diff options
Diffstat (limited to 'src/mesa/drivers/svga/svgamesa8.c')
| -rw-r--r-- | src/mesa/drivers/svga/svgamesa8.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/src/mesa/drivers/svga/svgamesa8.c b/src/mesa/drivers/svga/svgamesa8.c new file mode 100644 index 00000000000..ed613735592 --- /dev/null +++ b/src/mesa/drivers/svga/svgamesa8.c @@ -0,0 +1,159 @@ +/* $Id: svgamesa8.c,v 1.2 2000/01/22 20:08:36 brianp Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.2 + * Copyright (C) 1995-2000 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. + */ + + +/* + * SVGA driver for Mesa. + * Original author: Brian Paul + * Additional authors: Slawomir Szczyrba <[email protected]> (Mesa 3.2) + */ + + +#include "svgapix.h" + +int __svga_drawpixel8(int x, int y, unsigned long c) +{ + unsigned long offset; + + y = SVGAInfo->height-y-1; + offset = y * SVGAInfo->linewidth + x; + SVGABuffer.BackBuffer[offset]=c; + + return 0; +} + +unsigned long __svga_getpixel8(int x, int y) +{ + unsigned long offset; + + y = SVGAInfo->height-y-1; + offset = y * SVGAInfo->linewidth + x; + return SVGABuffer.BackBuffer[offset]; +} + +void __set_index8( GLcontext *ctx, GLuint index ) +{ + SVGAMesa->index = index; +} + +void __clear_index8( GLcontext *ctx, GLuint index ) +{ + SVGAMesa->clear_index = index; +} + +GLbitfield __clear8( GLcontext *ctx, GLbitfield mask, GLboolean all, + GLint x, GLint y, GLint width, GLint height ) +{ + int i,j; + + if (mask & GL_COLOR_BUFFER_BIT) { + + if (all) + { + memset(SVGABuffer.BackBuffer,SVGAMesa->clear_index,SVGABuffer.BufferSize); + } else { + for (i=x;i<width;i++) + for (j=y;j<height;j++) + __svga_drawpixel8(i,j,SVGAMesa->clear_index); + } + } + return mask & (~GL_COLOR_BUFFER_BIT); +} + +void __write_ci32_span8( const GLcontext *ctx, GLuint n, GLint x, GLint y, + const GLuint index[], const GLubyte mask[] ) +{ + int i; + for (i=0;i<n;i++,x++) { + if (mask[i]) { + __svga_drawpixel8( x, y, index[i]); + } + } +} + +void __write_ci8_span8( const GLcontext *ctx, GLuint n, GLint x, GLint y, + const GLubyte index[], const GLubyte mask[] ) +{ + int i; + + for (i=0;i<n;i++,x++) { + if (mask[i]) { + __svga_drawpixel8( x, y, index[i]); + } + } +} + +void __write_mono_ci_span8( const GLcontext *ctx, GLuint n, + GLint x, GLint y, const GLubyte mask[] ) +{ + int i; + for (i=0;i<n;i++,x++) { + if (mask[i]) { + __svga_drawpixel8( x, y, SVGAMesa->index); + } + } +} + +void __read_ci32_span8( const GLcontext *ctx, + GLuint n, GLint x, GLint y, GLuint index[]) +{ + int i; + for (i=0; i<n; i++,x++) { + index[i] = __svga_getpixel8( x, y); + } +} + +void __write_ci32_pixels8( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + const GLuint index[], const GLubyte mask[] ) +{ + int i; + for (i=0; i<n; i++) { + if (mask[i]) { + __svga_drawpixel8( x[i], y[i], index[i]); + } + } +} + + +void __write_mono_ci_pixels8( const GLcontext *ctx, GLuint n, + const GLint x[], const GLint y[], + const GLubyte mask[] ) +{ + int i; + for (i=0; i<n; i++) { + if (mask[i]) { + __svga_drawpixel8( x[i], y[i], SVGAMesa->index); + } + } +} + +void __read_ci32_pixels8( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + GLuint index[], const GLubyte mask[] ) +{ + int i; + for (i=0; i<n; i++,x++) { + index[i] = __svga_getpixel8( x[i], y[i]); + } +} + |