add impl for drawBitmapNine
git-svn-id: http://skia.googlecode.com/svn/trunk@2234 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 3bb193b..1f75aa9 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1273,19 +1273,20 @@
this->internalDrawBitmap(bitmap, NULL, matrix, paint);
}
-void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
- const SkRect& dst, const SkPaint* paint) {
+// this one is non-virtual, so it can be called safely by other canvas apis
+void SkCanvas::internalDrawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
+ const SkRect& dst, const SkPaint* paint) {
if (bitmap.width() == 0 || bitmap.height() == 0 || dst.isEmpty()) {
return;
}
-
+
// do this now, to avoid the cost of calling extract for RLE bitmaps
if (this->quickReject(dst, paint2EdgeType(paint))) {
return;
}
-
+
const SkBitmap* bitmapPtr = &bitmap;
-
+
SkMatrix matrix;
SkRect tmpSrc;
if (src) {
@@ -1305,7 +1306,7 @@
SkIntToScalar(bitmap.height()));
}
matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);
-
+
// 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;
@@ -1319,6 +1320,12 @@
this->internalDrawBitmap(*bitmapPtr, src, matrix, paint);
}
+void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
+ const SkRect& dst, const SkPaint* paint) {
+ SkDEBUGCODE(bitmap.validate();)
+ this->internalDrawBitmapRect(bitmap, src, dst, paint);
+}
+
void SkCanvas::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& matrix,
const SkPaint* paint) {
SkDEBUGCODE(bitmap.validate();)
@@ -1338,6 +1345,65 @@
LOOPER_END
}
+void SkCanvas::internalDrawBitmapNine(const SkBitmap& bitmap,
+ const SkIRect& center, const SkRect& dst,
+ const SkPaint* paint) {
+ const int32_t w = bitmap.width();
+ const int32_t h = bitmap.height();
+
+ SkIRect c = center;
+ // pin center to the bounds of the bitmap
+ c.fLeft = SkMax32(0, center.fLeft);
+ c.fTop = SkMax32(0, center.fTop);
+ c.fRight = SkPin32(center.fRight, c.fLeft, w);
+ c.fBottom = SkPin32(center.fBottom, c.fTop, h);
+
+ const int32_t srcX[4] = { 0, c.fLeft, c.fRight, w };
+ const int32_t srcY[4] = { 0, c.fTop, c.fBottom, h };
+ SkScalar dstX[4] = {
+ dst.fLeft, dst.fLeft + SkIntToScalar(c.fLeft),
+ dst.fRight - SkIntToScalar(w - c.fRight), dst.fRight
+ };
+ SkScalar dstY[4] = {
+ dst.fTop, dst.fTop + SkIntToScalar(c.fTop),
+ dst.fBottom - SkIntToScalar(h - c.fBottom), dst.fBottom
+ };
+
+ if (dstX[1] > dstX[2]) {
+ dstX[1] = dstX[0] + (dstX[3] - dstX[0]) * c.fLeft / (w - c.width());
+ dstX[2] = dstX[1];
+ }
+
+ if (dstY[1] > dstY[2]) {
+ dstY[1] = dstY[0] + (dstY[3] - dstY[0]) * c.fTop / (h - c.height());
+ dstY[2] = dstY[1];
+ }
+
+ SkIRect s;
+ SkRect d;
+ for (int y = 0; y < 3; y++) {
+ s.fTop = srcY[y];
+ s.fBottom = srcY[y+1];
+ d.fTop = dstY[y];
+ d.fBottom = dstY[y+1];
+ for (int x = 0; x < 3; x++) {
+ s.fLeft = srcX[x];
+ s.fRight = srcX[x+1];
+ d.fLeft = dstX[x];
+ d.fRight = dstX[x+1];
+ this->internalDrawBitmapRect(bitmap, &s, d, paint);
+ }
+ }
+}
+
+void SkCanvas::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
+ const SkRect& dst, const SkPaint* paint) {
+ SkDEBUGCODE(bitmap.validate();)
+
+ // Need a device entry-point, so gpu can use a mesh
+ this->internalDrawBitmapNine(bitmap, center, dst, paint);
+}
+
void SkCanvas::drawSprite(const SkBitmap& bitmap, int x, int y,
const SkPaint* paint) {
SkDEBUGCODE(bitmap.validate();)