| blob | d5b57226872f9af8dbe10f8bd339e436eaa1c504 |
1 /*
2 Copyright (C) 2000 EMC Capital Management, Inc.
4 Developed by Jon Trowbridge <trow@gnu.org> and
5 Havoc Pennington <hp@pobox.com>.
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.
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.
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.
21 */
23 #ifndef __gtk_ardour_rgb_macros_h__
24 #define __gtk_ardour_rgb_macros_h__
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 */
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_CHANGE_R(x, r) (((x)&(~(0xff<<24)))|(((r)&0xff)<<24))
58 #define UINT_RGBA_CHANGE_G(x, g) (((x)&(~(0xff<<16)))|(((g)&0xff)<<16))
59 #define UINT_RGBA_CHANGE_B(x, b) (((x)&(~(0xff<<8)))|(((b)&0xff)<<8))
60 #define UINT_RGBA_CHANGE_A(x, a) (((x)&(~0xff))|((a)&0xff))
61 #define UINT_TO_RGB(u,r,g,b) \
62 { (*(r)) = ((u)>>16)&0xff; (*(g)) = ((u)>>8)&0xff; (*(b)) = (u)&0xff; }
63 #define UINT_TO_RGBA(u,r,g,b,a) \
64 { UINT_TO_RGB(((u)>>8),r,g,b); (*(a)) = (u)&0xff; }
65 #define MONO_INTERPOLATE(v1, v2, t) ((gint)rint((v2)*(t)+(v1)*(1-(t))))
66 #define UINT_INTERPOLATE(c1, c2, t) \
67 RGBA_TO_UINT( MONO_INTERPOLATE(UINT_RGBA_R(c1), UINT_RGBA_R(c2), t), \
68 MONO_INTERPOLATE(UINT_RGBA_G(c1), UINT_RGBA_G(c2), t), \
69 MONO_INTERPOLATE(UINT_RGBA_B(c1), UINT_RGBA_B(c2), t), \
70 MONO_INTERPOLATE(UINT_RGBA_A(c1), UINT_RGBA_A(c2), t) )
71 #define PIXEL_RGB(p, r, g, b) \
72 {((guchar*)(p))[0]=(r); ((guchar*)(p))[1]=(g); ((guchar*)(p))[2]=(b);}
73 #define PIXEL_RGBA(p, r, g, b, a) \
74 { if ((a)>=0xff) { PIXEL_RGB(p,r,g,b) } \
75 else if ((a)>0) { \
76 guint pixel_tmp; \
77 pixel_tmp = ((guchar*)(p))[0]; \
78 ((guchar*)(p))[0] = pixel_tmp + ((((r)-pixel_tmp)*(a)+0x80) >> 8); \
79 pixel_tmp = ((guchar*)(p))[1]; \
80 ((guchar*)(p))[1] = pixel_tmp + ((((g)-pixel_tmp)*(a)+0x80) >> 8); \
81 pixel_tmp = ((guchar*)(p))[2]; \
82 ((guchar*)(p))[2] = pixel_tmp + ((((b)-pixel_tmp)*(a)+0x80) >> 8); }}
83 #define PIXEL_RGB_UINT(p, i) \
84 UINT_TO_RGB((i), ((guchar*)p), ((guchar*)p)+1, ((guchar*)p)+2)
85 #define PIXEL_RGBA_UINT(p, i) \
86 PIXEL_RGBA((p), ((i)>>24)&0xff, ((i)>>16)&0xff, ((i)>>8)&0xff, (i)&0xff)
87 #define PIXEL_BLACK(p) PIXEL_RGB(p,0,0,0)
88 #define PIXEL_WHITE(p) PIXEL_RGB(p,0xff,0xff,0xff)
89 #define PIXEL_GREY(p,g) PIXEL_RGB(p,g,g,g)
90 #define PIXEL_GREYA(p,g,a) PIXEL_RGBA(p,g,g,g,a)
91 #define BUF_PTR(inbuf, ptx, pty) \
92 ((inbuf)->buf + 3*((ptx)-(inbuf)->rect.x0) + (inbuf)->buf_rowstride*((pty)-(inbuf)->rect.y0))
93 #define BUF_INBOUNDS_X(inbuf, ptx) \
94 ((inbuf)->rect.x0 <= (ptx) && (ptx) < (inbuf)->rect.x1)
95 #define BUF_INBOUNDS_Y(inbuf, pty) \
96 ((inbuf)->rect.y0 <= (pty) && (pty) < (inbuf)->rect.y1)
97 #define PAINT_DOT(inbuf, colr, colg, colb,ptx, pty) \
98 { \
99 guchar* pd_p; \
100 if (BUF_INBOUNDS_X(inbuf, ptx) && BUF_INBOUNDS_Y(inbuf, pty)) { \
