source: branches/swt/src/opengl/mesa/3dfx/fxdd.c

Last change on this file was 3598, checked in by jeroen, 26 years ago

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1/* -*- mode: C; tab-width:8; c-basic-offset:2 -*- */
2
3/*
4 * Mesa 3-D graphics library
5 * Version: 3.3
6 *
7 * Copyright (C) 1999 Brian Paul All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 *
27 * Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the
28 * terms stated above.
29 *
30 * Thank you for your contribution, David!
31 *
32 * Please make note of the above copyright/license statement. If you
33 * contributed code or bug fixes to this code under the previous (GNU
34 * Library) license and object to the new license, your code will be
35 * removed at your request. Please see the Mesa docs/COPYRIGHT file
36 * for more information.
37 *
38 * Additional Mesa/3Dfx driver developers:
39 * Daryll Strauss <daryll@precisioninsight.com>
40 * Keith Whitwell <keith@precisioninsight.com>
41 *
42 * See fxapi.h for more revision/author details.
43 */
44
45
46/* fxdd.c - 3Dfx VooDoo Mesa device driver functions */
47
48
49#ifdef HAVE_CONFIG_H
50#include "conf.h"
51#endif
52
53#if defined(FX)
54
55#include "image.h"
56#include "types.h"
57#include "fxdrv.h"
58#include "enums.h"
59#include "extensions.h"
60#include "pb.h"
61
62/* These lookup table are used to extract RGB values in [0,255] from
63 * 16-bit pixel values.
64 */
65GLubyte FX_PixelToR[0x10000];
66GLubyte FX_PixelToG[0x10000];
67GLubyte FX_PixelToB[0x10000];
68
69
70/*
71 * Initialize the FX_PixelTo{RGB} arrays.
72 * Input: bgrOrder - if TRUE, pixels are in BGR order, else RGB order.
73 */
74void fxInitPixelTables(fxMesaContext fxMesa, GLboolean bgrOrder)
75{
76 GLuint pixel;
77
78 fxMesa->bgrOrder=bgrOrder;
79 for (pixel = 0; pixel <= 0xffff; pixel++) {
80 GLuint r, g, b;
81 if (bgrOrder) {
82 r = (pixel & 0x001F) << 3;
83 g = (pixel & 0x07E0) >> 3;
84 b = (pixel & 0xF800) >> 8;
85 }
86 else {
87 r = (pixel & 0xF800) >> 8;
88 g = (pixel & 0x07E0) >> 3;
89 b = (pixel & 0x001F) << 3;
90 }
91 r = r * 255 / 0xF8; /* fill in low-order bits */
92 g = g * 255 / 0xFC;
93 b = b * 255 / 0xF8;
94 FX_PixelToR[pixel] = r;
95 FX_PixelToG[pixel] = g;
96 FX_PixelToB[pixel] = b;
97 }
98}
99
100
101/**********************************************************************/
102/***** Miscellaneous functions *****/
103/**********************************************************************/
104
105/* Enalbe/Disable dithering */
106static void fxDDDither(GLcontext *ctx, GLboolean enable)
107{
108 if (MESA_VERBOSE&VERBOSE_DRIVER) {
109 fprintf(stderr,"fxmesa: fxDDDither()\n");
110 }
111
112 if (enable) {
113 FX_grDitherMode(GR_DITHER_4x4);
114 } else {
115 FX_grDitherMode(GR_DITHER_DISABLE);
116 }
117}
118
119
120/* Return buffer size information */
121static void fxDDBufferSize(GLcontext *ctx, GLuint *width, GLuint *height)
122{
123 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
124
125 if (MESA_VERBOSE&VERBOSE_DRIVER) {
126 fprintf(stderr,"fxmesa: fxDDBufferSize(...) Start\n");
127 }
128
129 *width=fxMesa->width;
130 *height=fxMesa->height;
131
132 if (MESA_VERBOSE&VERBOSE_DRIVER) {
133 fprintf(stderr,"fxmesa: fxDDBufferSize(...) End\n");
134 }
135}
136
137
138/* Set current drawing color */
139static void fxDDSetColor(GLcontext *ctx, GLubyte red, GLubyte green,
140 GLubyte blue, GLubyte alpha )
141{
142 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
143 GLubyte col[4];
144 ASSIGN_4V( col, red, green, blue, alpha );
145
146 if (MESA_VERBOSE&VERBOSE_DRIVER) {
147 fprintf(stderr,"fxmesa: fxDDSetColor(%d,%d,%d,%d)\n",red,green,blue,alpha);
148 }
149
150 fxMesa->color=FXCOLOR4(col);
151}
152
153
154/* Implements glClearColor() */
155static void fxDDClearColor(GLcontext *ctx, GLubyte red, GLubyte green,
156 GLubyte blue, GLubyte alpha )
157{
158 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
159 GLubyte col[4];
160
161
162
163 ASSIGN_4V( col, red, green, blue, 255 );
164
165 if (MESA_VERBOSE&VERBOSE_DRIVER) {
166 fprintf(stderr,"fxmesa: fxDDClearColor(%d,%d,%d,%d)\n",red,green,blue,alpha);
167 }
168
169 fxMesa->clearC=FXCOLOR4( col );
170 fxMesa->clearA=alpha;
171}
172
173/* Clear the color and/or depth buffers */
174static GLbitfield fxDDClear(GLcontext *ctx, GLbitfield mask, GLboolean all,
175 GLint x, GLint y, GLint width, GLint height )
176{
177 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
178 const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
179 const FxU16 clearD = (FxU16) (ctx->Depth.Clear * 0xffff);
180 GLbitfield softwareMask = mask & (DD_STENCIL_BIT | DD_ACCUM_BIT);
181
182 if (MESA_VERBOSE&VERBOSE_DRIVER) {
183 fprintf(stderr,"fxmesa: fxDDClear(%d,%d,%d,%d)\n",x,y,width,height);
184 }
185
186 if (colorMask != 0xffffffff) {
187 /* do color buffer clears in software */
188 softwareMask |= (mask & (DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT));
189 mask &= ~(DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT);
190 }
191
192 /*
193 * This could probably be done fancier but doing each possible case
194 * explicitly is less error prone.
