/* $Id: s_bitmap.c,v 1.4 2001/01/23 23:39:37 brianp Exp $ */ /* * Mesa 3-D graphics library * Version: 3.5 * * Copyright (C) 1999-2001 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. */ #include "glheader.h" #include "image.h" #include "macros.h" #include "pixel.h" #include "s_context.h" #include "s_fog.h" #include "s_pb.h" /* * Render a bitmap. */ void _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py, GLsizei width, GLsizei height, const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) { struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB; GLint row, col; GLdepth fragZ; GLfixed fogCoord; ASSERT(ctx->RenderMode == GL_RENDER); ASSERT(bitmap); if (SWRAST_CONTEXT(ctx)->NewState) _swrast_validate_derived( ctx ); /* Set bitmap drawing color */ if (ctx->Visual.rgbMode) { GLint r, g, b, a; r = (GLint) (ctx->Current.RasterColor[0] * CHAN_MAXF); g = (GLint) (ctx->Current.RasterColor[1] * CHAN_MAXF); b = (GLint) (ctx->Current.RasterColor[2] * CHAN_MAXF); a = (GLint) (ctx->Current.RasterColor[3] * CHAN_MAXF); PB_SET_COLOR( PB, r, g, b, a ); } else { PB_SET_INDEX( PB, ctx->Current.RasterIndex ); } fragZ = (GLdepth) ( ctx->Current.RasterPos[2] * ctx->DepthMaxF); _mesa_win_fog_coords_from_z( ctx, 1, &fragZ, &fogCoord ); for (row=0; row<height; row++) { const GLubyte *src = (const GLubyte *) _mesa_image_address( unpack, bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 ); if (unpack->LsbFirst) { /* Lsb first */ GLubyte mask = 1U << (unpack->SkipPixels & 0x7); for (col=0; col<width; col++) { if (*src & mask) { PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fogCoord ); } if (mask == 128U) { src++; mask = 1U; } else { mask = mask << 1; } } PB_CHECK_FLUSH( ctx, PB ); /* get ready for next row */ if (mask != 1) src++; } else { /* Msb first */ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); for (col=0; col<width; col++) { if (*src & mask) { PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fogCoord ); } if (mask == 1U) { src++; mask = 128U; } else { mask = mask >> 1; } } PB_CHECK_FLUSH( ctx, PB ); /* get ready for next row */ if (mask != 128) src++; } } gl_flush_pb(ctx); }