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-rw-r--r--dom/canvas/WebGLExtensionTextureHalfFloat.cpp129
1 files changed, 129 insertions, 0 deletions
diff --git a/dom/canvas/WebGLExtensionTextureHalfFloat.cpp b/dom/canvas/WebGLExtensionTextureHalfFloat.cpp
new file mode 100644
index 000000000..e59f9b232
--- /dev/null
+++ b/dom/canvas/WebGLExtensionTextureHalfFloat.cpp
@@ -0,0 +1,129 @@
+/* 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 "WebGLContext.h"
+#include "WebGLFormats.h"
+
+namespace mozilla {
+
+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 = [&fua, &pi, &dui, &swizzle](webgl::EffectiveFormat effFormat)
+ {
+ auto usage = fua->EditUsage(effFormat);
+ usage->textureSwizzleRGBA = swizzle;
+ fua->AddTexUnpack(usage, pi, dui);
+
+ fua->AllowUnsizedTexFormat(pi, usage);
+ };
+
+ const bool needsSwizzle = gl->IsCoreProfile();
+ MOZ_ASSERT_IF(needsSwizzle, gl->IsSupported(gl::GLFeature::texture_swizzle));
+
+ const bool needsSizedFormat = !gl->IsGLES();
+
+ 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 (needsSizedFormat) {
+ 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 (needsSizedFormat) {
+ 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 (needsSwizzle) {
+ dui = {LOCAL_GL_R16F, LOCAL_GL_RED, driverUnpackType};
+ swizzle = webgl::FormatUsageInfo::kLuminanceSwizzleRGBA;
+ } else if (needsSizedFormat) {
+ dui.internalFormat = LOCAL_GL_LUMINANCE16F_ARB;
+ }
+ fnAdd(webgl::EffectiveFormat::Luminance16F);
+
+ //////
+
+ pi = {LOCAL_GL_ALPHA, LOCAL_GL_HALF_FLOAT_OES};
+ dui = {pi.format, pi.format, driverUnpackType};
+ swizzle = nullptr;
+ if (needsSwizzle) {
+ dui = {LOCAL_GL_R16F, LOCAL_GL_RED, driverUnpackType};
+ swizzle = webgl::FormatUsageInfo::kAlphaSwizzleRGBA;
+ } else if (needsSizedFormat) {
+ dui.internalFormat = LOCAL_GL_ALPHA16F_ARB;
+ }
+ fnAdd(webgl::EffectiveFormat::Alpha16F);
+
+ //////
+
+ pi = {LOCAL_GL_LUMINANCE_ALPHA, LOCAL_GL_HALF_FLOAT_OES};
+ dui = {pi.format, pi.format, driverUnpackType};
+ swizzle = nullptr;
+ if (needsSwizzle) {
+ dui = {LOCAL_GL_RG16F, LOCAL_GL_RG, driverUnpackType};
+ swizzle = webgl::FormatUsageInfo::kLumAlphaSwizzleRGBA;
+ } else if (needsSizedFormat) {
+ dui.internalFormat = LOCAL_GL_LUMINANCE_ALPHA16F_ARB;
+ }
+ fnAdd(webgl::EffectiveFormat::Luminance16FAlpha16F);
+}
+
+WebGLExtensionTextureHalfFloat::~WebGLExtensionTextureHalfFloat()
+{
+}
+
+bool
+WebGLExtensionTextureHalfFloat::IsSupported(const WebGLContext* webgl)
+{
+ 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;
+}
+
+IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionTextureHalfFloat, OES_texture_half_float)
+
+} // namespace mozilla