195 */
196 switch (mask) {
197 case DD_BACK_LEFT_BIT | DD_DEPTH_BIT:
198 /* back buffer & depth */
199 FX_grDepthMask(FXTRUE);
200 FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
201 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
202 if (!ctx->Depth.Mask) {
203 FX_grDepthMask(FXFALSE);
204 }
205 break;
206 case DD_FRONT_LEFT_BIT | DD_DEPTH_BIT:
207 /* XXX it appears that the depth buffer isn't cleared when
208 * glRenderBuffer(GR_BUFFER_FRONTBUFFER) is set.
209 * This is a work-around/
210 */
211 /* clear depth */
212 FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
213 FX_grColorMask(FXFALSE,FXFALSE);
214 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
215 /* clear front */
216 FX_grColorMask(FXTRUE, ctx->Color.ColorMask[ACOMP] && fxMesa->haveAlphaBuffer);
217 FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
218 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
219 break;
220 case DD_BACK_LEFT_BIT:
221 /* back buffer only */
222 FX_grDepthMask(FXFALSE);
223 FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
224 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
225 if (!ctx->Depth.Mask) {
226 FX_grDepthMask(FXFALSE);
227 }
228 break;
229 case DD_FRONT_LEFT_BIT:
230 /* front buffer only */
231 FX_grDepthMask(FXFALSE);
232 FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
233 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
234 if (!ctx->Depth.Mask) {
235 FX_grDepthMask(FXFALSE);
236 }
237 break;
238 case DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT:
239 /* front and back */
240 FX_grDepthMask(FXFALSE);
241 FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
242 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
243 FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
244 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
245 if (!ctx->Depth.Mask) {
246 FX_grDepthMask(FXFALSE);
247 }
248 break;
249 case DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT | DD_DEPTH_BIT:
250 /* clear front */
251 FX_grDepthMask(FXFALSE);
252 FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
253 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
254 /* clear back and depth */
255 FX_grDepthMask(FXTRUE);
256 FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
257 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
258 if (!ctx->Depth.Mask) {
259 FX_grDepthMask(FXFALSE);
260 }
261 break;
262 case DD_DEPTH_BIT:
263 /* just the depth buffer */
264 FX_grColorMask(FXFALSE,FXFALSE);
265 FX_grBufferClear(fxMesa->clearC, fxMesa->clearA,
266 (FxU16)(ctx->Depth.Clear*0xffff));
267 FX_grColorMask(FXTRUE, ctx->Color.ColorMask[ACOMP] && fxMesa->haveAlphaBuffer);
268 break;
269 default:
270 /* error */
271 ;
272 }
273
274 return softwareMask;
275}
276
277
278/* Set the buffer used for reading */
279static GLboolean fxDDSetDrawBuffer(GLcontext *ctx, GLenum mode )
280{
281 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
282
283 if (MESA_VERBOSE&VERBOSE_DRIVER) {
284 fprintf(stderr,"fxmesa: fxDDSetBuffer(%x)\n",mode);
285 }
286
287 if (mode == GL_FRONT_LEFT) {
288 fxMesa->currentFB = GR_BUFFER_FRONTBUFFER;
289 FX_grRenderBuffer(fxMesa->currentFB);
290 return GL_TRUE;
291 }
292 else if (mode == GL_BACK_LEFT) {
293 fxMesa->currentFB = GR_BUFFER_BACKBUFFER;
294 FX_grRenderBuffer(fxMesa->currentFB);
295 return GL_TRUE;
296 }
297 else {
298 return GL_FALSE;
299 }
300}
301
302/* Set the buffer used for reading */
303static void fxDDSetReadBuffer(GLcontext *ctx, GLframebuffer *buffer,
304 GLenum mode )
305{
306 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
