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/*
* Mesa 3-D graphics library
* Version: 3.3
*
* Copyright (C) 1999-2000 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 {
GLenum primitive; /* GL_POINT, GL_LINE, GL_POLYGON or GL_BITMAP */
GLubyte currentColor[4]; /* Current color, for subsequent pixels */
GLuint currentIndex; /* Current index, for subsequent pixels */
GLuint count; /* Number of pixels in buffer */
GLboolean mono; /* Same color or index for all pixels? */
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,Visual.MaxDepth] */
GLubyte rgba[PB_SIZE][4]; /* Colors */
GLubyte spec[PB_SIZE][3]; /* Separate specular colors */
GLuint index[PB_SIZE]; /* Color indexes */
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 */
};
/*
* Set the color used for all subsequent pixels in the buffer.
*/
#define PB_SET_COLOR( PB, R, G, B, A ) \
do { \
if ((PB)->count > 0) \
(PB)->mono = GL_FALSE; \
(PB)->currentColor[RCOMP] = (R); \
(PB)->currentColor[GCOMP] = (G); \
(PB)->currentColor[BCOMP] = (B); \
(PB)->currentColor[ACOMP] = (A); \
} while (0)
/*
* Set the color index used for all subsequent pixels in the buffer.
*/
#define PB_SET_INDEX( PB, I ) \
do { \
if ((PB)->count > 0) \
(PB)->mono = GL_FALSE; \
(PB)->currentIndex = (I); \
} while (0)
/*
* "write" a pixel using current color or index
*/
#define PB_WRITE_PIXEL( PB, X, Y, Z ) \
do { \
GLuint count = (PB)->count; \
(PB)->x[count] = X; \
(PB)->y[count] = Y; \
(PB)->z[count] = Z; \
COPY_4UBV((PB)->rgba[count], (PB)->currentColor); \
(PB)->index[count] = (PB)->currentIndex; \
(PB)->count++; \
} while (0)
/*
(PB)->rgba[count][0] = (PB)->currentColor[0]; \
(PB)->rgba[count][1] = (PB)->currentColor[1]; \
(PB)->rgba[count][2] = (PB)->currentColor[2]; \
(PB)->rgba[count][3] = (PB)->currentColor[3]; \
*/
/*
* "write" an RGBA pixel
*/
#define PB_WRITE_RGBA_PIXEL( PB, X, Y, Z, R, G, B, A ) \
do { \
GLuint count = (PB)->count; \
(PB)->x[count] = X; \
(PB)->y[count] = Y; \
(PB)->z[count] = Z; \
(PB)->rgba[count][RCOMP] = R; \
(PB)->rgba[count][GCOMP] = G; \
(PB)->rgba[count][BCOMP] = B; \
(PB)->rgba[count][ACOMP] = A; \
(PB)->mono = GL_FALSE; \
(PB)->count++; \
} while (0)
/*
* "write" a color-index pixel
*/
#define PB_WRITE_CI_PIXEL( PB, X, Y, Z, I ) \
do { \
GLuint count = (PB)->count; \
(PB)->x[count] = X; \
(PB)->y[count] = Y; \
(PB)->z[count] = Z; \
(PB)->index[count] = I; \
(PB)->mono = GL_FALSE; \
(PB)->count++; \
} while (0)
/*
* "write" an RGBA pixel with texture coordinates
*/
#define PB_WRITE_TEX_PIXEL( PB, X, Y, Z, R, G, B, A, S, T, U ) \
do { \
GLuint count = (PB)->count; \
(PB)->x[count] = X; \
(PB)->y[count] = Y; \
(PB)->z[count] = Z; \
(PB)->rgba[count][RCOMP] = R; \
(PB)->rgba[count][GCOMP] = G; \
(PB)->rgba[count][BCOMP] = B; \
(PB)->rgba[count][ACOMP] = A; \
(PB)->s[0][count] = S; \
(PB)->t[0][count] = T; \
(PB)->u[0][count] = U; \
(PB)->mono = GL_FALSE; \
(PB)->count++; \
} while (0)
/*
* "write" an RGBA pixel with multiple texture coordinates
*/
#define PB_WRITE_MULTITEX_PIXEL( PB, X, Y, Z, R, G, B, A, S0, T0, U0, S1, T1, U1 ) \
do { \
GLuint count = (PB)->count; \
(PB)->x[count] = X; \
(PB)->y[count] = Y; \
(PB)->z[count] = Z; \
(PB)->rgba[count][RCOMP] = R; \
(PB)->rgba[count][GCOMP] = G; \
(PB)->rgba[count][BCOMP] = B; \
(PB)->rgba[count][ACOMP] = A; \
(PB)->s[0][count] = S0; \
(PB)->t[0][count] = T0; \
(PB)->u[0][count] = U0; \
(PB)->s[1][count] = S1; \
(PB)->t[1][count] = T1; \
(PB)->u[1][count] = U1; \
(PB)->mono = GL_FALSE; \
(PB)->count++; \
} while (0)
/*
* "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, S0, T0, U0, S1, T1, U1 ) \
do { \
GLuint count = (PB)->count; \
(PB)->x[count] = X; \
(PB)->y[count] = Y; \
(PB)->z[count] = Z; \
(PB)->rgba[count][RCOMP] = R; \
(PB)->rgba[count][GCOMP] = G; \
(PB)->rgba[count][BCOMP] = B; \
(PB)->rgba[count][ACOMP] = A; \
(PB)->spec[count][RCOMP] = SR; \
(PB)->spec[count][GCOMP] = SG; \
(PB)->spec[count][BCOMP] = SB; \
(PB)->s[0][count] = S0; \
(PB)->t[0][count] = T0; \
(PB)->u[0][count] = U0; \
(PB)->s[1][count] = S1; \
(PB)->t[1][count] = T1; \
(PB)->u[1][count] = U1; \
(PB)->mono = GL_FALSE; \
(PB)->count++; \
} while (0)
/*
* 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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