123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135 |
- /*
- * Copyright 2018 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkTypes.h"
- // This GM shows off a flaw in delta-based rasterizers (DAA, CCPR, etc.).
- // See also the bottom of dashing4 and skia:6886.
- static const int K = 49;
- DEF_SIMPLE_GM(daa, canvas, K+350, 5*K) {
- SkPaint paint;
- paint.setAntiAlias(true);
- {
- paint.setColor(SK_ColorBLACK);
- canvas->drawString("Should be a green square with no red showing through.",
- K*1.5f, K*0.5f, SkFont(), paint);
- paint.setColor(SK_ColorRED);
- canvas->drawRect({0,0,K,K}, paint);
- SkPath path;
- SkPoint tri1[] = {{0,0},{K,K},{0,K},{0,0}};
- SkPoint tri2[] = {{0,0},{K,K},{K,0},{0,0}};
- path.addPoly(tri1, SK_ARRAY_COUNT(tri1), false);
- path.addPoly(tri2, SK_ARRAY_COUNT(tri2), false);
- paint.setColor(SK_ColorGREEN);
- canvas->drawPath(path, paint);
- }
- canvas->translate(0,K);
- {
- paint.setColor(SK_ColorBLACK);
- canvas->drawString("Adjacent rects, two draws. Blue then green, no red?",
- K*1.5f, K*0.5f, SkFont(), paint);
- paint.setColor(SK_ColorRED);
- canvas->drawRect({0,0,K,K}, paint);
- {
- SkPath path;
- SkPoint rect1[] = {{0,0},{0,K},{K*0.5f,K},{K*0.5f,0}};
- path.addPoly(rect1, SK_ARRAY_COUNT(rect1), false);
- paint.setColor(SK_ColorBLUE);
- canvas->drawPath(path, paint);
- }
- {
- SkPath path;
- SkPoint rect2[] = {{K*0.5f,0},{K*0.5f,K},{K,K},{K,0}};
- path.addPoly(rect2, SK_ARRAY_COUNT(rect2), false);
- paint.setColor(SK_ColorGREEN);
- canvas->drawPath(path, paint);
- }
- }
- canvas->translate(0,K);
- {
- paint.setColor(SK_ColorBLACK);
- canvas->drawString("Adjacent rects, wound together. All green?",
- K*1.5f, K*0.5f, SkFont(), paint);
- paint.setColor(SK_ColorRED);
- canvas->drawRect({0,0,K,K}, paint);
- {
- SkPath path;
- SkPoint rect1[] = {{0,0},{0,K},{K*0.5f,K},{K*0.5f,0}};
- SkPoint rect2[] = {{K*0.5f,0},{K*0.5f,K},{K,K},{K,0}};
- path.addPoly(rect1, SK_ARRAY_COUNT(rect1), false);
- path.addPoly(rect2, SK_ARRAY_COUNT(rect2), false);
- paint.setColor(SK_ColorGREEN);
- canvas->drawPath(path, paint);
- }
- }
- canvas->translate(0,K);
- {
- paint.setColor(SK_ColorBLACK);
- canvas->drawString("Adjacent rects, wound opposite. All green?",
- K*1.5f, K*0.5f, SkFont(), paint);
- paint.setColor(SK_ColorRED);
- canvas->drawRect({0,0,K,K}, paint);
- {
- SkPath path;
- SkPoint rect1[] = {{0,0},{0,K},{K*0.5f,K},{K*0.5f,0}};
- SkPoint rect2[] = {{K*0.5f,0},{K,0},{K,K},{K*0.5f,K}};
- path.addPoly(rect1, SK_ARRAY_COUNT(rect1), false);
- path.addPoly(rect2, SK_ARRAY_COUNT(rect2), false);
- paint.setColor(SK_ColorGREEN);
- canvas->drawPath(path, paint);
- }
- }
- canvas->translate(0,K);
- {
- paint.setColor(SK_ColorBLACK);
- canvas->drawString("One poly, wound opposite. All green?",
- K*1.5f, K*0.5f, SkFont(), paint);
- paint.setColor(SK_ColorRED);
- canvas->drawRect({0,0,K,K}, paint);
- {
- SkPath path;
- SkPoint poly[] = {{K*0.5f,0},{0,0},{0,K},{K*0.5f,K},{K*0.5f,0},{K,0},{K,K},{K*0.5f,K}};
- path.addPoly(poly, SK_ARRAY_COUNT(poly), false);
- paint.setColor(SK_ColorGREEN);
- canvas->drawPath(path, paint);
- }
- }
- }
|