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- /* pb.h */
-
- /*
- * Mesa 3-D graphics library
- * Version: 1.2
- * Copyright (C) 1995 Brian Paul (brianp@ssec.wisc.edu)
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
- /*
- $Id: pb.h,v 1.9 1995/07/15 14:04:10 brianp Exp $
-
- $Log: pb.h,v $
- * Revision 1.9 1995/07/15 14:04:10 brianp
- * added PB_WRITE_TEX_PIXEL
- *
- * Revision 1.8 1995/06/20 16:18:39 brianp
- * removed clipflag
- *
- * Revision 1.7 1995/06/12 15:34:47 brianp
- * changed color arrays to GLubyte
- *
- * Revision 1.6 1995/05/22 20:59:34 brianp
- * Release 1.2
- *
- * Revision 1.5 1995/05/17 13:17:22 brianp
- * changed default CC.Mode value to allow use of real OpenGL headers
- * removed need for CC.MajorMode variable
- *
- * Revision 1.4 1995/05/12 16:26:33 brianp
- * added pixel clipping
- *
- * Revision 1.3 1995/03/07 14:21:24 brianp
- * updated for new XSetForeground/GC scheme
- *
- * Revision 1.2 1995/03/04 19:25:29 brianp
- * 1.1 beta revision
- *
- * Revision 1.1 1995/02/24 17:51:57 brianp
- * Initial revision
- *
- */
-
-
- #ifndef PB_H
- #define PB_H
-
-
- #include "GL/gl.h"
-
-
-
-
- #define PB_SIZE (3*1024)
-
-
- struct pixel_buffer {
- GLint x[PB_SIZE]; /* X window coord in [0,MAX_WIDTH) */
- GLint y[PB_SIZE]; /* Y window coord in [0,MAX_HEIGHT) */
- GLint z[PB_SIZE]; /* Z window coord in [0,MAX_DEPTH) */
- GLubyte r[PB_SIZE]; /* Red */
- GLubyte g[PB_SIZE]; /* Green */
- GLubyte b[PB_SIZE]; /* Blue */
- GLubyte a[PB_SIZE]; /* Alpha */
- GLuint i[PB_SIZE]; /* Index */
- GLfloat s[PB_SIZE]; /* Texture S coordinate */
- GLfloat t[PB_SIZE]; /* Texture T coordinate */
- GLfloat color[4]; /* Mono color */
- GLuint index; /* Mono index */
- GLuint count; /* Number of pixels in buffer */
- GLboolean mono; /* Same color or index for all pixels? */
- GLboolean mutable; /* Can color or index be modifed during */
- /* rasterization? */
- GLenum primitive; /* GL_POINT, GL_LINE, GL_POLYGON or GL_BITMAP*/
- };
-
-
- extern struct pixel_buffer PB;
-
-
-
- /*
- * Set the color used for all subsequent pixels in the buffer.
- */
- #define PB_SET_COLOR( C ) \
- if (PB.color[0]!=C[0] || PB.color[1]!=C[1] \
- || PB.color[2]!=C[2] || PB.color[3]!=C[3] \
- || !PB.mono) { \
- gl_flush_pb(); \
- } \
- PB.color[0] = C[0]; \
- PB.color[1] = C[1]; \
- PB.color[2] = C[2]; \
- PB.color[3] = C[3]; \
- PB.mono = GL_TRUE;
-
-
- /*
- * Set the color index used for all subsequent pixels in the buffer.
- */
- #define PB_SET_INDEX( I ) \
- if (PB.index!=(I) || !PB.mono) { \
- gl_flush_pb(); \
- } \
- PB.index = I; \
- PB.mono = GL_TRUE;
-
-
- /*
- * "write" a pixel using current color or index
- */
- #define PB_WRITE_PIXEL( X, Y, Z ) \
- PB.x[PB.count] = X; \
- PB.y[PB.count] = Y; \
- PB.z[PB.count] = Z; \
- PB.count++;
-
-
- /*
- * "write" an RGBA pixel
- */
- #define PB_WRITE_RGBA_PIXEL( X, Y, Z, R, G, B, A ) \
- PB.x[PB.count] = X; \
- PB.y[PB.count] = Y; \
- PB.z[PB.count] = Z; \
- PB.r[PB.count] = R; \
- PB.g[PB.count] = G; \
- PB.b[PB.count] = B; \
- PB.a[PB.count] = A; \
- PB.count++;
-
- /*
- * "write" a color-index pixel
- */
- #define PB_WRITE_CI_PIXEL( X, Y, Z, I ) \
- PB.x[PB.count] = X; \
- PB.y[PB.count] = Y; \
- PB.z[PB.count] = Z; \
- PB.i[PB.count] = I; \
- PB.count++;
-
-
- /*
- * "write" an RGBA pixel with texture coordinates
- */
- #define PB_WRITE_TEX_PIXEL( X, Y, Z, R, G, B, A, S, T ) \
- PB.x[PB.count] = X; \
- PB.y[PB.count] = Y; \
- PB.z[PB.count] = Z; \
- PB.r[PB.count] = R; \
- PB.g[PB.count] = G; \
- PB.b[PB.count] = B; \
- PB.a[PB.count] = A; \
- PB.s[PB.count] = S; \
- PB.t[PB.count] = T; \
- PB.count++;
-
-
- /*
- * Call this function at least every MAX_WIDTH pixels:
- */
- #define PB_CHECK_FLUSH \
- if (PB.count>=PB_SIZE-MAX_WIDTH) { \
- gl_flush_pb(); \
- }
-
-
- extern void gl_init_pb( GLenum primitive );
-
-
- extern void gl_flush_pb( void );
-
-
-
- #endif
-