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/* $Id: svgamesa32.c,v 1.10 2001/02/06 00:03:48 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.3
* 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 HAVE_CONFIG_H
#include "conf.h"
#endif
#ifdef SVGA
#include "svgapix.h"
#include "svgamesa32.h"
#include "swrast/swrast.h"
#if 0
/* this doesn't compile with GCC on RedHat 6.1 */
static 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
static unsigned long RGB2BGR32(unsigned long color)
{
return (color & 0xff00)|(color>>16)|((color & 0xff)<<16);
}
#endif
static void __svga_drawpixel32(int x, int y, unsigned long c)
{
unsigned long offset;
GLint *intBuffer=(void *)SVGABuffer.DrawBuffer;
y = SVGAInfo->height-y-1;
offset = y * SVGAInfo->width + x;
intBuffer[offset]=c;
}
static unsigned long __svga_getpixel32(int x, int y)
{
unsigned long offset;
const GLint *intBuffer=(void *)SVGABuffer.ReadBuffer;
y = SVGAInfo->height-y-1;
offset = y * SVGAInfo->width + x;
return intBuffer[offset];
}
void __clear_color32( GLcontext *ctx, const GLchan color[4] )
{
SVGAMesa->clear_truecolor = (color[0] << 16) | (color[1] << 8) | color[2];
}
void __clear32( GLcontext *ctx, GLbitfield mask, GLboolean all,
GLint x, GLint y, GLint width, GLint height )
{
int i,j;
if (mask & DD_FRONT_LEFT_BIT) {
if (all) {
GLint *intBuffer=(void *)SVGABuffer.FrontBuffer;
for (i=0;i<SVGABuffer.BufferSize / 4;i++)
intBuffer[i]=SVGAMesa->clear_truecolor;
}
else {
GLubyte *tmp = SVGABuffer.DrawBuffer;
SVGABuffer.DrawBuffer = SVGABuffer.FrontBuffer;
for (i=x;i<width;i++)
for (j=y;j<height;j++)
__svga_drawpixel32(i,j,SVGAMesa->clear_truecolor);
SVGABuffer.DrawBuffer = tmp;
}
mask &= ~DD_FRONT_LEFT_BIT;
}
if (mask & DD_BACK_LEFT_BIT) {
if (all) {
GLint *intBuffer=(void *)SVGABuffer.BackBuffer;
for (i=0;i<SVGABuffer.BufferSize / 4;i++)
intBuffer[i]=SVGAMesa->clear_truecolor;
}
else {
GLubyte *tmp = SVGABuffer.DrawBuffer;
SVGABuffer.DrawBuffer = SVGABuffer.BackBuffer;
for (i=x;i<width;i++)
for (j=y;j<height;j++)
__svga_drawpixel32(i,j,SVGAMesa->clear_truecolor);
SVGABuffer.DrawBuffer = tmp;
}
mask &= ~DD_BACK_LEFT_BIT;
}
if (mask)
_swrast_Clear( ctx, mask, all, x, y, width, height );
}
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 GLchan color[4], const GLubyte mask[])
{
int i;
GLuint truecolor = color[RCOMP]<<16 | color[GCOMP]<<8 | color[BCOMP];
for (i=0; i<n; i++, x++) {
if (mask[i]) {
__svga_drawpixel32( x, y, 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 GLchan color[4], const GLubyte mask[] )
{
GLuint truecolor = color[RCOMP]<<16 | color[GCOMP]<<8 | color[BCOMP];
int i;
for (i=0; i<n; i++) {
if (mask[i]) {
__svga_drawpixel32( x[i], y[i], 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] ));
}
}
#else
/* silence compiler warning */
extern void _mesa_svga32_dummy_function(void);
void _mesa_svga32_dummy_function(void)
{
}
#endif
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