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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, SkPatch& patch, SkPaint& paint) {
//draw control points
SkPaint copy(paint);
SkPoint bottom[4];
patch.getBottomPoints(bottom);
SkPoint top[4];
patch.getTopPoints(top);
SkPoint left[4];
patch.getLeftPoints(left);
SkPoint right[4];
patch.getRightPoints(right);
copy.setColor(SK_ColorBLACK);
copy.setStrokeWidth(0.5);
SkPoint corners[4] = { bottom[0], bottom[3], top[0], top[3] };
canvas->drawPoints(SkCanvas::kLines_PointMode, 4, bottom, copy);
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, bottom+1, copy);
canvas->drawPoints(SkCanvas::kLines_PointMode, 4, top, copy);
canvas->drawPoints(SkCanvas::kLines_PointMode, 4, left, copy);
canvas->drawPoints(SkCanvas::kLines_PointMode, 4, right, copy);
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, top+1, copy);
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, left+1, copy);
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, right+1, copy);
copy.setStrokeWidth(2);
copy.setColor(SK_ColorRED);
canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, corners, copy);
copy.setColor(SK_ColorBLUE);
canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, bottom+1, copy);
copy.setColor(SK_ColorCYAN);
canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, top+1, copy);
copy.setColor(SK_ColorYELLOW);
canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, left+1, copy);
copy.setColor(SK_ColorGREEN);
canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, right+1, copy);
}
static void draw_random_patch(SkPoint points[12], SkColor colors[4], SkCanvas* canvas,
SkPaint& paint, SkRandom* rnd) {
SkPoint ptsCpy[12];
memcpy(ptsCpy, points, 12 * sizeof(SkPoint));
for (int i = 0; i < 5; i++) {
int index = rnd->nextRangeU(0, 11);
SkScalar dx = rnd->nextRangeScalar(-50, 50), dy = rnd->nextRangeScalar(-50, 50);
ptsCpy[index].offset(dx, dy);
}
SkPatch patch(ptsCpy, colors);
canvas->drawPatch(patch, paint);
draw_control_points(canvas, patch, 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 | kSkipPipe_Flag | kSkipPicture_Flag;
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
SkPaint paint;
SkColor colors[4] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN
};
SkPoint points[12] = {
{50,50},{75,20},{125,80}, {150,50},
{120,75},{180,125},{150,150},
{125,120},{75,180},{50,150},
{20,125},{80,75}
};
SkRandom rnd;
SkScalar scale = 0.5f;
canvas->save();
for (SkScalar x = 0; x < 4; x++) {
canvas->save();
canvas->scale(scale * (x + 1), scale * (x + 1));
canvas->translate(x * 100, 0);
draw_random_patch(points, colors, canvas, paint, &rnd);
canvas->restore();
}
canvas->translate(0, 270);
SkScalar skew = 0.1f;
for (SkScalar x = 0; x < 4; x++) {
canvas->save();
canvas->scale(scale * (x + 1), scale * (x + 1));
canvas->skew(skew * (x + 1), skew * (x + 1));
canvas->translate(x * 100, 0);
draw_random_patch(points, colors, canvas, paint, &rnd);
canvas->restore();
}
canvas->restore();
}
private:
typedef GM INHERITED;
};
DEF_GM(return SkNEW(SkPatchGM); )
}
#endif
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