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- /*
- * 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/SkColor.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkTileMode.h"
- #include "include/core/SkTypes.h"
- #include "include/utils/SkRandom.h"
- #include "src/core/SkMatrixUtils.h"
- #include "tests/Test.h"
- ///////////////////////////////////////////////////////////////////////////////
- static void rand_matrix(SkMatrix* mat, SkRandom& rand, unsigned mask) {
- mat->setIdentity();
- if (mask & SkMatrix::kTranslate_Mask) {
- mat->postTranslate(rand.nextSScalar1(), rand.nextSScalar1());
- }
- if (mask & SkMatrix::kScale_Mask) {
- mat->postScale(rand.nextSScalar1(), rand.nextSScalar1());
- }
- if (mask & SkMatrix::kAffine_Mask) {
- mat->postRotate(rand.nextSScalar1() * 360);
- }
- if (mask & SkMatrix::kPerspective_Mask) {
- mat->setPerspX(rand.nextSScalar1());
- mat->setPerspY(rand.nextSScalar1());
- }
- }
- static void rand_size(SkISize* size, SkRandom& rand) {
- size->set(rand.nextU() & 0xFFFF, rand.nextU() & 0xFFFF);
- }
- static void test_treatAsSprite(skiatest::Reporter* reporter) {
- SkMatrix mat;
- SkISize size;
- SkRandom rand;
- SkPaint noaaPaint;
- SkPaint aaPaint;
- aaPaint.setAntiAlias(true);
- // assert: translate-only no-aa can always be treated as sprite
- for (int i = 0; i < 1000; ++i) {
- rand_matrix(&mat, rand, SkMatrix::kTranslate_Mask);
- for (int j = 0; j < 1000; ++j) {
- rand_size(&size, rand);
- REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, noaaPaint));
- }
- }
- // assert: rotate/perspect is never treated as sprite
- for (int i = 0; i < 1000; ++i) {
- rand_matrix(&mat, rand, SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask);
- for (int j = 0; j < 1000; ++j) {
- rand_size(&size, rand);
- REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, noaaPaint));
- REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
- }
- }
- size.set(500, 600);
- const SkScalar tooMuchSubpixel = 100.1f;
- mat.setTranslate(tooMuchSubpixel, 0);
- REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
- mat.setTranslate(0, tooMuchSubpixel);
- REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
- const SkScalar tinySubPixel = 100.02f;
- mat.setTranslate(tinySubPixel, 0);
- REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, aaPaint));
- mat.setTranslate(0, tinySubPixel);
- REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, aaPaint));
- const SkScalar twoThirds = SK_Scalar1 * 2 / 3;
- const SkScalar bigScale = (size.width() + twoThirds) / size.width();
- mat.setScale(bigScale, bigScale);
- REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, noaaPaint));
- REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
- const SkScalar oneThird = SK_Scalar1 / 3;
- const SkScalar smallScale = (size.width() + oneThird) / size.width();
- mat.setScale(smallScale, smallScale);
- REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, noaaPaint));
- REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
- const SkScalar oneFortyth = SK_Scalar1 / 40;
- const SkScalar tinyScale = (size.width() + oneFortyth) / size.width();
- mat.setScale(tinyScale, tinyScale);
- REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, noaaPaint));
- REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, aaPaint));
- }
- static void test_wacky_bitmapshader(skiatest::Reporter* reporter,
- int width, int height) {
- SkBitmap dev;
- dev.allocN32Pixels(0x56F, 0x4f6);
- dev.eraseColor(SK_ColorTRANSPARENT); // necessary, so we know if we draw to it
- SkMatrix matrix;
- SkCanvas c(dev);
- matrix.setAll(-119.34097f,
- -43.436558f,
- 93489.945f,
- 43.436558f,
- -119.34097f,
- 123.98426f,
- 0, 0, SK_Scalar1);
- c.concat(matrix);
- SkBitmap bm;
- if (bm.tryAllocN32Pixels(width, height)) {
- bm.eraseColor(SK_ColorRED);
- } else {
- SkASSERT(false);
- return;
- }
- matrix.setAll(0.0078740157f,
- 0,
- SkIntToScalar(249),
- 0,
- 0.0078740157f,
- SkIntToScalar(239),
- 0, 0, SK_Scalar1);
- SkPaint paint;
- paint.setShader(bm.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &matrix));
- SkRect r = SkRect::MakeXYWH(681, 239, 695, 253);
- c.drawRect(r, paint);
- for (int y = 0; y < dev.height(); ++y) {
- for (int x = 0; x < dev.width(); ++x) {
- if (SK_ColorTRANSPARENT == *dev.getAddr32(x, y)) {
- REPORTER_ASSERT(reporter, false);
- return;
- }
- }
- }
- }
- // ATTENTION We should always draw each of these sizes safely now. ATTENTION
- // ATTENTION I'm leaving this next /*comment*/ for posterity. ATTENTION
- /*
- * Original bug was asserting that the matrix-proc had generated a (Y) value
- * that was out of range. This led (in the release build) to the sampler-proc
- * reading memory out-of-bounds of the original bitmap.
