Line data    Source code

       1             : /* This Source Code Form is subject to the terms of the Mozilla Public
       2             :  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
       3             :  * You can obtain one at http://mozilla.org/MPL/2.0/. */
       4             : 
       5             : #include "WebGLExtensions.h"
       6             : 
       7             : #include "GLContext.h"
       8             : #include "mozilla/dom/WebGLRenderingContextBinding.h"
       9             : #include "WebGLContext.h"
      10             : #include "WebGLFormats.h"
      11             : 
      12             : namespace mozilla {
      13             : 
      14           0 : WebGLExtensionTextureHalfFloat::WebGLExtensionTextureHalfFloat(WebGLContext* webgl)
      15           0 :     : WebGLExtensionBase(webgl)
      16             : {
      17           0 :     auto& fua = webgl->mFormatUsage;
      18           0 :     gl::GLContext* gl = webgl->GL();
      19             : 
      20             :     webgl::PackingInfo pi;
      21             :     webgl::DriverUnpackInfo dui;
      22           0 :     const GLint* swizzle = nullptr;
      23             : 
      24           0 :     const auto fnAdd = [&fua, &pi, &dui, &swizzle](webgl::EffectiveFormat effFormat)
      25           0 :     {
      26           0 :         auto usage = fua->EditUsage(effFormat);
      27           0 :         usage->textureSwizzleRGBA = swizzle;
      28           0 :         fua->AddTexUnpack(usage, pi, dui);
      29             : 
      30           0 :         fua->AllowUnsizedTexFormat(pi, usage);
      31           0 :     };
      32             : 
      33           0 :     const bool needsSwizzle = gl->IsCoreProfile();
      34           0 :     MOZ_ASSERT_IF(needsSwizzle, gl->IsSupported(gl::GLFeature::texture_swizzle));
      35             : 
      36           0 :     const bool needsSizedFormat = !gl->IsGLES();
      37             : 
      38           0 :     GLenum driverUnpackType = LOCAL_GL_HALF_FLOAT;
      39           0 :     if (!gl->IsSupported(gl::GLFeature::texture_half_float)) {
      40           0 :         MOZ_ASSERT(gl->IsExtensionSupported(gl::GLContext::OES_texture_half_float));
      41           0 :         driverUnpackType = LOCAL_GL_HALF_FLOAT_OES;
      42             :     }
      43             : 
      44             :     ////////////////
      45             : 
      46           0 :     pi = {LOCAL_GL_RGBA, LOCAL_GL_HALF_FLOAT_OES};
      47           0 :     dui = {pi.format, pi.format, driverUnpackType};
      48           0 :     swizzle = nullptr;
      49           0 :     if (needsSizedFormat) {
      50           0 :         dui.internalFormat = LOCAL_GL_RGBA16F;
      51             :     }
      52           0 :     fnAdd(webgl::EffectiveFormat::RGBA16F);
      53             : 
      54             :     //////
      55             : 
      56           0 :     pi = {LOCAL_GL_RGB, LOCAL_GL_HALF_FLOAT_OES};
      57           0 :     dui = {pi.format, pi.format, driverUnpackType};
      58           0 :     swizzle = nullptr;
      59           0 :     if (needsSizedFormat) {
      60           0 :         dui.internalFormat = LOCAL_GL_RGB16F;
      61             :     }
      62           0 :     fnAdd(webgl::EffectiveFormat::RGB16F);
      63             : 
      64             :     //////
      65             : 
      66           0 :     pi = {LOCAL_GL_LUMINANCE, LOCAL_GL_HALF_FLOAT_OES};
      67           0 :     dui = {pi.format, pi.format, driverUnpackType};
      68           0 :     swizzle = nullptr;
      69           0 :     if (needsSwizzle) {
      70           0 :         dui = {LOCAL_GL_R16F, LOCAL_GL_RED, driverUnpackType};
      71           0 :         swizzle = webgl::FormatUsageInfo::kLuminanceSwizzleRGBA;
      72           0 :     } else if (needsSizedFormat) {
      73           0 :         dui.internalFormat = LOCAL_GL_LUMINANCE16F_ARB;
      74             :     }
      75           0 :     fnAdd(webgl::EffectiveFormat::Luminance16F);
      76             : 
      77             :     //////
      78             : 
      79           0 :     pi = {LOCAL_GL_ALPHA, LOCAL_GL_HALF_FLOAT_OES};
      80           0 :     dui = {pi.format, pi.format, driverUnpackType};
      81           0 :     swizzle = nullptr;
      82           0 :     if (needsSwizzle) {
      83           0 :         dui = {LOCAL_GL_R16F, LOCAL_GL_RED, driverUnpackType};
      84           0 :         swizzle = webgl::FormatUsageInfo::kAlphaSwizzleRGBA;
      85           0 :     } else if (needsSizedFormat) {
      86           0 :         dui.internalFormat = LOCAL_GL_ALPHA16F_ARB;
      87             :     }
      88           0 :     fnAdd(webgl::EffectiveFormat::Alpha16F);
      89             : 
      90             :     //////
      91             : 
      92           0 :     pi = {LOCAL_GL_LUMINANCE_ALPHA, LOCAL_GL_HALF_FLOAT_OES};
      93           0 :     dui = {pi.format, pi.format, driverUnpackType};
      94           0 :     swizzle = nullptr;
      95           0 :     if (needsSwizzle) {
      96           0 :         dui = {LOCAL_GL_RG16F, LOCAL_GL_RG, driverUnpackType};
      97           0 :         swizzle = webgl::FormatUsageInfo::kLumAlphaSwizzleRGBA;
      98           0 :     } else if (needsSizedFormat) {
      99           0 :         dui.internalFormat = LOCAL_GL_LUMINANCE_ALPHA16F_ARB;
     100             :     }
     101           0 :     fnAdd(webgl::EffectiveFormat::Luminance16FAlpha16F);
     102           0 : }
     103             : 
     104           0 : WebGLExtensionTextureHalfFloat::~WebGLExtensionTextureHalfFloat()
     105             : {
     106           0 : }
     107             : 
     108             : bool
     109           0 : WebGLExtensionTextureHalfFloat::IsSupported(const WebGLContext* webgl)
     110             : {
     111           0 :     gl::GLContext* gl = webgl->GL();
     112             : 
     113           0 :     if (!gl->IsSupported(gl::GLFeature::texture_half_float) &&
     114           0 :         !gl->IsExtensionSupported(gl::GLContext::OES_texture_half_float))
     115             :     {
     116           0 :         return false;
     117             :     }
     118             : 
     119           0 :     const bool needsSwizzle = gl->IsCoreProfile();
     120           0 :     const bool hasSwizzle = gl->IsSupported(gl::GLFeature::texture_swizzle);
     121           0 :     if (needsSwizzle && !hasSwizzle)
     122           0 :         return false;
     123             : 
     124           0 :     return true;
     125             : }
     126             : 
     127           0 : IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionTextureHalfFloat, OES_texture_half_float)
     128             : 
     129             : } // namespace mozilla