/* $Id: pb.h,v 1.2 2000-05-23 20:34:54 jeroen Exp $ */ /* * Mesa 3-D graphics library * Version: 3.3 * * 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,Visual.MaxDepth] */ 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