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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.
*/
// 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
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