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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrContext.h"
#include "GrCaps.h"
#include "GrGpu.h"
#include "GrResourceKey.h"
#include "GrRenderTarget.h"
#include "GrRenderTargetPriv.h"
#include "GrTexture.h"
#include "GrTexturePriv.h"
#include "GrTypes.h"
#include "SkMath.h"
#include "SkMipMap.h"
#include "SkTypes.h"
void GrTexture::dirtyMipMaps(bool mipMapsDirty) {
if (mipMapsDirty) {
if (kValid_MipMapsStatus == fMipMapsStatus) {
fMipMapsStatus = kAllocated_MipMapsStatus;
}
} else {
const bool sizeChanged = kNotAllocated_MipMapsStatus == fMipMapsStatus;
fMipMapsStatus = kValid_MipMapsStatus;
if (sizeChanged) {
// This must not be called until after changing fMipMapsStatus.
this->didChangeGpuMemorySize();
// TODO(http://skbug.com/4548) - The desc and scratch key should be
// updated to reflect the newly-allocated mipmaps.
}
}
}
size_t GrTexture::ComputeSize(const GrSurfaceDesc& desc, bool hasMipMaps) {
size_t textureSize;
if (GrPixelConfigIsCompressed(desc.fConfig)) {
textureSize = GrCompressedFormatDataSize(desc.fConfig, desc.fWidth, desc.fHeight);
} else {
textureSize = (size_t) desc.fWidth * desc.fHeight * GrBytesPerPixel(desc.fConfig);
}
if (hasMipMaps) {
// We don't have to worry about the mipmaps being a different size than
// we'd expect because we never change fDesc.fWidth/fHeight.
textureSize += textureSize/3;
}
SkASSERT(!SkToBool(desc.fFlags & kRenderTarget_GrSurfaceFlag));
SkASSERT(textureSize <= WorstCaseSize(desc));
return textureSize;
}
size_t GrTexture::onGpuMemorySize() const {
return ComputeSize(fDesc, this->texturePriv().hasMipMaps());
}
void GrTexture::validateDesc() const {
if (this->asRenderTarget()) {
// This texture has a render target
SkASSERT(0 != (fDesc.fFlags & kRenderTarget_GrSurfaceFlag));
SkASSERT(fDesc.fSampleCnt == this->asRenderTarget()->numColorSamples());
} else {
SkASSERT(0 == (fDesc.fFlags & kRenderTarget_GrSurfaceFlag));
SkASSERT(0 == fDesc.fSampleCnt);
}
}
//////////////////////////////////////////////////////////////////////////////
namespace {
// FIXME: This should be refactored with the code in gl/GrGLGpu.cpp.
GrSurfaceOrigin resolve_origin(const GrSurfaceDesc& desc) {
// By default, GrRenderTargets are GL's normal orientation so that they
// can be drawn to by the outside world without the client having
// to render upside down.
bool renderTarget = 0 != (desc.fFlags & kRenderTarget_GrSurfaceFlag);
if (kDefault_GrSurfaceOrigin == desc.fOrigin) {
return renderTarget ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
} else {
return desc.fOrigin;
}
}
}
//////////////////////////////////////////////////////////////////////////////
GrTexture::GrTexture(GrGpu* gpu, const GrSurfaceDesc& desc, GrSLType samplerType,
bool wasMipMapDataProvided)
: INHERITED(gpu, desc)
, fSamplerType(samplerType)
// Gamma treatment is explicitly set after creation via GrTexturePriv
, fGammaTreatment(SkSourceGammaTreatment::kIgnore) {
if (wasMipMapDataProvided) {
fMipMapsStatus = kValid_MipMapsStatus;
fMaxMipMapLevel = SkMipMap::ComputeLevelCount(fDesc.fWidth, fDesc.fHeight);
} else {
fMipMapsStatus = kNotAllocated_MipMapsStatus;
fMaxMipMapLevel = 0;
}
}
void GrTexture::computeScratchKey(GrScratchKey* key) const {
if (!GrPixelConfigIsCompressed(fDesc.fConfig)) {
GrTexturePriv::ComputeScratchKey(fDesc, key);
}
}
void GrTexturePriv::ComputeScratchKey(const GrSurfaceDesc& desc, GrScratchKey* key) {
static const GrScratchKey::ResourceType kType = GrScratchKey::GenerateResourceType();
GrSurfaceOrigin origin = resolve_origin(desc);
uint32_t flags = desc.fFlags & ~kCheckAllocation_GrSurfaceFlag;
// make sure desc.fConfig fits in 5 bits
SkASSERT(sk_float_log2(kLast_GrPixelConfig) <= 5);
SkASSERT(static_cast<int>(desc.fConfig) < (1 << 5));
SkASSERT(desc.fSampleCnt < (1 << 8));
SkASSERT(flags < (1 << 10));
SkASSERT(static_cast<int>(origin) < (1 << 8));
GrScratchKey::Builder builder(key, kType, 3);
builder[0] = desc.fWidth;
builder[1] = desc.fHeight;
builder[2] = desc.fConfig | (desc.fIsMipMapped << 5) | (desc.fSampleCnt << 6) | (flags << 14)
| (origin << 24);
}
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