| |
| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| // This test only works with the GPU backend. |
| |
| #include "gm.h" |
| |
| #if SK_SUPPORT_GPU |
| |
| #include "GrContext.h" |
| #include "GrTest.h" |
| #include "SkPatch.h" |
| |
| static void draw_control_points(SkCanvas* canvas, const SkPatch& patch) { |
| //draw control points |
| SkPaint paint; |
| SkPoint bottom[SkPatch::kNumPtsCubic]; |
| patch.getBottomPoints(bottom); |
| SkPoint top[SkPatch::kNumPtsCubic]; |
| patch.getTopPoints(top); |
| SkPoint left[SkPatch::kNumPtsCubic]; |
| patch.getLeftPoints(left); |
| SkPoint right[SkPatch::kNumPtsCubic]; |
| patch.getRightPoints(right); |
| |
| paint.setColor(SK_ColorBLACK); |
| paint.setStrokeWidth(0.5); |
| 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); |
| } |
| |
| namespace skiagm { |
| /** |
| * This GM draws a SkPatch. |
| */ |
| class SkPatchGM : public GM { |
| |
| public: |
| SkPatchGM() { |
| this->setBGColor(0xFFFFFFFF); |
| } |
| |
| protected: |
| virtual SkString onShortName() SK_OVERRIDE { |
| return SkString("patch_primitive"); |
| } |
| |
| virtual SkISize onISize() SK_OVERRIDE { |
| return SkISize::Make(800, 800); |
| } |
| |
| virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| return kSkipTiled_Flag; |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| |
| SkPaint paint; |
| |
| // The order of the colors and points is clockwise starting at upper-left corner. |
| SkColor colors[SkPatch::kNumColors] = { |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN |
| }; |
| SkPoint points[SkPatch::kNumCtrlPts] = { |
| //top points |
| {50,50},{75,20},{125,80}, {150,50}, |
| //right points |
| {120,75},{180,125}, |
| //bottom points |
| {150,150},{125,120},{75,180},{50,150}, |
| //left points |
| {20,125},{80,75} |
| }; |
| |
| SkPatch patch(points, colors); |
| static const SkScalar kScale = 0.5f; |
| canvas->translate(100, 100); |
| canvas->save(); |
| for (SkScalar x = 0; x < 4; x++) { |
| canvas->save(); |
| canvas->scale(kScale * (x + 1), kScale * (x + 1)); |
| canvas->translate(x * 100, 0); |
| canvas->drawPatch(patch, paint); |
| draw_control_points(canvas, patch); |
| canvas->restore(); |
| } |
| |
| canvas->translate(0, 270); |
| |
| static const SkScalar kSkew = 0.2f; |
| for (SkScalar x = 0; x < 4; x++) { |
| canvas->save(); |
| canvas->scale(kScale * (x + 1), kScale * (x + 1)); |
| canvas->translate(x * 100, 0); |
| canvas->skew(kSkew * (x + 1), kSkew * (x + 1)); |
| canvas->drawPatch(patch, paint); |
| draw_control_points(canvas, patch); |
| canvas->restore(); |
| } |
| canvas->restore(); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| DEF_GM(return SkNEW(SkPatchGM); ) |
| |
| } |
| |
| #endif |