| /* |
| * 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, std::size(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, |
| const SkMatrix* localMatrix) { |
| SkPaint paint; |
| paint.setColor(SK_ColorGREEN); |
| |
| const SkBlendMode modes[] = { |
| SkBlendMode::kSrc, |
| SkBlendMode::kDst, |
| SkBlendMode::kColorDodge, |
| }; |
| |
| SkPoint texStorage[4]; |
| const SkPoint* tex = gTexCoords; |
| |
| sk_sp<SkShader> shader; |
| if (img) { |
| SkScalar w = img->width(); |
| SkScalar h = img->height(); |
| shader = img->makeShader(SkSamplingOptions(), localMatrix); |
| 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, nullptr, nullptr); |
| } |
| 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"), nullptr); |
| } |
| DEF_SIMPLE_GM(patch_image_persp, canvas, 1500, 1100) { |
| const SkColor colors[SkPatchUtils::kNumCorners] = { |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN |
| }; |
| SkMatrix localM; |
| localM.reset(); |
| localM[6] = 0.00001f; // force perspective |
| dopatch(canvas, colors, GetResourceAsImage("images/mandrill_128.png"), &localM); |
| } |
| DEF_SIMPLE_GM(patch_alpha, canvas, 1500, 1100) { |
| const SkColor colors[SkPatchUtils::kNumCorners] = { |
| SK_ColorRED, 0x0000FF00, SK_ColorBLUE, 0x00FF00FF, |
| }; |
| dopatch(canvas, colors, nullptr, nullptr); |
| } |
| |
| // 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::kDst, 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); |
| } |
| |