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Mypal/dom/canvas/WebGLRenderbuffer.cpp

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/* -*- Mode: C++; tab-width: 20; 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/. */
#include "WebGLRenderbuffer.h"
#include "GLContext.h"
#include "mozilla/dom/WebGLRenderingContextBinding.h"
#include "ScopedGLHelpers.h"
#include "WebGLContext.h"
#include "WebGLStrongTypes.h"
#include "WebGLTexture.h"
namespace mozilla {
static GLenum
DepthFormatForDepthStencilEmu(gl::GLContext* gl)
{
// We might not be able to get 24-bit, so let's pretend!
if (gl->IsGLES() && !gl->IsExtensionSupported(gl::GLContext::OES_depth24))
return LOCAL_GL_DEPTH_COMPONENT16;
return LOCAL_GL_DEPTH_COMPONENT24;
}
JSObject*
WebGLRenderbuffer::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto)
{
return dom::WebGLRenderbufferBinding::Wrap(cx, this, givenProto);
}
static GLuint
DoCreateRenderbuffer(gl::GLContext* gl)
{
MOZ_ASSERT(gl->IsCurrent());
GLuint ret = 0;
gl->fGenRenderbuffers(1, &ret);
return ret;
}
static bool
EmulatePackedDepthStencil(gl::GLContext* gl)
{
return !gl->IsSupported(gl::GLFeature::packed_depth_stencil);
}
WebGLRenderbuffer::WebGLRenderbuffer(WebGLContext* webgl)
: WebGLRefCountedObject(webgl)
, mPrimaryRB( DoCreateRenderbuffer(webgl->gl) )
, mEmulatePackedDepthStencil( EmulatePackedDepthStencil(webgl->gl) )
, mSecondaryRB(0)
, mFormat(nullptr)
, mSamples(0)
, mImageDataStatus(WebGLImageDataStatus::NoImageData)
, mHasBeenBound(false)
{
mContext->mRenderbuffers.insertBack(this);
}
void
WebGLRenderbuffer::Delete()
{
mContext->MakeContextCurrent();
mContext->gl->fDeleteRenderbuffers(1, &mPrimaryRB);
if (mSecondaryRB)
mContext->gl->fDeleteRenderbuffers(1, &mSecondaryRB);
LinkedListElement<WebGLRenderbuffer>::removeFrom(mContext->mRenderbuffers);
}
int64_t
WebGLRenderbuffer::MemoryUsage() const
{
// If there is no defined format, we're not taking up any memory
if (!mFormat)
return 0;
const auto bytesPerPixel = mFormat->format->estimatedBytesPerPixel;
const int64_t pixels = int64_t(mWidth) * int64_t(mHeight);
const int64_t totalSize = pixels * bytesPerPixel;
return totalSize;
}
static GLenum
DoRenderbufferStorageMaybeMultisample(gl::GLContext* gl, GLsizei samples,
GLenum internalFormat, GLsizei width,
GLsizei height)
{
MOZ_ASSERT_IF(samples >= 1, gl->IsSupported(gl::GLFeature::framebuffer_multisample));
// Certain OpenGL ES renderbuffer formats may not exist on desktop OpenGL.
switch (internalFormat) {
case LOCAL_GL_RGBA4:
case LOCAL_GL_RGB5_A1:
// 16-bit RGBA formats are not supported on desktop GL.
if (!gl->IsGLES())
internalFormat = LOCAL_GL_RGBA8;
break;
case LOCAL_GL_RGB565:
// RGB565 is not supported on desktop GL.
if (!gl->IsGLES())
internalFormat = LOCAL_GL_RGB8;
break;
case LOCAL_GL_DEPTH_COMPONENT16:
if (!gl->IsGLES() || gl->IsExtensionSupported(gl::GLContext::OES_depth24))
internalFormat = LOCAL_GL_DEPTH_COMPONENT24;
else if (gl->IsSupported(gl::GLFeature::packed_depth_stencil))
internalFormat = LOCAL_GL_DEPTH24_STENCIL8;
break;
case LOCAL_GL_DEPTH_STENCIL:
MOZ_CRASH("GFX: GL_DEPTH_STENCIL is not valid here.");
break;
default:
break;
}
gl::GLContext::LocalErrorScope errorScope(*gl);
if (samples > 0) {
gl->fRenderbufferStorageMultisample(LOCAL_GL_RENDERBUFFER, samples,
internalFormat, width, height);
} else {
gl->fRenderbufferStorage(LOCAL_GL_RENDERBUFFER, internalFormat, width, height);
}
return errorScope.GetError();
}
GLenum
WebGLRenderbuffer::DoRenderbufferStorage(uint32_t samples,
const webgl::FormatUsageInfo* format,
uint32_t width, uint32_t height)
{
MOZ_ASSERT(mContext->mBoundRenderbuffer == this);
gl::GLContext* gl = mContext->gl;
MOZ_ASSERT(samples <= 256); // Sanity check.
