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 unsigned width; 65 unsigned 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); 114 115 /* expects alpha channel in image to be non-premultiplied */ 116 void (*fillbitmap)(struct _gfxdevice*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t*imgcoord2devcoord, gfxcxform_t*cxform); //cxform? tiling? 117 118 void (*fillgradient)(struct _gfxdevice*dev, gfxline_t*line, gfxgradient_t*gradient, gfxgradienttype_t type, gfxmatrix_t*gradcoord2devcoord); //? 119 120 void (*addfont)(struct _gfxdevice*dev, gfxfont_t*font); 121 122 void (*drawchar)(struct _gfxdevice*dev, gfxfont_t*font, int glyph, gfxcolor_t*color, gfxmatrix_t*matrix); 123 124 void (*drawlink)(struct _gfxdevice*dev, gfxline_t*line, const char*action, const char*text); 125 126 void (*endpage)(struct _gfxdevice*dev); 127 128 const char* (*geterror)(); 129 130 gfxresult_t* (*finish)(struct _gfxdevice*dev); 131 132 void* internal; 133 } gfxdevice_t; 134 135 #ifdef __cplusplus 136 } 137 #endif 138 139 #endif //__gfxdevice_h__ 140