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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"
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) {
return this->onCreateDevice(info, kGeneral_Usage);
}
SkBaseDevice* SkBaseDevice::createCompatibleDeviceForSaveLayer(const SkImageInfo& info) {
return this->onCreateDevice(info, kSaveLayer_Usage);
}
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::MakeUnknown(this->width(), this->height());
}
const SkBitmap& SkBaseDevice::accessBitmap(bool changePixels) {
const SkBitmap& bitmap = this->onAccessBitmap();
if (changePixels) {
bitmap.notifyPixelsChanged();
}
return bitmap;
}
SkSurface* SkBaseDevice::newSurface(const SkImageInfo&) { return NULL; }
const void* SkBaseDevice::peekPixels(SkImageInfo*, size_t*) { return NULL; }
void SkBaseDevice::drawDRRect(const SkDraw& draw, const SkRRect& outer,
const SkRRect& inner, const SkPaint& paint) {
SkPath path;
path.addRRect(outer);
path.addRRect(inner);
path.setFillType(SkPath::kEvenOdd_FillType);
const SkMatrix* preMatrix = NULL;
const bool pathIsMutable = true;
this->drawPath(draw, path, paint, preMatrix, pathIsMutable);
}
bool SkBaseDevice::readPixels(const SkImageInfo& info, void* dstP, size_t rowBytes, int x, int y) {
#ifdef SK_DEBUG
SkASSERT(info.width() > 0 && info.height() > 0);
SkASSERT(dstP);
SkASSERT(rowBytes >= info.minRowBytes());
SkASSERT(x >= 0 && y >= 0);
const SkImageInfo& srcInfo = this->imageInfo();
SkASSERT(x + info.width() <= srcInfo.width());
SkASSERT(y + info.height() <= srcInfo.height());
#endif
return this->onReadPixels(info, dstP, rowBytes, x, y);
}
bool SkBaseDevice::writePixels(const SkImageInfo& info, const void* pixels, size_t rowBytes,
int x, int y) {
#ifdef SK_DEBUG
SkASSERT(info.width() > 0 && info.height() > 0);
SkASSERT(pixels);
SkASSERT(rowBytes >= info.minRowBytes());
SkASSERT(x >= 0 && y >= 0);
const SkImageInfo& dstInfo = this->imageInfo();
SkASSERT(x + info.width() <= dstInfo.width());
SkASSERT(y + info.height() <= dstInfo.height());
#endif
return this->onWritePixels(info, pixels, rowBytes, x, y);
}
bool SkBaseDevice::onWritePixels(const SkImageInfo&, const void*, size_t, int, int) {
return false;
}
bool SkBaseDevice::onReadPixels(const SkImageInfo&, void*, size_t, int x, int y) {
return false;
}
void* SkBaseDevice::accessPixels(SkImageInfo* info, size_t* rowBytes) {
SkImageInfo tmpInfo;
size_t tmpRowBytes;
if (NULL == info) {
info = &tmpInfo;
}
if (NULL == rowBytes) {
rowBytes = &tmpRowBytes;
}
return this->onAccessPixels(info, rowBytes);
}
void* SkBaseDevice::onAccessPixels(SkImageInfo* info, size_t* rowBytes) {
return NULL;
}
void SkBaseDevice::EXPERIMENTAL_optimize(SkPicture* picture) {
// The base class doesn't perform any analysis but derived classes may
}
bool SkBaseDevice::EXPERIMENTAL_drawPicture(SkPicture* picture) {
// The base class doesn't perform any accelerated picture rendering
return false;
}
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