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fune/dom/canvas/WebGLContextExtensions.cpp
Kelsey Gilbert ce8432a312 Bug 1819497 - Don't race on static bool for initialization. r=gfx-reviewers,aosmond 
We could do non-racy static init here (e.g. with a static initializer
self-calling-closure), but there doesn't seem to be a strong reason for
this. Let's just use a switch and get robustness from -Werror=switch.

Differential Revision: https://phabricator.services.mozilla.com/D188054
2023-09-13 21:50:14 +00:00

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGLContext.h"
#include "ClientWebGLExtensions.h"
#include "GLContext.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/ToJSValue.h"
#include "mozilla/EnumeratedRange.h"
#include "mozilla/StaticPrefs_webgl.h"
#include "nsString.h"
#include "WebGLContextUtils.h"
#include "WebGLExtensions.h"
namespace mozilla {
const char* GetExtensionName(const WebGLExtensionID ext) {
switch (ext) {
#define WEBGL_EXTENSION_IDENTIFIER(x) \
case WebGLExtensionID::x: \
return #x;
WEBGL_EXTENSION_IDENTIFIER(ANGLE_instanced_arrays)
WEBGL_EXTENSION_IDENTIFIER(EXT_blend_minmax)
WEBGL_EXTENSION_IDENTIFIER(EXT_color_buffer_float)
WEBGL_EXTENSION_IDENTIFIER(EXT_color_buffer_half_float)
WEBGL_EXTENSION_IDENTIFIER(EXT_disjoint_timer_query)
WEBGL_EXTENSION_IDENTIFIER(EXT_float_blend)
WEBGL_EXTENSION_IDENTIFIER(EXT_frag_depth)
WEBGL_EXTENSION_IDENTIFIER(EXT_shader_texture_lod)
WEBGL_EXTENSION_IDENTIFIER(EXT_sRGB)
WEBGL_EXTENSION_IDENTIFIER(EXT_texture_compression_bptc)
WEBGL_EXTENSION_IDENTIFIER(EXT_texture_compression_rgtc)
WEBGL_EXTENSION_IDENTIFIER(EXT_texture_filter_anisotropic)
WEBGL_EXTENSION_IDENTIFIER(EXT_texture_norm16)
WEBGL_EXTENSION_IDENTIFIER(MOZ_debug)
WEBGL_EXTENSION_IDENTIFIER(OES_draw_buffers_indexed)
WEBGL_EXTENSION_IDENTIFIER(OES_element_index_uint)
WEBGL_EXTENSION_IDENTIFIER(OES_fbo_render_mipmap)
WEBGL_EXTENSION_IDENTIFIER(OES_standard_derivatives)
WEBGL_EXTENSION_IDENTIFIER(OES_texture_float)
WEBGL_EXTENSION_IDENTIFIER(OES_texture_float_linear)
WEBGL_EXTENSION_IDENTIFIER(OES_texture_half_float)
WEBGL_EXTENSION_IDENTIFIER(OES_texture_half_float_linear)
WEBGL_EXTENSION_IDENTIFIER(OES_vertex_array_object)
WEBGL_EXTENSION_IDENTIFIER(OVR_multiview2)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_color_buffer_float)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_compressed_texture_astc)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_compressed_texture_etc)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_compressed_texture_etc1)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_compressed_texture_pvrtc)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_compressed_texture_s3tc)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_compressed_texture_s3tc_srgb)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_debug_renderer_info)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_debug_shaders)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_depth_texture)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_draw_buffers)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_explicit_present)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_lose_context)
WEBGL_EXTENSION_IDENTIFIER(WEBGL_provoking_vertex)
#undef WEBGL_EXTENSION_IDENTIFIER
case WebGLExtensionID::Max:
break;
}
MOZ_CRASH("bad WebGLExtensionID");
}
// ----------------------------
// ClientWebGLContext
void ClientWebGLContext::GetExtension(JSContext* cx, const nsAString& wideName,
JS::MutableHandle<JSObject*> retval,
dom::CallerType callerType,
ErrorResult& rv) {
retval.set(nullptr);
const FuncScope funcScope(*this, "getExtension");
if (IsContextLost()) return;
const auto name = NS_ConvertUTF16toUTF8(wideName);
auto ext = WebGLExtensionID::Max;
// step 1: figure what extension is wanted
for (const auto extension : MakeEnumeratedRange(WebGLExtensionID::Max)) {
const auto& curName = GetExtensionName(extension);
if (name.Equals(curName, nsCaseInsensitiveCStringComparator)) {
ext = extension;
break;
}
}
if (ext == WebGLExtensionID::Max) return;
RefPtr<ClientWebGLExtensionBase> extObj;
if (ext == WebGLExtensionID::WEBGL_lose_context) {
extObj = mExtLoseContext;
} else {
extObj = GetExtension(ext, callerType);
}
if (!extObj) return;
// Ugh, this would be easier returning `any` than `object`.
