add a simple ascii-art debug thing for AA clips
BUG=skia:
R=reed@google.com
Author: humper@google.com
Review URL: https://codereview.chromium.org/450423002
diff --git a/src/core/SkAAClip.cpp b/src/core/SkAAClip.cpp
index 5d21a47..58a16f3 100644
--- a/src/core/SkAAClip.cpp
+++ b/src/core/SkAAClip.cpp
@@ -219,6 +219,46 @@
--yoff;
SkASSERT(yoff->fY == lastY);
}
+
+static void dump_one_row(const uint8_t* SK_RESTRICT row,
+ int width, int leading_num) {
+ if (leading_num) {
+ SkDebugf( "%03d ", leading_num );
+ }
+ while (width > 0) {
+ int n = row[0];
+ int val = row[1];
+ char out = '.';
+ if (val == 0xff) {
+ out = '*';
+ } else if (val > 0) {
+ out = '+';
+ }
+ for (int i = 0 ; i < n ; i++) {
+ SkDebugf( "%c", out );
+ }
+ row += 2;
+ width -= n;
+ }
+ SkDebugf( "\n" );
+}
+
+void SkAAClip::debug(bool compress_y) const {
+ Iter iter(*this);
+ const int width = fBounds.width();
+
+ int y = fBounds.fTop;
+ while (!iter.done()) {
+ if (compress_y) {
+ dump_one_row(iter.data(), width, iter.bottom() - iter.top() + 1);
+ } else {
+ do {
+ dump_one_row(iter.data(), width, 0);
+ } while (++y < iter.bottom());
+ }
+ iter.next();
+ }
+}
#endif
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