Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1022 insertions, 0 deletions

diff --git a/dom/canvas/WebGLExtensions.cpp b/dom/canvas/WebGLExtensions.cpp
new file mode 100644
index 0000000000..e1a8961a40
--- /dev/null
+++ b/dom/canvas/WebGLExtensions.cpp
@@ -0,0 +1,1022 @@
+/* -*- Mode: C++; tab-width: 20; 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 "WebGLExtensions.h"
+
+#include "GLContext.h"
+#include "mozilla/dom/WebGLRenderingContextBinding.h"
+#include "mozilla/StaticPrefs_webgl.h"
+#include "WebGLContext.h"
+
+namespace mozilla {
+
+WebGLExtensionBlendMinMax::WebGLExtensionBlendMinMax(WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionBlendMinMax::IsSupported(const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  return webgl->GL()->IsSupported(gl::GLFeature::blend_minmax);
+}
+
+// -
+
+WebGLExtensionColorBufferFloat::WebGLExtensionColorBufferFloat(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+  SetRenderable(webgl::FormatRenderableState::Implicit(
+      WebGLExtensionID::WEBGL_color_buffer_float));
+}
+
+void WebGLExtensionColorBufferFloat::SetRenderable(
+    const webgl::FormatRenderableState state) {
+  auto& fua = mContext->mFormatUsage;
+
+  auto fnUpdateUsage = [&](GLenum sizedFormat,
+                           webgl::EffectiveFormat effFormat) {
+    auto usage = fua->EditUsage(effFormat);
+    usage->SetRenderable(state);
+    fua->AllowRBFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) fnUpdateUsage(LOCAL_GL_##x, webgl::EffectiveFormat::x)
+
+  // The extension doesn't actually add RGB32F; only RGBA32F.
+  FOO(RGBA32F);
+
+#undef FOO
+}
+
+void WebGLExtensionColorBufferFloat::OnSetExplicit() {
+  SetRenderable(webgl::FormatRenderableState::Explicit());
+}
+
+bool WebGLExtensionColorBufferFloat::IsSupported(const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  const auto& gl = webgl->gl;
+  return gl->IsSupported(gl::GLFeature::renderbuffer_color_float) &&
+         gl->IsSupported(gl::GLFeature::frag_color_float);
+}
+
+// -
+
+WebGLExtensionColorBufferHalfFloat::WebGLExtensionColorBufferHalfFloat(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+  SetRenderable(webgl::FormatRenderableState::Implicit(
+      WebGLExtensionID::EXT_color_buffer_half_float));
+}
+
+void WebGLExtensionColorBufferHalfFloat::SetRenderable(
+    const webgl::FormatRenderableState state) {
+  auto& fua = mContext->mFormatUsage;
+
+  auto fnUpdateUsage = [&](GLenum sizedFormat, webgl::EffectiveFormat effFormat,
+                           const bool renderable) {
+    auto usage = fua->EditUsage(effFormat);
+    if (renderable) {
+      usage->SetRenderable(state);
+    }
+    fua->AllowRBFormat(sizedFormat, usage, renderable);
+  };
+
+#define FOO(x, y) fnUpdateUsage(LOCAL_GL_##x, webgl::EffectiveFormat::x, y)
+
+  FOO(RGBA16F, true);
+  FOO(RGB16F, false);  // It's not required, thus not portable. (Also there's a
+                       // wicked driver bug on Mac+Intel)
+
+#undef FOO
+}
+
+void WebGLExtensionColorBufferHalfFloat::OnSetExplicit() {
+  SetRenderable(webgl::FormatRenderableState::Explicit());
+}
+
+bool WebGLExtensionColorBufferHalfFloat::IsSupported(
+    const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  const auto& gl = webgl->gl;
+  return gl->IsSupported(gl::GLFeature::renderbuffer_color_half_float) &&
+         gl->IsSupported(gl::GLFeature::frag_color_float);
+}
+
+// -
+
+WebGLExtensionCompressedTextureASTC::WebGLExtensionCompressedTextureASTC(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+
+  RefPtr<WebGLContext> webgl_ = webgl;  // Bug 1201275
+  const auto fnAdd = [&webgl_](GLenum sizedFormat,
+                               webgl::EffectiveFormat effFormat) {
+    auto& fua = webgl_->mFormatUsage;
+
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) LOCAL_GL_##x, webgl::EffectiveFormat::x
+