JS::Rooted<JS::Value> v(cx);
MOZ_ALWAYS_TRUE(dom::ToJSValue(cx, extObj, &v));
if (v.isObject()) {
retval.set(&v.toObject());
}
}
RefPtr<ClientWebGLExtensionBase> ClientWebGLContext::GetExtension(
const WebGLExtensionID ext, const dom::CallerType callerType) {
if (ext == WebGLExtensionID::WEBGL_lose_context) {
// Always the same.
return mExtLoseContext;
}
if (!mNotLost) return nullptr;
if (!IsSupported(ext, callerType)) return nullptr;
auto& extSlot = mNotLost->extensions[UnderlyingValue(ext)];
if (MOZ_UNLIKELY(!extSlot)) {
extSlot = [&]() -> RefPtr<ClientWebGLExtensionBase> {
switch (ext) {
// ANGLE_
case WebGLExtensionID::ANGLE_instanced_arrays:
return new ClientWebGLExtensionInstancedArrays(*this);
// EXT_
case WebGLExtensionID::EXT_blend_minmax:
return new ClientWebGLExtensionBlendMinMax(*this);
case WebGLExtensionID::EXT_color_buffer_float:
return new ClientWebGLExtensionEXTColorBufferFloat(*this);
case WebGLExtensionID::EXT_color_buffer_half_float:
return new ClientWebGLExtensionColorBufferHalfFloat(*this);
case WebGLExtensionID::EXT_disjoint_timer_query:
return new ClientWebGLExtensionDisjointTimerQuery(*this);
case WebGLExtensionID::EXT_float_blend:
return new ClientWebGLExtensionFloatBlend(*this);
case WebGLExtensionID::EXT_frag_depth:
return new ClientWebGLExtensionFragDepth(*this);
case WebGLExtensionID::EXT_shader_texture_lod:
return new ClientWebGLExtensionShaderTextureLod(*this);
case WebGLExtensionID::EXT_sRGB:
return new ClientWebGLExtensionSRGB(*this);
case WebGLExtensionID::EXT_texture_compression_bptc:
return new ClientWebGLExtensionCompressedTextureBPTC(*this);
case WebGLExtensionID::EXT_texture_compression_rgtc:
return new ClientWebGLExtensionCompressedTextureRGTC(*this);
case WebGLExtensionID::EXT_texture_filter_anisotropic:
return new ClientWebGLExtensionTextureFilterAnisotropic(*this);
case WebGLExtensionID::EXT_texture_norm16:
return new ClientWebGLExtensionTextureNorm16(*this);
// MOZ_
case WebGLExtensionID::MOZ_debug:
return new ClientWebGLExtensionMOZDebug(*this);
// OES_
case WebGLExtensionID::OES_draw_buffers_indexed:
return new ClientWebGLExtensionDrawBuffersIndexed(*this);
case WebGLExtensionID::OES_element_index_uint:
return new ClientWebGLExtensionElementIndexUint(*this);
case WebGLExtensionID::OES_fbo_render_mipmap:
return new ClientWebGLExtensionFBORenderMipmap(*this);
case WebGLExtensionID::OES_standard_derivatives:
return new ClientWebGLExtensionStandardDerivatives(*this);
case WebGLExtensionID::OES_texture_float:
return new ClientWebGLExtensionTextureFloat(*this);
case WebGLExtensionID::OES_texture_float_linear:
