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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 "GrSurfacePriv.h"
#include "SkBitmap.h"
#include "SkGrPriv.h"
#include "SkImageEncoder.h"
#include <stdio.h>
size_t GrSurface::WorseCaseSize(const GrSurfaceDesc& desc) {
size_t size;
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);
SkASSERT(!GrPixelConfigIsCompressed(desc.fConfig));
size_t colorBytes = GrBytesPerPixel(desc.fConfig);
SkASSERT(colorBytes > 0);
size = colorValuesPerPixel * desc.fWidth * desc.fHeight * colorBytes;
} else {
if (GrPixelConfigIsCompressed(desc.fConfig)) {
size = GrCompressedFormatDataSize(desc.fConfig, desc.fWidth, desc.fHeight);
} else {
size = (size_t) desc.fWidth * desc.fHeight * GrBytesPerPixel(desc.fConfig);
}
size += size/3; // in case we have to mipmap
}
return size;
}
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::writePixels(int left, int top, int width, int height,
GrPixelConfig config, const void* buffer, size_t rowBytes,
uint32_t pixelOpsFlags) {
// go through context so that all necessary flushing occurs
GrContext* context = this->getContext();
if (nullptr == context) {
return false;
}
return context->writeSurfacePixels(this, left, top, width, height, config, buffer,
rowBytes, pixelOpsFlags);
}
bool GrSurface::readPixels(int left, int top, int width, int height,
GrPixelConfig config, void* buffer, size_t rowBytes,
uint32_t pixelOpsFlags) {
// go through context so that all necessary flushing occurs
GrContext* context = this->getContext();
if (nullptr == context) {
return false;
}
return context->readSurfacePixels(this, left, top, width, height, config, buffer,
rowBytes, pixelOpsFlags);
}
SkImageInfo GrSurface::info(SkAlphaType alphaType) const {
SkColorType colorType;
SkColorProfileType profileType;
if (!GrPixelConfig2ColorAndProfileType(this->config(), &colorType, &profileType)) {
sk_throw();
}
return SkImageInfo::Make(this->width(), this->height(), colorType, alphaType,
profileType);
}
// TODO: This should probably be a non-member helper function. It might only be needed in
// debug or developer builds.
bool GrSurface::savePixels(const char* filename) {
SkBitmap bm;
if (!bm.tryAllocPixels(SkImageInfo::MakeN32Premul(this->width(), this->height()))) {
return false;
}
bool result = this->readPixels(0, 0, this->width(), this->height(), kSkia8888_GrPixelConfig,
bm.getPixels());
if (!result) {
SkDebugf("------ failed to read pixels for %s\n", filename);
return false;
}
// remove any previous version of this file
remove(filename);
if (!SkImageEncoder::EncodeFile(filename, bm, SkImageEncoder::kPNG_Type, 100)) {
SkDebugf("------ failed to encode %s\n", filename);
remove(filename); // remove any partial file
return false;
}
return true;
}
void GrSurface::flushWrites() {
if (!this->wasDestroyed()) {
this->getContext()->flushSurfaceWrites(this);
}
}
void GrSurface::prepareForExternalIO() {
if (!this->wasDestroyed()) {
this->getContext()->prepareSurfaceForExternalIO(this);
}
}
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->invokeReleaseProc();
this->INHERITED::onRelease();
}
void GrSurface::onAbandon() {
this->invokeReleaseProc();
this->INHERITED::onAbandon();
}
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