1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 #include "WebGLExtensions.h"
7
8 #include "GLContext.h"
9 #include "mozilla/dom/WebGLRenderingContextBinding.h"
10 #include "WebGLContext.h"
11 #include "WebGLFormats.h"
12
13 namespace mozilla {
14
WebGLExtensionSRGB(WebGLContext * webgl)15 WebGLExtensionSRGB::WebGLExtensionSRGB(WebGLContext* webgl)
16 : WebGLExtensionBase(webgl) {
17 MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
18
19 gl::GLContext* gl = webgl->GL();
20 if (!gl->IsGLES()) {
21 // Desktop OpenGL requires the following to be enabled in order to
22 // support sRGB operations on framebuffers.
23 gl->fEnable(LOCAL_GL_FRAMEBUFFER_SRGB_EXT);
24 }
25
26 auto& fua = webgl->mFormatUsage;
27
28 RefPtr<gl::GLContext> gl_ = gl; // Bug 1201275
29 const auto fnAdd = [&fua, &gl_](webgl::EffectiveFormat effFormat,
30 GLenum format, GLenum desktopUnpackFormat) {
31 auto usage = fua->EditUsage(effFormat);
32 usage->isFilterable = true;
33
34 webgl::DriverUnpackInfo dui = {format, format, LOCAL_GL_UNSIGNED_BYTE};
35 const auto pi = dui.ToPacking();
36
37 if (!gl_->IsGLES()) dui.unpackFormat = desktopUnpackFormat;
38
39 fua->AddTexUnpack(usage, pi, dui);
40
41 fua->AllowUnsizedTexFormat(pi, usage);
42 };
43
44 fnAdd(webgl::EffectiveFormat::SRGB8, LOCAL_GL_SRGB, LOCAL_GL_RGB);
45 fnAdd(webgl::EffectiveFormat::SRGB8_ALPHA8, LOCAL_GL_SRGB_ALPHA,
46 LOCAL_GL_RGBA);
47
48 auto usage = fua->EditUsage(webgl::EffectiveFormat::SRGB8_ALPHA8);
49 usage->SetRenderable();
50 fua->AllowRBFormat(LOCAL_GL_SRGB8_ALPHA8, usage);
51 }
52
IsSupported(const WebGLContext * const webgl)53 bool WebGLExtensionSRGB::IsSupported(const WebGLContext* const webgl) {
54 if (webgl->IsWebGL2()) return false;
55
56 return webgl->gl->IsSupported(gl::GLFeature::sRGB);
57 }
58
59 } // namespace mozilla
60