gtk2_ardour/rgb_macros.h

   1 /*
   2     Copyright (C) 2000 EMC Capital Management, Inc.
   3
   4     Developed by Jon Trowbridge <trow@gnu.org> and
   5     Havoc Pennington <hp@pobox.com>.
   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., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21 */
  22
  23 #ifndef __gtk_ardour_rgb_macros_h__
  24 #define __gtk_ardour_rgb_macros_h__
  25
  26 /*
  27   Some convenient macros for drawing into an RGB buffer.
  28   Beware of side effects, code-bloat, and all of the other classic
  29   cpp-perils...
  30 */
  31
  32 #define RGB_TO_UINT(r,g,b) ((((guint)(r))<<16)|(((guint)(g))<<8)|((guint)(b)))
  33 #define RGB_TO_RGBA(x,a) (((x) << 8) | ((((guint)a) & 0xff)))
  34 #define RGBA_TO_UINT(r,g,b,a) RGB_TO_RGBA(RGB_TO_UINT(r,g,b), a)
  35 #define RGB_WHITE  RGB_TO_UINT(0xff, 0xff, 0xff)
  36 #define RGB_BLACK  RGB_TO_UINT(0x00, 0x00, 0x00)
  37 #define RGB_RED    RGB_TO_UINT(0xff, 0x00, 0x00)
  38 #define RGB_GREEN  RGB_TO_UINT(0x00, 0xff, 0x00)
  39 #define RGB_BLUE   RGB_TO_UINT(0x00, 0x00, 0xff)
  40 #define RGB_YELLOW RGB_TO_UINT(0xff, 0xff, 0x00)
  41 #define RGB_VIOLET RGB_TO_UINT(0xff, 0x00, 0xff)
  42 #define RGB_CYAN   RGB_TO_UINT(0x00, 0xff, 0xff)
  43 #define RGBA_WHITE  RGB_TO_RGBA(RGB_WHITE, 0xff)
  44 #define RGBA_BLACK  RGB_TO_RGBA(RGB_BLACK, 0xff)
  45 #define RGBA_RED    RGB_TO_RGBA(RGB_RED, 0xff)
  46 #define RGBA_GREEN  RGB_TO_RGBA(RGB_GREEN, 0xff)
  47 #define RGBA_BLUE   RGB_TO_RGBA(RGB_BLUE, 0xff)
  48 #define RGBA_YELLOW RGB_TO_RGBA(RGB_YELLOW, 0xff)
  49 #define RGBA_VIOLET RGB_TO_RGBA(RGB_VIOLET, 0xff)
  50 #define RGBA_CYAN   RGB_TO_RGBA(RGB_CYAN, 0xff)
  51 #define RGB_GREY(x) RGB_TO_UINT(x,x,x)
  52 #define RGBA_GREY(x) RGB_TO_RGBA(RGB_GREY(x), 0xff)
  53 #define UINT_RGBA_R(x) (((guint)(x))>>24)
  54 #define UINT_RGBA_G(x) ((((guint)(x))>>16)&0xff)
  55 #define UINT_RGBA_B(x) ((((guint)(x))>>8)&0xff)
  56 #define UINT_RGBA_A(x) (((guint)(x))&0xff)
  57 #define UINT_RGBA_R_FLT(x) ((((guint)(x))>>24)/255.0)
  58 #define UINT_RGBA_G_FLT(x) (((((guint)(x))>>16)&0xff)/255.0)
  59 #define UINT_RGBA_B_FLT(x) (((((guint)(x))>>8)&0xff)/255.0)
  60 #define UINT_RGBA_A_FLT(x) ((((guint)(x))&0xff)/255.0)
  61 #define UINT_RGBA_CHANGE_R(x, r) (((x)&(~(0xff<<24)))|(((r)&0xff)<<24))
  62 #define UINT_RGBA_CHANGE_G(x, g) (((x)&(~(0xff<<16)))|(((g)&0xff)<<16))
  63 #define UINT_RGBA_CHANGE_B(x, b) (((x)&(~(0xff<<8)))|(((b)&0xff)<<8))
  64 #define UINT_RGBA_CHANGE_A(x, a) (((x)&(~0xff))|((a)&0xff))
  65 #define UINT_TO_RGB(u,r,g,b) \
  66 { (*(r)) = ((u)>>16)&0xff; (*(g)) = ((u)>>8)&0xff; (*(b)) = (u)&0xff; }
  67 #define UINT_TO_RGBA(u,r,g,b,a) \
  68 { UINT_TO_RGB(((u)>>8),r,g,b); (*(a)) = (u)&0xff; }
  69 #define MONO_INTERPOLATE(v1, v2, t) ((gint)rint((v2)*(t)+(v1)*(1-(t))))
