1 // Copyright 2019 Google LLC. 2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. 3 #include "tools/fiddle/examples.h" 4 // HASH=c26cfae4c42cb445240335cc12a50235 5 REG_FIDDLE(Canvas_const_SkBitmap_const_SkSurfaceProps, 256, 256, true, 0) { draw(SkCanvas *)6 void draw(SkCanvas* ) { 7 SkBitmap bitmap; 8 // create a bitmap 5 wide and 11 high 9 bitmap.allocPixels(SkImageInfo::MakeN32Premul(5, 11)); 10 SkCanvas canvas(bitmap, SkSurfaceProps(0, kUnknown_SkPixelGeometry)); 11 canvas.clear(SK_ColorWHITE); // white is Unpremultiplied, in ARGB order 12 SkPixmap pixmap; // provides guaranteed access to the drawn pixels 13 if (!canvas.peekPixels(&pixmap)) { 14 SkDebugf("peekPixels should never fail.\n"); 15 } 16 const SkPMColor* pixels = pixmap.addr32(); // points to top-left of bitmap 17 SkPMColor pmWhite = pixels[0]; // the Premultiplied format may vary 18 SkPaint paint; // by default, draws black, 12 point text 19 SkFont font; 20 canvas.drawString("!", 1, 10, font, paint); // 1 char at baseline (1, 10) 21 for (int y = 0; y < bitmap.height(); ++y) { 22 for (int x = 0; x < bitmap.width(); ++x) { 23 SkDebugf("%c", *pixels++ == pmWhite ? '-' : 'x'); 24 } 25 SkDebugf("\n"); 26 } 27 } 28 } // END FIDDLE 29