blob: 3992a49d44f9c037a593c518b08727ef85ba8700 [file] [log] [blame]
commit-bot@chromium.orgace22692013-06-12 21:33:02 +00001/*
2 * Copyright 2013 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 "SkCanvas.h"
9#include "SkColor.h"
10#include "SkGradientShader.h"
11#include "SkMatrix.h"
12#include "SkPaint.h"
13#include "SkPoint.h"
14#include "SkRect.h"
15#include "SkRefCnt.h"
16#include "SkScalar.h"
17#include "SkSize.h"
18#include "SkString.h"
19
20#include "gm.h"
21
mtkleindbfd7ab2016-09-01 11:24:54 -070022constexpr SkColor gColors[] = {
commit-bot@chromium.orgace22692013-06-12 21:33:02 +000023 SK_ColorRED, SK_ColorYELLOW
24};
25
commit-bot@chromium.org45672092013-06-12 23:36:50 +000026// These annoying defines are necessary, because the only other alternative
commit-bot@chromium.org4b413c82013-11-25 19:44:07 +000027// is to use SkIntToScalar(...) everywhere.
mtkleindbfd7ab2016-09-01 11:24:54 -070028constexpr SkScalar sZero = 0;
29constexpr SkScalar sHalf = SK_ScalarHalf;
30constexpr SkScalar sOne = SK_Scalar1;
commit-bot@chromium.orgace22692013-06-12 21:33:02 +000031
commit-bot@chromium.org45672092013-06-12 23:36:50 +000032// These arrays define the gradient stop points
33// as x1, y1, x2, y2 per gradient to draw.
mtkleindbfd7ab2016-09-01 11:24:54 -070034constexpr SkPoint linearPts[][2] = {
commit-bot@chromium.org45672092013-06-12 23:36:50 +000035 {{sZero, sZero}, {sOne, sZero}},
36 {{sZero, sZero}, {sZero, sOne}},
37 {{sOne, sZero}, {sZero, sZero}},
38 {{sZero, sOne}, {sZero, sZero}},
39
40 {{sZero, sZero}, {sOne, sOne}},
41 {{sOne, sOne}, {sZero, sZero}},
42 {{sOne, sZero}, {sZero, sOne}},
43 {{sZero, sOne}, {sOne, sZero}}
commit-bot@chromium.orgace22692013-06-12 21:33:02 +000044};
45
mtkleindbfd7ab2016-09-01 11:24:54 -070046constexpr SkPoint radialPts[][2] = {
commit-bot@chromium.org45672092013-06-12 23:36:50 +000047 {{sZero, sHalf}, {sOne, sHalf}},
48 {{sHalf, sZero}, {sHalf, sOne}},
49 {{sOne, sHalf}, {sZero, sHalf}},
50 {{sHalf, sOne}, {sHalf, sZero}},
commit-bot@chromium.org1ac1cf62013-06-12 21:47:39 +000051
commit-bot@chromium.org45672092013-06-12 23:36:50 +000052 {{sZero, sZero}, {sOne, sOne}},
53 {{sOne, sOne}, {sZero, sZero}},
54 {{sOne, sZero}, {sZero, sOne}},
55 {{sZero, sOne}, {sOne, sZero}}
commit-bot@chromium.org1ac1cf62013-06-12 21:47:39 +000056};
57
commit-bot@chromium.org45672092013-06-12 23:36:50 +000058// These define the pixels allocated to each gradient image.