  70 #define UINT_INTERPOLATE(c1, c2, t) \
  71   RGBA_TO_UINT( MONO_INTERPOLATE(UINT_RGBA_R(c1), UINT_RGBA_R(c2), t), \
  72                 MONO_INTERPOLATE(UINT_RGBA_G(c1), UINT_RGBA_G(c2), t), \
  73                 MONO_INTERPOLATE(UINT_RGBA_B(c1), UINT_RGBA_B(c2), t), \
  74                 MONO_INTERPOLATE(UINT_RGBA_A(c1), UINT_RGBA_A(c2), t) )
  75 #define PIXEL_RGB(p, r, g, b) \
  76 {((guchar*)(p))[0]=(r); ((guchar*)(p))[1]=(g); ((guchar*)(p))[2]=(b);}
  77 #define PIXEL_RGBA(p, r, g, b, a) \
  78 { if ((a)>=0xff) { PIXEL_RGB(p,r,g,b) } \
  79   else if ((a)>0) { \
  80     guint pixel_tmp; \
  81     pixel_tmp = ((guchar*)(p))[0]; \
  82     ((guchar*)(p))[0] = pixel_tmp + ((((r)-pixel_tmp)*(a)+0x80) >> 8); \
  83     pixel_tmp = ((guchar*)(p))[1]; \
  84     ((guchar*)(p))[1] = pixel_tmp + ((((g)-pixel_tmp)*(a)+0x80) >> 8); \
  85     pixel_tmp = ((guchar*)(p))[2]; \
  86     ((guchar*)(p))[2] = pixel_tmp + ((((b)-pixel_tmp)*(a)+0x80) >> 8); }}
  87 #define PIXEL_RGB_UINT(p, i) \
  88 UINT_TO_RGB((i), ((guchar*)p), ((guchar*)p)+1, ((guchar*)p)+2)
  89 #define PIXEL_RGBA_UINT(p, i) \
  90   PIXEL_RGBA((p), ((i)>>24)&0xff, ((i)>>16)&0xff, ((i)>>8)&0xff, (i)&0xff)
  91 #define PIXEL_BLACK(p) PIXEL_RGB(p,0,0,0)
  92 #define PIXEL_WHITE(p) PIXEL_RGB(p,0xff,0xff,0xff)
  93 #define PIXEL_GREY(p,g) PIXEL_RGB(p,g,g,g)
  94 #define PIXEL_GREYA(p,g,a) PIXEL_RGBA(p,g,g,g,a)
  95 #define BUF_PTR(inbuf, ptx, pty) \
  96  ((inbuf)->buf + 3*((ptx)-(inbuf)->rect.x0) + (inbuf)->buf_rowstride*((pty)-(inbuf)->rect.y0))
  97 #define BUF_INBOUNDS_X(inbuf, ptx) \
  98 ((inbuf)->rect.x0 <= (ptx) && (ptx) < (inbuf)->rect.x1)
  99 #define BUF_INBOUNDS_Y(inbuf, pty) \
 100 ((inbuf)->rect.y0 <= (pty) && (pty) < (inbuf)->rect.y1)
 101 #define PAINT_DOT(inbuf, colr, colg, colb,ptx, pty) \
 102 { \
 103   guchar* pd_p; \
 104   if (BUF_INBOUNDS_X(inbuf, ptx) && BUF_INBOUNDS_Y(inbuf, pty)) { \
 105     pd_p = BUF_PTR(inbuf, ptx, pty); \
 106     PIXEL_RGB(pd_p, (colr), (colg), (colb)); \
 107   } \
 108 }
 109 #define FAST_PAINT_DOT(inbuf, colr, colg, colb,ptx, pty) \
 110 { \
 111   guchar* pd_p; \
 112   pd_p = BUF_PTR(inbuf, ptx, pty); \
 113   PIXEL_RGB(pd_p, (colr), (colg), (colb)); \
 114 }
 115 #define PAINT_DOTA(inbuf, colr, colg, colb, cola, ptx, pty) \
 116 { \
 117   guchar* pd_p; \
 118   if (BUF_INBOUNDS_X(inbuf, ptx) && BUF_INBOUNDS_Y(inbuf, pty)) { \
 119     pd_p = BUF_PTR(inbuf, ptx, pty); \
 120     PIXEL_RGBA(pd_p, (colr), (colg), (colb), (cola)); \
 121   } \
 122 }
 123 #define FAST_PAINT_DOTA(inbuf, colr, colg, colb, cola, ptx, pty) \
 124 { \
 125   guchar* pd_p; \
 126   pd_p = BUF_PTR(inbuf, ptx, pty); \
 127   PIXEL_RGBA(pd_p, (colr), (colg), (colb), (cola)); \
 128 }
 129 #define PAINT_HORIZ(inbuf, colr, colg, colb, ptx0, ptx1, pty) \
