9707a7e51c
Change-Id: I0cb383eb6ea5a302627f93b90182a7286c2c0995 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/212280 Reviewed-by: Hal Canary <halcanary@google.com> Commit-Queue: Ben Wagner <bungeman@google.com>
260 lines
8.3 KiB
C++
260 lines
8.3 KiB
C++
/*
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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/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPath.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkTileMode.h"
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#include "include/core/SkTypes.h"
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#include "include/utils/SkRandom.h"
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#include "src/core/SkMatrixUtils.h"
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#include "tests/Test.h"
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///////////////////////////////////////////////////////////////////////////////
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static void rand_matrix(SkMatrix* mat, SkRandom& rand, unsigned mask) {
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mat->setIdentity();
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if (mask & SkMatrix::kTranslate_Mask) {
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mat->postTranslate(rand.nextSScalar1(), rand.nextSScalar1());
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}
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if (mask & SkMatrix::kScale_Mask) {
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mat->postScale(rand.nextSScalar1(), rand.nextSScalar1());
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}
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if (mask & SkMatrix::kAffine_Mask) {
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mat->postRotate(rand.nextSScalar1() * 360);
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}
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if (mask & SkMatrix::kPerspective_Mask) {
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mat->setPerspX(rand.nextSScalar1());
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mat->setPerspY(rand.nextSScalar1());
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}
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}
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static void rand_size(SkISize* size, SkRandom& rand) {
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size->set(rand.nextU() & 0xFFFF, rand.nextU() & 0xFFFF);
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}
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static void test_treatAsSprite(skiatest::Reporter* reporter) {
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SkMatrix mat;
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SkISize size;
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SkRandom rand;
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SkPaint noaaPaint;
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SkPaint aaPaint;
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aaPaint.setAntiAlias(true);
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// assert: translate-only no-aa can always be treated as sprite
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for (int i = 0; i < 1000; ++i) {
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rand_matrix(&mat, rand, SkMatrix::kTranslate_Mask);
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for (int j = 0; j < 1000; ++j) {
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rand_size(&size, rand);
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REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, noaaPaint));
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}
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}
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// assert: rotate/perspect is never treated as sprite
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for (int i = 0; i < 1000; ++i) {
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rand_matrix(&mat, rand, SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask);
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for (int j = 0; j < 1000; ++j) {
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rand_size(&size, rand);
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REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, noaaPaint));
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REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
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}
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}
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size.set(500, 600);
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const SkScalar tooMuchSubpixel = 100.1f;
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mat.setTranslate(tooMuchSubpixel, 0);
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REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
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mat.setTranslate(0, tooMuchSubpixel);
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REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
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const SkScalar tinySubPixel = 100.02f;
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mat.setTranslate(tinySubPixel, 0);
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REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, aaPaint));
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mat.setTranslate(0, tinySubPixel);
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REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, aaPaint));
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const SkScalar twoThirds = SK_Scalar1 * 2 / 3;
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const SkScalar bigScale = (size.width() + twoThirds) / size.width();
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mat.setScale(bigScale, bigScale);
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REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, noaaPaint));
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REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
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const SkScalar oneThird = SK_Scalar1 / 3;
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const SkScalar smallScale = (size.width() + oneThird) / size.width();
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mat.setScale(smallScale, smallScale);
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REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, noaaPaint));
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REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, aaPaint));
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const SkScalar oneFortyth = SK_Scalar1 / 40;
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const SkScalar tinyScale = (size.width() + oneFortyth) / size.width();
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mat.setScale(tinyScale, tinyScale);
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REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, noaaPaint));
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REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, aaPaint));
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}
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static void test_wacky_bitmapshader(skiatest::Reporter* reporter,
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int width, int height) {
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SkBitmap dev;
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dev.allocN32Pixels(0x56F, 0x4f6);
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dev.eraseColor(SK_ColorTRANSPARENT); // necessary, so we know if we draw to it
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SkMatrix matrix;
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SkCanvas c(dev);
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matrix.setAll(-119.34097f,
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-43.436558f,
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93489.945f,
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43.436558f,
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-119.34097f,
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123.98426f,
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0, 0, SK_Scalar1);
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c.concat(matrix);
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SkBitmap bm;
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if (bm.tryAllocN32Pixels(width, height)) {
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bm.eraseColor(SK_ColorRED);
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} else {
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SkASSERT(false);
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return;
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}
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matrix.setAll(0.0078740157f,
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0,
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SkIntToScalar(249),
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0,
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0.0078740157f,
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SkIntToScalar(239),
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0, 0, SK_Scalar1);
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SkPaint paint;
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paint.setShader(bm.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &matrix));
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SkRect r = SkRect::MakeXYWH(681, 239, 695, 253);
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c.drawRect(r, paint);
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for (int y = 0; y < dev.height(); ++y) {
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for (int x = 0; x < dev.width(); ++x) {
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if (SK_ColorTRANSPARENT == *dev.getAddr32(x, y)) {
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REPORTER_ASSERT(reporter, false);
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return;
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}
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}
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}
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}
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// ATTENTION We should always draw each of these sizes safely now. ATTENTION
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// ATTENTION I'm leaving this next /*comment*/ for posterity. ATTENTION
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/*
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* Original bug was asserting that the matrix-proc had generated a (Y) value
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* that was out of range. This led (in the release build) to the sampler-proc
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* reading memory out-of-bounds of the original bitmap.
