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/* $Id: pb.h,v 1.3 1999/12/14 02:39:38 daryll Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef PB_H
#define PB_H
#include "types.h"
/*
* Pixel buffer size, must be larger than MAX_WIDTH.
*/
#define PB_SIZE (3*MAX_WIDTH)
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) */
GLdepth z[PB_SIZE]; /* Z window coord in [0,MAX_DEPTH] */
GLubyte rgba[PB_SIZE][4]; /* Colors */
GLubyte spec[PB_SIZE][3]; /* Separate specular colors */
GLuint i[PB_SIZE]; /* Index */
GLfloat s[MAX_TEXTURE_UNITS][PB_SIZE]; /* Texture S coordinates */
GLfloat t[MAX_TEXTURE_UNITS][PB_SIZE]; /* Texture T coordinates */
GLfloat u[MAX_TEXTURE_UNITS][PB_SIZE]; /* Texture R coordinates */
GLfloat lambda[MAX_TEXTURE_UNITS][PB_SIZE];/* Texture lambda values */
GLint color[4]; /* Mono color, integers! */
GLuint index; /* Mono index */
GLuint count; /* Number of pixels in buffer */
GLboolean mono; /* Same color or index for all pixels? */
GLenum primitive; /* GL_POINT, GL_LINE, GL_POLYGON or GL_BITMAP*/
};
/*
* Set the color used for all subsequent pixels in the buffer.
*/
#define PB_SET_COLOR( CTX, PB, R, G, B, A ) \
if ((PB)->color[RCOMP]!=(R) || (PB)->color[GCOMP]!=(G) \
|| (PB)->color[BCOMP]!=(B) || (PB)->color[ACOMP]!=(A) \
|| !(PB)->mono) { \
gl_flush_pb( ctx ); \
} \
(PB)->color[RCOMP] = R; \
(PB)->color[GCOMP] = G; \
(PB)->color[BCOMP] = B; \
(PB)->color[ACOMP] = A; \
(PB)->mono = GL_TRUE;
/*
* Set the color index used for all subsequent pixels in the buffer.
*/
#define PB_SET_INDEX( CTX, PB, I ) \
if ((PB)->index!=(I) || !(PB)->mono) { \
gl_flush_pb( CTX ); \
} \
(PB)->index = I; \
(PB)->mono = GL_TRUE;
/*
* "write" a pixel using current color or index
*/
#define PB_WRITE_PIXEL( PB, 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( PB, X, Y, Z, R, G, B, A ) \
(PB)->x[(PB)->count] = X; \
(PB)->y[(PB)->count] = Y; \
(PB)->z[(PB)->count] = Z; \
(PB)->rgba[(PB)->count][RCOMP] = R; \
(PB)->rgba[(PB)->count][GCOMP] = G; \
(PB)->rgba[(PB)->count][BCOMP] = B; \
(PB)->rgba[(PB)->count][ACOMP] = A; \
(PB)->count++;
/*
* "write" a color-index pixel
*/
#define PB_WRITE_CI_PIXEL( PB, 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( PB, X, Y, Z, R, G, B, A, S, T, U ) \
(PB)->x[(PB)->count] = X; \
(PB)->y[(PB)->count] = Y; \
(PB)->z[(PB)->count] = Z; \
(PB)->rgba[(PB)->count][RCOMP] = R; \
(PB)->rgba[(PB)->count][GCOMP] = G; \
(PB)->rgba[(PB)->count][BCOMP] = B; \
(PB)->rgba[(PB)->count][ACOMP] = A; \
(PB)->s[0][(PB)->count] = S; \
(PB)->t[0][(PB)->count] = T; \
(PB)->u[0][(PB)->count] = U; \
(PB)->count++;
/*
* "write" an RGBA pixel with multiple texture coordinates
*/
#define PB_WRITE_MULTITEX_PIXEL( PB, X, Y, Z, R, G, B, A, S, T, U, S1, T1, U1 ) \
(PB)->x[(PB)->count] = X; \
(PB)->y[(PB)->count] = Y; \
(PB)->z[(PB)->count] = Z; \
(PB)->rgba[(PB)->count][RCOMP] = R; \
(PB)->rgba[(PB)->count][GCOMP] = G; \
(PB)->rgba[(PB)->count][BCOMP] = B; \
(PB)->rgba[(PB)->count][ACOMP] = A; \
(PB)->s[0][(PB)->count] = S; \
(PB)->t[0][(PB)->count] = T; \
(PB)->u[0][(PB)->count] = U; \
(PB)->s[1][(PB)->count] = S1; \
(PB)->t[1][(PB)->count] = T1; \
(PB)->u[1][(PB)->count] = U1; \
(PB)->count++;
/*
* "write" an RGBA pixel with multiple texture coordinates and specular color
*/
#define PB_WRITE_MULTITEX_SPEC_PIXEL( PB, X, Y, Z, R, G, B, A, \
SR, SG, SB, S, T, U, S1, T1, U1 ) \
(PB)->x[(PB)->count] = X; \
(PB)->y[(PB)->count] = Y; \
(PB)->z[(PB)->count] = Z; \
(PB)->rgba[(PB)->count][RCOMP] = R; \
(PB)->rgba[(PB)->count][GCOMP] = G; \
(PB)->rgba[(PB)->count][BCOMP] = B; \
(PB)->rgba[(PB)->count][ACOMP] = A; \
(PB)->spec[(PB)->count][RCOMP] = SR; \
(PB)->spec[(PB)->count][GCOMP] = SG; \
(PB)->spec[(PB)->count][BCOMP] = SB; \
(PB)->s[0][(PB)->count] = S; \
(PB)->t[0][(PB)->count] = T; \
(PB)->u[0][(PB)->count] = U; \
(PB)->s[1][(PB)->count] = S1; \
(PB)->t[1][(PB)->count] = T1; \
(PB)->u[1][(PB)->count] = U1; \
(PB)->count++;
/*
* Call this function at least every MAX_WIDTH pixels:
*/
#define PB_CHECK_FLUSH( CTX, PB ) \
do { \
if ((PB)->count>=PB_SIZE-MAX_WIDTH) { \
gl_flush_pb( CTX ); \
} \
} while(0)
extern struct pixel_buffer *gl_alloc_pb(void);
extern void gl_flush_pb( GLcontext *ctx );
#endif
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