GLenum primaryFormat = format->format->sizedFormat;
GLenum secondaryFormat = 0;
if (mEmulatePackedDepthStencil && primaryFormat == LOCAL_GL_DEPTH24_STENCIL8) {
primaryFormat = DepthFormatForDepthStencilEmu(gl);
secondaryFormat = LOCAL_GL_STENCIL_INDEX8;
}
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mPrimaryRB);
GLenum error = DoRenderbufferStorageMaybeMultisample(gl, samples, primaryFormat,
width, height);
if (error)
return error;
if (secondaryFormat) {
if (!mSecondaryRB) {
gl->fGenRenderbuffers(1, &mSecondaryRB);
}
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mSecondaryRB);
error = DoRenderbufferStorageMaybeMultisample(gl, samples, secondaryFormat,
width, height);
if (error)
return error;
} else if (mSecondaryRB) {
gl->fDeleteRenderbuffers(1, &mSecondaryRB);
mSecondaryRB = 0;
}
return 0;
}
void
WebGLRenderbuffer::RenderbufferStorage(const char* funcName, uint32_t samples,
GLenum internalFormat, uint32_t width,
uint32_t height)
{
const auto usage = mContext->mFormatUsage->GetRBUsage(internalFormat);
if (!usage) {
mContext->ErrorInvalidEnum("%s: Invalid `internalFormat`: 0x%04x.", funcName,
internalFormat);
return;
}
if (width > mContext->mImplMaxRenderbufferSize ||
height > mContext->mImplMaxRenderbufferSize)
{
mContext->ErrorInvalidValue("%s: Width or height exceeds maximum renderbuffer"
" size.",
funcName);
return;
}
mContext->MakeContextCurrent();
if (!usage->maxSamplesKnown) {
const_cast<webgl::FormatUsageInfo*>(usage)->ResolveMaxSamples(mContext->gl);
}
MOZ_ASSERT(usage->maxSamplesKnown);
if (samples > usage->maxSamples) {
mContext->ErrorInvalidOperation("%s: `samples` is out of the valid range.", funcName);
return;
}
// Validation complete.
const GLenum error = DoRenderbufferStorage(samples, usage, width, height);
if (error) {
const char* errorName = mContext->ErrorName(error);
mContext->GenerateWarning("%s generated error %s", funcName, errorName);
if (error == LOCAL_GL_OUT_OF_MEMORY) {
// Truncate.
mSamples = 0;
mFormat = nullptr;
mWidth = 0;
mHeight = 0;
mImageDataStatus = WebGLImageDataStatus::NoImageData;
InvalidateStatusOfAttachedFBs();
}
return;
}
mSamples = samples;
mFormat = usage;
mWidth = width;
mHeight = height;
mImageDataStatus = WebGLImageDataStatus::UninitializedImageData;
InvalidateStatusOfAttachedFBs();
}
void
WebGLRenderbuffer::DoFramebufferRenderbuffer(FBTarget target, GLenum attachment) const
{
gl::GLContext* gl = mContext->gl;
if (attachment == LOCAL_GL_DEPTH_STENCIL_ATTACHMENT) {
const GLuint stencilRB = (mSecondaryRB ? mSecondaryRB : mPrimaryRB);
gl->fFramebufferRenderbuffer(target.get(), LOCAL_GL_DEPTH_ATTACHMENT,
LOCAL_GL_RENDERBUFFER, mPrimaryRB);
gl->fFramebufferRenderbuffer(target.get(), LOCAL_GL_STENCIL_ATTACHMENT,
LOCAL_GL_RENDERBUFFER, stencilRB);
return;
}
gl->fFramebufferRenderbuffer(target.get(), attachment,
LOCAL_GL_RENDERBUFFER, mPrimaryRB);
}
GLint
WebGLRenderbuffer::GetRenderbufferParameter(RBTarget target,
RBParam pname) const
{
gl::GLContext* gl = mContext->gl;
switch (pname.get()) {
case LOCAL_GL_RENDERBUFFER_STENCIL_SIZE:
if (!mFormat)
return 0;
if (!mFormat->format->s)
return 0;
return 8;
case LOCAL_GL_RENDERBUFFER_SAMPLES:
case LOCAL_GL_RENDERBUFFER_WIDTH:
case LOCAL_GL_RENDERBUFFER_HEIGHT:
case LOCAL_GL_RENDERBUFFER_RED_SIZE:
case LOCAL_GL_RENDERBUFFER_GREEN_SIZE:
case LOCAL_GL_RENDERBUFFER_BLUE_SIZE:
case LOCAL_GL_RENDERBUFFER_ALPHA_SIZE:
case LOCAL_GL_RENDERBUFFER_DEPTH_SIZE:
{
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mPrimaryRB);
GLint i = 0;
gl->fGetRenderbufferParameteriv(target.get(), pname.get(), &i);
return i;
}
case LOCAL_GL_RENDERBUFFER_INTERNAL_FORMAT:
{
GLenum ret = LOCAL_GL_RGBA4;
if (mFormat) {
ret = mFormat->format->sizedFormat;
if (!mContext->IsWebGL2() && ret == LOCAL_GL_DEPTH24_STENCIL8) {
ret = LOCAL_GL_DEPTH_STENCIL;
}
}
return ret;
}
}
MOZ_ASSERT(false, "This function should only be called with valid `pname`.");
return 0;
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLRenderbuffer)
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLRenderbuffer, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLRenderbuffer, Release)
} // namespace mozilla
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