return new ClientWebGLExtensionTextureFloatLinear(*this);
case WebGLExtensionID::OES_texture_half_float:
return new ClientWebGLExtensionTextureHalfFloat(*this);
case WebGLExtensionID::OES_texture_half_float_linear:
return new ClientWebGLExtensionTextureHalfFloatLinear(*this);
case WebGLExtensionID::OES_vertex_array_object:
return new ClientWebGLExtensionVertexArray(*this);
// OVR_
case WebGLExtensionID::OVR_multiview2:
return new ClientWebGLExtensionMultiview(*this);
// WEBGL_
case WebGLExtensionID::WEBGL_color_buffer_float:
return new ClientWebGLExtensionColorBufferFloat(*this);
case WebGLExtensionID::WEBGL_compressed_texture_astc:
return new ClientWebGLExtensionCompressedTextureASTC(*this);
case WebGLExtensionID::WEBGL_compressed_texture_etc:
return new ClientWebGLExtensionCompressedTextureES3(*this);
case WebGLExtensionID::WEBGL_compressed_texture_etc1:
return new ClientWebGLExtensionCompressedTextureETC1(*this);
case WebGLExtensionID::WEBGL_compressed_texture_pvrtc:
return new ClientWebGLExtensionCompressedTexturePVRTC(*this);
case WebGLExtensionID::WEBGL_compressed_texture_s3tc:
return new ClientWebGLExtensionCompressedTextureS3TC(*this);
case WebGLExtensionID::WEBGL_compressed_texture_s3tc_srgb:
return new ClientWebGLExtensionCompressedTextureS3TC_SRGB(*this);
case WebGLExtensionID::WEBGL_debug_renderer_info: {
if (callerType != dom::CallerType::System) {
JsWarning(
"WEBGL_debug_renderer_info is deprecated in Firefox and will "
"be removed. Please use RENDERER.");
}
return new ClientWebGLExtensionDebugRendererInfo(*this);
}
case WebGLExtensionID::WEBGL_debug_shaders:
return new ClientWebGLExtensionDebugShaders(*this);
case WebGLExtensionID::WEBGL_depth_texture:
return new ClientWebGLExtensionDepthTexture(*this);
case WebGLExtensionID::WEBGL_draw_buffers:
return new ClientWebGLExtensionDrawBuffers(*this);
case WebGLExtensionID::WEBGL_explicit_present:
return new ClientWebGLExtensionExplicitPresent(*this);
case WebGLExtensionID::WEBGL_provoking_vertex:
return new ClientWebGLExtensionProvokingVertex(*this);
case WebGLExtensionID::WEBGL_lose_context:
case WebGLExtensionID::Max:
break;
}
MOZ_CRASH("illegal extension enum");
}();
MOZ_ASSERT(extSlot);
RequestExtension(ext);
}
return extSlot;
}
// ----------------------------
// WebGLContext
bool WebGLContext::IsExtensionSupported(WebGLExtensionID ext) const {
switch (ext) {
case WebGLExtensionID::MOZ_debug:
case WebGLExtensionID::WEBGL_debug_renderer_info:
case WebGLExtensionID::WEBGL_debug_shaders:
case WebGLExtensionID::WEBGL_lose_context:
// Always supported.
