Validate texture component type in BGL against its shader module declaration

We have already been validating the component type of a texture matches
the bind group layout. Here is another constraint introduced by
https://github.com/gpuweb/gpuweb/pull/384. For better code reuse,
conversion from wgpu::TextureComponentType to dawn_native::Format::Type
is factored out as a helper function.

Bug: dawn:202
Change-Id: I394497722b4043dc109eca60116224b7a617e02e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/12860
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>

src/dawn_native/Format.cpp

@@ -22,6 +22,15 @@ namespace dawn_native {
 
     // Format
 
+    Format::Type Format::TextureComponentTypeToFormatType(
+        wgpu::TextureComponentType componentType) {
+        // Check that Type correctly mirrors TextureComponentType except for "Other".
+        static_assert(static_cast<Type>(wgpu::TextureComponentType::Float) == Type::Float, "");
+        static_assert(static_cast<Type>(wgpu::TextureComponentType::Sint) == Type::Sint, "");
+        static_assert(static_cast<Type>(wgpu::TextureComponentType::Uint) == Type::Uint, "");
+        return static_cast<Type>(componentType);
+    }
+
     bool Format::IsColor() const {
         return aspect == Aspect::Color;
     }
@@ -44,17 +53,7 @@ namespace dawn_native {
             return false;
         }
 
-        // Check that Type is correctly mirrors TextureComponentType except for "Other".
-        static_assert(static_cast<wgpu::TextureComponentType>(Type::Float) ==
-                          wgpu::TextureComponentType::Float,
-                      "");
-        static_assert(
-            static_cast<wgpu::TextureComponentType>(Type::Sint) == wgpu::TextureComponentType::Sint,
-            "");
-        static_assert(
-            static_cast<wgpu::TextureComponentType>(Type::Uint) == wgpu::TextureComponentType::Uint,
-            "");
-        return static_cast<wgpu::TextureComponentType>(type) == componentType;
+        return TextureComponentTypeToFormatType(componentType) == type;
     }
 
     size_t Format::GetIndex() const {

src/dawn_native/Format.h

@@ -57,6 +57,8 @@ namespace dawn_native {
         uint32_t blockWidth;
         uint32_t blockHeight;
 
+        static Type TextureComponentTypeToFormatType(wgpu::TextureComponentType componentType);
+
         bool IsColor() const;
         bool HasDepth() const;
         bool HasStencil() const;

src/dawn_native/ShaderModule.cpp

@@ -155,6 +155,12 @@ namespace dawn_native {
                 info.id = resource.id;
                 info.base_type_id = resource.base_type_id;
                 info.type = bindingType;
+                if (info.type == wgpu::BindingType::SampledTexture) {
+                    spirv_cross::SPIRType::BaseType textureComponentType =
+                        compiler.get_type(compiler.get_type(info.base_type_id).image.type).basetype;
+                    info.textureComponentType =
+                        SpirvCrossBaseTypeToFormatType(textureComponentType);
+                }
             }
         };
 
@@ -285,6 +291,14 @@ namespace dawn_native {
             if ((layoutInfo.visibilities[i] & StageBit(mExecutionModel)) == 0) {
                 return false;
             }
+
+            if (layoutBindingType == wgpu::BindingType::SampledTexture) {
+                Format::Type layoutTextureComponentType =
+                    Format::TextureComponentTypeToFormatType(layoutInfo.textureComponentTypes[i]);
+                if (layoutTextureComponentType != moduleInfo.textureComponentType) {
+                    return false;
+                }
+            }
         }
 
         return true;

src/dawn_native/ShaderModule.h

@@ -51,6 +51,7 @@ namespace dawn_native {
             uint32_t id;
             uint32_t base_type_id;
             wgpu::BindingType type;
+            Format::Type textureComponentType;
             bool used = false;
         };
         using ModuleBindingInfo =

src/tests/unittests/validation/RenderPipelineValidationTests.cpp

@@ -321,3 +321,42 @@ TEST_F(RenderPipelineValidationTest, SampleCountCompatibilityWithRenderPass) {
         }
     }
 }
+
+// Tests that the texture component type in shader must match the bind group layout.
+TEST_F(RenderPipelineValidationTest, TextureComponentTypeCompatibility) {
+    constexpr uint32_t kNumTextureComponentType = 3u;
+    std::array<const char*, kNumTextureComponentType> kTexturePrefix = {{"", "i", "u"}};
+    std::array<wgpu::TextureComponentType, kNumTextureComponentType> kTextureComponentTypes = {{
+        wgpu::TextureComponentType::Float,
+        wgpu::TextureComponentType::Sint,
+        wgpu::TextureComponentType::Uint,
+    }};
+
+    for (size_t i = 0; i < kNumTextureComponentType; ++i) {
+        for (size_t j = 0; j < kNumTextureComponentType; ++j) {
+            utils::ComboRenderPipelineDescriptor descriptor(device);
+            descriptor.vertexStage.module = vsModule;
+
+            std::ostringstream stream;
+            stream << R"(
+                #version 450
+                layout(set = 0, binding = 0) uniform )"
+                   << kTexturePrefix[i] << R"(texture2D tex;
+                void main() {
+                })";
+            descriptor.cFragmentStage.module = utils::CreateShaderModule(
+                device, utils::SingleShaderStage::Fragment, stream.str().c_str());
+
+            wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
+                device, {{0, wgpu::ShaderStage::Fragment, wgpu::BindingType::SampledTexture, false,
+                          false, wgpu::TextureViewDimension::e2D, kTextureComponentTypes[j]}});
+            descriptor.layout = utils::MakeBasicPipelineLayout(device, &bgl);
+
+            if (i == j) {
+                device.CreateRenderPipeline(&descriptor);
+            } else {
+                ASSERT_DEVICE_ERROR(device.CreateRenderPipeline(&descriptor));
+            }
+        }
+    }
+}