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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrMtlUtil.h"
#include "GrTypesPriv.h"
bool GrPixelConfigToMTLFormat(GrPixelConfig config, MTLPixelFormat* format) {
MTLPixelFormat dontCare;
if (!format) {
format = &dontCare;
}
switch (config) {
case kUnknown_GrPixelConfig:
return false;
case kRGBA_8888_GrPixelConfig:
*format = MTLPixelFormatRGBA8Unorm;
return true;
case kBGRA_8888_GrPixelConfig:
*format = MTLPixelFormatBGRA8Unorm;
return true;
case kSRGBA_8888_GrPixelConfig:
*format = MTLPixelFormatRGBA8Unorm_sRGB;
return true;
case kSBGRA_8888_GrPixelConfig:
*format = MTLPixelFormatBGRA8Unorm_sRGB;
return true;
case kRGB_565_GrPixelConfig:
#ifdef SK_BUILD_FOR_IOS
*format = MTLPixelFormatR5G6B5Unorm;
return true;
#else
return false;
#endif
case kRGBA_4444_GrPixelConfig:
#ifdef SK_BUILD_FOR_IOS
*format = MTLPixelFormatABGR4Unorm;
return true;
#else
return false;
#endif
case kAlpha_8_GrPixelConfig: // fall through
case kAlpha_8_as_Red_GrPixelConfig:
*format = MTLPixelFormatR8Unorm;
return true;
case kAlpha_8_as_Alpha_GrPixelConfig:
return false;
case kGray_8_GrPixelConfig: // fall through
case kGray_8_as_Red_GrPixelConfig:
*format = MTLPixelFormatR8Unorm;
return true;
case kGray_8_as_Lum_GrPixelConfig:
return false;
case kRGBA_float_GrPixelConfig:
*format = MTLPixelFormatRGBA32Float;
return true;
case kRG_float_GrPixelConfig:
*format = MTLPixelFormatRG32Float;
return true;
case kRGBA_half_GrPixelConfig:
*format = MTLPixelFormatRGBA16Float;
return true;
case kAlpha_half_GrPixelConfig: // fall through
case kAlpha_half_as_Red_GrPixelConfig:
*format = MTLPixelFormatR16Float;
return true;
}
SK_ABORT("Unexpected config");
return false;
}
GrPixelConfig GrMTLFormatToPixelConfig(MTLPixelFormat format) {
switch (format) {
case MTLPixelFormatRGBA8Unorm:
return kRGBA_8888_GrPixelConfig;
case MTLPixelFormatBGRA8Unorm:
return kBGRA_8888_GrPixelConfig;
case MTLPixelFormatRGBA8Unorm_sRGB:
return kSRGBA_8888_GrPixelConfig;
case MTLPixelFormatBGRA8Unorm_sRGB:
return kSBGRA_8888_GrPixelConfig;
#ifdef SK_BUILD_FOR_IOS
case MTLPixelFormatB5G6R5Unorm:
return kRGB_565_GrPixelConfig;
case MTLPixelFormatABGR4Unorm:
return kRGBA_4444_GrPixelConfig;
#endif
case MTLPixelFormatR8Unorm:
// We currently set this to be Alpha_8 and have no way to go to Gray_8
return kAlpha_8_GrPixelConfig;
case MTLPixelFormatRGBA32Float:
return kRGBA_float_GrPixelConfig;
case MTLPixelFormatRG32Float:
return kRG_float_GrPixelConfig;
case MTLPixelFormatRGBA16Float:
return kRGBA_half_GrPixelConfig;
case MTLPixelFormatR16Float:
return kAlpha_half_GrPixelConfig;
default:
return kUnknown_GrPixelConfig;
}
}
bool GrMTLFormatIsSRGB(MTLPixelFormat format, MTLPixelFormat* linearFormat) {
MTLPixelFormat linearFmt = format;
switch (format) {
case MTLPixelFormatRGBA8Unorm_sRGB:
linearFmt = MTLPixelFormatRGBA8Unorm;
break;
case MTLPixelFormatBGRA8Unorm_sRGB:
linearFmt = MTLPixelFormatBGRA8Unorm;
break;
default:
break;
}
if (linearFormat) {
*linearFormat = linearFmt;
}
return (linearFmt != format);
}
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