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/* $Id: svgamesa32.c,v 1.3 2000/01/23 17:49:54 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)
*/
#ifdef SVGA
#include "svgapix.h"
GLint * intBuffer;
#if 0
inline int RGB2BGR32(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;
}
#else
int RGB2BGR32(int c)
{
/* XXX this isn't right */
return c;
}
#endif
int __svga_drawpixel32(int x, int y, unsigned long c)
{
unsigned long offset;
intBuffer=(void *)SVGABuffer.BackBuffer;
y = SVGAInfo->height-y-1;
offset = y * SVGAInfo->width + x;
intBuffer[offset]=c;
return 0;
}
unsigned long __svga_getpixel32(int x, int y)
{
unsigned long offset;
intBuffer=(void *)SVGABuffer.BackBuffer;
y = SVGAInfo->height-y-1;
offset = y * SVGAInfo->width + x;
return intBuffer[offset];
}
void __set_color32( 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_color32( GLcontext *ctx,
GLubyte red, GLubyte green,
GLubyte blue, GLubyte alpha )
{
SVGAMesa->clear_truecolor = red<<16 | green<<8 | blue;
}
GLbitfield __clear32( 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) {
intBuffer=(void *)SVGABuffer.BackBuffer;
for (i=0;i<SVGABuffer.BufferSize / 4;i++) intBuffer[i]=SVGAMesa->clear_truecolor;
} else {
for (i=x;i<width;i++)
for (j=y;j<height;j++)
__svga_drawpixel32(i,j,SVGAMesa->clear_truecolor);
}
}
return mask & (~GL_COLOR_BUFFER_BIT);
}
void __write_rgba_span32( 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_drawpixel32( x, y, RGB2BGR32(*((GLint*)rgba[i])));
}
}
}
else {
/* draw all pixels */
for (i=0; i<n; i++, x++) {
__svga_drawpixel32( x, y, RGB2BGR32(*((GLint*)rgba[i])));
}
}
}
void __write_mono_rgba_span32( 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_drawpixel32( x, y, SVGAMesa->truecolor);
}
}
}
void __read_rgba_span32( const GLcontext *ctx, GLuint n, GLint x, GLint y,
GLubyte rgba[][4] )
{
int i;
for (i=0; i<n; i++, x++) {
*((GLint*)rgba[i]) = RGB2BGR32(__svga_getpixel32( x, y ));
}
}
void __write_rgba_pixels32( 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_drawpixel32( x[i], y[i], RGB2BGR32(*((GLint*)rgba[i])));
}
}
}
void __write_mono_rgba_pixels32( 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_drawpixel32( x[i], y[i], SVGAMesa->truecolor );
}
}
}
void __read_rgba_pixels32( 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]) = RGB2BGR32(__svga_getpixel32( x[i], y[i] ));
}
}
#endif
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