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/. */
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"
16 using namespace mozilla
;
19 WebGLExtensionDrawBuffers::WebGLExtensionDrawBuffers(WebGLContext
* context
)
20 : WebGLExtensionBase(context
)
22 GLint maxColorAttachments
= 0;
23 GLint maxDrawBuffers
= 0;
25 gl::GLContext
* gl
= context
->GL();
27 context
->MakeContextCurrent();
29 gl
->fGetIntegerv(LOCAL_GL_MAX_COLOR_ATTACHMENTS
, &maxColorAttachments
);
30 gl
->fGetIntegerv(LOCAL_GL_MAX_DRAW_BUFFERS
, &maxDrawBuffers
);
32 // WEBGL_draw_buffers specifications don't give a maximal value reachable by MAX_COLOR_ATTACHMENTS.
33 maxColorAttachments
= std::min(maxColorAttachments
, GLint(WebGLContext::kMaxColorAttachments
));
35 if (context
->MinCapabilityMode())
37 maxColorAttachments
= std::min(maxColorAttachments
, GLint(sMinColorAttachments
));
40 // WEBGL_draw_buffers specifications request MAX_COLOR_ATTACHMENTS >= MAX_DRAW_BUFFERS.
41 maxDrawBuffers
= std::min(maxDrawBuffers
, GLint(maxColorAttachments
));
43 context
->mGLMaxColorAttachments
= maxColorAttachments
;
44 context
->mGLMaxDrawBuffers
= maxDrawBuffers
;
47 WebGLExtensionDrawBuffers::~WebGLExtensionDrawBuffers()
51 void WebGLExtensionDrawBuffers::DrawBuffersWEBGL(const dom::Sequence
<GLenum
>& buffers
)
54 return mContext
->ErrorInvalidOperation("drawBuffersWEBGL: Extension is lost.");
56 mContext
->DrawBuffers(buffers
);
59 bool WebGLExtensionDrawBuffers::IsSupported(const WebGLContext
* context
)
61 gl::GLContext
* gl
= context
->GL();
63 if (!gl
->IsSupported(GLFeature::draw_buffers
)) {
67 GLint supportedColorAttachments
= 0;
68 GLint supportedDrawBuffers
= 0;
70 context
->MakeContextCurrent();
72 gl
->fGetIntegerv(LOCAL_GL_MAX_COLOR_ATTACHMENTS
, &supportedColorAttachments
);
73 gl
->fGetIntegerv(LOCAL_GL_MAX_COLOR_ATTACHMENTS
, &supportedDrawBuffers
);
75 if (size_t(supportedColorAttachments
) < sMinColorAttachments
){
76 // WEBGL_draw_buffers specifications request for 4 color attachments at least.
80 if (size_t(supportedDrawBuffers
) < sMinDrawBuffers
){
87 IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionDrawBuffers
)