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- /*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkBlendMode.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkTileMode.h"
- #include "include/core/SkTypes.h"
- #include "include/effects/SkGradientShader.h"
- #include "src/utils/SkPatchUtils.h"
- #include "tools/Resources.h"
- static sk_sp<SkShader> make_shader() {
- const SkColor colors[] = {
- SK_ColorRED, SK_ColorCYAN, SK_ColorGREEN, SK_ColorWHITE, SK_ColorMAGENTA, SK_ColorBLUE,
- SK_ColorYELLOW,
- };
- const SkPoint pts[] = { { 100.f / 4.f, 0.f }, { 3.f * 100.f / 4.f, 100.f } };
- return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
- SkTileMode::kMirror);
- }
- static void draw_control_points(SkCanvas* canvas, const SkPoint cubics[12]) {
- //draw control points
- SkPaint paint;
- SkPoint bottom[SkPatchUtils::kNumPtsCubic];
- SkPatchUtils::GetBottomCubic(cubics, bottom);
- SkPoint top[SkPatchUtils::kNumPtsCubic];
- SkPatchUtils::GetTopCubic(cubics, top);
- SkPoint left[SkPatchUtils::kNumPtsCubic];
- SkPatchUtils::GetLeftCubic(cubics, left);
- SkPoint right[SkPatchUtils::kNumPtsCubic];
- SkPatchUtils::GetRightCubic(cubics, right);
- paint.setColor(SK_ColorBLACK);
- paint.setStrokeWidth(0.5f);
- SkPoint corners[4] = { bottom[0], bottom[3], top[0], top[3] };
- canvas->drawPoints(SkCanvas::kLines_PointMode, 4, bottom, paint);
- canvas->drawPoints(SkCanvas::kLines_PointMode, 2, bottom + 1, paint);
- canvas->drawPoints(SkCanvas::kLines_PointMode, 4, top, paint);
- canvas->drawPoints(SkCanvas::kLines_PointMode, 4, left, paint);
- canvas->drawPoints(SkCanvas::kLines_PointMode, 4, right, paint);
- canvas->drawPoints(SkCanvas::kLines_PointMode, 2, top + 1, paint);
- canvas->drawPoints(SkCanvas::kLines_PointMode, 2, left + 1, paint);
- canvas->drawPoints(SkCanvas::kLines_PointMode, 2, right + 1, paint);
- paint.setStrokeWidth(2);
- paint.setColor(SK_ColorRED);
- canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, corners, paint);
- paint.setColor(SK_ColorBLUE);
- canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, bottom + 1, paint);
- paint.setColor(SK_ColorCYAN);
- canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, top + 1, paint);
- paint.setColor(SK_ColorYELLOW);
- canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, left + 1, paint);
- paint.setColor(SK_ColorGREEN);
- canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, right + 1, paint);
- }
- // The order of the colors and points is clockwise starting at upper-left corner.
- const SkPoint gCubics[SkPatchUtils::kNumCtrlPts] = {
- //top points
- {100,100},{150,50},{250,150}, {300,100},
- //right points
- {250, 150},{350,250},
- //bottom points
- {300,300},{250,250},{150,350},{100,300},
- //left points
- {50,250},{150,150}
- };
- const SkPoint gTexCoords[SkPatchUtils::kNumCorners] = {
- {0.0f, 0.0f}, {100.0f, 0.0f}, {100.0f,100.0f}, {0.0f, 100.0f}
- };
- static void dopatch(SkCanvas* canvas, const SkColor colors[], sk_sp<SkImage> img = nullptr) {
- SkPaint paint;
- const SkBlendMode modes[] = {
- SkBlendMode::kSrc,
- SkBlendMode::kDst,
- SkBlendMode::kModulate,
- };
- SkPoint texStorage[4];
- const SkPoint* tex = gTexCoords;
- sk_sp<SkShader> shader;
- if (img) {
- SkScalar w = img->width();
- SkScalar h = img->height();
- shader = img->makeShader();
- texStorage[0].set(0, 0);
- texStorage[1].set(w, 0);
- texStorage[2].set(w, h);
- texStorage[3].set(0, h);
- tex = texStorage;
- } else {
- shader = make_shader();
- }
- canvas->save();
- for (int y = 0; y < 3; y++) {
- for (int x = 0; x < 4; x++) {
- canvas->save();
- canvas->translate(x * 350.0f, y * 350.0f);
- switch (x) {
- case 0:
- canvas->drawPatch(gCubics, nullptr, nullptr, modes[y], paint);
- break;
- case 1:
- canvas->drawPatch(gCubics, colors, nullptr, modes[y], paint);
- break;
- case 2:
- paint.setShader(shader);
- canvas->drawPatch(gCubics, nullptr, tex, modes[y], paint);
- paint.setShader(nullptr);
- break;
- case 3:
- paint.setShader(shader);
- canvas->drawPatch(gCubics, colors, tex, modes[y], paint);
- paint.setShader(nullptr);
- break;
- default:
- break;
- }
- draw_control_points(canvas, gCubics);
- canvas->restore();
- }
- }
- canvas->restore();
- }
- DEF_SIMPLE_GM(patch_primitive, canvas, 1500, 1100) {
- const SkColor colors[SkPatchUtils::kNumCorners] = {
- SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN
- };
- dopatch(canvas, colors);
- }
- DEF_SIMPLE_GM(patch_image, canvas, 1500, 1100) {
- const SkColor colors[SkPatchUtils::kNumCorners] = {
- SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN
- };
- dopatch(canvas, colors, GetResourceAsImage("images/mandrill_128.png"));
- }
- DEF_SIMPLE_GM(patch_alpha, canvas, 1500, 1100) {
- const SkColor colors[SkPatchUtils::kNumCorners] = {
- SK_ColorRED, 0x0000FF00, SK_ColorBLUE, 0x00FF00FF,
- };
- dopatch(canvas, colors);
- }
- // These two should look the same (one patch, one simple path)
- DEF_SIMPLE_GM(patch_alpha_test, canvas, 550, 250) {
- canvas->translate(-75, -75);
- const SkColor colors[SkPatchUtils::kNumCorners] = {
- 0x80FF0000, 0x80FF0000, 0x80FF0000, 0x80FF0000,
- };
- SkPaint paint;
- canvas->drawPatch(gCubics, colors, nullptr, SkBlendMode::kModulate, paint);
- canvas->translate(300, 0);
- SkPath path;
- path.moveTo(gCubics[0]);
- path.cubicTo(gCubics[ 1], gCubics[ 2], gCubics[ 3]);
- path.cubicTo(gCubics[ 4], gCubics[ 5], gCubics[ 6]);
- path.cubicTo(gCubics[ 7], gCubics[ 8], gCubics[ 9]);
- path.cubicTo(gCubics[10], gCubics[11], gCubics[ 0]);
- paint.setColor(colors[0]);
- canvas->drawPath(path, paint);
- }
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