101 pd_p = BUF_PTR(inbuf, ptx, pty); \
102 PIXEL_RGB(pd_p, (colr), (colg), (colb)); \
103 } \
104 }
105 #define FAST_PAINT_DOT(inbuf, colr, colg, colb,ptx, pty) \
106 { \
107 guchar* pd_p; \
108 pd_p = BUF_PTR(inbuf, ptx, pty); \
109 PIXEL_RGB(pd_p, (colr), (colg), (colb)); \
110 }
111 #define PAINT_DOTA(inbuf, colr, colg, colb, cola, ptx, pty) \
112 { \
113 guchar* pd_p; \
114 if (BUF_INBOUNDS_X(inbuf, ptx) && BUF_INBOUNDS_Y(inbuf, pty)) { \
115 pd_p = BUF_PTR(inbuf, ptx, pty); \
116 PIXEL_RGBA(pd_p, (colr), (colg), (colb), (cola)); \
117 } \
118 }
119 #define FAST_PAINT_DOTA(inbuf, colr, colg, colb, cola, ptx, pty) \
120 { \
121 guchar* pd_p; \
122 pd_p = BUF_PTR(inbuf, ptx, pty); \
123 PIXEL_RGBA(pd_p, (colr), (colg), (colb), (cola)); \
124 }
125 #define PAINT_HORIZ(inbuf, colr, colg, colb, ptx0, ptx1, pty) \
126 { \
127 GnomeCanvasBuf* ph_buf = (inbuf); \
128 guchar* ph_p; \
129 gint ph_a0, ph_a1; \
130 gint ph_colr=(colr), ph_colg=(colg), ph_colb=(colb); \
131 \
132 ph_a0 = MAX(ph_buf->rect.x0, (ptx0)); \
133 ph_a1 = MIN(ph_buf->rect.x1, (ptx1)); \
134 \
135 if (ph_a0 < ph_a1 && BUF_INBOUNDS_Y(ph_buf, pty)) { \
136 ph_p = BUF_PTR(ph_buf, ph_a0, pty); \
137 while (ph_a0 < ph_a1) { \
138 PIXEL_RGB(ph_p, ph_colr, ph_colg, ph_colb); \
139 ++ph_a0; \
140 ph_p += 3; \
141 } \
142 } \
143 }
144 #define FAST_PAINT_HORIZ(inbuf, colr, colg, colb, ptx0, ptx1, pty) \
145 { \
146 GnomeCanvasBuf* ph_buf = (inbuf); \
147 guchar* ph_p; \
148 gint ph_a0, ph_a1; \
149 gint ph_colr=(colr), ph_colg=(colg), ph_colb=(colb); \
150 \
151 ph_a0 = MAX(ph_buf->rect.x0, (ptx0)); \
152 ph_a1 = MIN(ph_buf->rect.x1, (ptx1)); \
153 \
154 if (ph_a0 < ph_a1 && BUF_INBOUNDS_Y(ph_buf, pty)) { \
155 ph_p = BUF_PTR(ph_buf, ph_a0, pty); \
156 while (ph_a0 < ph_a1) { \
157 PIXEL_RGB(ph_p, ph_colr, ph_colg, ph_colb); \
158 ++ph_a0; \
159 ph_p += 3; \
160 } \
161 } \
162 }
163 #define PAINT_HORIZA(inbuf, colr, colg, colb, cola, ptx0, ptx1, pty) \
164 { \
165 GnomeCanvasBuf* ph_buf = (inbuf); \
166 guchar* ph_p; \
167 gint ph_a0, ph_a1; \
168 gint ph_colr=(colr), ph_colg=(colg), ph_colb=(colb), ph_cola=(cola); \
169 \
170 ph_a0 = MAX(ph_buf->rect.x0, (ptx0)); \
171 ph_a1 = MIN(ph_buf->rect.x1, (ptx1)); \
172 \
173 if (ph_a0 < ph_a1 && BUF_INBOUNDS_Y(ph_buf, pty)) { \
174 ph_p = BUF_PTR(ph_buf, ph_a0, pty); \
175 while (ph_a0 < ph_a1) { \
176 PIXEL_RGBA(ph_p, ph_colr, ph_colg, ph_colb, ph_cola); \
177 ++ph_a0; \
178 ph_p += 3; \
179 } \
180 } \
181 }
182 #define PAINT_VERT(inbuf, colr, colg, colb, ptx, pty0, pty1) \
183 { \
184 GnomeCanvasBuf* pv_buf = (inbuf); \
185 guchar* pv_p; \
186 gint pv_b0, pv_b1; \
187 gint pv_colr=(colr), pv_colg=(colg), pv_colb=(colb);\
188 \
189 pv_b0 = MAX(pv_buf->rect.y0, (pty0)); \
190 pv_b1 = MIN(pv_buf->rect.y1, (pty1)); \
191 \
192 if (pv_b0 < pv_b1 && BUF_INBOUNDS_X(pv_buf, ptx)) { \
