skia2/docs/examples/Surface_003.cpp

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// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "fiddle/examples.h"
// HASH=c6197d204ef9e4ccfb583242651fb2a7
REG_FIDDLE(Surface_003, 256, 256, true, 0) {
void draw(SkCanvas* ) {
SkImageInfo info = SkImageInfo::MakeN32Premul(3, 3);
sk_sp<SkSurface> surface(SkSurface::MakeRaster(info));
SkCanvas* canvas = surface->getCanvas();
canvas->clear(SK_ColorWHITE);
SkPixmap pixmap;
if (surface->peekPixels(&pixmap)) {
const uint32_t* colorPtr = pixmap.addr32();
SkPMColor pmWhite = colorPtr[0];
SkPaint paint;
canvas->drawPoint(1, 1, paint);
canvas->flush(); // ensure that point was drawn
for (int y = 0; y < info.height(); ++y) {
for (int x = 0; x < info.width(); ++x) {
SkDebugf("%c", colorPtr[x] == pmWhite ? '-' : 'x');
}
colorPtr += info.width();
SkDebugf("\n");
}
}
}
} // END FIDDLE