mtkleindbfd7ab2016-09-01 11:24:54 -070059constexpr SkScalar TESTGRID_X = SkIntToScalar(200);
60constexpr SkScalar TESTGRID_Y = SkIntToScalar(200);
commit-bot@chromium.orgace22692013-06-12 21:33:02 +000061
mtkleindbfd7ab2016-09-01 11:24:54 -070062constexpr int IMAGES_X = 4; // number of images per row
commit-bot@chromium.orgace22692013-06-12 21:33:02 +000063
reed1a9b9642016-03-13 14:13:58 -070064static sk_sp<SkShader> make_linear_gradient(const SkPoint pts[2], const SkMatrix& localMatrix) {
65 return SkGradientShader::MakeLinear(pts, gColors, nullptr, SK_ARRAY_COUNT(gColors),
66 SkShader::kClamp_TileMode, 0, &localMatrix);
commit-bot@chromium.orgace22692013-06-12 21:33:02 +000067}
68
reed1a9b9642016-03-13 14:13:58 -070069static sk_sp<SkShader> make_radial_gradient(const SkPoint pts[2], const SkMatrix& localMatrix) {
commit-bot@chromium.org1ac1cf62013-06-12 21:47:39 +000070 SkPoint center;
71 center.set(SkScalarAve(pts[0].fX, pts[1].fX),
72 SkScalarAve(pts[0].fY, pts[1].fY));
73 float radius = (center - pts[0]).length();
reed1a9b9642016-03-13 14:13:58 -070074 return SkGradientShader::MakeRadial(center, radius, gColors, nullptr, SK_ARRAY_COUNT(gColors),
75 SkShader::kClamp_TileMode, 0, &localMatrix);
commit-bot@chromium.org1ac1cf62013-06-12 21:47:39 +000076}
77
commit-bot@chromium.org9c9005a2014-04-28 14:55:39 +000078static void draw_gradients(SkCanvas* canvas,
reed1a9b9642016-03-13 14:13:58 -070079 sk_sp<SkShader> (*makeShader)(const SkPoint[2], const SkMatrix&),
commit-bot@chromium.org1ac1cf62013-06-12 21:47:39 +000080 const SkPoint ptsArray[][2], int numImages) {
commit-bot@chromium.orgace22692013-06-12 21:33:02 +000081 // Use some nice prime numbers for the rectangle and matrix with
82 // different scaling along the x and y axes (which is the bug this
83 // test addresses, where incorrect order of operations mixed up the axes)
commit-bot@chromium.org45672092013-06-12 23:36:50 +000084 SkRect rectGrad = {
85 SkIntToScalar(43), SkIntToScalar(61),
86 SkIntToScalar(181), SkIntToScalar(167) };
commit-bot@chromium.orgace22692013-06-12 21:33:02 +000087 SkMatrix shaderMat;
88 shaderMat.setScale(rectGrad.width(), rectGrad.height());
89 shaderMat.postTranslate(rectGrad.left(), rectGrad.top());
90
91 canvas->save();
92 for (int i = 0; i < numImages; i++) {
93 // Advance line downwards if necessary.
94 if (i % IMAGES_X == 0 && i != 0) {
95 canvas->restore();
96 canvas->translate(0, TESTGRID_Y);
97 canvas->save();
98 }
99
commit-bot@chromium.orgace22692013-06-12 21:33:02 +0000100 SkPaint paint;
reed1a9b9642016-03-13 14:13:58 -0700101 paint.setShader(makeShader(*ptsArray, shaderMat));
commit-bot@chromium.orgace22692013-06-12 21:33:02 +0000102 canvas->drawRect(rectGrad, paint);
103
104 // Advance to next position.
105 canvas->translate(TESTGRID_X, 0);
106 ptsArray++;
107 }
108 canvas->restore();
109}
110
halcanary2a243382015-09-09 08:16:41 -0700111DEF_SIMPLE_GM_BG(gradient_matrix, canvas, 800, 800,
112 sk_tool_utils::color_to_565(0xFFDDDDDD)) {
commit-bot@chromium.orgace22692013-06-12 21:33:02 +0000113 draw_gradients(canvas, &make_linear_gradient,
114 linearPts, SK_ARRAY_COUNT(linearPts));
commit-bot@chromium.org1ac1cf62013-06-12 21:47:39 +0000115
116 canvas->translate(0, TESTGRID_Y);
117
118 draw_gradients(canvas, &make_radial_gradient,
119 radialPts, SK_ARRAY_COUNT(radialPts));
commit-bot@chromium.orgace22692013-06-12 21:33:02 +0000120}