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235 lines
7.5 KiB
235 lines
7.5 KiB
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkBlurMask.h"
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#include "SkCanvas.h"
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#include "SkMaskFilter.h"
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#include "SkPath.h"
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#include "SkTo.h"
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#include "gm.h"
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#define STROKE_WIDTH SkIntToScalar(10)
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typedef void (*Proc)(SkCanvas*, const SkRect&, const SkPaint&);
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static void fill_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
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canvas->drawRect(r, p);
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}
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static void draw_donut(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
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SkRect rect;
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SkPath path;
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rect = r;
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rect.outset(STROKE_WIDTH/2, STROKE_WIDTH/2);
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path.addRect(rect);
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rect = r;
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rect.inset(STROKE_WIDTH/2, STROKE_WIDTH/2);
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path.addRect(rect);
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path.setFillType(SkPath::kEvenOdd_FillType);
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canvas->drawPath(path, p);
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}
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static void draw_donut_skewed(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
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SkRect rect;
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SkPath path;
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rect = r;
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rect.outset(STROKE_WIDTH/2, STROKE_WIDTH/2);
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path.addRect(rect);
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rect = r;
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rect.inset(STROKE_WIDTH/2, STROKE_WIDTH/2);
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rect.offset(7, -7);
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path.addRect(rect);
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path.setFillType(SkPath::kEvenOdd_FillType);
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canvas->drawPath(path, p);
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}
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#include "SkGradientShader.h"
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/*
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* Spits out a dummy gradient to test blur with shader on paint
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*/
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static sk_sp<SkShader> make_radial() {
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SkPoint pts[2] = {
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{ 0, 0 },
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{ SkIntToScalar(100), SkIntToScalar(100) }
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};
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SkShader::TileMode tm = SkShader::kClamp_TileMode;
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const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, };
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const SkScalar pos[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
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SkMatrix scale;
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scale.setScale(0.5f, 0.5f);
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scale.postTranslate(25.f, 25.f);
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SkPoint center0, center1;
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center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
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SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
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return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
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center0, (pts[1].fX - pts[0].fX) / 2,
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colors, pos, SK_ARRAY_COUNT(colors), tm,
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0, &scale);
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}
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typedef void (*PaintProc)(SkPaint*, SkScalar width);
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class BlurRectGM : public skiagm::GM {
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sk_sp<SkMaskFilter> fMaskFilters[kLastEnum_SkBlurStyle + 1];
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SkString fName;
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SkAlpha fAlpha;
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public:
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BlurRectGM(const char name[], U8CPU alpha)
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: fName(name)
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, fAlpha(SkToU8(alpha)) {
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}
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protected:
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void onOnceBeforeDraw() override {
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for (int i = 0; i <= kLastEnum_SkBlurStyle; ++i) {
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fMaskFilters[i] = SkMaskFilter::MakeBlur((SkBlurStyle)i,
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SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(STROKE_WIDTH/2)));
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}
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}
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SkString onShortName() override {
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return fName;
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}
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SkISize onISize() override {
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return SkISize::Make(860, 820);
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->translate(STROKE_WIDTH*3/2, STROKE_WIDTH*3/2);
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SkRect r = { 0, 0, 100, 50 };
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SkScalar scales[] = { SK_Scalar1, 0.6f };
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for (size_t s = 0; s < SK_ARRAY_COUNT(scales); ++s) {
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canvas->save();
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for (size_t f = 0; f < SK_ARRAY_COUNT(fMaskFilters); ++f) {
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SkPaint paint;
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paint.setMaskFilter(fMaskFilters[f]);
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paint.setAlpha(fAlpha);
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SkPaint paintWithRadial = paint;
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paintWithRadial.setShader(make_radial());
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constexpr Proc procs[] = {
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fill_rect, draw_donut, draw_donut_skewed
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};
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canvas->save();
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canvas->scale(scales[s], scales[s]);
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this->drawProcs(canvas, r, paint, false, procs, SK_ARRAY_COUNT(procs));
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canvas->translate(r.width() * 4/3, 0);
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this->drawProcs(canvas, r, paintWithRadial, false, procs, SK_ARRAY_COUNT(procs));
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canvas->translate(r.width() * 4/3, 0);
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this->drawProcs(canvas, r, paint, true, procs, SK_ARRAY_COUNT(procs));
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canvas->translate(r.width() * 4/3, 0);
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this->drawProcs(canvas, r, paintWithRadial, true, procs, SK_ARRAY_COUNT(procs));
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canvas->restore();
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canvas->translate(0, SK_ARRAY_COUNT(procs) * r.height() * 4/3 * scales[s]);
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}
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canvas->restore();
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canvas->translate(4 * r.width() * 4/3 * scales[s], 0);
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}
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}
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private:
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void drawProcs(SkCanvas* canvas, const SkRect& r, const SkPaint& paint,
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bool doClip, const Proc procs[], size_t procsCount) {
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SkAutoCanvasRestore acr(canvas, true);
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for (size_t i = 0; i < procsCount; ++i) {
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if (doClip) {
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SkRect clipRect(r);
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clipRect.inset(STROKE_WIDTH/2, STROKE_WIDTH/2);
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canvas->save();
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canvas->clipRect(r);
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}
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procs[i](canvas, r, paint);
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if (doClip) {
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canvas->restore();
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}
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canvas->translate(0, r.height() * 4/3);
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}
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}
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private:
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typedef GM INHERITED;
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};
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DEF_SIMPLE_GM(blurrect_gallery, canvas, 1200, 1024) {
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const int fGMWidth = 1200;
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const int fPadding = 10;
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const int fMargin = 100;
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const int widths[] = {25, 5, 5, 100, 150, 25};
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const int heights[] = {100, 100, 5, 25, 150, 25};
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const SkBlurStyle styles[] = {kNormal_SkBlurStyle, kInner_SkBlurStyle, kOuter_SkBlurStyle};
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const float radii[] = {20, 5, 10};
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canvas->translate(50,20);
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int cur_x = 0;
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int cur_y = 0;
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int max_height = 0;
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for (size_t i = 0 ; i < SK_ARRAY_COUNT(widths) ; i++) {
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int width = widths[i];
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int height = heights[i];
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SkRect r;
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r.setWH(SkIntToScalar(width), SkIntToScalar(height));
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SkAutoCanvasRestore autoRestore(canvas, true);
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for (size_t j = 0 ; j < SK_ARRAY_COUNT(radii) ; j++) {
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float radius = radii[j];
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for (size_t k = 0 ; k < SK_ARRAY_COUNT(styles) ; k++) {
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SkBlurStyle style = styles[k];
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SkMask mask;
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if (!SkBlurMask::BlurRect(SkBlurMask::ConvertRadiusToSigma(radius),
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&mask, r, style)) {
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continue;
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}
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SkAutoMaskFreeImage amfi(mask.fImage);
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SkBitmap bm;
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bm.installMaskPixels(mask);
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if (cur_x + bm.width() >= fGMWidth - fMargin) {
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cur_x = 0;
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cur_y += max_height + fPadding;
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max_height = 0;
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}
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canvas->save();
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canvas->translate((SkScalar)cur_x, (SkScalar)cur_y);
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canvas->translate(-(bm.width() - r.width())/2, -(bm.height()-r.height())/2);
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canvas->drawBitmap(bm, 0.f, 0.f, nullptr);
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canvas->restore();
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cur_x += bm.width() + fPadding;
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if (bm.height() > max_height)
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max_height = bm.height();
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}
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}
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new BlurRectGM("blurrects", 0xFF);)
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