return true;
// In alphabetical order
// ANGLE_
case WebGLExtensionID::ANGLE_instanced_arrays:
return WebGLExtensionInstancedArrays::IsSupported(this);
// EXT_
case WebGLExtensionID::EXT_blend_minmax:
return WebGLExtensionBlendMinMax::IsSupported(this);
case WebGLExtensionID::EXT_color_buffer_float:
return WebGLExtensionEXTColorBufferFloat::IsSupported(this);
case WebGLExtensionID::EXT_color_buffer_half_float:
return WebGLExtensionColorBufferHalfFloat::IsSupported(this);
case WebGLExtensionID::EXT_disjoint_timer_query:
return WebGLExtensionDisjointTimerQuery::IsSupported(this);
case WebGLExtensionID::EXT_float_blend:
return WebGLExtensionFloatBlend::IsSupported(this);
case WebGLExtensionID::EXT_frag_depth:
return WebGLExtensionFragDepth::IsSupported(this);
case WebGLExtensionID::EXT_shader_texture_lod:
return WebGLExtensionShaderTextureLod::IsSupported(this);
case WebGLExtensionID::EXT_sRGB:
return WebGLExtensionSRGB::IsSupported(this);
case WebGLExtensionID::EXT_texture_compression_bptc:
return WebGLExtensionCompressedTextureBPTC::IsSupported(this);
case WebGLExtensionID::EXT_texture_compression_rgtc:
return WebGLExtensionCompressedTextureRGTC::IsSupported(this);
case WebGLExtensionID::EXT_texture_filter_anisotropic:
return gl->IsExtensionSupported(
gl::GLContext::EXT_texture_filter_anisotropic);
case WebGLExtensionID::EXT_texture_norm16:
return WebGLExtensionTextureNorm16::IsSupported(this);
// OES_
case WebGLExtensionID::OES_draw_buffers_indexed:
if (!IsWebGL2()) return false;
return gl->IsSupported(gl::GLFeature::draw_buffers_indexed) &&
gl->IsSupported(gl::GLFeature::get_integer_indexed);
case WebGLExtensionID::OES_element_index_uint:
if (IsWebGL2()) return false;
return gl->IsSupported(gl::GLFeature::element_index_uint);
case WebGLExtensionID::OES_fbo_render_mipmap:
return WebGLExtensionFBORenderMipmap::IsSupported(this);
case WebGLExtensionID::OES_standard_derivatives:
if (IsWebGL2()) return false;
return gl->IsSupported(gl::GLFeature::standard_derivatives);
case WebGLExtensionID::OES_texture_float:
return WebGLExtensionTextureFloat::IsSupported(this);
case WebGLExtensionID::OES_texture_float_linear:
return gl->IsSupported(gl::GLFeature::texture_float_linear);
case WebGLExtensionID::OES_texture_half_float:
return WebGLExtensionTextureHalfFloat::IsSupported(this);
case WebGLExtensionID::OES_texture_half_float_linear:
if (IsWebGL2()) return false;
return gl->IsSupported(gl::GLFeature::texture_half_float_linear);
case WebGLExtensionID::OES_vertex_array_object:
return !IsWebGL2(); // Always supported in webgl1.
// OVR_
case WebGLExtensionID::OVR_multiview2:
return WebGLExtensionMultiview::IsSupported(this);
// WEBGL_
case WebGLExtensionID::WEBGL_color_buffer_float:
return WebGLExtensionColorBufferFloat::IsSupported(this);
case WebGLExtensionID::WEBGL_compressed_texture_astc:
return WebGLExtensionCompressedTextureASTC::IsSupported(this);
case WebGLExtensionID::WEBGL_compressed_texture_etc:
return gl->IsSupported(gl::GLFeature::ES3_compatibility) &&
!gl->IsANGLE();
case WebGLExtensionID::WEBGL_compressed_texture_etc1:
return gl->IsExtensionSupported(
gl::GLContext::OES_compressed_ETC1_RGB8_texture) &&
!gl->IsANGLE();
case WebGLExtensionID::WEBGL_compressed_texture_pvrtc:
return gl->IsExtensionSupported(
gl::GLContext::IMG_texture_compression_pvrtc);
case WebGLExtensionID::WEBGL_compressed_texture_s3tc:
return WebGLExtensionCompressedTextureS3TC::IsSupported(this);
case WebGLExtensionID::WEBGL_compressed_texture_s3tc_srgb:
return WebGLExtensionCompressedTextureS3TC_SRGB::IsSupported(this);
case WebGLExtensionID::WEBGL_depth_texture:
return WebGLExtensionDepthTexture::IsSupported(this);
case WebGLExtensionID::WEBGL_draw_buffers:
return WebGLExtensionDrawBuffers::IsSupported(this);
case WebGLExtensionID::WEBGL_explicit_present:
return WebGLExtensionExplicitPresent::IsSupported(this);
case WebGLExtensionID::WEBGL_provoking_vertex:
if (!gl->IsSupported(gl::GLFeature::provoking_vertex)) return false;
// > Implementations SHOULD only expose this extension when
// > FIRST_VERTEX_CONVENTION is more efficient than the default behavior
// > of LAST_VERTEX_CONVENTION.
