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
12 namespace mozilla {
13
WebGLExtensionDepthTexture(WebGLContext * const webgl)14 WebGLExtensionDepthTexture::WebGLExtensionDepthTexture(
15 WebGLContext* const webgl)
16 : WebGLExtensionBase(webgl) {
17 auto& fua = webgl->mFormatUsage;
18
19 const auto fnAdd = [&fua](webgl::EffectiveFormat effFormat,
20 GLenum unpackFormat, GLenum unpackType) {
21 auto usage = fua->EditUsage(effFormat);
22 MOZ_ASSERT(usage->isFilterable);
23 MOZ_ASSERT(usage->IsRenderable());
24
25 const webgl::PackingInfo pi = {unpackFormat, unpackType};
26 const webgl::DriverUnpackInfo dui = {unpackFormat, unpackFormat,
27 unpackType};
28 fua->AddTexUnpack(usage, pi, dui);
29 fua->AllowUnsizedTexFormat(pi, usage);
30 };
31
32 fnAdd(webgl::EffectiveFormat::DEPTH_COMPONENT16, LOCAL_GL_DEPTH_COMPONENT,
33 LOCAL_GL_UNSIGNED_SHORT);
34 fnAdd(webgl::EffectiveFormat::DEPTH_COMPONENT24, LOCAL_GL_DEPTH_COMPONENT,
35 LOCAL_GL_UNSIGNED_INT);
36 fnAdd(webgl::EffectiveFormat::DEPTH24_STENCIL8, LOCAL_GL_DEPTH_STENCIL,
37 LOCAL_GL_UNSIGNED_INT_24_8);
38 }
39
IsSupported(const WebGLContext * const webgl)40 bool WebGLExtensionDepthTexture::IsSupported(const WebGLContext* const webgl) {
41 if (webgl->IsWebGL2()) return false;
42
43 // WEBGL_depth_texture supports DEPTH_STENCIL textures
44 const auto& gl = webgl->gl;
45 if (!gl->IsSupported(gl::GLFeature::packed_depth_stencil)) return false;
46
47 return gl->IsSupported(gl::GLFeature::depth_texture) ||
48 gl->IsExtensionSupported(gl::GLContext::ANGLE_depth_texture);
49 }
50
51 } // namespace mozilla
52