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_4x4_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_5x4_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_5x5_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_6x5_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_6x6_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_8x5_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_8x6_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_8x8_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_10x5_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_10x6_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_10x8_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_10x10_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_12x10_KHR));
+  fnAdd(FOO(COMPRESSED_RGBA_ASTC_12x12_KHR));
+
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR));
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR));
+
+#undef FOO
+}
+
+bool WebGLExtensionCompressedTextureASTC::IsSupported(
+    const WebGLContext* webgl) {
+  gl::GLContext* gl = webgl->GL();
+  return gl->IsExtensionSupported(
+      gl::GLContext::KHR_texture_compression_astc_ldr);
+}
+
+// -
+
+WebGLExtensionCompressedTextureBPTC::WebGLExtensionCompressedTextureBPTC(
+    WebGLContext* const webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+
+  auto& fua = webgl->mFormatUsage;
+
+  const auto fnAdd = [&](const GLenum sizedFormat,
+                         const webgl::EffectiveFormat effFormat) {
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define _(X) LOCAL_GL_##X, webgl::EffectiveFormat::X
+
+  fnAdd(_(COMPRESSED_RGBA_BPTC_UNORM));
+  fnAdd(_(COMPRESSED_SRGB_ALPHA_BPTC_UNORM));
+  fnAdd(_(COMPRESSED_RGB_BPTC_SIGNED_FLOAT));
+  fnAdd(_(COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT));
+
+#undef _
+}
+
+bool WebGLExtensionCompressedTextureBPTC::IsSupported(
+    const WebGLContext* const webgl) {
+  return webgl->gl->IsSupported(gl::GLFeature::texture_compression_bptc);
+}
+
+// -
+
+WebGLExtensionCompressedTextureES3::WebGLExtensionCompressedTextureES3(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  // GLES 3.0.4, p147, table 3.19
+  // GLES 3.0.4, p286+, $C.1 "ETC Compressed Texture Image Formats"
+  // Note that all compressed texture formats are filterable:
+  // GLES 3.0.4 p161:
+  // "[A] texture is complete unless any of the following conditions hold true:
+  //  [...]
+  //  * The effective internal format specified for the texture arrays is a
+  //    sized internal color format that is not texture-filterable (see table
+  //    3.13) and [the mag filter requires filtering]."
+  // Compressed formats are not sized internal color formats, and indeed they
+  // are not listed in table 3.13.
+
+  RefPtr<WebGLContext> webgl_ = webgl;  // Bug 1201275
+  const auto fnAdd = [&webgl_](GLenum sizedFormat,
+                               webgl::EffectiveFormat effFormat) {
+    auto& fua = webgl_->mFormatUsage;
+
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) LOCAL_GL_##x, webgl::EffectiveFormat::x
+
+  fnAdd(FOO(COMPRESSED_R11_EAC));
+  fnAdd(FOO(COMPRESSED_SIGNED_R11_EAC));
+  fnAdd(FOO(COMPRESSED_RG11_EAC));
+  fnAdd(FOO(COMPRESSED_SIGNED_RG11_EAC));
+  fnAdd(FOO(COMPRESSED_RGB8_ETC2));
+  fnAdd(FOO(COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2));
+  fnAdd(FOO(COMPRESSED_RGBA8_ETC2_EAC));
+
+  // sRGB support is manadatory in GL 4.3 and GL ES 3.0, which are the only
+  // versions to support ETC2.
+  fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ETC2_EAC));
+  fnAdd(FOO(COMPRESSED_SRGB8_ETC2));
+  fnAdd(FOO(COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2));
+
+#undef FOO
+}
+
+// -
+
+WebGLExtensionCompressedTextureETC1::WebGLExtensionCompressedTextureETC1(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  RefPtr<WebGLContext> webgl_ = webgl;  // Bug 1201275
+  const auto fnAdd = [&webgl_](GLenum sizedFormat,
+                               webgl::EffectiveFormat effFormat) {
