commented-out test for exact aa coverage
git-svn-id: http://skia.googlecode.com/svn/trunk@3878 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/aaclip.cpp b/gm/aaclip.cpp
index 2976560..f81bb4d 100644
--- a/gm/aaclip.cpp
+++ b/gm/aaclip.cpp
@@ -9,6 +9,82 @@
#include "SkCanvas.h"
#include "SkPath.h"
+static SkCanvas* MakeCanvas(const SkIRect& bounds) {
+ SkBitmap bm;
+ bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
+ bm.allocPixels();
+ bm.eraseColor(0);
+
+ SkCanvas* canvas = new SkCanvas(bm);
+ canvas->translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop));
+ return canvas;
+}
+
+static void GetBitmap(const SkCanvas* canvas, SkBitmap* bm) {
+ *bm = canvas->getDevice()->accessBitmap(false);
+}
+
+static void compare_canvas(const SkCanvas* a, const SkCanvas* b) {
+ SkBitmap bma, bmb;
+ GetBitmap(a, &bma);
+ GetBitmap(b, &bmb);
+
+ SkASSERT(bma.width() == bmb.width());
+ SkASSERT(bma.height() == bmb.height());
+
+ bma.lockPixels();
+ bmb.lockPixels();
+ for (int y = 0; y < bma.height(); ++y) {
+ const SkPMColor* rowa = bma.getAddr32(0, y);
+ const SkPMColor* rowb = bmb.getAddr32(0, y);
+ SkASSERT(!memcmp(rowa, rowb, bma.width() << 2));
+
+ for (int x = 1; x < bma.width() - 1; ++x) {
+ SkASSERT(0xFF000000 == rowa[x]);
+ SkASSERT(0xFF000000 == rowb[x]);
+ }
+ }
+}
+
+static void drawRectAsPath(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
+ SkPath path;
+ path.addRect(r);
+ canvas->drawPath(path, p);
+}
+
+static void test_maskFromPath(const SkPath& path) {
+ SkIRect bounds;
+ path.getBounds().roundOut(&bounds);
+
+ SkPaint paint;
+ paint.setAntiAlias(true);
+
+ SkAutoTUnref<SkCanvas> path_canvas(MakeCanvas(bounds));
+ path_canvas->drawPath(path, paint);
+
+ SkAutoTUnref<SkCanvas> rect_canvas(MakeCanvas(bounds));
+ drawRectAsPath(rect_canvas, path.getBounds(), paint);
+
+ compare_canvas(path_canvas, rect_canvas);
+}
+
+static void test_mask() {
+ for (int i = 1; i <= 20; ++i) {
+ const SkScalar dx = SK_Scalar1 / i;
+ const SkRect constr = SkRect::MakeWH(dx, SkIntToScalar(2));
+ for (int n = 2; n < 20; ++n) {
+ SkPath path;
+ path.setFillType(SkPath::kEvenOdd_FillType);
+ SkRect r = constr;
+ while (r.fRight < SkIntToScalar(4)) {
+ path.addRect(r);
+ r.offset(dx, 0);
+ }
+ test_maskFromPath(path);
+ }
+ }
+}
+
namespace skiagm {
/** Draw a 2px border around the target, then red behind the target;
@@ -82,6 +158,8 @@
}
virtual void onDraw(SkCanvas* canvas) {
+// test_mask();
+
// Initial pixel-boundary-aligned draw
draw_rect_tests(canvas);