123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157 |
- /*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkPath.h"
- #include "tests/Test.h"
- #define DIMENSION 32
- static void drawAndTest(skiatest::Reporter* reporter, const SkPath& path,
- const SkPaint& paint, bool shouldDraw) {
- SkBitmap bm;
- bm.allocN32Pixels(DIMENSION, DIMENSION);
- SkASSERT(DIMENSION*4 == bm.rowBytes()); // ensure no padding on each row
- bm.eraseColor(SK_ColorTRANSPARENT);
- SkCanvas canvas(bm);
- SkPaint p(paint);
- p.setColor(SK_ColorWHITE);
- canvas.drawPath(path, p);
- size_t count = DIMENSION * DIMENSION;
- const SkPMColor* ptr = bm.getAddr32(0, 0);
- SkPMColor andValue = ~0U;
- SkPMColor orValue = 0;
- for (size_t i = 0; i < count; ++i) {
- SkPMColor c = ptr[i];
- andValue &= c;
- orValue |= c;
- }
- // success means we drew everywhere or nowhere (depending on shouldDraw)
- bool success = shouldDraw ? (~0U == andValue) : (0 == orValue);
- if (!success) {
- const char* str;
- if (shouldDraw) {
- str = "Path expected to draw everywhere, but didn't. ";
- } else {
- str = "Path expected to draw nowhere, but did. ";
- }
- ERRORF(reporter, "%s style[%d] cap[%d] join[%d] antialias[%d]"
- " filltype[%d] ptcount[%d]", str, paint.getStyle(),
- paint.getStrokeCap(), paint.getStrokeJoin(),
- paint.isAntiAlias(), path.getFillType(), path.countPoints());
- // uncomment this if you want to step in to see the failure
- // canvas.drawPath(path, p);
- }
- }
- enum DrawCaps {
- kDontDrawCaps,
- kDrawCaps
- };
- static void iter_paint(skiatest::Reporter* reporter, const SkPath& path, bool shouldDraw,
- DrawCaps drawCaps) {
- static const SkPaint::Cap gCaps[] = {
- SkPaint::kButt_Cap,
- SkPaint::kRound_Cap,
- SkPaint::kSquare_Cap
- };
- static const SkPaint::Join gJoins[] = {
- SkPaint::kMiter_Join,
- SkPaint::kRound_Join,
- SkPaint::kBevel_Join
- };
- static const SkPaint::Style gStyles[] = {
- SkPaint::kFill_Style,
- SkPaint::kStroke_Style,
- SkPaint::kStrokeAndFill_Style
- };
- for (size_t cap = 0; cap < SK_ARRAY_COUNT(gCaps); ++cap) {
- for (size_t join = 0; join < SK_ARRAY_COUNT(gJoins); ++join) {
- for (size_t style = 0; style < SK_ARRAY_COUNT(gStyles); ++style) {
- if (drawCaps && SkPaint::kButt_Cap != gCaps[cap]
- && SkPaint::kFill_Style != gStyles[style]) {
- continue;
- }
- SkPaint paint;
- paint.setStrokeWidth(SkIntToScalar(10));
- paint.setStrokeCap(gCaps[cap]);
- paint.setStrokeJoin(gJoins[join]);
- paint.setStyle(gStyles[style]);
- paint.setAntiAlias(false);
- drawAndTest(reporter, path, paint, shouldDraw);
- paint.setAntiAlias(true);
- drawAndTest(reporter, path, paint, shouldDraw);
- }
- }
- }
- }
- #define CX (SkIntToScalar(DIMENSION) / 2)
- #define CY (SkIntToScalar(DIMENSION) / 2)
- static void make_empty(SkPath*) {}
- static void make_M(SkPath* path) { path->moveTo(CX, CY); }
- static void make_MM(SkPath* path) { path->moveTo(CX, CY).moveTo(CX, CY); }
- static void make_MZM(SkPath* path) { path->moveTo(CX, CY).close().moveTo(CX, CY); }
- static void make_L(SkPath* path) { path->moveTo(CX, CY).lineTo(CX, CY); }
- static void make_Q(SkPath* path) { path->moveTo(CX, CY).quadTo(CX, CY, CX, CY); }
- static void make_C(SkPath* path) { path->moveTo(CX, CY).cubicTo(CX, CY, CX, CY, CX, CY); }
- /* Two invariants are tested: How does an empty/degenerate path draw?
- * - if the path is drawn inverse, it should draw everywhere
- * - if the path is drawn non-inverse, it should draw nowhere
- *
- * Things to iterate on:
- * - path (empty, degenerate line/quad/cubic w/ and w/o close
- * - paint style
- * - path filltype
- * - path stroke variants (e.g. caps, joins, width)
- */
- static void test_emptydrawing(skiatest::Reporter* reporter) {
- static void (*gMakeProc[])(SkPath*) = {
- make_empty, make_M, make_MM, make_MZM, make_L, make_Q, make_C
- };
- static SkPath::FillType gFills[] = {
- SkPath::kWinding_FillType,
- SkPath::kEvenOdd_FillType,
- SkPath::kInverseWinding_FillType,
- SkPath::kInverseEvenOdd_FillType
- };
- for (int doClose = 0; doClose < 2; ++doClose) {
- for (size_t i = 0; i < SK_ARRAY_COUNT(gMakeProc); ++i) {
- SkPath path;
- gMakeProc[i](&path);
- if (doClose) {
- path.close();
- }
- /* zero length segments and close following moves draw round and square caps */
- bool allowCaps = make_L == gMakeProc[i] || make_Q == gMakeProc[i]
- || make_C == gMakeProc[i] || make_MZM == gMakeProc[i];
- allowCaps |= SkToBool(doClose);
- for (size_t fill = 0; fill < SK_ARRAY_COUNT(gFills); ++fill) {
- path.setFillType(gFills[fill]);
- bool shouldDraw = path.isInverseFillType();
- iter_paint(reporter, path, shouldDraw, allowCaps ? kDrawCaps : kDontDrawCaps);
- }
- }
- }
- }
- DEF_TEST(EmptyPath, reporter) {
- test_emptydrawing(reporter);
- }
|