+    auto& fua = webgl_->mFormatUsage;
+
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) LOCAL_GL_##x, webgl::EffectiveFormat::x
+
+  fnAdd(FOO(ETC1_RGB8_OES));
+
+#undef FOO
+}
+
+// -
+
+WebGLExtensionCompressedTexturePVRTC::WebGLExtensionCompressedTexturePVRTC(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  RefPtr<WebGLContext> webgl_ = webgl;  // Bug 1201275
+  const auto fnAdd = [&webgl_](GLenum sizedFormat,
+                               webgl::EffectiveFormat effFormat) {
+    auto& fua = webgl_->mFormatUsage;
+
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) LOCAL_GL_##x, webgl::EffectiveFormat::x
+
+  fnAdd(FOO(COMPRESSED_RGB_PVRTC_4BPPV1));
+  fnAdd(FOO(COMPRESSED_RGB_PVRTC_2BPPV1));
+  fnAdd(FOO(COMPRESSED_RGBA_PVRTC_4BPPV1));
+  fnAdd(FOO(COMPRESSED_RGBA_PVRTC_2BPPV1));
+
+#undef FOO
+}
+
+// -
+
+WebGLExtensionCompressedTextureRGTC::WebGLExtensionCompressedTextureRGTC(
+    WebGLContext* const webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+
+  auto& fua = webgl->mFormatUsage;
+
+  const auto fnAdd = [&](const GLenum sizedFormat,
+                         const webgl::EffectiveFormat effFormat) {
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define _(X) LOCAL_GL_##X, webgl::EffectiveFormat::X
+
+  fnAdd(_(COMPRESSED_RED_RGTC1));
+  fnAdd(_(COMPRESSED_SIGNED_RED_RGTC1));
+  fnAdd(_(COMPRESSED_RG_RGTC2));
+  fnAdd(_(COMPRESSED_SIGNED_RG_RGTC2));
+
+#undef _
+}
+
+bool WebGLExtensionCompressedTextureRGTC::IsSupported(
+    const WebGLContext* const webgl) {
+  return webgl->gl->IsSupported(gl::GLFeature::texture_compression_rgtc);
+}
+
+// -
+
+WebGLExtensionCompressedTextureS3TC::WebGLExtensionCompressedTextureS3TC(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  RefPtr<WebGLContext> webgl_ = webgl;  // Bug 1201275
+  const auto fnAdd = [&webgl_](GLenum sizedFormat,
+                               webgl::EffectiveFormat effFormat) {
+    auto& fua = webgl_->mFormatUsage;
+
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) LOCAL_GL_##x, webgl::EffectiveFormat::x
+
+  fnAdd(FOO(COMPRESSED_RGB_S3TC_DXT1_EXT));
+  fnAdd(FOO(COMPRESSED_RGBA_S3TC_DXT1_EXT));
+  fnAdd(FOO(COMPRESSED_RGBA_S3TC_DXT3_EXT));
+  fnAdd(FOO(COMPRESSED_RGBA_S3TC_DXT5_EXT));
+
+#undef FOO
+}
+
+bool WebGLExtensionCompressedTextureS3TC::IsSupported(
+    const WebGLContext* webgl) {
+  gl::GLContext* gl = webgl->GL();
+  if (gl->IsExtensionSupported(gl::GLContext::EXT_texture_compression_s3tc))
+    return true;
+
+  return gl->IsExtensionSupported(
+             gl::GLContext::EXT_texture_compression_dxt1) &&
+         gl->IsExtensionSupported(
+             gl::GLContext::ANGLE_texture_compression_dxt3) &&
+         gl->IsExtensionSupported(
+             gl::GLContext::ANGLE_texture_compression_dxt5);
+}
+
+// -
+
+WebGLExtensionCompressedTextureS3TC_SRGB::
+    WebGLExtensionCompressedTextureS3TC_SRGB(WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  RefPtr<WebGLContext> webgl_ = webgl;  // Bug 1201275
+  const auto fnAdd = [&webgl_](GLenum sizedFormat,
+                               webgl::EffectiveFormat effFormat) {
+    auto& fua = webgl_->mFormatUsage;
+
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) LOCAL_GL_##x, webgl::EffectiveFormat::x
+
+  fnAdd(FOO(COMPRESSED_SRGB_S3TC_DXT1_EXT));
+  fnAdd(FOO(COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT));
+  fnAdd(FOO(COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT));
+  fnAdd(FOO(COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT));
+
+#undef FOO
+}
+
+bool WebGLExtensionCompressedTextureS3TC_SRGB::IsSupported(
+    const WebGLContext* webgl) {
+  gl::GLContext* gl = webgl->GL();
+  if (gl->IsGLES())
+    return gl->IsExtensionSupported(
+        gl::GLContext::EXT_texture_compression_s3tc_srgb);
+
+  // Desktop GL is more complicated: It's EXT_texture_sRGB, when
+  // EXT_texture_compression_s3tc is supported, that enables srgb+s3tc.
