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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 "GrDrawTargetCaps.h"
#include "GrGpu.h"
#include "GrTexture.h"
#include "GrTexturePriv.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();
}
}
}
size_t GrTexture::onGpuMemorySize() const {
size_t textureSize;
if (GrPixelConfigIsCompressed(fDesc.fConfig)) {
textureSize = GrCompressedFormatDataSize(fDesc.fConfig, fDesc.fWidth, fDesc.fHeight);
} else {
textureSize = (size_t) fDesc.fWidth * fDesc.fHeight * GrBytesPerPixel(fDesc.fConfig);
}
if (this->texturePriv().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 *= 2;
}
return textureSize;
}
void GrTexture::validateDesc() const {
if (this->asRenderTarget()) {
// This texture has a render target
SkASSERT(0 != (fDesc.fFlags & kRenderTarget_GrSurfaceFlag));
if (this->asRenderTarget()->getStencilBuffer()) {
SkASSERT(0 != (fDesc.fFlags & kNoStencil_GrSurfaceFlag));
} else {
SkASSERT(0 == (fDesc.fFlags & kNoStencil_GrSurfaceFlag));
}
SkASSERT(fDesc.fSampleCnt == this->asRenderTarget()->numSamples());
} else {
SkASSERT(0 == (fDesc.fFlags & kRenderTarget_GrSurfaceFlag));
SkASSERT(0 == (fDesc.fFlags & kNoStencil_GrSurfaceFlag));
SkASSERT(0 == fDesc.fSampleCnt);
}
}
//////////////////////////////////////////////////////////////////////////////
// These flags need to fit in a GrResourceKey::ResourceFlags so they can be folded into the texture
// key
enum TextureFlags {
/**
* The kStretchToPOT bit is set when the texture is NPOT and is being repeated but the
* hardware doesn't support that feature.
*/
kStretchToPOT_TextureFlag = 0x1,
/**
* The kBilerp bit can only be set when the kStretchToPOT flag is set and indicates whether the
* stretched texture should be bilerped.
*/
kBilerp_TextureFlag = 0x2,
};
namespace {
GrResourceKey::ResourceFlags get_texture_flags(const GrGpu* gpu,
const GrTextureParams* params,
const GrSurfaceDesc& desc) {
GrResourceKey::ResourceFlags flags = 0;
bool tiled = params && params->isTiled();
if (tiled && !gpu->caps()->npotTextureTileSupport()) {
if (!SkIsPow2(desc.fWidth) || !SkIsPow2(desc.fHeight)) {
flags |= kStretchToPOT_TextureFlag;
switch(params->filterMode()) {
case GrTextureParams::kNone_FilterMode:
break;
case GrTextureParams::kBilerp_FilterMode:
case GrTextureParams::kMipMap_FilterMode:
flags |= kBilerp_TextureFlag;
break;
}
}
}
return flags;
}
// FIXME: This should be refactored with the code in gl/GrGpuGL.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, bool isWrapped, const GrSurfaceDesc& desc)
: INHERITED(gpu, isWrapped, desc)
, fMipMapsStatus(kNotAllocated_MipMapsStatus) {
if (!isWrapped) {
this->setScratchKey(GrTexturePriv::ComputeScratchKey(desc));
}
// only make sense if alloc size is pow2
fShiftFixedX = 31 - SkCLZ(fDesc.fWidth);
fShiftFixedY = 31 - SkCLZ(fDesc.fHeight);
}
GrResourceKey GrTexturePriv::ComputeKey(const GrGpu* gpu,
const GrTextureParams* params,
const GrSurfaceDesc& desc,
const GrCacheID& cacheID) {
GrResourceKey::ResourceFlags flags = get_texture_flags(gpu, params, desc);
return GrResourceKey(cacheID, ResourceType(), flags);
}
GrResourceKey GrTexturePriv::ComputeScratchKey(const GrSurfaceDesc& desc) {
GrCacheID::Key idKey;
// Instead of a client-provided key of the texture contents we create a key from the
// descriptor.
GR_STATIC_ASSERT(sizeof(idKey) >= 16);
SkASSERT(desc.fHeight < (1 << 16));
SkASSERT(desc.fWidth < (1 << 16));
idKey.fData32[0] = (desc.fWidth) | (desc.fHeight << 16);
idKey.fData32[1] = desc.fConfig | desc.fSampleCnt << 16;
idKey.fData32[2] = desc.fFlags;
idKey.fData32[3] = resolve_origin(desc); // Only needs 2 bits actually
static const int kPadSize = sizeof(idKey) - 16;
GR_STATIC_ASSERT(kPadSize >= 0);
memset(idKey.fData8 + 16, 0, kPadSize);
GrCacheID cacheID(GrResourceKey::ScratchDomain(), idKey);
return GrResourceKey(cacheID, ResourceType(), 0);
}
bool GrTexturePriv::NeedsResizing(const GrResourceKey& key) {
return SkToBool(key.getResourceFlags() & kStretchToPOT_TextureFlag);
}
bool GrTexturePriv::NeedsBilerp(const GrResourceKey& key) {
return SkToBool(key.getResourceFlags() & kBilerp_TextureFlag);
}
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