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/* $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 <steev@hot.pl> (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]);
}
}
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