+  return gl->IsExtensionSupported(gl::GLContext::EXT_texture_sRGB) &&
+         gl->IsExtensionSupported(gl::GLContext::EXT_texture_compression_s3tc);
+}
+
+// -
+
+WebGLExtensionDepthTexture::WebGLExtensionDepthTexture(
+    WebGLContext* const webgl)
+    : WebGLExtensionBase(webgl) {
+  auto& fua = webgl->mFormatUsage;
+
+  const auto fnAdd = [&fua](webgl::EffectiveFormat effFormat,
+                            GLenum unpackFormat, GLenum unpackType) {
+    auto usage = fua->EditUsage(effFormat);
+    MOZ_ASSERT(usage->isFilterable);
+    MOZ_ASSERT(usage->IsRenderable());
+
+    const webgl::PackingInfo pi = {unpackFormat, unpackType};
+    const webgl::DriverUnpackInfo dui = {unpackFormat, unpackFormat,
+                                         unpackType};
+    fua->AddTexUnpack(usage, pi, dui);
+    fua->AllowUnsizedTexFormat(pi, usage);
+  };
+
+  fnAdd(webgl::EffectiveFormat::DEPTH_COMPONENT16, LOCAL_GL_DEPTH_COMPONENT,
+        LOCAL_GL_UNSIGNED_SHORT);
+  fnAdd(webgl::EffectiveFormat::DEPTH_COMPONENT24, LOCAL_GL_DEPTH_COMPONENT,
+        LOCAL_GL_UNSIGNED_INT);
+  fnAdd(webgl::EffectiveFormat::DEPTH24_STENCIL8, LOCAL_GL_DEPTH_STENCIL,
+        LOCAL_GL_UNSIGNED_INT_24_8);
+}
+
+bool WebGLExtensionDepthTexture::IsSupported(const WebGLContext* const webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  // WEBGL_depth_texture supports DEPTH_STENCIL textures
+  const auto& gl = webgl->gl;
+  if (!gl->IsSupported(gl::GLFeature::packed_depth_stencil)) return false;
+
+  return gl->IsSupported(gl::GLFeature::depth_texture) ||
+         gl->IsExtensionSupported(gl::GLContext::ANGLE_depth_texture);
+}
+
+// -
+
+WebGLExtensionDisjointTimerQuery::WebGLExtensionDisjointTimerQuery(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionDisjointTimerQuery::IsSupported(
+    const WebGLContext* const webgl) {
+  if (!StaticPrefs::webgl_enable_privileged_extensions()) return false;
+
+  gl::GLContext* gl = webgl->GL();
+  return gl->IsSupported(gl::GLFeature::query_objects) &&
+         gl->IsSupported(gl::GLFeature::get_query_object_i64v) &&
+         gl->IsSupported(
+             gl::GLFeature::query_counter);  // provides GL_TIMESTAMP
+}
+
+// -
+
+WebGLExtensionDrawBuffers::WebGLExtensionDrawBuffers(WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionDrawBuffers::IsSupported(const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  gl::GLContext* gl = webgl->GL();
+  if (gl->IsGLES() && gl->Version() >= 300) {
+    // ANGLE's shader translator can't translate ESSL1 exts to ESSL3. (bug
+    // 1524804)
+    return false;
+  }
+  return gl->IsSupported(gl::GLFeature::draw_buffers);
+}
+
+// -
+
+WebGLExtensionExplicitPresent::WebGLExtensionExplicitPresent(
+    WebGLContext* const webgl)
+    : WebGLExtensionBase(webgl) {
+  if (!IsSupported(webgl)) {
+    NS_WARNING(
+        "Constructing WebGLExtensionExplicitPresent but IsSupported() is "
+        "false!");
+    // This was previously an assert, but it seems like we get races against
+    // StaticPrefs changes/initialization?
+  }
+}
+
+bool WebGLExtensionExplicitPresent::IsSupported(
+    const WebGLContext* const webgl) {
+  return StaticPrefs::webgl_enable_draft_extensions();
+}
+
+// -
+
+WebGLExtensionEXTColorBufferFloat::WebGLExtensionEXTColorBufferFloat(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+
+  auto& fua = webgl->mFormatUsage;
+
+  auto fnUpdateUsage = [&fua](GLenum sizedFormat,
+                              webgl::EffectiveFormat effFormat) {
+    auto usage = fua->EditUsage(effFormat);
+    usage->SetRenderable();
+    fua->AllowRBFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) fnUpdateUsage(LOCAL_GL_##x, webgl::EffectiveFormat::x)
+
+  FOO(R16F);
