/* -*- 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 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::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(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