lib/gfxfilter.h

   1 /* gfxfilter.h
   2
   3    Part of the swftools package.
   4
   5    Copyright (c) 2010 Matthias Kramm <kramm@quiss.org>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  20
  21 #ifndef __gfxfilter_h__
  22 #define __gfxfilter_h__
  23
  24 #include "gfxdevice.h"
  25 #include "types.h"
  26
  27 #ifdef __cplusplus
  28 extern "C" {
  29 #endif
  30
  31 typedef enum {gfxfilter_none, gfxfilter_onepass, gfxfilter_twopass} gfxfiltertype_t;
  32
  33 typedef struct _gfxfilterbase
  34 {
  35     gfxfiltertype_t type;
  36 } gfxfilterbase_t;
  37
  38 typedef struct _gfxfilter
  39 {
  40     gfxfiltertype_t type;
  41     int num_passes;
  42     const char*name;
  43
  44     int pass;
  45
  46     int (*setparameter)(struct _gfxfilter*in, const char*key, const char*value, struct _gfxdevice*out);
  47     void (*startpage)(struct _gfxfilter*in, int width, int height, struct _gfxdevice*out);
  48     void (*startclip)(struct _gfxfilter*in, gfxline_t*line, struct _gfxdevice*out);
  49     void (*endclip)(struct _gfxfilter*in, struct _gfxdevice*out);
  50     void (*stroke)(struct _gfxfilter*in, gfxline_t*line, gfxcoord_t width, gfxcolor_t*color, gfx_capType cap_style, gfx_joinType joint_style, gfxcoord_t miterLimit, struct _gfxdevice*out);
  51     void (*fill)(struct _gfxfilter*in, gfxline_t*line, gfxcolor_t*color, struct _gfxdevice*out);
  52     void (*fillbitmap)(struct _gfxfilter*in, gfxline_t*line, gfximage_t*img, gfxmatrix_t*imgcoord2devcoord, gfxcxform_t*cxform, struct _gfxdevice*out); //cxform? tiling?
  53     void (*fillgradient)(struct _gfxfilter*in, gfxline_t*line, gfxgradient_t*gradient, gfxgradienttype_t type, gfxmatrix_t*gradcoord2devcoord, struct _gfxdevice*out); //?
  54     void (*addfont)(struct _gfxfilter*in, gfxfont_t*font, struct _gfxdevice*out);
  55     void (*drawchar)(struct _gfxfilter*in, gfxfont_t*font, int glyph, gfxcolor_t*color, gfxmatrix_t*matrix, struct _gfxdevice*out);
  56     void (*drawlink)(struct _gfxfilter*in, gfxline_t*line, const char*action, struct _gfxdevice*out);
  57     void (*endpage)(struct _gfxfilter*in, struct _gfxdevice*out);
  58     gfxresult_t* (*finish)(struct _gfxfilter*in, struct _gfxdevice*out);
  59
  60     void (*dealloc)(struct _gfxfilter*f);
  61
  62     void* internal;
  63 } gfxfilter_t;
  64
  65 typedef struct _gfxtwopassfilter
  66 {
  67     gfxfiltertype_t type;
  68     gfxfilter_t pass1;
  69     gfxfilter_t pass2;
  70 } gfxtwopassfilter_t;
  71
  72 gfxdevice_t*gfxfilter_apply(gfxfilter_t*filter, gfxdevice_t*dev);
  73 gfxdevice_t*gfxtwopassfilter_apply(gfxtwopassfilter_t*filter, gfxdevice_t*dev);
  74
  75 typedef struct _gfxfilterchain {
  76     gfxfilterbase_t*filter;
  77     struct _gfxfilterchain*next;
  78 } gfxfilterchain_t;
  79
  80 gfxfilterchain_t* gfxfilterchain_parse(const char*filterexpr);
  81 gfxdevice_t* gfxfilterchain_apply(gfxfilterchain_t*chain, gfxdevice_t*dev);
  82 void gfxfilterchain_destroy(gfxfilterchain_t*chain);
  83
  84 #define wrap_filter(dev, name, args...) \
  85     {gfxfilter_t f_##name; \
  86      gfxfilter_##name##_init(&f_##name, ## args); \
  87      dev = gfxfilter_apply(&f_##name, dev); \
  88     }
  89
  90 #define wrap_filter2(dev, name, args...) \
  91     {gfxtwopassfilter_t f_##name; \
  92      gfxtwopassfilter_##name##_init(&f_##name, ## args); \
  93      dev = gfxtwopassfilter_apply(&f_##name, dev); \
  94     }
  95
  96 /* known filters */
  97 void gfxfilter_maketransparent_init(gfxfilter_t*f, U8 alpha);
  98 void gfxtwopassfilter_remove_font_transforms_init(gfxtwopassfilter_t*f);
  99 void gfxtwopassfilter_one_big_font_init(gfxtwopassfilter_t*f);
 100 void gfxtwopassfilter_vectors_to_glyphs_init(gfxtwopassfilter_t*f);
 101
 102
 103 #ifdef __cplusplus
 104 }
 105 #endif
 106
 107 #endif //__gfxfilter_h__