+  FOO(RG16F);
+  FOO(RGBA16F);
+
+  FOO(R32F);
+  FOO(RG32F);
+  FOO(RGBA32F);
+
+  FOO(R11F_G11F_B10F);
+
+#undef FOO
+}
+
+/*static*/
+bool WebGLExtensionEXTColorBufferFloat::IsSupported(const WebGLContext* webgl) {
+  if (!webgl->IsWebGL2()) return false;
+
+  const gl::GLContext* gl = webgl->GL();
+  return gl->IsSupported(gl::GLFeature::EXT_color_buffer_float);
+}
+
+// -
+
+WebGLExtensionFBORenderMipmap::WebGLExtensionFBORenderMipmap(
+    WebGLContext* const webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionFBORenderMipmap::IsSupported(
+    const WebGLContext* const webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  const auto& gl = webgl->gl;
+  if (!gl->IsGLES()) return true;
+  if (gl->Version() >= 300) return true;
+  return gl->IsExtensionSupported(gl::GLContext::OES_fbo_render_mipmap);
+}
+
+// -
+
+WebGLExtensionFloatBlend::WebGLExtensionFloatBlend(WebGLContext* const webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionFloatBlend::IsSupported(const WebGLContext* const webgl) {
+  if (!WebGLExtensionColorBufferFloat::IsSupported(webgl) &&
+      !WebGLExtensionEXTColorBufferFloat::IsSupported(webgl))
+    return false;
+
+  const auto& gl = webgl->gl;
+  if (!gl->IsGLES() && gl->Version() >= 300) return true;
+  if (gl->IsGLES() && gl->Version() >= 320) return true;
+  return gl->IsExtensionSupported(gl::GLContext::EXT_float_blend);
+}
+
+// -
+
+WebGLExtensionFragDepth::WebGLExtensionFragDepth(WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionFragDepth::IsSupported(const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  gl::GLContext* gl = webgl->GL();
+  if (gl->IsGLES() && gl->Version() >= 300) {
+    // ANGLE's shader translator can't translate ESSL1 exts to ESSL3. (bug
+    // 1524804)
+    return false;
+  }
+  return gl->IsSupported(gl::GLFeature::frag_depth);
+}
+
+// -
+
+WebGLExtensionInstancedArrays::WebGLExtensionInstancedArrays(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionInstancedArrays::IsSupported(const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  gl::GLContext* gl = webgl->GL();
+  return gl->IsSupported(gl::GLFeature::draw_instanced) &&
+         gl->IsSupported(gl::GLFeature::instanced_arrays);
+}
+
+// -
+
+WebGLExtensionMultiview::WebGLExtensionMultiview(WebGLContext* const webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionMultiview::IsSupported(const WebGLContext* const webgl) {
+  if (!webgl->IsWebGL2()) return false;
+
+  const auto& gl = webgl->gl;
+  return gl->IsSupported(gl::GLFeature::multiview);
+}
+
+// -
+
+WebGLExtensionShaderTextureLod::WebGLExtensionShaderTextureLod(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionShaderTextureLod::IsSupported(const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  gl::GLContext* gl = webgl->GL();
+  if (gl->IsGLES() && gl->Version() >= 300) {
+    // ANGLE's shader translator doesn't yet translate
+    // WebGL1+EXT_shader_texture_lod to ES3. (Bug 1491221)
+    return false;
+  }
+  return gl->IsSupported(gl::GLFeature::shader_texture_lod);
+}
+
+// -
+
+WebGLExtensionSRGB::WebGLExtensionSRGB(WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+
+  gl::GLContext* gl = webgl->GL();
+  if (!gl->IsGLES()) {
+    // Desktop OpenGL requires the following to be enabled in order to
+    // support sRGB operations on framebuffers.
+    gl->fEnable(LOCAL_GL_FRAMEBUFFER_SRGB_EXT);
+  }
+
+  auto& fua = webgl->mFormatUsage;
+
+  RefPtr<gl::GLContext> gl_ = gl;  // Bug 1201275
+  const auto fnAdd = [&fua, &gl_](webgl::EffectiveFormat effFormat,
+                                  GLenum format, GLenum desktopUnpackFormat) {
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+
