blob: 01f26ba1fa489f8fd99b07e6e030bfacc8852c75 [file] [log] [blame]
// Copyright 2020 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "tools/fiddle/examples.h"
REG_FIDDLE(skpaint_xfer, 576, 640, false, 0) {
static void draw_utf8_string(SkCanvas* c, const char* t, SkScalar x, SkScalar y,
const SkFont& f, const SkPaint& p) {
c->drawTextBlob(SkTextBlob::MakeFromString(t, f).get(), x, y, p);
}
void draw(SkCanvas* canvas) {
SkBlendMode modes[] = {
SkBlendMode::kClear,
SkBlendMode::kSrc,
SkBlendMode::kDst,
SkBlendMode::kSrcOver,
SkBlendMode::kDstOver,
SkBlendMode::kSrcIn,
SkBlendMode::kDstIn,
SkBlendMode::kSrcOut,
SkBlendMode::kDstOut,
SkBlendMode::kSrcATop,
SkBlendMode::kDstATop,
SkBlendMode::kXor,
SkBlendMode::kPlus,
SkBlendMode::kModulate,
SkBlendMode::kScreen,
SkBlendMode::kOverlay,
SkBlendMode::kDarken,
SkBlendMode::kLighten,
SkBlendMode::kColorDodge,
SkBlendMode::kColorBurn,
SkBlendMode::kHardLight,
SkBlendMode::kSoftLight,
SkBlendMode::kDifference,
SkBlendMode::kExclusion,
SkBlendMode::kMultiply,
SkBlendMode::kHue,
SkBlendMode::kSaturation,
SkBlendMode::kColor,
SkBlendMode::kLuminosity,
};
SkRect rect = SkRect::MakeWH(64.0f, 64.0f);
SkPaint stroke, src, dst;
stroke.setStyle(SkPaint::kStroke_Style);
SkFont font(nullptr, 24);
SkPoint srcPoints[2] = {
SkPoint::Make(0.0f, 0.0f),
SkPoint::Make(64.0f, 0.0f)
};
SkColor srcColors[2] = {
SK_ColorMAGENTA & 0x00FFFFFF,
SK_ColorMAGENTA};
src.setShader(SkGradientShader::MakeLinear(
srcPoints, srcColors, nullptr, 2,
SkTileMode::kClamp, 0, nullptr));
SkPoint dstPoints[2] = {
SkPoint::Make(0.0f, 0.0f),
SkPoint::Make(0.0f, 64.0f)
};
SkColor dstColors[2] = {
SK_ColorCYAN & 0x00FFFFFF,
SK_ColorCYAN};
dst.setShader(SkGradientShader::MakeLinear(
dstPoints, dstColors, nullptr, 2,
SkTileMode::kClamp, 0, nullptr));
canvas->clear(SK_ColorWHITE);
size_t N = sizeof(modes) / sizeof(modes[0]);
size_t K = (N - 1) / 3 + 1;
SkASSERT(K * 64 == 640); // tall enough
for (size_t i = 0; i < N; ++i) {
SkAutoCanvasRestore autoCanvasRestore(canvas, true);
canvas->translate(192.0f * (i / K), 64.0f * (i % K));
const char* desc = SkBlendMode_Name(modes[i]);
draw_utf8_string(canvas, desc, 68.0f, 30.0f, font, SkPaint());
canvas->clipRect(SkRect::MakeWH(64.0f, 64.0f));
canvas->drawColor(SK_ColorLTGRAY);
(void)canvas->saveLayer(nullptr, nullptr);
canvas->clear(SK_ColorTRANSPARENT);
canvas->drawPaint(dst);
src.setBlendMode(modes[i]);
canvas->drawPaint(src);
canvas->drawRect(rect, stroke);
}
}
} // END FIDDLE