if (gl->IsANGLE()) return true; // Better on D3D.
if (kIsMacOS) {
// Better on Metal, so probably Mac in general.
return true;
}
return false; // Probably not better for Win+GL, Linux, or Android.
case WebGLExtensionID::Max:
break;
}
MOZ_CRASH();
}
bool WebGLContext::IsExtensionExplicit(const WebGLExtensionID ext) const {
return mExtensions[ext] && mExtensions[ext]->IsExplicit();
}
void WebGLContext::WarnIfImplicit(const WebGLExtensionID ext) const {
const auto& extension = mExtensions[ext];
if (!extension || extension->IsExplicit()) return;
GenerateWarning(
"Using format enabled by implicitly enabled extension: %s. "
"For maximal portability enable it explicitly.",
GetExtensionName(ext));
}
void WebGLContext::RequestExtension(const WebGLExtensionID ext,
const bool explicitly) {
const auto& limits = Limits();
if (!limits.supportedExtensions[ext]) return;
auto& slot = mExtensions[ext];
switch (ext) {
// ANGLE_
case WebGLExtensionID::ANGLE_instanced_arrays:
slot.reset(new WebGLExtensionInstancedArrays(this));
break;
// EXT_
case WebGLExtensionID::EXT_blend_minmax:
slot.reset(new WebGLExtensionBlendMinMax(this));
break;
case WebGLExtensionID::EXT_color_buffer_float:
slot.reset(new WebGLExtensionEXTColorBufferFloat(this));
break;
case WebGLExtensionID::EXT_color_buffer_half_float:
slot.reset(new WebGLExtensionColorBufferHalfFloat(this));
break;
case WebGLExtensionID::EXT_disjoint_timer_query:
slot.reset(new WebGLExtensionDisjointTimerQuery(this));
break;
case WebGLExtensionID::EXT_float_blend:
slot.reset(new WebGLExtensionFloatBlend(this));
break;
case WebGLExtensionID::EXT_frag_depth:
slot.reset(new WebGLExtensionFragDepth(this));
break;
case WebGLExtensionID::EXT_shader_texture_lod:
slot.reset(new WebGLExtensionShaderTextureLod(this));
break;
case WebGLExtensionID::EXT_sRGB:
slot.reset(new WebGLExtensionSRGB(this));
break;
case WebGLExtensionID::EXT_texture_compression_bptc:
slot.reset(new WebGLExtensionCompressedTextureBPTC(this));
break;
case WebGLExtensionID::EXT_texture_compression_rgtc:
slot.reset(new WebGLExtensionCompressedTextureRGTC(this));
break;
case WebGLExtensionID::EXT_texture_filter_anisotropic:
slot.reset(new WebGLExtensionTextureFilterAnisotropic(this));
break;
case WebGLExtensionID::EXT_texture_norm16:
slot.reset(new WebGLExtensionTextureNorm16(this));
break;
// MOZ_
case WebGLExtensionID::MOZ_debug:
slot.reset(new WebGLExtensionMOZDebug(this));
break;
// OES_
case WebGLExtensionID::OES_draw_buffers_indexed:
slot.reset(new WebGLExtensionDrawBuffersIndexed(this));
break;
case WebGLExtensionID::OES_element_index_uint:
slot.reset(new WebGLExtensionElementIndexUint(this));
break;
case WebGLExtensionID::OES_fbo_render_mipmap:
slot.reset(new WebGLExtensionFBORenderMipmap(this));
break;
case WebGLExtensionID::OES_standard_derivatives:
slot.reset(new WebGLExtensionStandardDerivatives(this));
break;
case WebGLExtensionID::OES_texture_float:
slot.reset(new WebGLExtensionTextureFloat(this));
break;