+    webgl::DriverUnpackInfo dui = {format, format, LOCAL_GL_UNSIGNED_BYTE};
+    const auto pi = dui.ToPacking();
+
+    if (!gl_->IsGLES()) dui.unpackFormat = desktopUnpackFormat;
+
+    fua->AddTexUnpack(usage, pi, dui);
+
+    fua->AllowUnsizedTexFormat(pi, usage);
+  };
+
+  fnAdd(webgl::EffectiveFormat::SRGB8, LOCAL_GL_SRGB, LOCAL_GL_RGB);
+  fnAdd(webgl::EffectiveFormat::SRGB8_ALPHA8, LOCAL_GL_SRGB_ALPHA,
+        LOCAL_GL_RGBA);
+
+  auto usage = fua->EditUsage(webgl::EffectiveFormat::SRGB8_ALPHA8);
+  usage->SetRenderable();
+  fua->AllowRBFormat(LOCAL_GL_SRGB8_ALPHA8, usage);
+}
+
+bool WebGLExtensionSRGB::IsSupported(const WebGLContext* const webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  return webgl->gl->IsSupported(gl::GLFeature::sRGB);
+}
+
+// -
+
+WebGLExtensionTextureFloat::WebGLExtensionTextureFloat(WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl));
+
+  auto& fua = webgl->mFormatUsage;
+  gl::GLContext* gl = webgl->GL();
+
+  webgl::PackingInfo pi;
+  webgl::DriverUnpackInfo dui;
+  const GLint* swizzle = nullptr;
+
+  const auto fnAdd = [&](webgl::EffectiveFormat effFormat) {
+    MOZ_ASSERT_IF(swizzle, gl->IsSupported(gl::GLFeature::texture_swizzle));
+
+    auto usage = fua->EditUsage(effFormat);
+    usage->textureSwizzleRGBA = swizzle;
+    fua->AddTexUnpack(usage, pi, dui);
+
+    fua->AllowUnsizedTexFormat(pi, usage);
+  };
+
+  bool useSizedFormats = true;
+  const bool hasSizedLegacyFormats = gl->IsCompatibilityProfile();
+  if (gl->IsGLES() && gl->Version() < 300) {
+    useSizedFormats = false;
+  }
+
+  ////////////////
+
+  pi = {LOCAL_GL_RGBA, LOCAL_GL_FLOAT};
+  dui = {pi.format, pi.format, pi.type};
+  swizzle = nullptr;
+  if (useSizedFormats || gl->IsExtensionSupported(
+                             gl::GLContext::CHROMIUM_color_buffer_float_rgba)) {
+    // ANGLE only exposes renderable RGBA32F via
+    // CHROMIUM_color_buffer_float_rgba, which uses sized formats.
+    dui.internalFormat = LOCAL_GL_RGBA32F;
+  }
+  fnAdd(webgl::EffectiveFormat::RGBA32F);
+
+  //////
+
+  pi = {LOCAL_GL_RGB, LOCAL_GL_FLOAT};
+  dui = {pi.format, pi.format, pi.type};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    dui.internalFormat = LOCAL_GL_RGB32F;
+  }
+  fnAdd(webgl::EffectiveFormat::RGB32F);
+
+  //////
+
+  pi = {LOCAL_GL_LUMINANCE, LOCAL_GL_FLOAT};
+  dui = {pi.format, pi.format, pi.type};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    if (hasSizedLegacyFormats) {
+      dui.internalFormat = LOCAL_GL_LUMINANCE32F_ARB;
+    } else {
+      dui.internalFormat = LOCAL_GL_R32F;
+      dui.unpackFormat = LOCAL_GL_RED;
+      swizzle = webgl::FormatUsageInfo::kLuminanceSwizzleRGBA;
+    }
+  }
+  fnAdd(webgl::EffectiveFormat::Luminance32F);
+
+  //////
+
+  pi = {LOCAL_GL_ALPHA, LOCAL_GL_FLOAT};
+  dui = {pi.format, pi.format, pi.type};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    if (hasSizedLegacyFormats) {
+      dui.internalFormat = LOCAL_GL_ALPHA32F_ARB;
+    } else {
+      dui.internalFormat = LOCAL_GL_R32F;
+      dui.unpackFormat = LOCAL_GL_RED;
+      swizzle = webgl::FormatUsageInfo::kAlphaSwizzleRGBA;
+    }
+  }
+  fnAdd(webgl::EffectiveFormat::Alpha32F);
+
+  //////
+
+  pi = {LOCAL_GL_LUMINANCE_ALPHA, LOCAL_GL_FLOAT};
+  dui = {pi.format, pi.format, pi.type};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    if (hasSizedLegacyFormats) {
+      dui.internalFormat = LOCAL_GL_LUMINANCE_ALPHA32F_ARB;
+    } else {
+      dui.internalFormat = LOCAL_GL_RG32F;
+      dui.unpackFormat = LOCAL_GL_RG;
+      swizzle = webgl::FormatUsageInfo::kLumAlphaSwizzleRGBA;
+    }
+  }
+  fnAdd(webgl::EffectiveFormat::Luminance32FAlpha32F);
+}
+
+bool WebGLExtensionTextureFloat::IsSupported(const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  gl::GLContext* gl = webgl->GL();