- *
- * We were numerically overflowing our 16bit coordinates that we communicate
- * between these two procs. The fixes was in two parts:
- *
- * 1. Just don't draw bitmaps larger than 64K-1 in width or height, since we
- * can't represent those coordinates in our transport format (yet).
- * 2. Perform an unsigned shift during the calculation, so we don't get
- * sign-extension bleed when packing the two values (X,Y) into our 32bit
- * slot.
- *
- * This tests exercises the original setup, plus 2 more to ensure that we can,
- * in fact, handle bitmaps at 64K-1 (assuming we don't exceed the total
- * memory allocation limit).
- */
- static void test_giantrepeat_crbug118018(skiatest::Reporter* reporter) {
- static const struct {
- int fWidth;
- int fHeight;
- } gTests[] = {
- { 0x1b294, 0x7f}, // crbug 118018 (width exceeds 64K)... should draw safely now.
- { 0xFFFF, 0x7f }, // should draw, test max width
- { 0x7f, 0xFFFF }, // should draw, test max height
- };
- for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); ++i) {
- test_wacky_bitmapshader(reporter,
- gTests[i].fWidth, gTests[i].fHeight);
- }
- }
- ///////////////////////////////////////////////////////////////////////////////
- static void test_nan_antihair() {
- SkBitmap bm;
- bm.allocN32Pixels(20, 20);
- SkCanvas canvas(bm);
- SkPath path;
- path.moveTo(0, 0);
- path.lineTo(10, SK_ScalarNaN);
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setStyle(SkPaint::kStroke_Style);
- // before our fix to SkScan_Antihair.cpp to check for integral NaN (0x800...)
- // this would trigger an assert/crash.
- //
- // see rev. 3558
- canvas.drawPath(path, paint);
- }
- static bool check_for_all_zeros(const SkBitmap& bm) {
- size_t count = bm.width() * bm.bytesPerPixel();
- for (int y = 0; y < bm.height(); y++) {
- const uint8_t* ptr = reinterpret_cast<const uint8_t*>(bm.getAddr(0, y));
- for (size_t i = 0; i < count; i++) {
- if (ptr[i]) {
- return false;
- }
- }
- }
- return true;
- }
- static const int gWidth = 256;
- static const int gHeight = 256;
- static void create(SkBitmap* bm, SkColor color) {
- bm->allocN32Pixels(gWidth, gHeight);
- bm->eraseColor(color);
- }
- DEF_TEST(DrawBitmapRect, reporter) {
- SkBitmap src, dst;
- create(&src, 0xFFFFFFFF);
- create(&dst, 0);
- SkCanvas canvas(dst);
- SkIRect srcR = { gWidth, 0, gWidth + 16, 16 };
- SkRect dstR = { 0, 0, SkIntToScalar(16), SkIntToScalar(16) };
- canvas.drawBitmapRect(src, srcR, dstR, nullptr);
- // ensure that we draw nothing if srcR does not intersect the bitmap
- REPORTER_ASSERT(reporter, check_for_all_zeros(dst));
- test_nan_antihair();
- test_giantrepeat_crbug118018(reporter);
- test_treatAsSprite(reporter);
- }
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