case WebGLExtensionID::OES_texture_float_linear:
slot.reset(new WebGLExtensionTextureFloatLinear(this));
break;
case WebGLExtensionID::OES_texture_half_float:
slot.reset(new WebGLExtensionTextureHalfFloat(this));
break;
case WebGLExtensionID::OES_texture_half_float_linear:
slot.reset(new WebGLExtensionTextureHalfFloatLinear(this));
break;
case WebGLExtensionID::OES_vertex_array_object:
slot.reset(new WebGLExtensionVertexArray(this));
break;
// WEBGL_
case WebGLExtensionID::OVR_multiview2:
slot.reset(new WebGLExtensionMultiview(this));
break;
// WEBGL_
case WebGLExtensionID::WEBGL_color_buffer_float:
slot.reset(new WebGLExtensionColorBufferFloat(this));
break;
case WebGLExtensionID::WEBGL_compressed_texture_astc:
slot.reset(new WebGLExtensionCompressedTextureASTC(this));
break;
case WebGLExtensionID::WEBGL_compressed_texture_etc:
slot.reset(new WebGLExtensionCompressedTextureES3(this));
break;
case WebGLExtensionID::WEBGL_compressed_texture_etc1:
slot.reset(new WebGLExtensionCompressedTextureETC1(this));
break;
case WebGLExtensionID::WEBGL_compressed_texture_pvrtc:
slot.reset(new WebGLExtensionCompressedTexturePVRTC(this));
break;
case WebGLExtensionID::WEBGL_compressed_texture_s3tc:
slot.reset(new WebGLExtensionCompressedTextureS3TC(this));
break;
case WebGLExtensionID::WEBGL_compressed_texture_s3tc_srgb:
slot.reset(new WebGLExtensionCompressedTextureS3TC_SRGB(this));
break;
case WebGLExtensionID::WEBGL_debug_renderer_info:
slot.reset(new WebGLExtensionDebugRendererInfo(this));
break;
case WebGLExtensionID::WEBGL_debug_shaders:
slot.reset(new WebGLExtensionDebugShaders(this));
break;
case WebGLExtensionID::WEBGL_depth_texture:
slot.reset(new WebGLExtensionDepthTexture(this));
break;
case WebGLExtensionID::WEBGL_draw_buffers:
slot.reset(new WebGLExtensionDrawBuffers(this));
break;
case WebGLExtensionID::WEBGL_explicit_present:
slot.reset(new WebGLExtensionExplicitPresent(this));
break;
case WebGLExtensionID::WEBGL_lose_context:
slot.reset(new WebGLExtensionLoseContext(this));
break;
case WebGLExtensionID::WEBGL_provoking_vertex:
slot.reset(new WebGLExtensionProvokingVertex(this));
break;
case WebGLExtensionID::Max:
MOZ_CRASH();
}
MOZ_ASSERT(slot);
const auto& obj = slot;
if (explicitly && !obj->IsExplicit()) {
obj->SetExplicit();
}
// Also enable implied extensions.
switch (ext) {
case WebGLExtensionID::EXT_color_buffer_float:
RequestExtension(WebGLExtensionID::EXT_float_blend, false);
break;
case WebGLExtensionID::OES_texture_float:
RequestExtension(WebGLExtensionID::EXT_float_blend, false);
RequestExtension(WebGLExtensionID::WEBGL_color_buffer_float, false);
break;
case WebGLExtensionID::OES_texture_half_float:
RequestExtension(WebGLExtensionID::EXT_color_buffer_half_float, false);
break;
case WebGLExtensionID::WEBGL_color_buffer_float:
RequestExtension(WebGLExtensionID::EXT_float_blend, false);
break;
default:
break;
}
}
} // namespace mozilla
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