+  if (!gl->IsSupported(gl::GLFeature::texture_float)) return false;
+
+  const bool needsSwizzle = gl->IsCoreProfile();
+  const bool hasSwizzle = gl->IsSupported(gl::GLFeature::texture_swizzle);
+  if (needsSwizzle && !hasSwizzle) return false;
+
+  return true;
+}
+
+// -
+
+WebGLExtensionTextureFloatLinear::WebGLExtensionTextureFloatLinear(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  auto& fua = webgl->mFormatUsage;
+
+  fua->EditUsage(webgl::EffectiveFormat::RGBA32F)->isFilterable = true;
+  fua->EditUsage(webgl::EffectiveFormat::RGB32F)->isFilterable = true;
+
+  if (webgl->IsWebGL2()) {
+    fua->EditUsage(webgl::EffectiveFormat::R32F)->isFilterable = true;
+    fua->EditUsage(webgl::EffectiveFormat::RG32F)->isFilterable = true;
+  } else {
+    fua->EditUsage(webgl::EffectiveFormat::Luminance32FAlpha32F)->isFilterable =
+        true;
+    fua->EditUsage(webgl::EffectiveFormat::Luminance32F)->isFilterable = true;
+    fua->EditUsage(webgl::EffectiveFormat::Alpha32F)->isFilterable = true;
+  }
+}
+
+// -
+
+WebGLExtensionTextureHalfFloat::WebGLExtensionTextureHalfFloat(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  auto& fua = webgl->mFormatUsage;
+  gl::GLContext* gl = webgl->GL();
+
+  webgl::PackingInfo pi;
+  webgl::DriverUnpackInfo dui;
+  const GLint* swizzle = nullptr;
+
+  const auto fnAdd = [&](webgl::EffectiveFormat effFormat) {
+    MOZ_ASSERT_IF(swizzle, gl->IsSupported(gl::GLFeature::texture_swizzle));
+
+    auto usage = fua->EditUsage(effFormat);
+    usage->textureSwizzleRGBA = swizzle;
+    fua->AddTexUnpack(usage, pi, dui);
+
+    fua->AllowUnsizedTexFormat(pi, usage);
+  };
+
+  bool useSizedFormats = true;
+  const bool hasSizedLegacyFormats = gl->IsCompatibilityProfile();
+  if (gl->IsGLES() && gl->Version() < 300) {
+    useSizedFormats = false;
+  }
+
+  GLenum driverUnpackType = LOCAL_GL_HALF_FLOAT;
+  if (!gl->IsSupported(gl::GLFeature::texture_half_float)) {
+    MOZ_ASSERT(gl->IsExtensionSupported(gl::GLContext::OES_texture_half_float));
+    driverUnpackType = LOCAL_GL_HALF_FLOAT_OES;
+  }
+
+  ////////////////
+
+  pi = {LOCAL_GL_RGBA, LOCAL_GL_HALF_FLOAT_OES};
+  dui = {pi.format, pi.format, driverUnpackType};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    dui.internalFormat = LOCAL_GL_RGBA16F;
+  }
+  fnAdd(webgl::EffectiveFormat::RGBA16F);
+
+  //////
+
+  pi = {LOCAL_GL_RGB, LOCAL_GL_HALF_FLOAT_OES};
+  dui = {pi.format, pi.format, driverUnpackType};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    dui.internalFormat = LOCAL_GL_RGB16F;
+  }
+  fnAdd(webgl::EffectiveFormat::RGB16F);
+
+  //////
+
+  pi = {LOCAL_GL_LUMINANCE, LOCAL_GL_HALF_FLOAT_OES};
+  dui = {pi.format, pi.format, driverUnpackType};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    if (hasSizedLegacyFormats) {
+      dui.internalFormat = LOCAL_GL_LUMINANCE16F_ARB;
+    } else {
+      dui.internalFormat = LOCAL_GL_R16F;
+      dui.unpackFormat = LOCAL_GL_RED;
+      swizzle = webgl::FormatUsageInfo::kLuminanceSwizzleRGBA;
+    }
+  }
+  fnAdd(webgl::EffectiveFormat::Luminance16F);
+
+  //////
+
+  pi = {LOCAL_GL_ALPHA, LOCAL_GL_HALF_FLOAT_OES};
+  dui = {pi.format, pi.format, driverUnpackType};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    if (hasSizedLegacyFormats) {
+      dui.internalFormat = LOCAL_GL_ALPHA16F_ARB;
+    } else {
+      dui.internalFormat = LOCAL_GL_R16F;
+      dui.unpackFormat = LOCAL_GL_RED;
+      swizzle = webgl::FormatUsageInfo::kAlphaSwizzleRGBA;
+    }
+  }
+  fnAdd(webgl::EffectiveFormat::Alpha16F);
+
+  //////
+
+  pi = {LOCAL_GL_LUMINANCE_ALPHA, LOCAL_GL_HALF_FLOAT_OES};
+  dui = {pi.format, pi.format, driverUnpackType};
