GLuint index, GLuint* out_result);
JSObject* GetVertexAttribFloat32Array(JSContext* cx, GLuint index);
JSObject* GetVertexAttribInt32Array(JSContext* cx, GLuint index);
JSObject* GetVertexAttribUint32Array(JSContext* cx, GLuint index);
GLint mStencilRefFront;
GLint mStencilRefBack;
GLuint mStencilValueMaskFront;
GLuint mStencilValueMaskBack;
GLuint mStencilWriteMaskFront;
GLuint mStencilWriteMaskBack;
realGLboolean mColorWriteMask[4];
realGLboolean mDepthWriteMask;
GLfloat mColorClearValue[4];
GLint mStencilClearValue;
GLfloat mDepthClearValue;
GLint mViewportX;
GLint mViewportY;
GLsizei mViewportWidth;
GLsizei mViewportHeight;
bool mAlreadyWarnedAboutViewportLargerThanDest;
WebGLContextLossHandler mContextLossHandler;
bool mAllowContextRestore;
bool mLastLossWasSimulated;
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;
bool mNeedsFakeNoAlpha;
bool mNeedsFakeNoDepth;
bool mNeedsFakeNoStencil;
bool mNeedsEmulatedLoneDepthStencil;
bool HasTimestampBits() const;
struct ScopedMaskWorkaround {
WebGLContext& mWebGL;
const bool mFakeNoAlpha;
const bool mFakeNoDepth;
const bool mFakeNoStencil;
static bool ShouldFakeNoAlpha(WebGLContext& webgl) {
// We should only be doing this if we're about to draw to the backbuffer, but
// the backbuffer needs to have this fake-no-alpha workaround.
return !webgl.mBoundDrawFramebuffer &&
webgl.mNeedsFakeNoAlpha &&
webgl.mColorWriteMask[3] != false;
}
static bool ShouldFakeNoDepth(WebGLContext& webgl) {
// We should only be doing this if we're about to draw to the backbuffer.
return !webgl.mBoundDrawFramebuffer &&
webgl.mNeedsFakeNoDepth &&
webgl.mDepthTestEnabled;
}
static bool HasDepthButNoStencil(const WebGLFramebuffer* fb);
static bool ShouldFakeNoStencil(WebGLContext& webgl) {
if (!webgl.mStencilTestEnabled)
return false;
if (!webgl.mBoundDrawFramebuffer) {
if (webgl.mNeedsFakeNoStencil)
return true;
if (webgl.mNeedsEmulatedLoneDepthStencil &&
webgl.mOptions.depth && !webgl.mOptions.stencil)
{
return true;
}
return false;
}
if (webgl.mNeedsEmulatedLoneDepthStencil &&
HasDepthButNoStencil(webgl.mBoundDrawFramebuffer))
{
return true;
}
return false;
}
explicit ScopedMaskWorkaround(WebGLContext& webgl);
~ScopedMaskWorkaround();
};
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
public:
// console logging helpers
void GenerateWarning(const char* fmt, ...);
void GenerateWarning(const char* fmt, va_list ap);
public:
UniquePtr<webgl::FormatUsageAuthority> mFormatUsage;
virtual UniquePtr<webgl::FormatUsageAuthority>
CreateFormatUsage(gl::GLContext* gl) const = 0;
const decltype(mBound2DTextures)* TexListForElemType(GLenum elemType) const;
// Friend list
friend class ScopedCopyTexImageSource;
friend class ScopedResolveTexturesForDraw;
friend class ScopedUnpackReset;
friend class webgl::TexUnpackBlob;
friend class webgl::TexUnpackBytes;
friend class webgl::TexUnpackImage;
friend class webgl::TexUnpackSurface;
friend struct webgl::UniformInfo;
friend class WebGLTexture;
friend class WebGLFBAttachPoint;
friend class WebGLFramebuffer;
friend class WebGLRenderbuffer;
friend class WebGLProgram;
friend class WebGLQuery;
friend class WebGLBuffer;
friend class WebGLSampler;
friend class WebGLShader;
friend class WebGLSync;
friend class WebGLTimerQuery;
friend class WebGLTransformFeedback;
friend class WebGLUniformLocation;
friend class WebGLVertexArray;
friend class WebGLVertexArrayFake;
friend class WebGLVertexArrayGL;
};
// used by DOM bindings in conjunction with GetParentObject
inline nsISupports*
ToSupports(WebGLContext* webgl)
{
return static_cast<nsIDOMWebGLRenderingContext*>(webgl);
}
/**
** Template implementations
**/
template<class ObjectType>
inline bool
WebGLContext::ValidateObjectAllowDeletedOrNull(const char* info,
ObjectType* object)
{
if (object && !object->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* object)
{
MOZ_ASSERT(object);
if (!ValidateObjectAllowDeletedOrNull(info, object))
return false;
if (object->IsDeleted()) {
ErrorInvalidValue("%s: Deleted object passed as argument.", info);
return false;
}
return true;
}
template<class ObjectType>
inline bool
WebGLContext::ValidateObjectAllowNull(const char* info, ObjectType* object)
{
if (!object)
return true;
return ValidateObjectAssumeNonNull(info, object);
}
template<class ObjectType>
inline bool
WebGLContext::ValidateObjectAllowDeleted(const char* info, ObjectType* object)
{
if (!object) {
ErrorInvalidValue("%s: null object passed as argument", info);
return false;
}
return ValidateObjectAllowDeletedOrNull(info, object);
}
template<class ObjectType>
inline bool
WebGLContext::ValidateObject(const char* info, ObjectType* object)
{
if (!object) {
ErrorInvalidValue("%s: null object passed as argument", info);
return false;
}
return ValidateObjectAssumeNonNull(info, object);
}
// Returns `value` rounded to the next highest multiple of `multiple`.
