Add blendable checks to GL_EXT_color_buffer_float

src/libANGLE/Caps.cpp

@@ -635,11 +635,21 @@ static bool DetermineColorBufferFloatRGBASupport(const TextureCapsMap &textureCa
 // Check for GL_EXT_color_buffer_float
 static bool DetermineColorBufferFloatSupport(const TextureCapsMap &textureCaps)
 {
-    constexpr GLenum requiredFormats[] = {
-        GL_R16F, GL_RG16F, GL_RGBA16F, GL_R32F, GL_RG32F, GL_RGBA32F, GL_R11F_G11F_B10F,
+    constexpr GLenum nonBlendableFormats[] = {
+        GL_R32F,
+        GL_RG32F,
+        GL_RGBA32F,
     };
 
-    return GetFormatSupport(textureCaps, requiredFormats, true, false, true, true, false);
+    constexpr GLenum blendableFormats[] = {
+        GL_R16F,
+        GL_RG16F,
+        GL_RGBA16F,
+        GL_R11F_G11F_B10F,
+    };
+
+    return GetFormatSupport(textureCaps, nonBlendableFormats, true, false, true, true, false) &&
+           GetFormatSupport(textureCaps, blendableFormats, true, false, true, true, true);
 }
 
 // Check for GL_EXT_texture_norm16

src/libANGLE/renderer/d3d/d3d11/renderer11_utils.cpp

@@ -110,6 +110,7 @@ gl::TextureCaps GenerateTextureFormatCaps(gl::Version maxClientVersion,
         (support.query(formatInfo.rtvFormat, D3D11_FORMAT_SUPPORT_RENDER_TARGET)) ||
         (support.query(formatInfo.dsvFormat, D3D11_FORMAT_SUPPORT_DEPTH_STENCIL));
     textureCaps.renderbuffer = textureCaps.textureAttachment;
+    textureCaps.blendable    = textureCaps.renderbuffer;
 
     DXGI_FORMAT renderFormat = DXGI_FORMAT_UNKNOWN;
     if (formatInfo.dsvFormat != DXGI_FORMAT_UNKNOWN)

src/libANGLE/renderer/d3d/d3d9/renderer9_utils.cpp

@@ -459,6 +459,7 @@ static gl::TextureCaps GenerateTextureFormatCaps(GLenum internalFormat,
                                         D3DRTYPE_TEXTURE, d3dFormatInfo.renderFormat));
         }
         textureCaps.renderbuffer = textureCaps.textureAttachment;
+        textureCaps.blendable    = textureCaps.renderbuffer;
 
         textureCaps.sampleCounts.insert(1);
         for (unsigned int i = D3DMULTISAMPLE_2_SAMPLES; i <= D3DMULTISAMPLE_16_SAMPLES; i++)

src/libANGLE/renderer/gl/renderergl_utils.cpp

@@ -255,6 +255,7 @@ static gl::TextureCaps GenerateTextureFormatCaps(const FunctionsGL *functions,
         textureCaps.texturable && MeetsRequirements(functions, formatInfo.filter);
     textureCaps.textureAttachment = MeetsRequirements(functions, formatInfo.textureAttachment);
     textureCaps.renderbuffer      = MeetsRequirements(functions, formatInfo.renderbuffer);
+    textureCaps.blendable         = textureCaps.renderbuffer || textureCaps.textureAttachment;
 
     // Do extra renderability validation for some formats.
     // We require GL_RGBA16F is renderable to expose EXT_color_buffer_half_float but we can't know

src/libANGLE/renderer/vulkan/vk_format_utils.cpp

@@ -32,6 +32,8 @@ void FillTextureFormatCaps(RendererVk *renderer, VkFormat format, gl::TextureCap
         renderer->hasImageFormatFeatureBits(format, VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT);
     outTextureCaps->filterable = renderer->hasImageFormatFeatureBits(
         format, VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT);
+    outTextureCaps->blendable =
+        renderer->hasImageFormatFeatureBits(format, VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BLEND_BIT);
 
     // For renderbuffer and texture attachments we require transfer and sampling for
     // GLES 2.0 CopyTexImage support. Sampling is also required for other features like