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      1 /*
      2  * Copyright 2016 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "Test.h"
      9 #include "SkBitmap.h"
     10 #include "SkCanvas.h"
     11 #include "SkImage.h"
     12 #include "SkPerlinNoiseShader.h"
     13 #include "SkRRect.h"
     14 #include "SkShader.h"
     15 #include "SkSurface.h"
     16 #include "SkData.h"
     17 
     18 static void check_isaimage(skiatest::Reporter* reporter, SkShader* shader,
     19                            int expectedW, int expectedH,
     20                            SkShader::TileMode expectedX, SkShader::TileMode expectedY,
     21                            const SkMatrix& expectedM) {
     22     SkShader::TileMode tileModes[2];
     23     SkMatrix localM;
     24 
     25     // wack these so we don't get a false positive
     26     localM.setScale(9999, -9999);
     27     tileModes[0] = tileModes[1] = (SkShader::TileMode)99;
     28 
     29     SkImage* image = shader->isAImage(&localM, tileModes);
     30     REPORTER_ASSERT(reporter, image);
     31     REPORTER_ASSERT(reporter, image->width() == expectedW);
     32     REPORTER_ASSERT(reporter, image->height() == expectedH);
     33     REPORTER_ASSERT(reporter, localM == expectedM);
     34     REPORTER_ASSERT(reporter, tileModes[0] == expectedX);
     35     REPORTER_ASSERT(reporter, tileModes[1] == expectedY);
     36 }
     37 
     38 DEF_TEST(Shader_isAImage, reporter) {
     39     const int W = 100;
     40     const int H = 100;
     41     SkBitmap bm;
     42     bm.allocN32Pixels(W, H);
     43     auto img = SkImage::MakeFromBitmap(bm);
     44     const SkMatrix localM = SkMatrix::MakeScale(2, 3);
     45     const SkShader::TileMode tmx = SkShader::kRepeat_TileMode;
     46     const SkShader::TileMode tmy = SkShader::kMirror_TileMode;
     47 
     48     auto shader0 = SkShader::MakeBitmapShader(bm, tmx, tmy, &localM);
     49     auto shader1 = SkImage::MakeFromBitmap(bm)->makeShader(tmx, tmy, &localM);
     50 
     51     check_isaimage(reporter, shader0.get(), W, H, tmx, tmy, localM);
     52     check_isaimage(reporter, shader1.get(), W, H, tmx, tmy, localM);
     53 }
     54 
     55 // Make sure things are ok with just a single leg.
     56 DEF_TEST(ComposeShaderSingle, reporter) {
     57     SkBitmap srcBitmap;
     58     srcBitmap.allocN32Pixels(10, 10);
     59     srcBitmap.eraseColor(SK_ColorRED);
     60     SkCanvas canvas(srcBitmap);
     61     SkPaint p;
     62     p.setShader(
     63         SkShader::MakeComposeShader(
     64         SkShader::MakeEmptyShader(),
     65         SkPerlinNoiseShader::MakeFractalNoise(1.0f, 1.0f, 2, 0.0f),
     66         SkBlendMode::kClear));
     67     SkRRect rr;
     68     SkVector rd[] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}};
     69     rr.setRectRadii({0, 0, 0, 0}, rd);
     70     canvas.drawRRect(rr, p);
     71 }
     72