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-rw-r--r--src/core/SkCanvas.cpp117
1 files changed, 82 insertions, 35 deletions
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 5a855bb636..0e36c91a4b 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -74,6 +74,9 @@ struct DeviceCM {
const SkMatrix* fMatrix;
SkPaint* fPaint; // may be null (in the future)
int16_t fX, fY; // relative to base matrix/clip
+ // optional, related to canvas' external matrix
+ const SkMatrix* fMVMatrix;
+ const SkMatrix* fExtMatrix;
DeviceCM(SkDevice* device, int x, int y, const SkPaint* paint)
: fNext(NULL) {
@@ -132,8 +135,18 @@ struct DeviceCM {
SkASSERT(deviceR.contains(fClip.getBounds()));
}
#endif
+ // default is to assume no external matrix
+ fMVMatrix = NULL;
+ fExtMatrix = NULL;
}
-
+
+ // can only be called after calling updateMC()
+ void updateExternalMatrix(const SkMatrix& extM, const SkMatrix& extI) {
+ fMVMatrixStorage.setConcat(extI, *fMatrix);
+ fMVMatrix = &fMVMatrixStorage;
+ fExtMatrix = &extM; // assumes extM has long life-time (owned by canvas)
+ }
+
void translateClip() {
if (fX | fY) {
fClip.translate(fX, fY);
@@ -141,7 +154,7 @@ struct DeviceCM {
}
private:
- SkMatrix fMatrixStorage;
+ SkMatrix fMatrixStorage, fMVMatrixStorage;
};
/* This is the record we keep for each save/restore level in the stack.
@@ -240,16 +253,17 @@ public:
fLayerX = rec->fX;
fLayerY = rec->fY;
fPaint = rec->fPaint;
- SkDEBUGCODE(this->validate(fDevice->width(), fDevice->height());)
+ fMVMatrix = rec->fMVMatrix;
+ fExtMatrix = rec->fExtMatrix;
+ SkDEBUGCODE(this->validate();)
fCurrLayer = rec->fNext;
if (fBounder) {
fBounder->setClip(fClip);
}
-
// fCurrLayer may be NULL now
- fCanvas->prepareForDeviceDraw(fDevice);
+ fCanvas->prepareForDeviceDraw(fDevice, *fMatrix, *fClip);
return true;
}
return false;
@@ -401,6 +415,8 @@ SkDevice* SkCanvas::init(SkDevice* device) {
fMCRec->fTopLayer = fMCRec->fLayer;
fMCRec->fNext = NULL;
+ fUseExternalMatrix = false;
+
return this->setDevice(device);
}
@@ -427,7 +443,7 @@ SkCanvas::SkCanvas(const SkBitmap& bitmap)
: fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) {
inc_canvas();
- SkDevice* device = SkNEW_ARGS(SkDevice, (bitmap));
+ SkDevice* device = SkNEW_ARGS(SkDevice, (this, bitmap, false));
fDeviceFactory = device->getDeviceFactory();
this->init(device)->unref();
}
@@ -527,8 +543,8 @@ SkDevice* SkCanvas::setDevice(SkDevice* device) {
return device;
}
-SkDevice* SkCanvas::setBitmapDevice(const SkBitmap& bitmap) {
- SkDevice* device = this->setDevice(SkNEW_ARGS(SkDevice, (bitmap)));
+SkDevice* SkCanvas::setBitmapDevice(const SkBitmap& bitmap, bool forLayer) {
+ SkDevice* device = this->setDevice(SkNEW_ARGS(SkDevice, (this, bitmap, forLayer)));
device->unref();
return device;
}
@@ -546,8 +562,9 @@ bool SkCanvas::getViewport(SkIPoint* size) const {
bool SkCanvas::setViewport(int width, int height) {
if ((getDevice()->getDeviceCapabilities() & SkDevice::kGL_Capability) == 0)
return false;
- this->setDevice(createDevice(SkBitmap::kARGB_8888_Config, width, height,
- false, false))->unref();
+
+ this->setDevice(this->createDevice(SkBitmap::kARGB_8888_Config, width, height,
+ false, false))->unref();
return true;
}
@@ -559,21 +576,30 @@ void SkCanvas::updateDeviceCMCache() {
if (NULL == layer->fNext) { // only one layer
layer->updateMC(totalMatrix, totalClip, NULL);
+ if (fUseExternalMatrix) {
+ layer->updateExternalMatrix(fExternalMatrix,
+ fExternalInverse);
+ }
} else {
SkRegion clip;
clip = totalClip; // make a copy
do {
layer->updateMC(totalMatrix, clip, &clip);
+ if (fUseExternalMatrix) {
+ layer->updateExternalMatrix(fExternalMatrix,
+ fExternalInverse);
+ }
} while ((layer = layer->fNext) != NULL);
}
fDeviceCMDirty = false;
}
}
-void SkCanvas::prepareForDeviceDraw(SkDevice* device) {
+void SkCanvas::prepareForDeviceDraw(SkDevice* device, const SkMatrix& matrix,
+ const SkRegion& clip) {
SkASSERT(device);
if (fLastDeviceToGainFocus != device) {
- device->gainFocus(this);
+ device->gainFocus(this, matrix, clip);
fLastDeviceToGainFocus = device;
}
}
@@ -651,6 +677,9 @@ int SkCanvas::saveLayer(const SkRect* bounds, const SkPaint* paint,