 130 { \
 131   GnomeCanvasBuf* ph_buf = (inbuf); \
 132   guchar* ph_p; \
 133   gint ph_a0, ph_a1; \
 134   gint ph_colr=(colr), ph_colg=(colg), ph_colb=(colb); \
 135 \
 136   ph_a0 = MAX(ph_buf->rect.x0, (gint)(ptx0)); \
 137   ph_a1 = MIN(ph_buf->rect.x1, (gint)(ptx1)); \
 138 \
 139   if (ph_a0 < ph_a1 && BUF_INBOUNDS_Y(ph_buf, (gint)(pty))) { \
 140     ph_p = BUF_PTR(ph_buf, ph_a0, pty); \
 141     while (ph_a0 < ph_a1) { \
 142       PIXEL_RGB(ph_p, ph_colr, ph_colg, ph_colb); \
 143       ++ph_a0; \
 144       ph_p += 3; \
 145     } \
 146   } \
 147 }
 148 #define FAST_PAINT_HORIZ(inbuf, colr, colg, colb, ptx0, ptx1, pty) \
 149 { \
 150   GnomeCanvasBuf* ph_buf = (inbuf); \
 151   guchar* ph_p; \
 152   gint ph_a0, ph_a1; \
 153   gint ph_colr=(colr), ph_colg=(colg), ph_colb=(colb); \
 154 \
 155   ph_a0 = MAX(ph_buf->rect.x0, (gint)(ptx0)); \
 156   ph_a1 = MIN(ph_buf->rect.x1, (gint)(ptx1)); \
 157 \
 158   if (ph_a0 < ph_a1 && BUF_INBOUNDS_Y(ph_buf, (gint)(pty))) { \
 159     ph_p = BUF_PTR(ph_buf, ph_a0, pty); \
 160     while (ph_a0 < ph_a1) { \
 161       PIXEL_RGB(ph_p, ph_colr, ph_colg, ph_colb); \
 162       ++ph_a0; \
 163       ph_p += 3; \
 164     } \
 165   } \
 166 }
 167 #define PAINT_HORIZA(inbuf, colr, colg, colb, cola, ptx0, ptx1, pty) \
 168 { \
 169   GnomeCanvasBuf* ph_buf = (inbuf); \
 170   guchar* ph_p; \
 171   gint ph_a0, ph_a1; \
 172   gint ph_colr=(colr), ph_colg=(colg), ph_colb=(colb), ph_cola=(cola); \
 173 \
 174   ph_a0 = MAX(ph_buf->rect.x0, (gint)(ptx0)); \
 175   ph_a1 = MIN(ph_buf->rect.x1, (gint)(ptx1)); \
 176 \
 177   if (ph_a0 < ph_a1 && BUF_INBOUNDS_Y(ph_buf, (gint)(pty))) { \
 178     ph_p = BUF_PTR(ph_buf, ph_a0, pty); \
 179     while (ph_a0 < ph_a1) { \
 180       PIXEL_RGBA(ph_p, ph_colr, ph_colg, ph_colb, ph_cola); \
 181       ++ph_a0; \
 182       ph_p += 3; \
 183     } \
 184   } \
 185 }
 186 #define PAINT_VERT(inbuf, colr, colg, colb, ptx, pty0, pty1) \
 187 { \
 188   GnomeCanvasBuf* pv_buf = (inbuf); \
 189   guchar* pv_p; \
 190   gint pv_b0, pv_b1; \
 191   gint pv_colr=(colr), pv_colg=(colg), pv_colb=(colb);\
 192 \
 193   pv_b0 = MAX(pv_buf->rect.y0, (gint)(pty0)); \
 194   pv_b1 = MIN(pv_buf->rect.y1, (gint)(pty1)); \
 195 \
 196  if (pv_b0 < pv_b1 && BUF_INBOUNDS_X(pv_buf, (gint)(ptx))) { \
 197     pv_p = BUF_PTR(pv_buf, ptx, pv_b0); \
 198     while (pv_b0 < pv_b1) { \
 199       PIXEL_RGB(pv_p, pv_colr, pv_colg, pv_colb); \
 200       ++pv_b0; \
 201       pv_p += pv_buf->buf_rowstride; \
 202     } \
 203   } \
 204 }
 205 #define FAST_PAINT_VERT(inbuf, colr, colg, colb, ptx, pty0, pty1) \
 206 { \
 207   GnomeCanvasBuf* fpv_buf = (inbuf); \
 208   guchar* fpv_p; \
 209   gint fpv_b0, fpv_b1; \
 210 \
 211   fpv_b0 = MAX(fpv_buf->rect.y0, (gint)(pty0)); \
