Home | History | Annotate | Download | only in tools 
      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 
     17 class SkBitmap;
     18 class SkCanvas;
     19 class SkPaint;
     20 class SkShader;
     21 class SkTestFont;
     22 class SkTextBlobBuilder;
     23 
     24 namespace 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