lib/gfxdevice.h

   1 #ifndef __gfxdevice_h__
   2 #define __gfxdevice_h__
   3
   4 #ifdef __cplusplus
   5 extern "C" {
   6 #endif
   7
   8 #define GFX_SUBPIXEL 2560
   9
  10 typedef double gfxcoord_t;
  11
  12 typedef enum {gfx_moveTo, gfx_lineTo, gfx_splineTo} gfx_linetype;
  13 typedef enum {gfx_joinMiter, gfx_joinRound, gfx_joinBevel} gfx_joinType;
  14 typedef enum {gfx_capButt, gfx_capRound, gfx_capSquare} gfx_capType;
  15
  16 typedef struct _gfxline
  17 {
  18     gfx_linetype type;
  19     gfxcoord_t x,y;
  20     gfxcoord_t sx,sy;
  21     struct _gfxline*next; /*NULL=end*/
  22 } gfxline_t;
  23
  24 typedef struct _gfxglyph
  25 {
  26     gfxline_t*line;
  27     gfxcoord_t advance;
  28
  29     int unicode; // array?
  30     const char*name;
  31 } gfxglyph_t;
  32
  33 typedef struct _gfxfont
  34 {
  35     const char*id;
  36     int num_glyphs;
  37     int max_unicode;
  38
  39     double ascent,descent;
  40
  41     gfxglyph_t*glyphs;
  42     int* unicode2glyph;
  43 } gfxfont_t;
  44
  45 typedef struct _gfxcolor
  46 {
  47     unsigned char a;
  48     unsigned char r;
  49     unsigned char g;
  50     unsigned char b;
  51 } gfxcolor_t;
  52
  53 typedef struct _gfxmatrix
  54 {
  55     double m00,m10,tx;
  56     double m01,m11,ty;
  57 } gfxmatrix_t;
  58
  59 typedef struct _gfximage
  60 {
  61     /* if the data contains an alpha layer (a != 255), the
  62        r,g,b values will have to be premultiplied */
  63     gfxcolor_t*data;
  64     int width;
  65     int height;
  66 } gfximage_t;
  67
  68 /* gradients: A radial gradient will start at 0,0 and have a radius of 1,0
  69               An axial gradient starts at -1,0 and ends at 1,0
  70  */
  71 typedef enum {gfxgradient_radial, gfxgradient_linear} gfxgradienttype_t;
  72 typedef struct _gfxgradient
  73 {
  74     gfxcolor_t color;
  75     float pos; // 0.0 - 1.0
  76     struct _gfxgradient*next; //NULL=end
  77 } gfxgradient_t;
  78
  79 typedef struct _gfxcxform
  80 {
  81     float rr,rg,rb,ra, tr;
  82     float gr,gg,gb,ga, tg;
  83     float br,bg,bb,ba, tb;
  84     float ar,ag,ab,aa, ta;
  85 } gfxcxform_t;
  86
  87 typedef struct _gfxbbox
  88 {
  89     gfxcoord_t xmin, ymin, xmax, ymax;
  90 } gfxbbox_t;
  91
  92 typedef struct _gfxresult
  93 {
  94     void (*write)(struct _gfxresult*gfx, int filedesc);
  95     int (*save)(struct _gfxresult*gfx, const char*filename);
  96     void* (*get)(struct _gfxresult*gfx, const char*name);
  97     void (*destroy)(struct _gfxresult*gfx);
  98
  99     void*internal;
 100 } gfxresult_t;
 101
 102 typedef struct _gfxdevice
 103 {
 104     const char* name; // gfx device name
 105
 106     int (*setparameter)(struct _gfxdevice*dev, const char*key, const char*value);
 107
 108     void (*startpage)(struct _gfxdevice*dev, int width, int height);
 109
 110     void (*startclip)(struct _gfxdevice*dev, gfxline_t*line);
 111     void (*endclip)(struct _gfxdevice*dev);
 112     void (*stroke)(struct _gfxdevice*dev, gfxline_t*line, gfxcoord_t width, gfxcolor_t*color, gfx_capType cap_style, gfx_joinType joint_style, gfxcoord_t miterLimit);
 113     void (*fill)(struct _gfxdevice*dev, gfxline_t*line, gfxcolor_t*color);
 114     void (*fillbitmap)(struct _gfxdevice*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t*imgcoord2devcoord, gfxcxform_t*cxform); //cxform? tiling?
 115     void (*fillgradient)(struct _gfxdevice*dev, gfxline_t*line, gfxgradient_t*gradient, gfxgradienttype_t type, gfxmatrix_t*gradcoord2devcoord); //?
 116
 117     /* deprecated */ void (*addfont)(struct _gfxdevice*dev, gfxfont_t*font);
 118
 119     void (*drawchar)(struct _gfxdevice*dev, gfxfont_t*font, int glyph, gfxcolor_t*color, gfxmatrix_t*matrix);
 120
 121     void (*drawlink)(struct _gfxdevice*dev, gfxline_t*line, const char*action);
 122
 123     void (*endpage)(struct _gfxdevice*dev);
 124
 125     const char* (*geterror)();
 126
 127     gfxresult_t* (*finish)(struct _gfxdevice*dev);
 128
 129     void* internal;
 130 } gfxdevice_t;
 131
 132 #ifdef __cplusplus
 133 }
 134 #endif
 135
 136 #endif //__gfxdevice_h__