mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
134 lines
4.1 KiB
C++
134 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebGL2Context.h"
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#include "GLContext.h"
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#include "mozilla/dom/WebGL2RenderingContextBinding.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/Telemetry.h"
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using namespace mozilla;
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using namespace mozilla::gl;
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// -----------------------------------------------------------------------------
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// CONSTRUCTOR & DESTRUCTOR
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WebGL2Context::WebGL2Context()
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: WebGLContext()
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{
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MOZ_ASSERT(IsSupported(), "not supposed to create a WebGL2Context"
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"context when not supported");
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}
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WebGL2Context::~WebGL2Context()
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{
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}
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// -----------------------------------------------------------------------------
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// STATIC FUNCTIONS
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bool
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WebGL2Context::IsSupported()
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{
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return Preferences::GetBool("webgl.enable-prototype-webgl2", false);
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}
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WebGL2Context*
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WebGL2Context::Create()
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{
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return new WebGL2Context();
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}
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// -----------------------------------------------------------------------------
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// IMPLEMENT nsWrapperCache
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JSObject*
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WebGL2Context::WrapObject(JSContext *cx)
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{
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return dom::WebGL2RenderingContextBinding::Wrap(cx, this);
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}
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// -----------------------------------------------------------------------------
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// WebGL 2 initialisation
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bool
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WebGLContext::InitWebGL2()
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{
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MOZ_ASSERT(IsWebGL2(), "WebGLContext is not a WebGL 2 context!");
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const WebGLExtensionID sExtensionNativelySupportedArr[] = {
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WebGLExtensionID::ANGLE_instanced_arrays,
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WebGLExtensionID::EXT_blend_minmax,
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WebGLExtensionID::EXT_sRGB,
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WebGLExtensionID::OES_element_index_uint,
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WebGLExtensionID::OES_standard_derivatives,
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WebGLExtensionID::OES_texture_float,
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WebGLExtensionID::OES_texture_float_linear,
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WebGLExtensionID::OES_texture_half_float,
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WebGLExtensionID::OES_texture_half_float_linear,
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WebGLExtensionID::OES_vertex_array_object,
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WebGLExtensionID::WEBGL_depth_texture,
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WebGLExtensionID::WEBGL_draw_buffers
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};
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const GLFeature sFeatureRequiredArr[] = {
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GLFeature::instanced_non_arrays,
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GLFeature::transform_feedback2,
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GLFeature::invalidate_framebuffer
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};
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// check WebGL extensions that are supposed to be natively supported
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for (size_t i = 0; i < size_t(MOZ_ARRAY_LENGTH(sExtensionNativelySupportedArr)); i++)
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{
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WebGLExtensionID extension = sExtensionNativelySupportedArr[i];
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if (!IsExtensionSupported(extension)) {
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GenerateWarning("WebGL 2 requires %s!", GetExtensionString(extension));
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return false;
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}
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}
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// check required OpenGL extensions
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if (!gl->IsExtensionSupported(GLContext::EXT_gpu_shader4)) {
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GenerateWarning("WebGL 2 requires GL_EXT_gpu_shader4!");
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return false;
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}
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// check OpenGL features
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if (!gl->IsSupported(GLFeature::occlusion_query) &&
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!gl->IsSupported(GLFeature::occlusion_query_boolean))
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{
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/*
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* on desktop, we fake occlusion_query_boolean with occlusion_query if
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* necessary. See WebGLContextAsyncQueries.cpp.
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*/
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GenerateWarning("WebGL 2 requires occlusion queries!");
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return false;
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}
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for (size_t i = 0; i < size_t(MOZ_ARRAY_LENGTH(sFeatureRequiredArr)); i++)
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{
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if (!gl->IsSupported(sFeatureRequiredArr[i])) {
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GenerateWarning("WebGL 2 requires GLFeature::%s!", GLContext::GetFeatureName(sFeatureRequiredArr[i]));
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return false;
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}
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}
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// ok WebGL 2 is compatible, we can enable natively supported extensions.
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for (size_t i = 0; i < size_t(MOZ_ARRAY_LENGTH(sExtensionNativelySupportedArr)); i++) {
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EnableExtension(sExtensionNativelySupportedArr[i]);
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MOZ_ASSERT(IsExtensionEnabled(sExtensionNativelySupportedArr[i]));
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}
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// we initialise WebGL 2 related stuff.
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gl->GetUIntegerv(LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS, &mGLMaxTransformFeedbackSeparateAttribs);
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return true;
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}
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