// Copyright (c) 2010 LearnBoost <tj@learnboost.com>
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#pragma once
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#include <cairo.h>
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#include "CanvasError.h"
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#include <functional>
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#include <nan.h>
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#include <stdint.h> // node < 7 uses libstdc++ on macOS which lacks complete c++11
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#include <v8.h>
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#ifdef HAVE_JPEG
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#include <jpeglib.h>
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#include <jerror.h>
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#endif
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#ifdef HAVE_GIF
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#include <gif_lib.h>
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#if GIFLIB_MAJOR > 5 || GIFLIB_MAJOR == 5 && GIFLIB_MINOR >= 1
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#define GIF_CLOSE_FILE(gif) DGifCloseFile(gif, NULL)
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#else
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#define GIF_CLOSE_FILE(gif) DGifCloseFile(gif)
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#endif
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#endif
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#ifdef HAVE_RSVG
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#include <librsvg/rsvg.h>
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// librsvg <= 2.36.1, identified by undefined macro, needs an extra include
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#ifndef LIBRSVG_CHECK_VERSION
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#include <librsvg/rsvg-cairo.h>
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#endif
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#endif
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using JPEGDecodeL = std::function<uint32_t (uint8_t* const src)>;
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class Image: public Nan::ObjectWrap {
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public:
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char *filename;
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int width, height;
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int naturalWidth, naturalHeight;
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static Nan::Persistent<v8::FunctionTemplate> constructor;
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static void Initialize(Nan::ADDON_REGISTER_FUNCTION_ARGS_TYPE target);
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static NAN_METHOD(New);
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static NAN_GETTER(GetComplete);
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static NAN_GETTER(GetWidth);
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static NAN_GETTER(GetHeight);
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static NAN_GETTER(GetNaturalWidth);
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static NAN_GETTER(GetNaturalHeight);
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static NAN_GETTER(GetDataMode);
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static NAN_SETTER(SetDataMode);
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static NAN_SETTER(SetWidth);
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static NAN_SETTER(SetHeight);
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static NAN_METHOD(GetSource);
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static NAN_METHOD(SetSource);
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inline uint8_t *data(){ return cairo_image_surface_get_data(_surface); }
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inline int stride(){ return cairo_image_surface_get_stride(_surface); }
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static int isPNG(uint8_t *data);
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static int isJPEG(uint8_t *data);
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static int isGIF(uint8_t *data);
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static int isSVG(uint8_t *data, unsigned len);
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static int isBMP(uint8_t *data, unsigned len);
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static cairo_status_t readPNG(void *closure, unsigned char *data, unsigned len);
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inline int isComplete(){ return COMPLETE == state; }
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cairo_surface_t *surface();
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cairo_status_t loadSurface();
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cairo_status_t loadFromBuffer(uint8_t *buf, unsigned len);
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cairo_status_t loadPNGFromBuffer(uint8_t *buf);
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cairo_status_t loadPNG();
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void clearData();
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#ifdef HAVE_RSVG
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cairo_status_t loadSVGFromBuffer(uint8_t *buf, unsigned len);
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cairo_status_t loadSVG(FILE *stream);
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cairo_status_t renderSVGToSurface();
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#endif
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#ifdef HAVE_GIF
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cairo_status_t loadGIFFromBuffer(uint8_t *buf, unsigned len);
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cairo_status_t loadGIF(FILE *stream);
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#endif
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#ifdef HAVE_JPEG
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cairo_status_t loadJPEGFromBuffer(uint8_t *buf, unsigned len);
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cairo_status_t loadJPEG(FILE *stream);
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void jpegToARGB(jpeg_decompress_struct* args, uint8_t* data, uint8_t* src, JPEGDecodeL decode);
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cairo_status_t decodeJPEGIntoSurface(jpeg_decompress_struct *info);
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cairo_status_t decodeJPEGBufferIntoMimeSurface(uint8_t *buf, unsigned len);
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cairo_status_t assignDataAsMime(uint8_t *data, int len, const char *mime_type);
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#endif
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cairo_status_t loadBMPFromBuffer(uint8_t *buf, unsigned len);
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cairo_status_t loadBMP(FILE *stream);
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CanvasError errorInfo;
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void loaded();
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cairo_status_t load();
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Image();
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enum {
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DEFAULT
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, LOADING
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, COMPLETE
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} state;
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enum data_mode_t {
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DATA_IMAGE = 1
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, DATA_MIME = 2
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} data_mode;
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typedef enum {
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UNKNOWN
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, GIF
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, JPEG
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, PNG
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, SVG
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} type;
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static type extension(const char *filename);
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private:
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cairo_surface_t *_surface;
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uint8_t *_data = nullptr;
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int _data_len;
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#ifdef HAVE_RSVG
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RsvgHandle *_rsvg;
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bool _is_svg;
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int _svg_last_width;
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int _svg_last_height;
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#endif
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~Image();
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};
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