193 pv_p = BUF_PTR(pv_buf, ptx, pv_b0); \
194 while (pv_b0 < pv_b1) { \
195 PIXEL_RGB(pv_p, pv_colr, pv_colg, pv_colb); \
196 ++pv_b0; \
197 pv_p += pv_buf->buf_rowstride; \
198 } \
199 } \
200 }
201 #define FAST_PAINT_VERT(inbuf, colr, colg, colb, ptx, pty0, pty1) \
202 { \
203 GnomeCanvasBuf* fpv_buf = (inbuf); \
204 guchar* fpv_p; \
205 gint fpv_b0, fpv_b1; \
206 \
207 fpv_b0 = MAX(fpv_buf->rect.y0, (pty0)); \
208 fpv_b1 = MIN(fpv_buf->rect.y1, (pty1)); \
209 \
210 fpv_p = BUF_PTR(fpv_buf, ptx, fpv_b0); \
211 \
212 while (fpv_b0 < fpv_b1) { \
213 PIXEL_RGB(fpv_p, colr, colg, colb); \
214 ++fpv_b0; \
215 fpv_p += fpv_buf->buf_rowstride; \
216 } \
217 }
218 #define PAINT_VERTA(inbuf, colr, colg, colb, cola, ptx, pty0, pty1) \
219 { \
220 GnomeCanvasBuf* pv_buf = (inbuf); \
221 guchar* pv_p; \
222 gint pv_b0, pv_b1; \
223 gint pv_colr=(colr), pv_colg=(colg), pv_colb=(colb), pv_cola=(cola);\
224 \
225 pv_b0 = MAX(pv_buf->rect.y0, (pty0)); \
226 pv_b1 = MIN(pv_buf->rect.y1, (pty1)); \
227 \
228 if (pv_b0 < pv_b1 && BUF_INBOUNDS_X(pv_buf, ptx)) { \
229 pv_p = BUF_PTR(pv_buf, ptx, pv_b0); \
230 while (pv_b0 < pv_b1) { \
231 PIXEL_RGBA(pv_p, pv_colr, pv_colg, pv_colb, pv_cola); \
232 ++pv_b0; \
233 pv_p += pv_buf->buf_rowstride; \
234 } \
235 } \
236 }
238 /* Paint a solid-colored box into a GnomeCanvasBuf (clipping as necessary).
239 The box contains (ptx0,pty0), but not (ptx1, pty1).
240 Each macro arg should appear exactly once in the body of the code. */
241 #define PAINT_BOX(inbuf, colr, colg, colb, cola, ptx0, pty0, ptx1, pty1) \
242 { \
243 GnomeCanvasBuf* pb_buf = (inbuf); \
244 guchar* pb_p; \
245 guchar* pb_pp; \
246 gint pb_a0, pb_a1, pb_b0, pb_b1, pb_i, pb_j; \
247 gint pb_colr=(colr), pb_colg=(colg), pb_colb=(colb), pb_cola=(cola); \
248 \
249 pb_a0 = MAX(pb_buf->rect.x0, (ptx0)); \
250 pb_a1 = MIN(pb_buf->rect.x1, (ptx1)); \
251 pb_b0 = MAX(pb_buf->rect.y0, (pty0)); \
252 pb_b1 = MIN(pb_buf->rect.y1, (pty1)); \
253 \
254 if (pb_a0 < pb_a1 && pb_b0 < pb_b1) { \
255 pb_p = BUF_PTR(pb_buf, pb_a0, pb_b0); \
256 for (pb_j=pb_b0; pb_j<pb_b1; ++pb_j) { \
257 pb_pp = pb_p; \
258 for (pb_i=pb_a0; pb_i<pb_a1; ++pb_i) { \
259 PIXEL_RGBA(pb_pp, pb_colr, pb_colg, pb_colb, pb_cola); \
260 pb_pp += 3; \
261 } \
262 pb_p += pb_buf->buf_rowstride; \
263 } \
264 } \
265 }
267 /* No bounds checking in this version */
269 #define FAST_PAINT_BOX(inbuf, colr, colg, colb, cola, ptx0, pty0, ptx1, pty1) \
270 { \
271 GnomeCanvasBuf* pb_buf = (inbuf); \
272 guchar* pb_p; \
273 guchar* pb_pp; \
274 gint pb_i, pb_j; \
275 \
276 pb_p = BUF_PTR(pb_buf, ptx0, pty0); \
277 for (pb_j=pty0; pb_j<pty1; ++pb_j) { \
278 pb_pp = pb_p; \
279 for (pb_i=ptx0; pb_i<ptx1; ++pb_i) { \
280 PIXEL_RGBA(pb_pp, colr, colg, colb, cola); \
281 pb_pp += 3; \
282 } \
283 pb_p += pb_buf->buf_rowstride; \
284 } \
285 }