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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 "GrMtlTexture.h"
#include "GrMtlGpu.h"
#include "GrMtlUtil.h"
#include "GrTexturePriv.h"
sk_sp<GrMtlTexture> GrMtlTexture::CreateNewTexture(GrMtlGpu* gpu, SkBudgeted budgeted,
const GrSurfaceDesc& desc, int mipLevels) {
MTLPixelFormat format;
if (!GrPixelConfigToMTLFormat(desc.fConfig, &format)) {
return nullptr;
}
MTLTextureDescriptor* descriptor = [[MTLTextureDescriptor alloc] init];
descriptor.textureType = MTLTextureType2D;
descriptor.pixelFormat = format;
descriptor.width = desc.fWidth;
descriptor.height = desc.fHeight;
descriptor.depth = 1;
descriptor.mipmapLevelCount = mipLevels;
descriptor.sampleCount = 1;
descriptor.arrayLength = 1;
// descriptor.resourceOptions This looks to be set by setting cpuCacheMode and storageModes
descriptor.cpuCacheMode = MTLCPUCacheModeWriteCombined;
// Shared is not available on MacOS. Is there a reason to want managed to allow mapping?
descriptor.storageMode = MTLStorageModePrivate;
MTLTextureUsage texUsage = MTLTextureUsageShaderRead;
if (GrMTLFormatIsSRGB(format, nullptr)) {
texUsage |= MTLTextureUsagePixelFormatView;
}
descriptor.usage = texUsage;
id<MTLTexture> texture = [gpu->device() newTextureWithDescriptor:descriptor];
GrMipMapsStatus mipMapsStatus = mipLevels > 1 ? GrMipMapsStatus::kValid
: GrMipMapsStatus::kNotAllocated;
return sk_sp<GrMtlTexture>(new GrMtlTexture(gpu, budgeted, desc, texture, mipMapsStatus));
}
// This method parallels GrTextureProxy::highestFilterMode
static inline GrSamplerState::Filter highest_filter_mode(GrPixelConfig config) {
return GrSamplerState::Filter::kMipMap;
}
GrMtlTexture::GrMtlTexture(GrMtlGpu* gpu,
SkBudgeted budgeted,
const GrSurfaceDesc& desc,
id<MTLTexture> texture,
GrMipMapsStatus mipMapsStatus)
: GrSurface(gpu, desc)
, INHERITED(gpu, desc, kTexture2DSampler_GrSLType, highest_filter_mode(desc.fConfig),
mipMapsStatus)
, fTexture(texture) {
}
GrMtlTexture::~GrMtlTexture() {
SkASSERT(nil == fTexture);
}
GrMtlGpu* GrMtlTexture::getMtlGpu() const {
SkASSERT(!this->wasDestroyed());
return static_cast<GrMtlGpu*>(this->getGpu());
}
GrBackendTexture GrMtlTexture::getBackendTexture() const {
return GrBackendTexture(); // invalid
}
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