The Tor Browser / file comparison
comparison: content/canvas/src/WebGLExtensionDrawBuffers.cpp
content/canvas/src/WebGLExtensionDrawBuffers.cpp
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
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| -1:000000000000 | 0:0cc3e5970d27 |
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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 4 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "WebGLContext.h" | |
| 7 #include "WebGLExtensions.h" | |
| 8 #include "mozilla/dom/WebGLRenderingContextBinding.h" | |
| 9 #include "WebGLTexture.h" | |
| 10 #include "WebGLRenderbuffer.h" | |
| 11 #include "WebGLFramebuffer.h" | |
| 12 #include "GLContext.h" | |
| 13 | |
| 14 #include <algorithm> | |
| 15 | |
| 16 using namespace mozilla; | |
| 17 using namespace gl; | |
| 18 | |
| 19 WebGLExtensionDrawBuffers::WebGLExtensionDrawBuffers(WebGLContext* context) | |
| 20 : WebGLExtensionBase(context) | |
| 21 { | |
| 22 GLint maxColorAttachments = 0; | |
| 23 GLint maxDrawBuffers = 0; | |
| 24 | |
| 25 gl::GLContext* gl = context->GL(); | |
| 26 | |
| 27 context->MakeContextCurrent(); | |
| 28 | |
| 29 gl->fGetIntegerv(LOCAL_GL_MAX_COLOR_ATTACHMENTS, &maxColorAttachments); | |
| 30 gl->fGetIntegerv(LOCAL_GL_MAX_DRAW_BUFFERS, &maxDrawBuffers); | |
| 31 | |
| 32 // WEBGL_draw_buffers specifications don't give a maximal value reachable by MAX_COLOR_ATTACHMENTS. | |
| 33 maxColorAttachments = std::min(maxColorAttachments, GLint(WebGLContext::sMaxColorAttachments)); | |
| 34 | |
| 35 if (context->MinCapabilityMode()) | |
| 36 { | |
| 37 maxColorAttachments = std::min(maxColorAttachments, GLint(sMinColorAttachments)); | |
| 38 } | |
| 39 | |
| 40 // WEBGL_draw_buffers specifications request MAX_COLOR_ATTACHMENTS >= MAX_DRAW_BUFFERS. | |
| 41 maxDrawBuffers = std::min(maxDrawBuffers, GLint(maxColorAttachments)); | |
| 42 | |
| 43 context->mGLMaxColorAttachments = maxColorAttachments; | |
| 44 context->mGLMaxDrawBuffers = maxDrawBuffers; | |
| 45 } | |
| 46 | |
| 47 WebGLExtensionDrawBuffers::~WebGLExtensionDrawBuffers() | |
| 48 { | |
| 49 } | |
| 50 | |
| 51 void WebGLExtensionDrawBuffers::DrawBuffersWEBGL(const dom::Sequence<GLenum>& buffers) | |
| 52 { | |
| 53 if (mIsLost) | |
| 54 return mContext->ErrorInvalidOperation("drawBuffersWEBGL: Extension is lost."); | |
| 55 | |
| 56 mContext->DrawBuffers(buffers); | |
| 57 } | |
| 58 | |
| 59 bool WebGLExtensionDrawBuffers::IsSupported(const WebGLContext* context) | |
| 60 { | |
| 61 gl::GLContext * gl = context->GL(); | |
| 62 | |
| 63 if (!gl->IsSupported(GLFeature::draw_buffers)) { | |
| 64 return false; | |
| 65 } | |
| 66 | |
| 67 GLint supportedColorAttachments = 0; | |
| 68 GLint supportedDrawBuffers = 0; | |
| 69 | |
| 70 context->MakeContextCurrent(); | |
| 71 | |
| 72 gl->fGetIntegerv(LOCAL_GL_MAX_COLOR_ATTACHMENTS, &supportedColorAttachments); | |
| 73 gl->fGetIntegerv(LOCAL_GL_MAX_COLOR_ATTACHMENTS, &supportedDrawBuffers); | |
| 74 | |
| 75 if (size_t(supportedColorAttachments) < sMinColorAttachments){ | |
| 76 // WEBGL_draw_buffers specifications request for 4 color attachments at least. | |
| 77 return false; | |
| 78 } | |
| 79 | |
| 80 if (size_t(supportedDrawBuffers) < sMinDrawBuffers){ | |
| 81 return false; | |
| 82 } | |
| 83 | |
| 84 return true; | |
| 85 } | |
| 86 | |
| 87 IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionDrawBuffers) |