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*
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* We were numerically overflowing our 16bit coordinates that we communicate
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* between these two procs. The fixes was in two parts:
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*
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* 1. Just don't draw bitmaps larger than 64K-1 in width or height, since we
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* can't represent those coordinates in our transport format (yet).
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* 2. Perform an unsigned shift during the calculation, so we don't get
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* sign-extension bleed when packing the two values (X,Y) into our 32bit
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* slot.
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*
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* This tests exercises the original setup, plus 2 more to ensure that we can,
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* in fact, handle bitmaps at 64K-1 (assuming we don't exceed the total
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* memory allocation limit).
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*/
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static void test_giantrepeat_crbug118018(skiatest::Reporter* reporter) {
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static const struct {
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int fWidth;
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int fHeight;
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} gTests[] = {
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{ 0x1b294, 0x7f}, // crbug 118018 (width exceeds 64K)... should draw safely now.
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{ 0xFFFF, 0x7f }, // should draw, test max width
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{ 0x7f, 0xFFFF }, // should draw, test max height
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); ++i) {
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test_wacky_bitmapshader(reporter,
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gTests[i].fWidth, gTests[i].fHeight);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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static void test_nan_antihair() {
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SkBitmap bm;
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bm.allocN32Pixels(20, 20);
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SkCanvas canvas(bm);
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SkPath path;
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path.moveTo(0, 0);
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path.lineTo(10, SK_ScalarNaN);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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// before our fix to SkScan_Antihair.cpp to check for integral NaN (0x800...)
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// this would trigger an assert/crash.
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//
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// see rev. 3558
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canvas.drawPath(path, paint);
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}
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static bool check_for_all_zeros(const SkBitmap& bm) {
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size_t count = bm.width() * bm.bytesPerPixel();
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for (int y = 0; y < bm.height(); y++) {
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const uint8_t* ptr = reinterpret_cast<const uint8_t*>(bm.getAddr(0, y));
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for (size_t i = 0; i < count; i++) {
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if (ptr[i]) {
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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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static const int gWidth = 256;
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static const int gHeight = 256;
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static void create(SkBitmap* bm, SkColor color) {
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bm->allocN32Pixels(gWidth, gHeight);
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bm->eraseColor(color);
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}
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DEF_TEST(DrawBitmapRect, reporter) {
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SkBitmap src, dst;
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create(&src, 0xFFFFFFFF);
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create(&dst, 0);
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SkCanvas canvas(dst);
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SkIRect srcR = { gWidth, 0, gWidth + 16, 16 };
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SkRect dstR = { 0, 0, SkIntToScalar(16), SkIntToScalar(16) };
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canvas.drawBitmapRect(src, srcR, dstR, nullptr);
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// ensure that we draw nothing if srcR does not intersect the bitmap
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REPORTER_ASSERT(reporter, check_for_all_zeros(dst));
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test_nan_antihair();
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test_giantrepeat_crbug118018(reporter);
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test_treatAsSprite(reporter);
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}
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