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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrSurface.h"
#include "GrContext.h"
#include "GrOpList.h"
#include "GrRenderTarget.h"
#include "GrResourceProvider.h"
#include "GrSurfacePriv.h"
#include "GrTexture.h"
#include "SkGr.h"
#include "SkMathPriv.h"
size_t GrSurface::WorstCaseSize(const GrSurfaceDesc& desc, bool useNextPow2) {
size_t size;
int width = useNextPow2
? SkTMax(GrResourceProvider::kMinScratchTextureSize, GrNextPow2(desc.fWidth))
: desc.fWidth;
int height = useNextPow2
? SkTMax(GrResourceProvider::kMinScratchTextureSize, GrNextPow2(desc.fHeight))
: desc.fHeight;
bool isRenderTarget = SkToBool(desc.fFlags & kRenderTarget_GrSurfaceFlag);
if (isRenderTarget) {
// We own one color value for each MSAA sample.
int colorValuesPerPixel = SkTMax(1, desc.fSampleCnt);
if (desc.fSampleCnt) {
// Worse case, we own the resolve buffer so that is one more sample per pixel.
colorValuesPerPixel += 1;
}
SkASSERT(kUnknown_GrPixelConfig != desc.fConfig);
size_t colorBytes = (size_t) width * height * GrBytesPerPixel(desc.fConfig);
// This would be a nice assert to have (i.e., we aren't creating 0 width/height surfaces).
// Unfortunately Chromium seems to want to do this.
//SkASSERT(colorBytes > 0);
size = colorValuesPerPixel * colorBytes;
size += colorBytes/3; // in case we have to mipmap
} else {
size = (size_t) width * height * GrBytesPerPixel(desc.fConfig);
size += size/3; // in case we have to mipmap
}
return size;
}
size_t GrSurface::ComputeSize(GrPixelConfig config,
int width,
int height,
int colorSamplesPerPixel,
GrMipMapped mipMapped,
bool useNextPow2) {
width = useNextPow2
? SkTMax(GrResourceProvider::kMinScratchTextureSize, GrNextPow2(width))
: width;
height = useNextPow2
? SkTMax(GrResourceProvider::kMinScratchTextureSize, GrNextPow2(height))
: height;
SkASSERT(kUnknown_GrPixelConfig != config);
size_t colorSize = (size_t)width * height * GrBytesPerPixel(config);
SkASSERT(colorSize > 0);
size_t finalSize = colorSamplesPerPixel * colorSize;
if (GrMipMapped::kYes == mipMapped) {
// We don't have to worry about the mipmaps being a different size than
// we'd expect because we never change fDesc.fWidth/fHeight.
finalSize += colorSize/3;
}
return finalSize;
}
template<typename T> static bool adjust_params(int surfaceWidth,
int surfaceHeight,
size_t bpp,
int* left, int* top, int* width, int* height,
T** data,
size_t* rowBytes) {
if (!*rowBytes) {
*rowBytes = *width * bpp;
}
SkIRect subRect = SkIRect::MakeXYWH(*left, *top, *width, *height);
SkIRect bounds = SkIRect::MakeWH(surfaceWidth, surfaceHeight);
if (!subRect.intersect(bounds)) {
return false;
}
*data = reinterpret_cast<void*>(reinterpret_cast<intptr_t>(*data) +
(subRect.fTop - *top) * *rowBytes + (subRect.fLeft - *left) * bpp);
*left = subRect.fLeft;
*top = subRect.fTop;
*width = subRect.width();
*height = subRect.height();
return true;
}
bool GrSurfacePriv::AdjustReadPixelParams(int surfaceWidth,
int surfaceHeight,
size_t bpp,
int* left, int* top, int* width, int* height,
void** data,
size_t* rowBytes) {
return adjust_params<void>(surfaceWidth, surfaceHeight, bpp, left, top, width, height, data,
rowBytes);
}
bool GrSurfacePriv::AdjustWritePixelParams(int surfaceWidth,
int surfaceHeight,
size_t bpp,
int* left, int* top, int* width, int* height,
const void** data,
size_t* rowBytes) {
return adjust_params<const void>(surfaceWidth, surfaceHeight, bpp, left, top, width, height,
data, rowBytes);
}
//////////////////////////////////////////////////////////////////////////////
bool GrSurface::hasPendingRead() const {
const GrTexture* thisTex = this->asTexture();
if (thisTex && thisTex->internalHasPendingRead()) {
return true;
}
const GrRenderTarget* thisRT = this->asRenderTarget();
if (thisRT && thisRT->internalHasPendingRead()) {
return true;
}
return false;
}
bool GrSurface::hasPendingWrite() const {
const GrTexture* thisTex = this->asTexture();
if (thisTex && thisTex->internalHasPendingWrite()) {
return true;
}
const GrRenderTarget* thisRT = this->asRenderTarget();
if (thisRT && thisRT->internalHasPendingWrite()) {
return true;
}
return false;
}
bool GrSurface::hasPendingIO() const {
const GrTexture* thisTex = this->asTexture();
if (thisTex && thisTex->internalHasPendingIO()) {
return true;
}
const GrRenderTarget* thisRT = this->asRenderTarget();
if (thisRT && thisRT->internalHasPendingIO()) {
return true;
}
return false;
}
void GrSurface::onRelease() {
this->INHERITED::onRelease();
}
void GrSurface::onAbandon() {
this->INHERITED::onAbandon();
}
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