Allow any GrProcessor to be a Uniform owner.

The `owner` field was previously restricted to GrFragmentProcessor,
which excludes other GrProcessor classes like GrXferProcessors from
using the uniform handlers.

Change-Id: I465190334f0fb1e27393108ab7b18d2d3089e69c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/526461
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

src/gpu/GrSPIRVUniformHandler.cpp

@@ -186,7 +186,7 @@ uint32_t get_ubo_offset(uint32_t* currentOffset, SkSLType type, int arrayCount)
 }  // namespace
 
 GrGLSLUniformHandler::UniformHandle GrSPIRVUniformHandler::internalAddUniformArray(
-        const GrFragmentProcessor* owner,
+        const GrProcessor* owner,
         uint32_t visibility,
         SkSLType type,
         const char* name,

src/gpu/GrSPIRVUniformHandler.h

@@ -54,7 +54,7 @@ private:
     const char* samplerVariable(SamplerHandle handle) const override;
     skgpu::Swizzle samplerSwizzle(SamplerHandle handle) const override;
     void appendUniformDecls(GrShaderFlags visibility, SkString*) const override;
-    UniformHandle internalAddUniformArray(const GrFragmentProcessor* owner,
+    UniformHandle internalAddUniformArray(const GrProcessor* owner,
                                           uint32_t visibility,
                                           SkSLType type,
                                           const char* name,

src/gpu/gl/GrGLUniformHandler.cpp

@@ -26,7 +26,7 @@ bool valid_name(const char* name) {
 }
 
 GrGLSLUniformHandler::UniformHandle GrGLUniformHandler::internalAddUniformArray(
-                                                                   const GrFragmentProcessor* owner,
+                                                                   const GrProcessor* owner,
                                                                    uint32_t visibility,
                                                                    SkSLType type,
                                                                    const char* name,

src/gpu/gl/GrGLUniformHandler.h

@@ -44,7 +44,7 @@ private:
         , fUniforms(kUniformsPerBlock)
         , fSamplers(kUniformsPerBlock) {}
 
-    UniformHandle internalAddUniformArray(const GrFragmentProcessor* owner,
+    UniformHandle internalAddUniformArray(const GrProcessor* owner,
                                           uint32_t visibility,
                                           SkSLType type,
                                           const char* name,

src/gpu/glsl/GrGLSLUniformHandler.cpp

@@ -10,7 +10,7 @@
 #include "src/gpu/glsl/GrGLSL.h"
 #include "src/gpu/glsl/GrGLSLShaderBuilder.h"
 
-GrShaderVar GrGLSLUniformHandler::getUniformMapping(const GrFragmentProcessor& owner,
+GrShaderVar GrGLSLUniformHandler::getUniformMapping(const GrProcessor& owner,
                                                     SkString rawName) const {
     for (int i = this->numUniforms() - 1; i >= 0; i--) {
         const UniformInfo& u = this->uniform(i);
@@ -21,7 +21,7 @@ GrShaderVar GrGLSLUniformHandler::getUniformMapping(const GrFragmentProcessor& o
     return GrShaderVar();
 }
 
-GrShaderVar GrGLSLUniformHandler::liftUniformToVertexShader(const GrFragmentProcessor& owner,
+GrShaderVar GrGLSLUniformHandler::liftUniformToVertexShader(const GrProcessor& owner,
                                                             SkString rawName) {
     for (int i = this->numUniforms() - 1; i >= 0; i--) {
         UniformInfo& u = this->uniform(i);

src/gpu/glsl/GrGLSLUniformHandler.h

@@ -17,6 +17,7 @@
 
 class GrGLSLProgramBuilder;
 class GrGLSLShaderBuilder;
+class GrProcessor;
 class GrSamplerState;
 class GrSurfaceProxy;
 
