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181 lines
6.1 KiB
181 lines
6.1 KiB
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPathEffect.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSurface.h"
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#include "include/core/SkTextBlob.h"
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#include "include/core/SkTypeface.h"
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#include "include/core/SkTypes.h"
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#include "include/effects/SkDashPathEffect.h"
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#include "tests/Test.h"
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#include <cmath>
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static const SkColor bgColor = SK_ColorWHITE;
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static void create(SkBitmap* bm, SkIRect bound) {
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bm->allocN32Pixels(bound.width(), bound.height());
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}
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/** Assumes that the ref draw was completely inside ref canvas --
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implies that everything outside is "bgColor".
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Checks that all overlap is the same and that all non-overlap on the
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ref is "bgColor".
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*/
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static bool compare(const SkBitmap& ref, const SkIRect& iref,
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const SkBitmap& test, const SkIRect& itest)
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{
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const int xOff = itest.fLeft - iref.fLeft;
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const int yOff = itest.fTop - iref.fTop;
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for (int y = 0; y < test.height(); ++y) {
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for (int x = 0; x < test.width(); ++x) {
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SkColor testColor = test.getColor(x, y);
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int refX = x + xOff;
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int refY = y + yOff;
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SkColor refColor;
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if (refX >= 0 && refX < ref.width() &&
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refY >= 0 && refY < ref.height())
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{
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refColor = ref.getColor(refX, refY);
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} else {
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refColor = bgColor;
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}
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if (refColor != testColor) {
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return false;
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}
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}
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}
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return true;
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}
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/** Test that drawing glyphs with empty paths is different from drawing glyphs without paths. */
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DEF_TEST(DrawText_dashout, reporter) {
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SkIRect size = SkIRect::MakeWH(64, 64);
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SkBitmap drawTextBitmap;
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create(&drawTextBitmap, size);
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SkCanvas drawTextCanvas(drawTextBitmap);
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SkBitmap drawDashedTextBitmap;
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create(&drawDashedTextBitmap, size);
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SkCanvas drawDashedTextCanvas(drawDashedTextBitmap);
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SkBitmap emptyBitmap;
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create(&emptyBitmap, size);
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SkCanvas emptyCanvas(emptyBitmap);
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SkPoint point = SkPoint::Make(25.0f, 25.0f);
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SkFont font(nullptr, 20);
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font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
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font.setSubpixel(true);
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SkPaint paint;
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paint.setColor(SK_ColorGRAY);
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paint.setStyle(SkPaint::kStroke_Style);
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// Draw a stroked "A" without a dash which will draw something.
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drawTextCanvas.drawColor(SK_ColorWHITE);
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drawTextCanvas.drawString("A", point.fX, point.fY, font, paint);
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// Draw an "A" but with a dash which will never draw anything.
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paint.setStrokeWidth(2);
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constexpr SkScalar bigInterval = 10000;
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static constexpr SkScalar intervals[] = { 1, bigInterval };
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paint.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 2));
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drawDashedTextCanvas.drawColor(SK_ColorWHITE);
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drawDashedTextCanvas.drawString("A", point.fX, point.fY, font, paint);
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// Draw nothing.
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emptyCanvas.drawColor(SK_ColorWHITE);
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REPORTER_ASSERT(reporter, !compare(drawTextBitmap, size, emptyBitmap, size));
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REPORTER_ASSERT(reporter, compare(drawDashedTextBitmap, size, emptyBitmap, size));
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}
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// Test drawing text at some unusual coordinates.
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// We measure success by not crashing or asserting.
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DEF_TEST(DrawText_weirdCoordinates, r) {
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auto surface = SkSurface::MakeRasterN32Premul(10,10);
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auto canvas = surface->getCanvas();
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SkScalar oddballs[] = { 0.0f, (float)INFINITY, (float)NAN, 34359738368.0f };
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for (auto x : oddballs) {
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canvas->drawString("a", +x, 0.0f, SkFont(), SkPaint());
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canvas->drawString("a", -x, 0.0f, SkFont(), SkPaint());
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}
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for (auto y : oddballs) {
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canvas->drawString("a", 0.0f, +y, SkFont(), SkPaint());
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canvas->drawString("a", 0.0f, -y, SkFont(), SkPaint());
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}
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}
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// Test drawing text with some unusual matricies.
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// We measure success by not crashing or asserting.
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DEF_TEST(DrawText_weirdMatricies, r) {
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auto surface = SkSurface::MakeRasterN32Premul(100,100);
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auto canvas = surface->getCanvas();
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SkFont font;
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font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
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struct {
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SkScalar textSize;
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SkScalar matrix[9];
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} testCases[] = {
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// 2x2 singular
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{10, { 0, 0, 0, 0, 0, 0, 0, 0, 1}},
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{10, { 0, 0, 0, 0, 1, 0, 0, 0, 1}},
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{10, { 0, 0, 0, 1, 0, 0, 0, 0, 1}},
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{10, { 0, 0, 0, 1, 1, 0, 0, 0, 1}},
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{10, { 0, 1, 0, 0, 1, 0, 0, 0, 1}},
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{10, { 1, 0, 0, 0, 0, 0, 0, 0, 1}},
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{10, { 1, 0, 0, 1, 0, 0, 0, 0, 1}},
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{10, { 1, 1, 0, 0, 0, 0, 0, 0, 1}},
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{10, { 1, 1, 0, 1, 1, 0, 0, 0, 1}},
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// See https://bugzilla.mozilla.org/show_bug.cgi?id=1305085 .
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{ 1, {10, 20, 0, 20, 40, 0, 0, 0, 1}},
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};
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for (const auto& testCase : testCases) {
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font.setSize(testCase.textSize);
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const SkScalar(&m)[9] = testCase.matrix;
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SkMatrix mat;
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mat.setAll(m[0], m[1], m[2], m[3], m[4], m[5], m[6], m[7], m[8]);
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canvas->setMatrix(mat);
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canvas->drawString("Hamburgefons", 10, 10, font, SkPaint());
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}
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}
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// This produces no glyphs, and is to check that buffers from previous draws don't get
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// reused.
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DEF_TEST(DrawText_noglyphs, r) {
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auto surface = SkSurface::MakeRasterN32Premul(100,100);
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auto canvas = surface->getCanvas();
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auto text = "Hamburgfons";
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{
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// scoped to ensure blob is deleted.
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auto blob = SkTextBlob::MakeFromText(text, strlen(text), SkFont());
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canvas->drawTextBlob(blob, 10, 10, SkPaint());
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}
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canvas->drawString(
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"\x0d\xf3\xf2\xf2\xe9\x0d\x0d\x0d\x05\x0d\x0d\xe3\xe3\xe3\xe3\xe3\xe3\xe3\xe3\xe3",
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10, 20, SkFont(), SkPaint());
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}
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