source: trunk/src/opengl/mesa/pb.h@ 3993

Last change on this file since 3993 was 3597, checked in by jeroen, 25 years ago

* empty log message *
File size: 8.0 KB
Line 
1/* $Id: pb.h,v 1.2 2000-05-23 20:34:54 jeroen Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version: 3.3
6 *
7 * Copyright (C) 1999 Brian Paul All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28
29
30
31#ifndef PB_H
32#define PB_H
33
34
35#include "types.h"
36
37
38/*
39 * Pixel buffer size, must be larger than MAX_WIDTH.
40 */
41#define PB_SIZE (3*MAX_WIDTH)
42
43
44struct pixel_buffer {
45 GLint x[PB_SIZE]; /* X window coord in [0,MAX_WIDTH) */
46 GLint y[PB_SIZE]; /* Y window coord in [0,MAX_HEIGHT) */
47 GLdepth z[PB_SIZE]; /* Z window coord in [0,Visual.MaxDepth] */
48 GLubyte rgba[PB_SIZE][4]; /* Colors */
49 GLubyte spec[PB_SIZE][3]; /* Separate specular colors */
50 GLuint i[PB_SIZE]; /* Index */
51 GLfloat s[MAX_TEXTURE_UNITS][PB_SIZE]; /* Texture S coordinates */
52 GLfloat t[MAX_TEXTURE_UNITS][PB_SIZE]; /* Texture T coordinates */
53 GLfloat u[MAX_TEXTURE_UNITS][PB_SIZE]; /* Texture R coordinates */
54 GLfloat lambda[MAX_TEXTURE_UNITS][PB_SIZE];/* Texture lambda values */
55 GLint color[4]; /* Mono color, integers! */
56 GLuint index; /* Mono index */
57 GLuint count; /* Number of pixels in buffer */
58 GLboolean mono; /* Same color or index for all pixels? */
59 GLenum primitive; /* GL_POINT, GL_LINE, GL_POLYGON or GL_BITMAP*/
60};
61
62
63
64/*
65 * Set the color used for all subsequent pixels in the buffer.
66 */
67#define PB_SET_COLOR( CTX, PB, R, G, B, A ) \
68 if ((PB)->color[RCOMP]!=(R) || (PB)->color[GCOMP]!=(G) \
69 || (PB)->color[BCOMP]!=(B) || (PB)->color[ACOMP]!=(A) \
70 || !(PB)->mono) { \
71 gl_flush_pb( ctx ); \
72 } \
73 (PB)->color[RCOMP] = R; \
74 (PB)->color[GCOMP] = G; \
75 (PB)->color[BCOMP] = B; \
76 (PB)->color[ACOMP] = A; \
77 (PB)->mono = GL_TRUE;
78
79
80/*
81 * Set the color index used for all subsequent pixels in the buffer.
82 */
83#define PB_SET_INDEX( CTX, PB, I ) \
84 if ((PB)->index!=(I) || !(PB)->mono) { \
85 gl_flush_pb( CTX ); \
86 } \
87 (PB)->index = I; \
88 (PB)->mono = GL_TRUE;
89
90
91/*
92 * "write" a pixel using current color or index
93 */
94#define PB_WRITE_PIXEL( PB, X, Y, Z ) \
95 (PB)->x[(PB)->count] = X; \
96 (PB)->y[(PB)->count] = Y; \
97 (PB)->z[(PB)->count] = Z; \
98 (PB)->count++;
99
100
101/*
102 * "write" an RGBA pixel
103 */
104#define PB_WRITE_RGBA_PIXEL( PB, X, Y, Z, R, G, B, A ) \
105 (PB)->x[(PB)->count] = X; \
106 (PB)->y[(PB)->count] = Y; \
107 (PB)->z[(PB)->count] = Z; \
108 (PB)->rgba[(PB)->count][RCOMP] = R; \
109 (PB)->rgba[(PB)->count][GCOMP] = G; \
110 (PB)->rgba[(PB)->count][BCOMP] = B; \
