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* Mesa 3-D graphics library
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* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "glxheader.h"
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#include "../glide/fxdrv.h"
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FXcreateContext(XMesaVisual v, XMesaWindow w, XMesaContext c, XMesaBuffer b)
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char *fxEnvVar = _mesa_getenv("MESA_GLX_FX");
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if (fxEnvVar[0]!='d') {
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if (v->mesa_visual.depthBits > 0) {
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attribs[numAttribs++] = FXMESA_DEPTH_SIZE;
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attribs[numAttribs++] = v->mesa_visual.depthBits;
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if (v->mesa_visual.doubleBufferMode) {
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attribs[numAttribs++] = FXMESA_DOUBLEBUFFER;
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if (v->mesa_visual.accumRedBits > 0) {
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attribs[numAttribs++] = FXMESA_ACCUM_SIZE;
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attribs[numAttribs++] = v->mesa_visual.accumRedBits;
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if (v->mesa_visual.stencilBits > 0) {
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attribs[numAttribs++] = FXMESA_STENCIL_SIZE;
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attribs[numAttribs++] = v->mesa_visual.stencilBits;
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if (v->mesa_visual.alphaBits > 0) {
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attribs[numAttribs++] = FXMESA_ALPHA_SIZE;
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attribs[numAttribs++] = v->mesa_visual.alphaBits;
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attribs[numAttribs++] = FXMESA_SHARE_CONTEXT;
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attribs[numAttribs++] = (int) &(c->mesa);
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attribs[numAttribs++] = FXMESA_NONE;
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/* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */
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hw = fxMesaSelectCurrentBoard(0);
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/* if these fail, there's a new bug somewhere */
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ASSERT(b->mesa_buffer.Width > 0);
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ASSERT(b->mesa_buffer.Height > 0);
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if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) {
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b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width,
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b->mesa_buffer.Height, attribs);
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if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) {
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b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE;
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if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) {
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b->FXwindowHack = GL_TRUE;
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FX_grSstControl(GR_CONTROL_DEACTIVATE);
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b->FXwindowHack = GL_FALSE;
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if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')
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b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE,
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GR_REFRESH_75Hz, attribs);
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b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width,
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b->mesa_buffer.Height, attribs);
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b->FXisHackUsable = GL_FALSE;
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b->FXwindowHack = GL_FALSE;
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"voodoo %d, wid %d height %d hack: usable %d active %d\n",
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hw, b->mesa_buffer.Width, b->mesa_buffer.Height,
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b->FXisHackUsable, b->FXwindowHack);
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_mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n");
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_mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n");
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_mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n");
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_mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n");
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void FXdestroyContext( XMesaBuffer b )
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fxMesaDestroyContext(b->FXctx);
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GLboolean FXmakeCurrent( XMesaBuffer b )
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fxMesaMakeCurrent(b->FXctx);
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* Read image from VooDoo frame buffer into X/Mesa's back XImage.
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static void FXgetImage( XMesaBuffer b )
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GET_CURRENT_CONTEXT(ctx);
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static unsigned short pixbuf[MAX_WIDTH];
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GLuint width, height;
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x = b->frontxrb->pixmap->x;
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y = b->frontxrb->pixmap->y;
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width = b->frontxrb->pixmap->width;
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height = b->frontxrb->pixmap->height;
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depth = b->frontxrb->pixmap->depth;
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xmesa_get_window_size(b->display, b, &width, &height);
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if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) {
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b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width);
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b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height);
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if (b->mesa_buffer.Width & 1)
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b->mesa_buffer.Width--; /* prevent odd width */
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/* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */
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/* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */
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if (b->xm_visual->undithered_pf==PF_5R6G5B) {
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/* Special case: 16bpp RGB */
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grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */
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0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/
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b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */
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b->mesa_buffer.Width * sizeof(GLushort), /* stride */
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b->backxrb->ximage->data); /* dest buffer */
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else if (b->xm_visual->dithered_pf==PF_Dither
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&& GET_VISUAL_DEPTH(b->xm_visual)==8) {
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/* Special case: 8bpp RGB */
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for (y=0;y<b->mesa_buffer.Height;y++) {
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GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data
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+ b->backxrb->ximage->bytes_per_line * y;
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/* read row from 3Dfx frame buffer */
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grLfbReadRegion( GR_BUFFER_FRONTBUFFER,
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0, b->FXctx->height-(b->mesa_buffer.Height-y),
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b->mesa_buffer.Width, 1,
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/* write to XImage back buffer */
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for (x=0;x<b->mesa_buffer.Width;x++) {
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GLubyte r = (pixbuf[x] & 0xf800) >> 8;
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GLubyte g = (pixbuf[x] & 0x07e0) >> 3;
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GLubyte b = (pixbuf[x] & 0x001f) << 3;
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*ptr++ = XDITHER( x, r, g, b);
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/* General case: slow! */
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for (y=0;y<b->mesa_buffer.Height;y++) {
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/* read row from 3Dfx frame buffer */
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grLfbReadRegion( GR_BUFFER_FRONTBUFFER,
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0, b->FXctx->height-(b->mesa_buffer.Height-y),
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b->mesa_buffer.Width, 1,
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/* write to XImage back buffer */
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for (x=0;x<b->mesa_buffer.Width;x++) {
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XMesaPutPixel(b->backxrb->ximage,x,y,
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xmesa_color_to_pixel(ctx,
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(pixbuf[x] & 0xf800) >> 8,
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(pixbuf[x] & 0x07e0) >> 3,
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(pixbuf[x] & 0x001f) << 3,
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b->xm_visual->undithered_pf));
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/* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */
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GLboolean FXswapBuffers( XMesaBuffer b )
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if (!b->FXwindowHack)
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* Switch 3Dfx support hack between window and full-screen mode.
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GLboolean XMesaSetFXmode( GLint mode )
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const char *fx = _mesa_getenv("MESA_GLX_FX");
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if (fx && fx[0] != 'd') {
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GET_CURRENT_CONTEXT(ctx);
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GrHwConfiguration hw;
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if (!FX_grSstQueryHardware(&hw)) {
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/*fprintf(stderr, "!grSstQueryHardware\n");*/
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if (hw.num_sst < 1) {
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/*fprintf(stderr, "hw.num_sst < 1\n");*/
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/* [dBorca] Hack alert:
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* oh, this is sooo wrong: ctx above is
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* really an fxMesaContext, not an XMesaContext
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XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
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if (mode == XMESA_FX_WINDOW) {
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if (xmbuf->FXisHackUsable) {
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FX_grSstControl(GR_CONTROL_DEACTIVATE);
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xmbuf->FXwindowHack = GL_TRUE;
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else if (mode == XMESA_FX_FULLSCREEN) {
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FX_grSstControl(GR_CONTROL_ACTIVATE);
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xmbuf->FXwindowHack = GL_FALSE;
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/* Error: Bad mode value */
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/*fprintf(stderr, "fallthrough\n");*/