1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "Test.h"
9#include "SkCanvas.h"
10#include "SkShader.h"
11#include "SkRectShaderImageFilter.h"
12#include "SkGradientShader.h"
13
14static void test_asShaderMode(skiatest::Reporter* reporter) {
15    int w = 10, h = 10;
16    SkRect r = SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h)); // Make small 10x10 gradient
17
18    SkBitmap filterResult, shaderResult;
19
20    filterResult.setConfig(SkBitmap::kARGB_8888_Config, w, h);
21    filterResult.allocPixels();
22    SkCanvas canvasFilter(filterResult);
23    canvasFilter.clear(0x00000000);
24
25    shaderResult.setConfig(SkBitmap::kARGB_8888_Config, w, h);
26    shaderResult.allocPixels();
27    SkCanvas canvasShader(shaderResult);
28    canvasShader.clear(0x00000000);
29
30    SkPoint center = SkPoint::Make(SkIntToScalar(5), SkIntToScalar(5));
31    SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN};
32    SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1};
33    SkScalar radius = SkIntToScalar(5);
34
35    // Test using the image filter
36    {
37        SkShader* s = SkGradientShader::CreateRadial(
38            center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode);
39        SkPaint paint;
40        paint.setImageFilter(SkRectShaderImageFilter::Create(s, r))->unref();
41        canvasFilter.drawRect(r, paint);
42        s->unref();
43    }
44
45    // Test using the shader directly
46    {
47        SkShader* s = SkGradientShader::CreateRadial(
48            center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode);
49        SkPaint paint;
50        paint.setShader(s)->unref();
51        canvasShader.drawRect(r, paint);
52    }
53
54    // Assert that both paths yielded the same result
55    for (int y = 0; y < r.height(); ++y) {
56        const SkPMColor* filterPtr = filterResult.getAddr32(0, y);
57        const SkPMColor* shaderPtr = shaderResult.getAddr32(0, y);
58        for (int x = 0; x < r.width(); ++x, ++filterPtr, ++shaderPtr) {
59            REPORTER_ASSERT(reporter, *filterPtr == *shaderPtr);
60        }
61    }
62}
63
64#include "TestClassDef.h"
65DEFINE_TESTCLASS("ShaderImageFilter", ShaderImageFilterTestClass, test_asShaderMode)
66