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/* -*- mode: c; c-basic-offset: 3 -*-
*
* Copyright 2000 VA Linux Systems Inc., Fremont, California.
*
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* \file tdfx_dd.c
* Device driver interface functions for 3Dfx based cards.
*
* \author Gareth Hughes <gareth@valinux.com> (Original rewrite 29 Sep - 1 Oct 2000)
* \author Brian Paul <brianp@valinux.com>
*/
#include "tdfx_context.h"
#include "tdfx_dd.h"
#include "tdfx_lock.h"
#include "tdfx_pixels.h"
#include "utils.h"
#include "main/context.h"
#define DRIVER_DATE "20061113"
/* These are used in calls to FX_grColorMaskv() */
const GLboolean false4[4] = { GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE };
const GLboolean true4[4] = { GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE };
/* KW: Put the word Mesa in the render string because quakeworld
* checks for this rather than doing a glGet(GL_MAX_TEXTURE_SIZE).
* Why?
*/
static const GLubyte *tdfxDDGetString( struct gl_context *ctx, GLenum name )
{
tdfxContextPtr fxMesa = (tdfxContextPtr) ctx->DriverCtx;
switch (name) {
case GL_RENDERER:
{
/* The renderer string must be per-context state to handle
* multihead correctly.
*/
char *const buffer = fxMesa->rendererString;
char hardware[64];
LOCK_HARDWARE(fxMesa);
strncpy(hardware, fxMesa->Glide.grGetString(GR_HARDWARE),
sizeof(hardware));
hardware[sizeof(hardware) - 1] = '\0';
UNLOCK_HARDWARE(fxMesa);
if ((strncmp(hardware, "Voodoo3", 7) == 0)
|| (strncmp(hardware, "Voodoo4", 7) == 0)
|| (strncmp(hardware, "Voodoo5", 7) == 0)) {
hardware[7] = '\0';
}
else if (strncmp(hardware, "Voodoo Banshee", 14) == 0) {
strcpy(&hardware[6], "Banshee");
}
else {
/* unexpected result: replace spaces with hyphens */
int i;
for (i = 0; i < sizeof(hardware) && hardware[i]; i++) {
if (hardware[i] == ' ' || hardware[i] == '\t') {
hardware[i] = '-';
}
}
}
(void) driGetRendererString(buffer, hardware, DRIVER_DATE, 0);
return (const GLubyte *) buffer;
}
case GL_VENDOR:
return (const GLubyte *)"VA Linux Systems, Inc.";
default:
return NULL;
}
}
static void
tdfxBeginQuery(struct gl_context *ctx, struct gl_query_object *q)
{
tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
(void) q;
if (q->Target == GL_SAMPLES_PASSED_ARB) {
LOCK_HARDWARE(fxMesa);
fxMesa->Glide.grFinish();
fxMesa->Glide.grReset(GR_STATS_PIXELS);
UNLOCK_HARDWARE(fxMesa);
}
}
static void
tdfxEndQuery(struct gl_context *ctx, struct gl_query_object *q)
{
tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
FxI32 total_pixels;
FxI32 z_fail_pixels;
if (q->Target == GL_SAMPLES_PASSED_ARB) {
LOCK_HARDWARE(fxMesa);
fxMesa->Glide.grFinish();
fxMesa->Glide.grGet(GR_STATS_PIXELS_DEPTHFUNC_FAIL, sizeof(FxI32),
&z_fail_pixels);
fxMesa->Glide.grGet(GR_STATS_PIXELS_IN, sizeof(FxI32), &total_pixels);
q->Result = total_pixels - z_fail_pixels;
/* Apparently, people have seen z_fail_pixels > total_pixels under
* some conditions on some 3Dfx hardware. The occlusion query spec
* requires that we clamp to 0.
*/
if (q->Result < 0) {
q->Result = 0;
}
q->Ready = GL_TRUE;
UNLOCK_HARDWARE(fxMesa);
}
}
#define VISUAL_EQUALS_RGBA(vis, r, g, b, a) \
((vis->redBits == r) && \
(vis->greenBits == g) && \
(vis->blueBits == b) && \
(vis->alphaBits == a))
void tdfxDDInitDriverFuncs( const struct gl_config *visual,
struct dd_function_table *functions )
{
if ( MESA_VERBOSE & VERBOSE_DRIVER ) {
fprintf( stderr, "tdfx: %s()\n", __FUNCTION__ );
}
functions->GetString = tdfxDDGetString;
functions->BeginQuery = tdfxBeginQuery;
functions->EndQuery = tdfxEndQuery;
/* Accelerated paths
*/
if ( VISUAL_EQUALS_RGBA(visual, 8, 8, 8, 8) )
{
functions->DrawPixels = tdfx_drawpixels_R8G8B8A8;
functions->ReadPixels = tdfx_readpixels_R8G8B8A8;
}
else if ( VISUAL_EQUALS_RGBA(visual, 5, 6, 5, 0) )
{
functions->ReadPixels = tdfx_readpixels_R5G6B5;
}
}
/*
* These are here for lack of a better place.
*/
void
FX_grColorMaskv(struct gl_context *ctx, const GLboolean rgba[4])
{
tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
LOCK_HARDWARE(fxMesa);
if (ctx->Visual.redBits == 8) {
/* 32bpp mode */
ASSERT( fxMesa->Glide.grColorMaskExt );
fxMesa->Glide.grColorMaskExt(rgba[RCOMP], rgba[GCOMP],
rgba[BCOMP], rgba[ACOMP]);
}
else {
/* 16 bpp mode */
/* we never have an alpha buffer */
fxMesa->Glide.grColorMask(rgba[RCOMP] || rgba[GCOMP] || rgba[BCOMP],
GL_FALSE);
}
UNLOCK_HARDWARE(fxMesa);
}
void
FX_grColorMaskv_NoLock(struct gl_context *ctx, const GLboolean rgba[4])
{
tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
if (ctx->Visual.redBits == 8) {
/* 32bpp mode */
ASSERT( fxMesa->Glide.grColorMaskExt );
fxMesa->Glide.grColorMaskExt(rgba[RCOMP], rgba[GCOMP],
rgba[BCOMP], rgba[ACOMP]);
}
else {
/* 16 bpp mode */
/* we never have an alpha buffer */
fxMesa->Glide.grColorMask(rgba[RCOMP] || rgba[GCOMP] || rgba[BCOMP],
GL_FALSE);
}
}
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