111 (PB)->rgba[(PB)->count][ACOMP] = A; \
112 (PB)->count++;
113
114/*
115 * "write" a color-index pixel
116 */
117#define PB_WRITE_CI_PIXEL( PB, X, Y, Z, I ) \
118 (PB)->x[(PB)->count] = X; \
119 (PB)->y[(PB)->count] = Y; \
120 (PB)->z[(PB)->count] = Z; \
121 (PB)->i[(PB)->count] = I; \
122 (PB)->count++;
123
124
125/*
126 * "write" an RGBA pixel with texture coordinates
127 */
128#define PB_WRITE_TEX_PIXEL( PB, X, Y, Z, R, G, B, A, S, T, U ) \
129 (PB)->x[(PB)->count] = X; \
130 (PB)->y[(PB)->count] = Y; \
131 (PB)->z[(PB)->count] = Z; \
132 (PB)->rgba[(PB)->count][RCOMP] = R; \
133 (PB)->rgba[(PB)->count][GCOMP] = G; \
134 (PB)->rgba[(PB)->count][BCOMP] = B; \
135 (PB)->rgba[(PB)->count][ACOMP] = A; \
136 (PB)->s[0][(PB)->count] = S; \
137 (PB)->t[0][(PB)->count] = T; \
138 (PB)->u[0][(PB)->count] = U; \
139 (PB)->count++;
140
141/*
142 * "write" an RGBA pixel with multiple texture coordinates
143 */
144#define PB_WRITE_MULTITEX_PIXEL( PB, X, Y, Z, R, G, B, A, S, T, U, S1, T1, U1 ) \
145 (PB)->x[(PB)->count] = X; \
146 (PB)->y[(PB)->count] = Y; \
147 (PB)->z[(PB)->count] = Z; \
148 (PB)->rgba[(PB)->count][RCOMP] = R; \
149 (PB)->rgba[(PB)->count][GCOMP] = G; \
150 (PB)->rgba[(PB)->count][BCOMP] = B; \
151 (PB)->rgba[(PB)->count][ACOMP] = A; \
152 (PB)->s[0][(PB)->count] = S; \
153 (PB)->t[0][(PB)->count] = T; \
154 (PB)->u[0][(PB)->count] = U; \
155 (PB)->s[1][(PB)->count] = S1; \
156 (PB)->t[1][(PB)->count] = T1; \
157 (PB)->u[1][(PB)->count] = U1; \
158 (PB)->count++;
159
160/*
161 * "write" an RGBA pixel with multiple texture coordinates and specular color
162 */
163#define PB_WRITE_MULTITEX_SPEC_PIXEL( PB, X, Y, Z, R, G, B, A, \
164 SR, SG, SB, S, T, U, S1, T1, U1 ) \
165 (PB)->x[(PB)->count] = X; \
166 (PB)->y[(PB)->count] = Y; \
167 (PB)->z[(PB)->count] = Z; \
168 (PB)->rgba[(PB)->count][RCOMP] = R; \
169 (PB)->rgba[(PB)->count][GCOMP] = G; \
170 (PB)->rgba[(PB)->count][BCOMP] = B; \
171 (PB)->rgba[(PB)->count][ACOMP] = A; \
172 (PB)->spec[(PB)->count][RCOMP] = SR; \
173 (PB)->spec[(PB)->count][GCOMP] = SG; \
174 (PB)->spec[(PB)->count][BCOMP] = SB; \
175 (PB)->s[0][(PB)->count] = S; \
176 (PB)->t[0][(PB)->count] = T; \
177 (PB)->u[0][(PB)->count] = U; \
178 (PB)->s[1][(PB)->count] = S1; \
179 (PB)->t[1][(PB)->count] = T1; \
180 (PB)->u[1][(PB)->count] = U1; \
181 (PB)->count++;
182
183
184
185/*
186 * Call this function at least every MAX_WIDTH pixels:
187 */
188#define PB_CHECK_FLUSH( CTX, PB ) \
189do { \
190 if ((PB)->count>=PB_SIZE-MAX_WIDTH) { \
191 gl_flush_pb( CTX ); \
192 } \
193} while(0)
194
195extern struct pixel_buffer *gl_alloc_pb(void);
196
197extern void gl_flush_pb( GLcontext *ctx );
198
199#endif
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