 212   fpv_b1 = MIN(fpv_buf->rect.y1, (gint)(pty1)); \
 213 \
 214   fpv_p = BUF_PTR(fpv_buf, ptx, fpv_b0); \
 215 \
 216   while (fpv_b0 < fpv_b1) { \
 217       PIXEL_RGB(fpv_p, colr, colg, colb); \
 218       ++fpv_b0; \
 219       fpv_p += fpv_buf->buf_rowstride; \
 220   } \
 221 }
 222 #define PAINT_VERTA(inbuf, colr, colg, colb, cola, ptx, pty0, pty1) \
 223 { \
 224   GnomeCanvasBuf* pv_buf = (inbuf); \
 225   guchar* pv_p; \
 226   gint pv_b0, pv_b1; \
 227   gint pv_colr=(colr), pv_colg=(colg), pv_colb=(colb), pv_cola=(cola);\
 228 \
 229   pv_b0 = MAX(pv_buf->rect.y0, (pty0)); \
 230   pv_b1 = MIN(pv_buf->rect.y1, (pty1)); \
 231 \
 232  if (pv_b0 < pv_b1 && BUF_INBOUNDS_X(pv_buf, ptx)) { \
 233     pv_p = BUF_PTR(pv_buf, ptx, pv_b0); \
 234     while (pv_b0 < pv_b1) { \
 235       PIXEL_RGBA(pv_p, pv_colr, pv_colg, pv_colb, pv_cola); \
 236       ++pv_b0; \
 237       pv_p += pv_buf->buf_rowstride; \
 238     } \
 239   } \
 240 }
 241
 242 /* Paint a solid-colored box into a GnomeCanvasBuf (clipping as necessary).
 243    The box contains (ptx0,pty0), but not (ptx1, pty1).
 244    Each macro arg should appear exactly once in the body of the code. */
 245 #define PAINT_BOX(inbuf, colr, colg, colb, cola, ptx0, pty0, ptx1, pty1) \
 246 { \
 247   GnomeCanvasBuf* pb_buf = (inbuf); \
 248   guchar* pb_p; \
 249   guchar* pb_pp; \
 250   gint pb_a0, pb_a1, pb_b0, pb_b1, pb_i, pb_j; \
 251   gint pb_colr=(colr), pb_colg=(colg), pb_colb=(colb), pb_cola=(cola); \
 252 \
 253   pb_a0 = MAX(pb_buf->rect.x0, (ptx0)); \
 254   pb_a1 = MIN(pb_buf->rect.x1, (ptx1)); \
 255   pb_b0 = MAX(pb_buf->rect.y0, (pty0)); \
 256   pb_b1 = MIN(pb_buf->rect.y1, (pty1)); \
 257 \
 258   if (pb_a0 < pb_a1 && pb_b0 < pb_b1) { \
 259     pb_p = BUF_PTR(pb_buf, pb_a0, pb_b0); \
 260     for (pb_j=pb_b0; pb_j<pb_b1; ++pb_j) { \
 261       pb_pp = pb_p; \
 262       for (pb_i=pb_a0; pb_i<pb_a1; ++pb_i) { \
 263         PIXEL_RGBA(pb_pp, pb_colr, pb_colg, pb_colb, pb_cola); \
 264         pb_pp += 3; \
 265       } \
 266       pb_p += pb_buf->buf_rowstride; \
 267     } \
 268   } \
 269 }
 270
 271 /* No bounds checking in this version */
 272
 273 #define FAST_PAINT_BOX(inbuf, colr, colg, colb, cola, ptx0, pty0, ptx1, pty1) \
 274 { \
 275   GnomeCanvasBuf* pb_buf = (inbuf); \
 276   guchar* pb_p; \
 277   guchar* pb_pp; \
 278   gint pb_i, pb_j; \
 279 \
 280   pb_p = BUF_PTR(pb_buf, ptx0, pty0); \
 281   for (pb_j=pty0; pb_j<pty1; ++pb_j) { \
 282       pb_pp = pb_p; \
 283       for (pb_i=ptx0; pb_i<ptx1; ++pb_i) { \
 284         PIXEL_RGBA(pb_pp, colr, colg, colb, cola); \
 285         pb_pp += 3; \
 286       } \
 287       pb_p += pb_buf->buf_rowstride; \
 288     } \
 289 }
 290
 291 #endif /* __gtk_ardour_rgb_macros_h__ */