diff options
Diffstat (limited to 'src/mesa/drivers/svga/svgamesa24.c')
| -rw-r--r-- | src/mesa/drivers/svga/svgamesa24.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/mesa/drivers/svga/svgamesa24.c b/src/mesa/drivers/svga/svgamesa24.c new file mode 100644 index 0000000000..6e31c06713 --- /dev/null +++ b/src/mesa/drivers/svga/svgamesa24.c @@ -0,0 +1,201 @@ +/* $Id: svgamesa24.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 <steev@hot.pl> (Mesa 3.2) + */ + + +#include "svgapix.h" + +_RGB * rgbBuffer; + +inline int RGB2BGR24(int c) +{ + asm("rorw $8, %0\n" + "rorl $16, %0\n" + "rorw $8, %0\n" + "shrl $8, %0\n" + : "=q"(c):"0"(c)); + return c; +} + + +int __svga_drawpixel24(int x, int y, GLubyte r, GLubyte g, GLubyte b) +{ + unsigned long offset; + + rgbBuffer=(void *)SVGABuffer.BackBuffer; + y = SVGAInfo->height-y-1; + offset = y * SVGAInfo->width + x; + + rgbBuffer[offset].r=r; + rgbBuffer[offset].g=g; + rgbBuffer[offset].b=b; + + return 0; +} + +unsigned long __svga_getpixel24(int x, int y) +{ + unsigned long offset; + + rgbBuffer=(void *)SVGABuffer.BackBuffer; + y = SVGAInfo->height-y-1; + offset = y * SVGAInfo->width + x; + return rgbBuffer[offset].r<<16 | rgbBuffer[offset].g<<8 | rgbBuffer[offset].b; +} + +void __set_color24( GLcontext *ctx, + GLubyte red, GLubyte green, + GLubyte blue, GLubyte alpha ) +{ + SVGAMesa->red = red; + SVGAMesa->green = green; + SVGAMesa->blue = blue; +/* SVGAMesa->truecolor = red<<16 | green<<8 | blue; */ +} + +void __clear_color24( GLcontext *ctx, + GLubyte red, GLubyte green, + GLubyte blue, GLubyte alpha ) +{ + SVGAMesa->clear_red = red; + SVGAMesa->clear_green = green; + SVGAMesa->clear_blue = blue; +/* SVGAMesa->clear_truecolor = red<<16 | green<<8 | blue; */ +} + +GLbitfield __clear24( 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) { + rgbBuffer=(void *)SVGABuffer.BackBuffer; + for (i=0;i<SVGABuffer.BufferSize / 3;i++) + { + rgbBuffer[i].r=SVGAMesa->clear_red; + rgbBuffer[i].g=SVGAMesa->clear_green; + rgbBuffer[i].b=SVGAMesa->clear_blue; + } + } else { + for (i=x;i<width;i++) + for (j=y;j<height;j++) + __svga_drawpixel24( i, j, SVGAMesa->clear_red, + SVGAMesa->clear_green, + SVGAMesa->clear_blue); + } + } + return mask & (~GL_COLOR_BUFFER_BIT); +} + +void __write_rgba_span24( const GLcontext *ctx, GLuint n, GLint x, GLint y, + const GLubyte rgba[][4], const GLubyte mask[] ) +{ + int i; + if (mask) { + /* draw some pixels */ + for (i=0; i<n; i++, x++) { + if (mask[i]) { + __svga_drawpixel24( x, y, rgba[i][RCOMP], + rgba[i][GCOMP], + rgba[i][BCOMP]); + } + } + } + else { + /* draw all pixels */ + for (i=0; i<n; i++, x++) { + __svga_drawpixel24( x, y, rgba[i][RCOMP], + rgba[i][GCOMP], + rgba[i][BCOMP]); + } + } +} + +void __write_mono_rgba_span24( 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_drawpixel24( x, y, SVGAMesa->red, + SVGAMesa->green, + SVGAMesa->blue); + } + } +} + +void __read_rgba_span24( const GLcontext *ctx, GLuint n, GLint x, GLint y, + GLubyte rgba[][4] ) +{ + int i; + for (i=0; i<n; i++, x++) { + *((GLint*)rgba[i]) = RGB2BGR24(__svga_getpixel24( x, y)); + } +} + +void __write_rgba_pixels24( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + const GLubyte rgba[][4], const GLubyte mask[] ) +{ + int i; + for (i=0; i<n; i++) { + if (mask[i]) { + __svga_drawpixel24( x[i], y[i], rgba[i][RCOMP], + rgba[i][GCOMP], + rgba[i][BCOMP]); + } + } +} + +void __write_mono_rgba_pixels24( const GLcontext *ctx, + GLuint n, + const GLint x[], const GLint y[], + const GLubyte mask[] ) +{ + int i; + /* use current rgb color */ + for (i=0; i<n; i++) { + if (mask[i]) { + __svga_drawpixel24( x[i], y[i], SVGAMesa->red, + SVGAMesa->green, + SVGAMesa->blue); + } + } +} + +void __read_rgba_pixels24( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + GLubyte rgba[][4], const GLubyte mask[] ) +{ + int i; + for (i=0; i<n; i++,x++) { + *((GLint*)rgba[i]) = RGB2BGR24(__svga_getpixel24( x[i], y[i])); + } +} |