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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 "SkDevice.h"
#include "SkMetaData.h"
#if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
const SkCanvas::Config8888 SkBaseDevice::kPMColorAlias = SkCanvas::kBGRA_Premul_Config8888;
#elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
const SkCanvas::Config8888 SkBaseDevice::kPMColorAlias = SkCanvas::kRGBA_Premul_Config8888;
#else
const SkCanvas::Config8888 SkBaseDevice::kPMColorAlias = (SkCanvas::Config8888) -1;
#endif
///////////////////////////////////////////////////////////////////////////////
SkBaseDevice::SkBaseDevice()
: fLeakyProperties(SkDeviceProperties::MakeDefault())
#ifdef SK_DEBUG
, fAttachedToCanvas(false)
#endif
{
fOrigin.setZero();
fMetaData = NULL;
}
SkBaseDevice::SkBaseDevice(const SkDeviceProperties& deviceProperties)
: fLeakyProperties(deviceProperties)
#ifdef SK_DEBUG
, fAttachedToCanvas(false)
#endif
{
fOrigin.setZero();
fMetaData = NULL;
}
SkBaseDevice::~SkBaseDevice() {
delete fMetaData;
}
SkBaseDevice* SkBaseDevice::createCompatibleDevice(const SkImageInfo& info) {
#ifdef SK_SUPPORT_LEGACY_COMPATIBLEDEVICE_CONFIG
// We call the old method to support older subclasses.
// If they have, we return their device, else we use the new impl.
SkBitmap::Config config = SkColorTypeToBitmapConfig(info.colorType());
SkBaseDevice* dev = this->onCreateCompatibleDevice(config,
info.width(),
info.height(),
info.isOpaque(),
kGeneral_Usage);
if (dev) {
return dev;
}
// fall through to new impl
#endif
return this->onCreateDevice(info, kGeneral_Usage);
}
SkBaseDevice* SkBaseDevice::createCompatibleDeviceForSaveLayer(const SkImageInfo& info) {
#ifdef SK_SUPPORT_LEGACY_COMPATIBLEDEVICE_CONFIG
// We call the old method to support older subclasses.
// If they have, we return their device, else we use the new impl.
SkBitmap::Config config = SkColorTypeToBitmapConfig(info.colorType());
SkBaseDevice* dev = this->onCreateCompatibleDevice(config,
info.width(),
info.height(),
info.isOpaque(),
kSaveLayer_Usage);
if (dev) {
return dev;
}
// fall through to new impl
#endif
return this->onCreateDevice(info, kSaveLayer_Usage);
}
#ifdef SK_SUPPORT_LEGACY_COMPATIBLEDEVICE_CONFIG
SkBaseDevice* SkBaseDevice::createCompatibleDevice(SkBitmap::Config config,
int width, int height,
bool isOpaque) {
SkImageInfo info = SkImageInfo::Make(width, height,
SkBitmapConfigToColorType(config),
isOpaque ? kOpaque_SkAlphaType
: kPremul_SkAlphaType);
return this->createCompatibleDevice(info);
}
#endif
SkMetaData& SkBaseDevice::getMetaData() {
// metadata users are rare, so we lazily allocate it. If that changes we
// can decide to just make it a field in the device (rather than a ptr)
if (NULL == fMetaData) {
fMetaData = new SkMetaData;
}
return *fMetaData;
}
// TODO: should make this guy pure-virtual.
SkImageInfo SkBaseDevice::imageInfo() const {
return SkImageInfo::Make(this->width(), this->height(),
kUnknown_SkColorType, kIgnore_SkAlphaType);
}
const SkBitmap& SkBaseDevice::accessBitmap(bool changePixels) {
const SkBitmap& bitmap = this->onAccessBitmap();
if (changePixels) {
bitmap.notifyPixelsChanged();
}
return bitmap;
}
bool SkBaseDevice::readPixels(SkBitmap* bitmap, int x, int y,
SkCanvas::Config8888 config8888) {
if (SkBitmap::kARGB_8888_Config != bitmap->config() ||
NULL != bitmap->getTexture()) {
return false;
}
const SkBitmap& src = this->accessBitmap(false);
SkIRect srcRect = SkIRect::MakeXYWH(x, y, bitmap->width(),
bitmap->height());
SkIRect devbounds = SkIRect::MakeWH(src.width(), src.height());
if (!srcRect.intersect(devbounds)) {
return false;
}
SkBitmap tmp;
SkBitmap* bmp;
if (bitmap->isNull()) {
if (!tmp.allocPixels(SkImageInfo::MakeN32Premul(bitmap->width(),
bitmap->height()))) {
return false;
}
bmp = &tmp;
} else {
bmp = bitmap;
}
SkIRect subrect = srcRect;
subrect.offset(-x, -y);
SkBitmap bmpSubset;
bmp->extractSubset(&bmpSubset, subrect);
bool result = this->onReadPixels(bmpSubset,
srcRect.fLeft,
srcRect.fTop,
config8888);
if (result && bmp == &tmp) {
tmp.swap(*bitmap);
}
return result;
}
SkSurface* SkBaseDevice::newSurface(const SkImageInfo&) { return NULL; }
const void* SkBaseDevice::peekPixels(SkImageInfo*, size_t*) { return NULL; }
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