// Fold the saveLayer's alpha into the drawBitmapRect and remove the saveLayer
// and restore
static void apply_0(SkDebugCanvas* canvas, int curCommand) {
SkSaveLayerCommand* saveLayer =
(SkSaveLayerCommand*) canvas->getDrawCommandAt(curCommand);
const SkPaint* saveLayerPaint = saveLayer->paint();
// if (NULL == saveLayerPaint) the dbmr's paint doesn't need to be changed
if (NULL != saveLayerPaint) {
SkDrawBitmapRectCommand* dbmr =
(SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+1);
SkPaint* dbmrPaint = dbmr->paint();
if (NULL == dbmrPaint) {
// if the DBMR doesn't have a paint just use the saveLayer's
dbmr->setPaint(*saveLayerPaint);
} else if (NULL != saveLayerPaint) {
// Both paints are present so their alphas need to be combined
SkColor color = saveLayerPaint->getColor();
int a0 = SkColorGetA(color);
color = dbmrPaint->getColor();
int a1 = SkColorGetA(color);
int newA = SkMulDiv255Round(a0, a1);
SkASSERT(newA <= 0xFF);
SkColor newColor = SkColorSetA(color, newA);
dbmrPaint->setColor(newColor);
}
}
canvas->deleteDrawCommandAt(curCommand+2); // restore
canvas->deleteDrawCommandAt(curCommand); // saveLayer
}
// Fold the saveLayer's alpha into the drawBitmapRect and remove the saveLayer
// and restore
static void apply_1(SkDebugCanvas* canvas, int curCommand) {
SkSaveLayerCommand* saveLayer =
(SkSaveLayerCommand*) canvas->getDrawCommandAt(curCommand);
const SkPaint* saveLayerPaint = saveLayer->paint();
// if (NULL == saveLayerPaint) the dbmr's paint doesn't need to be changed
if (NULL != saveLayerPaint) {
SkDrawBitmapRectCommand* dbmr =
(SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+3);
SkPaint* dbmrPaint = dbmr->paint();
if (NULL == dbmrPaint) {
dbmr->setPaint(*saveLayerPaint);
} else {
SkColor newColor = SkColorSetA(dbmrPaint->getColor(),
SkColorGetA(saveLayerPaint->getColor()));
dbmrPaint->setColor(newColor);
}
}
canvas->deleteDrawCommandAt(curCommand+5); // restore
canvas->deleteDrawCommandAt(curCommand); // saveLayer
}
// Reduce to a single drawBitmapRectToRect call by folding the clipRect's into
// the src and dst Rects and the saveLayer paints into the drawBitmapRectToRect's
// paint.
static void apply_7(SkDebugCanvas* canvas, int curCommand) {
SkSaveLayerCommand* saveLayer0 =
(SkSaveLayerCommand*) canvas->getDrawCommandAt(curCommand+2);
SkSaveLayerCommand* saveLayer1 =
(SkSaveLayerCommand*) canvas->getDrawCommandAt(curCommand+5);
SkClipRectCommand* clip2 =
(SkClipRectCommand*) canvas->getDrawCommandAt(curCommand+7);
SkDrawBitmapRectCommand* dbmr =
(SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+8);
SkScalar newSrcLeft = dbmr->srcRect()->fLeft + clip2->rect().fLeft - dbmr->dstRect().fLeft;
SkScalar newSrcTop = dbmr->srcRect()->fTop + clip2->rect().fTop - dbmr->dstRect().fTop;
SkRect newSrc = SkRect::MakeXYWH(newSrcLeft, newSrcTop,
clip2->rect().width(), clip2->rect().height());
dbmr->setSrcRect(newSrc);
dbmr->setDstRect(clip2->rect());
SkColor color = 0xFF000000;
int a0, a1;
const SkPaint* saveLayerPaint0 = saveLayer0->paint();
if (NULL != saveLayerPaint0) {
color = saveLayerPaint0->getColor();
a0 = SkColorGetA(color);
} else {
a0 = 0xFF;
}
const SkPaint* saveLayerPaint1 = saveLayer1->paint();
if (NULL != saveLayerPaint1) {
color = saveLayerPaint1->getColor();
a1 = SkColorGetA(color);
} else {
a1 = 0xFF;
}
int newA = SkMulDiv255Round(a0, a1);
SkASSERT(newA <= 0xFF);
SkPaint* dbmrPaint = dbmr->paint();
if (NULL != dbmrPaint) {
SkColor newColor = SkColorSetA(dbmrPaint->getColor(), newA);
dbmrPaint->setColor(newColor);
} else {
SkColor newColor = SkColorSetA(color, newA);
SkPaint newPaint;
newPaint.setColor(newColor);
dbmr->setPaint(newPaint);
}
// remove everything except the drawbitmaprect
canvas->deleteDrawCommandAt(curCommand+13); // restore
canvas->deleteDrawCommandAt(curCommand+12); // restore
canvas->deleteDrawCommandAt(curCommand+11); // restore
canvas->deleteDrawCommandAt(curCommand+10); // restore
canvas->deleteDrawCommandAt(curCommand+9); // restore
canvas->deleteDrawCommandAt(curCommand+7); // clipRect
canvas->deleteDrawCommandAt(curCommand+6); // save
canvas->deleteDrawCommandAt(curCommand+5); // saveLayer
canvas->deleteDrawCommandAt(curCommand+4); // clipRect
canvas->deleteDrawCommandAt(curCommand+3); // save
canvas->deleteDrawCommandAt(curCommand+2); // saveLayer
canvas->deleteDrawCommandAt(curCommand+1); // clipRect
canvas->deleteDrawCommandAt(curCommand); // save
}
