Enable initial sRGB support

Instead of using the sampler field force_degamma to perform sRGB->linear conversion during pixel sampling, we use an appropriate image format instead. The overhead of this is having to create an image view when creating a texture object from an array.

Change-Id: I1ca368c312c1fd4b6f784a3a1b35b5eeb28070ff

vdi/hip_conversions.hpp

@@ -76,14 +76,17 @@ cl_channel_type getCLChannelType(const hipArray_Format hipFormat,
 }
 
 inline
-cl_channel_order getCLChannelOrder(const unsigned int hipNumChannels) {
+cl_channel_order getCLChannelOrder(const unsigned int hipNumChannels,
+                                   const int sRGB) {
   switch (hipNumChannels) {
     case 1:
       return CL_R;
     case 2:
       return CL_RG;
     case 4:
-      return CL_RGBA;
+      return (sRGB == 1) ? CL_sRGBA : CL_RGBA;
+    default:
+      break;
   }
 
   ShouldNotReachHere();

vdi/hip_memory.cpp

@@ -545,7 +545,7 @@ hipError_t ihipArrayCreate(hipArray** array,
     return hipErrorNotSupported;
   }
 
-  const cl_channel_order channelOrder = hip::getCLChannelOrder(pAllocateArray->NumChannels);
+  const cl_channel_order channelOrder = hip::getCLChannelOrder(pAllocateArray->NumChannels, 0);
   const cl_channel_type channelType = hip::getCLChannelType(pAllocateArray->Format, hipReadModeElementType);
   const cl_mem_object_type imageType = hip::getCLMemObjectType(pAllocateArray->Width,
                                                                pAllocateArray->Height,

vdi/hip_texture.cpp

@@ -130,10 +130,6 @@ hipError_t ihipCreateTextureObject(hipTextureObject_t* pTexObject,
   if (pTexDesc->addressMode[0] == hipAddressModeBorder) {
     return hipErrorNotSupported;
   }
-  // We don't program the force_degamma/skip_degamma fields in the HW sampler SRD.
-  if (pTexDesc->sRGB == 1) {
-    return hipErrorNotSupported;
-  }
   // We don't program the max_ansio_ratio field in the the HW sampler SRD.
   if (pTexDesc->maxAnisotropy != 0) {
     return hipErrorNotSupported;
@@ -221,10 +217,11 @@ hipError_t ihipCreateTextureObject(hipTextureObject_t* pTexObject,
     // We need to create an image view if the user requested to use normalized pixel values,
     // due to already having the image created with a different format.
     if ((pResViewDesc != nullptr) ||
-        (readMode == hipReadModeNormalizedFloat)) {
+        (readMode == hipReadModeNormalizedFloat) ||
+        (pTexDesc->sRGB == 1)) {
       // TODO VDI currently right now can only change the format of the image.
-      const cl_channel_order channelOrder = (pResViewDesc != nullptr) ? hip::getCLChannelOrder(hip::getNumChannels(pResViewDesc->format)) :
-                                                                        hip::getCLChannelOrder(pResDesc->res.array.array->NumChannels);
+      const cl_channel_order channelOrder = (pResViewDesc != nullptr) ? hip::getCLChannelOrder(hip::getNumChannels(pResViewDesc->format), pTexDesc->sRGB) :
+                                                                        hip::getCLChannelOrder(pResDesc->res.array.array->NumChannels, pTexDesc->sRGB);
       const cl_channel_type channelType = (pResViewDesc != nullptr) ? hip::getCLChannelType(hip::getArrayFormat(pResViewDesc->format), readMode) :
                                                                       hip::getCLChannelType(pResDesc->res.array.array->Format, readMode);
       const amd::Image::Format imageFormat(cl_image_format{channelOrder, channelType});
@@ -244,7 +241,7 @@ hipError_t ihipCreateTextureObject(hipTextureObject_t* pTexObject,
     break;
   }
   case hipResourceTypeLinear: {
-    const cl_channel_order channelOrder = hip::getCLChannelOrder(hip::getNumChannels(pResDesc->res.linear.desc));
+    const cl_channel_order channelOrder = hip::getCLChannelOrder(hip::getNumChannels(pResDesc->res.linear.desc), pTexDesc->sRGB);
     const cl_channel_type channelType = hip::getCLChannelType(hip::getArrayFormat(pResDesc->res.linear.desc), pTexDesc->readMode);
     const amd::Image::Format imageFormat({channelOrder, channelType});
     const cl_mem_object_type imageType = hip::getCLMemObjectType(pResDesc->resType);
@@ -268,7 +265,7 @@ hipError_t ihipCreateTextureObject(hipTextureObject_t* pTexObject,
     break;
   }
   case hipResourceTypePitch2D: {
-    const cl_channel_order channelOrder = hip::getCLChannelOrder(hip::getNumChannels(pResDesc->res.pitch2D.desc));
+    const cl_channel_order channelOrder = hip::getCLChannelOrder(hip::getNumChannels(pResDesc->res.pitch2D.desc), pTexDesc->sRGB);
     const cl_channel_type channelType = hip::getCLChannelType(hip::getArrayFormat(pResDesc->res.pitch2D.desc), pTexDesc->readMode);
     const cl_mem_object_type imageType = hip::getCLMemObjectType(pResDesc->resType);
     size_t offset = 0;