+  swizzle = nullptr;
+  if (useSizedFormats) {
+    if (hasSizedLegacyFormats) {
+      dui.internalFormat = LOCAL_GL_LUMINANCE_ALPHA16F_ARB;
+    } else {
+      dui.internalFormat = LOCAL_GL_RG16F;
+      dui.unpackFormat = LOCAL_GL_RG;
+      swizzle = webgl::FormatUsageInfo::kLumAlphaSwizzleRGBA;
+    }
+  }
+  fnAdd(webgl::EffectiveFormat::Luminance16FAlpha16F);
+}
+
+bool WebGLExtensionTextureHalfFloat::IsSupported(const WebGLContext* webgl) {
+  if (webgl->IsWebGL2()) return false;
+
+  gl::GLContext* gl = webgl->GL();
+  if (!gl->IsSupported(gl::GLFeature::texture_half_float) &&
+      !gl->IsExtensionSupported(gl::GLContext::OES_texture_half_float)) {
+    return false;
+  }
+
+  const bool needsSwizzle = gl->IsCoreProfile();
+  const bool hasSwizzle = gl->IsSupported(gl::GLFeature::texture_swizzle);
+  if (needsSwizzle && !hasSwizzle) return false;
+
+  return true;
+}
+
+// -
+
+WebGLExtensionTextureHalfFloatLinear::WebGLExtensionTextureHalfFloatLinear(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(!webgl->IsWebGL2());
+  auto& fua = webgl->mFormatUsage;
+
+  fua->EditUsage(webgl::EffectiveFormat::RGBA16F)->isFilterable = true;
+  fua->EditUsage(webgl::EffectiveFormat::RGB16F)->isFilterable = true;
+  fua->EditUsage(webgl::EffectiveFormat::Luminance16FAlpha16F)->isFilterable =
+      true;
+  fua->EditUsage(webgl::EffectiveFormat::Luminance16F)->isFilterable = true;
+  fua->EditUsage(webgl::EffectiveFormat::Alpha16F)->isFilterable = true;
+}
+
+// -
+
+bool WebGLExtensionTextureNorm16::IsSupported(const WebGLContext* const webgl) {
+  if (!StaticPrefs::webgl_enable_draft_extensions()) return false;
+  if (!webgl->IsWebGL2()) return false;
+
+  const auto& gl = webgl->gl;
+
+  // ANGLE's support is broken in our checkout.
+  if (gl->IsANGLE()) return false;
+
+  return gl->IsSupported(gl::GLFeature::texture_norm16);
+}
+
+WebGLExtensionTextureNorm16::WebGLExtensionTextureNorm16(WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  if (!IsSupported(webgl)) {
+    NS_WARNING(
+        "Constructing WebGLExtensionTextureNorm16 but IsSupported() is "
+        "false!");
+    // This was previously an assert, but it seems like we get races against
+    // StaticPrefs changes/initialization?
+  }
+
+  auto& fua = *webgl->mFormatUsage;
+
+  const auto fnAdd = [&](webgl::EffectiveFormat effFormat,
+                         const bool renderable, const webgl::PackingInfo& pi) {
+    auto& usage = *fua.EditUsage(effFormat);
+    const auto& format = *usage.format;
+
+    const auto dui =
+        webgl::DriverUnpackInfo{format.sizedFormat, pi.format, pi.type};
+    fua.AddTexUnpack(&usage, pi, dui);
+
+    fua.AllowSizedTexFormat(format.sizedFormat, &usage);
+    fua.AllowUnsizedTexFormat(pi, &usage);
+
+    if (renderable) {
+      usage.SetRenderable();
+      fua.AllowRBFormat(format.sizedFormat, &usage);
+    }
+  };
+
+  fnAdd(webgl::EffectiveFormat::R16, true,
+        {LOCAL_GL_RED, LOCAL_GL_UNSIGNED_SHORT});
+  fnAdd(webgl::EffectiveFormat::RG16, true,
+        {LOCAL_GL_RG, LOCAL_GL_UNSIGNED_SHORT});
+  fnAdd(webgl::EffectiveFormat::RGB16, false,
+        {LOCAL_GL_RGB, LOCAL_GL_UNSIGNED_SHORT});
+  fnAdd(webgl::EffectiveFormat::RGBA16, true,
+        {LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_SHORT});
+
+  fnAdd(webgl::EffectiveFormat::R16_SNORM, false,
+        {LOCAL_GL_RED, LOCAL_GL_SHORT});
+  fnAdd(webgl::EffectiveFormat::RG16_SNORM, false,
+        {LOCAL_GL_RG, LOCAL_GL_SHORT});
+  fnAdd(webgl::EffectiveFormat::RGB16_SNORM, false,
+        {LOCAL_GL_RGB, LOCAL_GL_SHORT});
+  fnAdd(webgl::EffectiveFormat::RGBA16_SNORM, false,
+        {LOCAL_GL_RGBA, LOCAL_GL_SHORT});
+}
+
+}  // namespace mozilla