diff options
Diffstat (limited to 'src/mesa/drivers/svga/svgamesa16.c')
| -rw-r--r-- | src/mesa/drivers/svga/svgamesa16.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/mesa/drivers/svga/svgamesa16.c b/src/mesa/drivers/svga/svgamesa16.c new file mode 100644 index 00000000000..423483dca0c --- /dev/null +++ b/src/mesa/drivers/svga/svgamesa16.c @@ -0,0 +1,178 @@ +/* $Id: svgamesa16.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" + +GLshort * shortBuffer; + +int __svga_drawpixel16(int x, int y, unsigned long c) +{ + unsigned long offset; + + shortBuffer=(void *)SVGABuffer.BackBuffer; + y = SVGAInfo->height-y-1; + offset = y * SVGAInfo->width + x; + shortBuffer[offset]=c; + return 0; +} + +unsigned long __svga_getpixel16(int x, int y) +{ + unsigned long offset; + + shortBuffer=(void *)SVGABuffer.BackBuffer; + y = SVGAInfo->height-y-1; + offset = y * SVGAInfo->width + x; + return shortBuffer[offset]; +} + +void __set_color16( GLcontext *ctx, + GLubyte red, GLubyte green, + GLubyte blue, GLubyte alpha ) +{ + SVGAMesa->hicolor=(red>>3)<<11 | (green>>2)<<5 | (blue>>3); +/* SVGAMesa->hicolor=(red)<<11 | (green)<<5 | (blue); */ +} + +void __clear_color16( GLcontext *ctx, + GLubyte red, GLubyte green, + GLubyte blue, GLubyte alpha ) +{ + SVGAMesa->clear_hicolor=(red>>3)<<11 | (green>>2)<<5 | (blue>>3); +/* SVGAMesa->clear_hicolor=(red)<<11 | (green)<<5 | (blue); */ +} + +GLbitfield __clear16( 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) { + shortBuffer=(void *)SVGABuffer.BackBuffer; + for (i=0;i<SVGABuffer.BufferSize / 2;i++) shortBuffer[i]=SVGAMesa->clear_hicolor; + } else { + for (i=x;i<width;i++) + for (j=y;j<height;j++) + __svga_drawpixel16(i,j,SVGAMesa->clear_hicolor); + } + } + return mask & (~GL_COLOR_BUFFER_BIT); +} + +void __write_rgba_span16( 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_drawpixel16( x, y, (rgba[i][RCOMP]>>3)<<11 | \ + (rgba[i][GCOMP]>>2)<<5 | \ + (rgba[i][BCOMP]>>3)); + } + } + } + else { + /* draw all pixels */ + for (i=0; i<n; i++, x++) { + __svga_drawpixel16( x, y, (rgba[i][RCOMP]>>3)<<11 | \ + (rgba[i][GCOMP]>>2)<<5 | \ + (rgba[i][BCOMP]>>3)); + } + } +} + +void __write_mono_rgba_span16( 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_drawpixel16( x, y, SVGAMesa->hicolor); + } + } +} + +void __read_rgba_span16( const GLcontext *ctx, GLuint n, GLint x, GLint y, + GLubyte rgba[][4] ) +{ + int i,pix; + for (i=0; i<n; i++, x++) { + pix = __svga_getpixel16( x, y ); + rgba[i][RCOMP] = ((pix>>11)<<3) & 0xff; + rgba[i][GCOMP] = ((pix>> 5)<<2) & 0xff; + rgba[i][BCOMP] = ((pix )<<3) & 0xff; + } +} + +void __write_rgba_pixels16( 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_drawpixel16( x[i], y[i], (rgba[i][RCOMP]>>3)<<11 | \ + (rgba[i][GCOMP]>>2)<<5 | \ + (rgba[i][BCOMP]>>3)); + } + } +} + + +void __write_mono_rgba_pixels16( 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_drawpixel16( x[i], y[i], SVGAMesa->hicolor ); + } + } +} + +void __read_rgba_pixels16( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + GLubyte rgba[][4], const GLubyte mask[] ) +{ + int i,pix; + for (i=0; i<n; i++,x++) { + pix = __svga_getpixel16( x[i], y[i] ); + rgba[i][RCOMP] = ((pix>>11)<<3) & 0xff; + rgba[i][GCOMP] = ((pix>> 5)<<2) & 0xff; + rgba[i][BCOMP] = ((pix )<<3) & 0xff; + } +} |