// AKA PadToAlignment, StrideForAlignment.
template<typename V, typename M>
V
RoundUpToMultipleOf(const V& value, const M& multiple)
{
return ((value + multiple - 1) / multiple) * multiple;
}
bool
ValidateTexTarget(WebGLContext* webgl, const char* funcName, uint8_t funcDims,
GLenum rawTexTarget, TexTarget* const out_texTarget,
WebGLTexture** const out_tex);
bool
ValidateTexImageTarget(WebGLContext* webgl, const char* funcName, uint8_t funcDims,
GLenum rawTexImageTarget, TexImageTarget* const out_texImageTarget,
WebGLTexture** const out_tex);
class UniqueBuffer
{
// Like UniquePtr<>, but for void* and malloc/calloc/free.
void* mBuffer;
public:
UniqueBuffer()
: mBuffer(nullptr)
{ }
MOZ_IMPLICIT UniqueBuffer(void* buffer)
: mBuffer(buffer)
{ }
~UniqueBuffer() {
free(mBuffer);
}
UniqueBuffer(UniqueBuffer&& other) {
this->mBuffer = other.mBuffer;
other.mBuffer = nullptr;
}
UniqueBuffer& operator =(UniqueBuffer&& other) {
free(this->mBuffer);
this->mBuffer = other.mBuffer;
other.mBuffer = nullptr;
return *this;
}
UniqueBuffer& operator =(void* newBuffer) {
free(this->mBuffer);
this->mBuffer = newBuffer;
return *this;
}
explicit operator bool() const { return bool(mBuffer); }
void* get() const { return mBuffer; }
UniqueBuffer(const UniqueBuffer& other) = delete; // construct using Move()!
void operator =(const UniqueBuffer& other) = delete; // assign using Move()!
};
class ScopedUnpackReset final
: public gl::ScopedGLWrapper<ScopedUnpackReset>
{
friend struct gl::ScopedGLWrapper<ScopedUnpackReset>;
private:
WebGLContext* const mWebGL;
public:
explicit ScopedUnpackReset(WebGLContext* webgl);
private:
void UnwrapImpl();
};
class ScopedFBRebinder final
: public gl::ScopedGLWrapper<ScopedFBRebinder>
{
friend struct gl::ScopedGLWrapper<ScopedFBRebinder>;
private:
WebGLContext* const mWebGL;
public:
explicit ScopedFBRebinder(WebGLContext* webgl)
: ScopedGLWrapper<ScopedFBRebinder>(webgl->gl)
, mWebGL(webgl)
{ }
private:
void UnwrapImpl();
};
void
ComputeLengthAndData(const dom::ArrayBufferViewOrSharedArrayBufferView& view,
void** const out_data, size_t* const out_length,
js::Scalar::Type* const out_type);
void
Intersect(uint32_t srcSize, int32_t dstStartInSrc, uint32_t dstSize,
uint32_t* const out_intStartInSrc, uint32_t* const out_intStartInDst,
uint32_t* const out_intSize);
bool
ZeroTextureData(WebGLContext* webgl, const char* funcName, GLuint tex,
TexImageTarget target, uint32_t level,
const webgl::FormatUsageInfo* usage, uint32_t xOffset, uint32_t yOffset,
uint32_t zOffset, uint32_t width, uint32_t height, uint32_t depth);
////
void
ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& callback,
const std::vector<IndexedBufferBinding>& field,
const char* name, uint32_t flags = 0);
void
ImplCycleCollectionUnlink(std::vector<IndexedBufferBinding>& field);
} // namespace mozilla
#endif
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