SkIRect ir;
const SkIRect& clipBounds = this->getTotalClip().getBounds();
+ if (clipBounds.isEmpty()) {
+ return count;
+ }
if (NULL != bounds) {
SkRect r;
@@ -760,7 +789,7 @@ static bool reject_bitmap(const SkBitmap& bitmap) {
bitmap.width() > 32767 || bitmap.height() > 32767;
}
-void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap,
+void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap, const SkIRect* srcRect,
const SkMatrix& matrix, const SkPaint* paint) {
if (reject_bitmap(bitmap)) {
return;
@@ -768,9 +797,9 @@ void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap,
if (NULL == paint) {
SkPaint tmpPaint;
- this->commonDrawBitmap(bitmap, matrix, tmpPaint);
+ this->commonDrawBitmap(bitmap, srcRect, matrix, tmpPaint);
} else {
- this->commonDrawBitmap(bitmap, matrix, *paint);
+ this->commonDrawBitmap(bitmap, srcRect, matrix, *paint);
}
}
@@ -1023,13 +1052,30 @@ const SkRegion& SkCanvas::getTotalClip() const {
return *fMCRec->fRegion;
}
-///////////////////////////////////////////////////////////////////////////////
-
-SkDevice* SkCanvas::createDevice(SkBitmap::Config config, int width,
- int height, bool isOpaque, bool isForLayer) {
+void SkCanvas::setExternalMatrix(const SkMatrix* matrix) {
+ if (NULL == matrix || matrix->isIdentity()) {
+ if (fUseExternalMatrix) {
+ fDeviceCMDirty = true;
+ }
+ fUseExternalMatrix = false;
+ } else {
+ fUseExternalMatrix = true;
+ fDeviceCMDirty = true; // |= (fExternalMatrix != *matrix)
+
+ fExternalMatrix = *matrix;
+ matrix->invert(&fExternalInverse);
+ }
+
+ static bool gUseExt;
+ if (gUseExt != fUseExternalMatrix && false) {
+ gUseExt = fUseExternalMatrix;
+ printf("---- fUseExternalMatrix = %d\n", fUseExternalMatrix);
+ }
+}
- return fDeviceFactory->newDevice(config, width, height, isOpaque,
- isForLayer);
+SkDevice* SkCanvas::createDevice(SkBitmap::Config config, int width, int height,
+ bool isOpaque, bool forLayer) {
+ return fDeviceFactory->newDevice(this, config, width, height, isOpaque, forLayer);
}
//////////////////////////////////////////////////////////////////////////////
@@ -1116,7 +1162,7 @@ void SkCanvas::drawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y,
SkMatrix matrix;
matrix.setTranslate(x, y);
- this->internalDrawBitmap(bitmap, matrix, paint);
+ this->internalDrawBitmap(bitmap, NULL, matrix, paint);
}
void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
@@ -1130,15 +1176,7 @@ void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
return;
}
- SkBitmap tmp; // storage if we need a subset of bitmap
const SkBitmap* bitmapPtr = &bitmap;
-
- if (NULL != src) {
- if (!bitmap.extractSubset(&tmp, *src)) {
- return; // extraction failed
- }
- bitmapPtr = &tmp;
- }
SkMatrix matrix;
SkRect tmpSrc;
@@ -1159,23 +1197,32 @@ void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
SkIntToScalar(bitmap.height()));
}
matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);
- this->internalDrawBitmap(*bitmapPtr, matrix, paint);
+
+ // ensure that src is "valid" before we pass it to our internal routines
+ // and to SkDevice. i.e. sure it is contained inside the original bitmap.
+ SkIRect tmpISrc;
+ if (src) {
+ tmpISrc.set(0, 0, bitmap.width(), bitmap.height());
+ tmpISrc.intersect(*src);
+ src = &tmpISrc;
+ }
+ this->internalDrawBitmap(*bitmapPtr, src, matrix, paint);
}
void SkCanvas::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& matrix,
const SkPaint* paint) {
SkDEBUGCODE(bitmap.validate();)
- this->internalDrawBitmap(bitmap, matrix, paint);
+ this->internalDrawBitmap(bitmap, NULL, matrix, paint);
}
-void SkCanvas::commonDrawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix,
- const SkPaint& paint) {
+void SkCanvas::commonDrawBitmap(const SkBitmap& bitmap, const SkIRect* srcRect,
+ const SkMatrix& matrix, const SkPaint& paint) {
SkDEBUGCODE(bitmap.validate();)
ITER_BEGIN(paint, SkDrawFilter::kBitmap_Type)
while (iter.next()) {
- iter.fDevice->drawBitmap(iter, bitmap, matrix, paint);
+ iter.fDevice->drawBitmap(iter, bitmap, srcRect, matrix, paint);
}
ITER_END
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-02 12:35:34 +0000