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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkImageGenerator.h"
#include "SkNextID.h"
SkImageGenerator::SkImageGenerator(const SkImageInfo& info)
: fInfo(info)
, fUniqueID(SkNextID::ImageID())
{}
bool SkImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
SkPMColor ctable[], int* ctableCount) {
if (kUnknown_SkColorType == info.colorType()) {
return false;
}
if (NULL == pixels) {
return false;
}
if (rowBytes < info.minRowBytes()) {
return false;
}
if (kIndex_8_SkColorType == info.colorType()) {
if (NULL == ctable || NULL == ctableCount) {
return false;
}
} else {
if (ctableCount) {
*ctableCount = 0;
}
ctableCount = NULL;
ctable = NULL;
}
const bool success = this->onGetPixels(info, pixels, rowBytes, ctable, ctableCount);
if (success && ctableCount) {
SkASSERT(*ctableCount >= 0 && *ctableCount <= 256);
}
return success;
}
bool SkImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes) {
SkASSERT(kIndex_8_SkColorType != info.colorType());
if (kIndex_8_SkColorType == info.colorType()) {
return false;
}
return this->getPixels(info, pixels, rowBytes, NULL, NULL);
}
bool SkImageGenerator::getYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
SkYUVColorSpace* colorSpace) {
#ifdef SK_DEBUG
// In all cases, we need the sizes array
SkASSERT(sizes);
bool isValidWithPlanes = (planes) && (rowBytes) &&
((planes[0]) && (planes[1]) && (planes[2]) &&
(0 != rowBytes[0]) && (0 != rowBytes[1]) && (0 != rowBytes[2]));
bool isValidWithoutPlanes =
((NULL == planes) ||
((NULL == planes[0]) && (NULL == planes[1]) && (NULL == planes[2]))) &&
((NULL == rowBytes) ||
((0 == rowBytes[0]) && (0 == rowBytes[1]) && (0 == rowBytes[2])));
// Either we have all planes and rowBytes information or we have none of it
// Having only partial information is not supported
SkASSERT(isValidWithPlanes || isValidWithoutPlanes);
// If we do have planes information, make sure all sizes are non 0
// and all rowBytes are valid
SkASSERT(!isValidWithPlanes ||
((sizes[0].fWidth >= 0) &&
(sizes[0].fHeight >= 0) &&
(sizes[1].fWidth >= 0) &&
(sizes[1].fHeight >= 0) &&
(sizes[2].fWidth >= 0) &&
(sizes[2].fHeight >= 0) &&
(rowBytes[0] >= (size_t)sizes[0].fWidth) &&
(rowBytes[1] >= (size_t)sizes[1].fWidth) &&
(rowBytes[2] >= (size_t)sizes[2].fWidth)));
#endif
return this->onGetYUV8Planes(sizes, planes, rowBytes, colorSpace);
}
bool SkImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3]) {
return false;
}
bool SkImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
SkYUVColorSpace* colorSpace) {
// In order to maintain compatibility with clients that implemented the original
// onGetYUV8Planes interface, we assume that the color space is JPEG.
// TODO(rileya): remove this and the old onGetYUV8Planes once clients switch over to
// the new interface.
if (colorSpace) {
*colorSpace = kJPEG_SkYUVColorSpace;
}
return this->onGetYUV8Planes(sizes, planes, rowBytes);
}
GrTexture* SkImageGenerator::generateTexture(GrContext* ctx, SkImageUsageType usage) {
if (!ctx) {
return nullptr;
}
return this->onGenerateTexture(ctx, usage);
}
/////////////////////////////////////////////////////////////////////////////////////////////
SkData* SkImageGenerator::onRefEncodedData() {
return NULL;
}
bool SkImageGenerator::onGetPixels(const SkImageInfo& info, void* dst, size_t rb,
SkPMColor* colors, int* colorCount) {
return false;
}
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkGraphics.h"
static SkGraphics::ImageGeneratorFromEncodedFactory gFactory;
SkGraphics::ImageGeneratorFromEncodedFactory
SkGraphics::SetImageGeneratorFromEncodedFactory(ImageGeneratorFromEncodedFactory factory)
{
ImageGeneratorFromEncodedFactory prev = gFactory;
gFactory = factory;
return prev;
}
SkImageGenerator* SkImageGenerator::NewFromEncoded(SkData* data) {
if (NULL == data) {
return NULL;
}
if (gFactory) {
if (SkImageGenerator* generator = gFactory(data)) {
return generator;
}
}
return SkImageGenerator::NewFromEncodedImpl(data);
}
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