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- /* $Id: pb.h,v 1.2 1997/02/09 18:43:14 brianp Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 2.2
- * Copyright (C) 1995-1997 Brian Paul
- *
- * 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.
- */
-
-
- /*
- * $Log: pb.h,v $
- * Revision 1.2 1997/02/09 18:43:14 brianp
- * added GL_EXT_texture3D support
- *
- * Revision 1.1 1996/09/13 01:38:16 brianp
- * Initial revision
- *
- */
-
-
- #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 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 u[PB_SIZE]; /* Texture R coordinate */
- 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*/
- };
-
-
- /*
- * Initialize the Pixel Buffer, specifying the type of primitive being drawn.
- */
- #define PB_INIT( PB, PRIM ) \
- (PB)->count = 0; \
- (PB)->mono = GL_FALSE; \
- (PB)->primitive = (PRIM);
-
-
-
- /*
- * Set the color used for all subsequent pixels in the buffer.
- */
- #define PB_SET_COLOR( CTX, PB, R, G, B, A ) \
- if ((PB)->color[0]!=(R) || (PB)->color[1]!=(G) \
- || (PB)->color[2]!=(B) || (PB)->color[3]!=(A) \
- || !(PB)->mono) { \
- gl_flush_pb( ctx ); \
- } \
- (PB)->color[0] = R; \
- (PB)->color[1] = G; \
- (PB)->color[2] = B; \
- (PB)->color[3] = 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)->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( 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)->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)->u[(PB)->count] = U; \
- (PB)->count++;
-
-
- /*
- * Call this function at least every MAX_WIDTH pixels:
- */
- #define PB_CHECK_FLUSH( CTX, PB ) \
- if ((PB)->count>=PB_SIZE-MAX_WIDTH) { \
- gl_flush_pb( CTX ); \
- }
-
-
- extern void gl_flush_pb( GLcontext *ctx );
-
- #endif
-