@@ -32,10 +33,10 @@ struct GrGLSLBuiltinUniformHandles {
 class GrGLSLUniformHandler {
 public:
     struct UniformInfo {
-        GrShaderVar                fVariable;
-        uint32_t                   fVisibility;
-        const GrFragmentProcessor* fOwner;
-        SkString                   fRawName;
+        GrShaderVar        fVariable;
+        uint32_t           fVisibility;
+        const GrProcessor* fOwner;
+        SkString           fRawName;
     };
 
     virtual ~GrGLSLUniformHandler() {}
@@ -50,7 +51,7 @@ public:
         supported at this time. The actual uniform name will be mangled. If outName is not nullptr
         then it will refer to the final uniform name after return. Use the addUniformArray variant
         to add an array of uniforms. */
-    UniformHandle addUniform(const GrFragmentProcessor* owner,
+    UniformHandle addUniform(const GrProcessor* owner,
                              uint32_t visibility,
                              SkSLType type,
                              const char* name,
@@ -59,7 +60,7 @@ public:
         return this->addUniformArray(owner, visibility, type, name, 0, outName);
     }
 
-    UniformHandle addUniformArray(const GrFragmentProcessor* owner,
+    UniformHandle addUniformArray(const GrProcessor* owner,
                                   uint32_t visibility,
                                   SkSLType type,
                                   const char* name,
@@ -85,11 +86,11 @@ public:
 
     // Looks up a uniform that was added by 'owner' with the given 'rawName' (pre-mangling).
     // If there is no such uniform, a variable with type kVoid is returned.
-    GrShaderVar getUniformMapping(const GrFragmentProcessor& owner, SkString rawName) const;
+    GrShaderVar getUniformMapping(const GrProcessor& owner, SkString rawName) const;
 
     // Like getUniformMapping(), but if the uniform is found it also marks it as accessible in
     // the vertex shader.
-    GrShaderVar liftUniformToVertexShader(const GrFragmentProcessor& owner, SkString rawName);
+    GrShaderVar liftUniformToVertexShader(const GrProcessor& owner, SkString rawName);
 
 protected:
     explicit GrGLSLUniformHandler(GrGLSLProgramBuilder* program) : fProgramBuilder(program) {}
@@ -118,7 +119,7 @@ private:
         return {};
     }
 
-    virtual UniformHandle internalAddUniformArray(const GrFragmentProcessor* owner,
+    virtual UniformHandle internalAddUniformArray(const GrProcessor* owner,
                                                   uint32_t visibility,
                                                   SkSLType type,
                                                   const char* name,

src/gpu/mtl/GrMtlUniformHandler.h

@@ -62,7 +62,7 @@ private:
         , fCurrentUBOMaxAlignment(0x0) {
     }
 
-    UniformHandle internalAddUniformArray(const GrFragmentProcessor* owner,
+    UniformHandle internalAddUniformArray(const GrProcessor* owner,
                                           uint32_t visibility,
                                           SkSLType type,
                                           const char* name,

src/gpu/mtl/GrMtlUniformHandler.mm

@@ -178,7 +178,7 @@ static uint32_t get_ubo_aligned_offset(uint32_t* currentOffset,
 }
 
 GrGLSLUniformHandler::UniformHandle GrMtlUniformHandler::internalAddUniformArray(
-                                                                   const GrFragmentProcessor* owner,
+                                                                   const GrProcessor* owner,
                                                                    uint32_t visibility,
                                                                    SkSLType type,
                                                                    const char* name,

src/gpu/vk/GrVkUniformHandler.cpp

@@ -198,7 +198,7 @@ GrVkUniformHandler::~GrVkUniformHandler() {
 }
 
 GrGLSLUniformHandler::UniformHandle GrVkUniformHandler::internalAddUniformArray(
-                                                                   const GrFragmentProcessor* owner,
+                                                                   const GrProcessor* owner,
                                                                    uint32_t visibility,
                                                                    SkSLType type,
                                                                    const char* name,

src/gpu/vk/GrVkUniformHandler.h

@@ -102,7 +102,7 @@ private:
         , fCurrentOffsets{0, 0} {
     }
 
-    UniformHandle internalAddUniformArray(const GrFragmentProcessor* owner,
+    UniformHandle internalAddUniformArray(const GrProcessor* owner,
                                           uint32_t visibility,
                                           SkSLType type,
                                           const char* name,