1/*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef sk_tool_utils_DEFINED
9#define sk_tool_utils_DEFINED
10
11#include "SkColor.h"
12#include "SkImageEncoder.h"
13#include "SkImageInfo.h"
14#include "SkPixelSerializer.h"
15#include "SkTypeface.h"
16
17class SkBitmap;
18class SkCanvas;
19class SkPaint;
20class SkShader;
21class SkTestFont;
22class SkTextBlobBuilder;
23
24namespace sk_tool_utils {
25
26    const char* colortype_name(SkColorType);
27
28    /**
29     * Sets the paint to use a platform-independent text renderer.
30     */
31    void set_portable_typeface(SkPaint* paint, const char* name = NULL,
32                               SkTypeface::Style style = SkTypeface::kNormal);
33    SkTypeface* create_portable_typeface(const char* name, SkTypeface::Style style);
34    void report_used_chars();
35
36    /**
37     *  Call canvas->writePixels() by using the pixels from bitmap, but with an info that claims
38     *  the pixels are colorType + alphaType
39     */
40    void write_pixels(SkCanvas*, const SkBitmap&, int x, int y, SkColorType, SkAlphaType);
41
42    // private to sk_tool_utils
43    SkTypeface* create_font(const char* name, SkTypeface::Style );
44    SkTypeface* resource_font(const char* name, SkTypeface::Style );
45
46    /** Returns a newly created CheckerboardShader. */
47    SkShader* create_checkerboard_shader(SkColor c1, SkColor c2, int size);
48
49    /** Draw a checkerboard pattern in the current canvas, restricted to
50        the current clip, using SkXfermode::kSrc_Mode. */
51    void draw_checkerboard(SkCanvas* canvas,
52                           SkColor color1,
53                           SkColor color2,
54                           int size);
55
56    /** A default checkerboard. */
57    inline void draw_checkerboard(SkCanvas* canvas) {
58        sk_tool_utils::draw_checkerboard(canvas, 0xFF999999, 0xFF666666, 8);
59    }
60
61    // Encodes to PNG, unless there is already encoded data, in which case that gets
62    // used.
63    class PngPixelSerializer : public SkPixelSerializer {
64    public:
65        bool onUseEncodedData(const void*, size_t) override { return true; }
66        SkData* onEncodePixels(const SkImageInfo& info, const void* pixels,
67                               size_t rowBytes) override {
68            return SkImageEncoder::EncodeData(info, pixels, rowBytes,
69                                              SkImageEncoder::kPNG_Type, 100);
70        }
71    };
72
73    // A helper for inserting a drawtext call into a SkTextBlobBuilder
74    void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint,
75                          SkScalar x, SkScalar y);
76
77}  // namespace sk_tool_utils
78
79#endif  // sk_tool_utils_DEFINED
80