The Tor Browser / file comparison
comparison: content/canvas/src/WebGL2Context.cpp
content/canvas/src/WebGL2Context.cpp
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
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| -1:000000000000 | 0:6ef85d6bf388 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 20; 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 | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "WebGL2Context.h" | |
| 7 #include "GLContext.h" | |
| 8 #include "mozilla/dom/WebGL2RenderingContextBinding.h" | |
| 9 #include "mozilla/Preferences.h" | |
| 10 #include "mozilla/Telemetry.h" | |
| 11 | |
| 12 using namespace mozilla; | |
| 13 using namespace mozilla::gl; | |
| 14 | |
| 15 // ----------------------------------------------------------------------------- | |
| 16 // CONSTRUCTOR & DESTRUCTOR | |
| 17 | |
| 18 WebGL2Context::WebGL2Context() | |
| 19 : WebGLContext() | |
| 20 { | |
| 21 MOZ_ASSERT(IsSupported(), "not supposed to create a WebGL2Context" | |
| 22 "context when not supported"); | |
| 23 } | |
| 24 | |
| 25 WebGL2Context::~WebGL2Context() | |
| 26 { | |
| 27 | |
| 28 } | |
| 29 | |
| 30 | |
| 31 // ----------------------------------------------------------------------------- | |
| 32 // STATIC FUNCTIONS | |
| 33 | |
| 34 bool | |
| 35 WebGL2Context::IsSupported() | |
| 36 { | |
| 37 return Preferences::GetBool("webgl.enable-prototype-webgl2", false); | |
| 38 } | |
| 39 | |
| 40 WebGL2Context* | |
| 41 WebGL2Context::Create() | |
| 42 { | |
| 43 return new WebGL2Context(); | |
| 44 } | |
| 45 | |
| 46 | |
| 47 // ----------------------------------------------------------------------------- | |
| 48 // IMPLEMENT nsWrapperCache | |
| 49 | |
| 50 JSObject* | |
| 51 WebGL2Context::WrapObject(JSContext *cx) | |
| 52 { | |
| 53 return dom::WebGL2RenderingContextBinding::Wrap(cx, this); | |
| 54 } | |
| 55 | |
| 56 | |
| 57 // ----------------------------------------------------------------------------- | |
| 58 // WebGL 2 initialisation | |
| 59 | |
| 60 bool | |
| 61 WebGLContext::InitWebGL2() | |
| 62 { | |
| 63 MOZ_ASSERT(IsWebGL2(), "WebGLContext is not a WebGL 2 context!"); | |
| 64 | |
| 65 const WebGLExtensionID sExtensionNativelySupportedArr[] = { | |
| 66 WebGLExtensionID::ANGLE_instanced_arrays, | |
| 67 WebGLExtensionID::OES_element_index_uint, | |
| 68 WebGLExtensionID::OES_standard_derivatives, | |
| 69 WebGLExtensionID::OES_texture_float, | |
| 70 WebGLExtensionID::OES_texture_float_linear, | |
| 71 WebGLExtensionID::OES_vertex_array_object, | |
| 72 WebGLExtensionID::WEBGL_depth_texture, | |
| 73 WebGLExtensionID::WEBGL_draw_buffers | |
| 74 }; | |
| 75 const GLFeature sFeatureRequiredArr[] = { | |
| 76 GLFeature::blend_minmax, | |
| 77 GLFeature::instanced_non_arrays, | |
| 78 GLFeature::transform_feedback | |
| 79 }; | |
| 80 | |
| 81 // check WebGL extensions that are supposed to be natively supported | |
| 82 for (size_t i = 0; i < size_t(MOZ_ARRAY_LENGTH(sExtensionNativelySupportedArr)); i++) | |
| 83 { | |
| 84 WebGLExtensionID extension = sExtensionNativelySupportedArr[i]; | |
| 85 | |
| 86 if (!IsExtensionSupported(extension)) { | |
| 87 GenerateWarning("WebGL 2 requires %s!", GetExtensionString(extension)); | |
| 88 return false; | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 // check required OpenGL extensions | |
| 93 if (!gl->IsExtensionSupported(GLContext::EXT_gpu_shader4)) { | |
| 94 GenerateWarning("WebGL 2 requires GL_EXT_gpu_shader4!"); | |
| 95 return false; | |
| 96 } | |
| 97 | |
| 98 // check OpenGL features | |
| 99 if (!gl->IsSupported(GLFeature::occlusion_query) && | |
| 100 !gl->IsSupported(GLFeature::occlusion_query_boolean)) | |
| 101 { | |
| 102 /* | |
| 103 * on desktop, we fake occlusion_query_boolean with occlusion_query if | |
| 104 * necessary. See WebGLContextAsyncQueries.cpp. | |
| 105 */ | |
| 106 GenerateWarning("WebGL 2 requires occlusion queries!"); | |
| 107 return false; | |
| 108 } | |
| 109 | |
| 110 for (size_t i = 0; i < size_t(MOZ_ARRAY_LENGTH(sFeatureRequiredArr)); i++) | |
| 111 { | |
| 112 if (!gl->IsSupported(sFeatureRequiredArr[i])) { | |
| 113 GenerateWarning("WebGL 2 requires GLFeature::%s!", GLContext::GetFeatureName(sFeatureRequiredArr[i])); | |
| 114 return false; | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 // ok WebGL 2 is compatible, we can enable natively supported extensions. | |
| 119 for (size_t i = 0; i < size_t(MOZ_ARRAY_LENGTH(sExtensionNativelySupportedArr)); i++) { | |
| 120 EnableExtension(sExtensionNativelySupportedArr[i]); | |
| 121 | |
| 122 MOZ_ASSERT(IsExtensionEnabled(sExtensionNativelySupportedArr[i])); | |
| 123 } | |
| 124 | |
| 125 // we initialise WebGL 2 related stuff. | |
| 126 gl->GetUIntegerv(LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS, &mGLMaxTransformFeedbackSeparateAttribs); | |
| 127 | |
| 128 return true; | |
| 129 } |