307 (void) buffer;
308
309 if (MESA_VERBOSE&VERBOSE_DRIVER) {
310 fprintf(stderr,"fxmesa: fxDDSetBuffer(%x)\n", (int) mode);
311 }
312
313 if (mode == GL_FRONT_LEFT) {
314 fxMesa->currentFB = GR_BUFFER_FRONTBUFFER;
315 FX_grRenderBuffer(fxMesa->currentFB);
316 }
317 else if (mode == GL_BACK_LEFT) {
318 fxMesa->currentFB = GR_BUFFER_BACKBUFFER;
319 FX_grRenderBuffer(fxMesa->currentFB);
320 }
321}
322
323
324
325#ifdef XF86DRI
326/* test if window coord (px,py) is visible */
327static GLboolean inClipRects(fxMesaContext fxMesa, int px, int py)
328{
329 int i;
330 for (i=0; i<fxMesa->numClipRects; i++) {
331 if ((px>=fxMesa->pClipRects[i].x1) &&
332 (px<fxMesa->pClipRects[i].x2) &&
333 (py>=fxMesa->pClipRects[i].y1) &&
334 (py<fxMesa->pClipRects[i].y2)) return GL_TRUE;
335 }
336 return GL_FALSE;
337}
338#endif
339
340
341static GLboolean fxDDDrawBitMap(GLcontext *ctx, GLint px, GLint py,
342 GLsizei width, GLsizei height,
343 const struct gl_pixelstore_attrib *unpack,
344 const GLubyte *bitmap)
345{
346 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
347 GrLfbInfo_t info;
348 FxU16 color;
349 const struct gl_pixelstore_attrib *finalUnpack;
350 struct gl_pixelstore_attrib scissoredUnpack;
351
352 /* check if there's any raster operations enabled which we can't handle */
353 if (ctx->RasterMask & (ALPHATEST_BIT |
354 BLEND_BIT |
355 DEPTH_BIT |
356 FOG_BIT |
357 LOGIC_OP_BIT |
358 SCISSOR_BIT |
359 STENCIL_BIT |
360 MASKING_BIT |
361 ALPHABUF_BIT |
362 MULTI_DRAW_BIT))
363 return GL_FALSE;
364
365 if (ctx->Scissor.Enabled) {
366 /* This is a bit tricky, but by carefully adjusting the px, py,
367 * width, height, skipPixels and skipRows values we can do
368 * scissoring without special code in the rendering loop.
369 */
370
371 /* we'll construct a new pixelstore struct */
372 finalUnpack = &scissoredUnpack;
373 scissoredUnpack = *unpack;
374 if (scissoredUnpack.RowLength == 0)
375 scissoredUnpack.RowLength = width;
376
377 /* clip left */
378 if (px < ctx->Scissor.X) {
379 scissoredUnpack.SkipPixels += (ctx->Scissor.X - px);
380 width -= (ctx->Scissor.X - px);
381 px = ctx->Scissor.X;
382 }
383 /* clip right */
384 if (px + width >= ctx->Scissor.X + ctx->Scissor.Width) {
385 width -= (px + width - (ctx->Scissor.X + ctx->Scissor.Width));
386 }
387 /* clip bottom */
388 if (py < ctx->Scissor.Y) {
389 scissoredUnpack.SkipRows += (ctx->Scissor.Y - py);
390 height -= (ctx->Scissor.Y - py);
391 py = ctx->Scissor.Y;
392 }
393 /* clip top */
394 if (py + height >= ctx->Scissor.Y + ctx->Scissor.Height) {
395 height -= (py + height - (ctx->Scissor.Y + ctx->Scissor.Height));
396 }
397
398 if (width <= 0 || height <= 0)
399 return GL_TRUE; /* totally scissored away */
400 }
401 else {
402 finalUnpack = unpack;
403 }
404
405 /* compute pixel value */
406 {
407 GLint r = (GLint) (ctx->Current.RasterColor[0] * 255.0f);
408 GLint g = (GLint) (ctx->Current.RasterColor[1] * 255.0f);
409 GLint b = (GLint) (ctx->Current.RasterColor[2] * 255.0f);
410 /*GLint a = (GLint)(ctx->Current.RasterColor[3]*255.0f);*/
411 if (fxMesa->bgrOrder)
412 color = (FxU16)
413 ( ((FxU16)0xf8 & b) << (11-3)) |
414 ( ((FxU16)0xfc & g) << (5-3+1)) |
415 ( ((FxU16)0xf8 & r) >> 3);
416 else
417 color = (FxU16)
418 ( ((FxU16)0xf8 & r) << (11-3)) |
419 ( ((FxU16)0xfc & g) << (5-3+1)) |
420 ( ((FxU16)0xf8 & b) >> 3);
421 }
422
423 info.size = sizeof(info);
424 if (!FX_grLfbLock(GR_LFB_WRITE_ONLY,
425 fxMesa->currentFB,
426 GR_LFBWRITEMODE_565,
427 GR_ORIGIN_UPPER_LEFT,
428 FXFALSE,
429 &info)) {
430#ifndef FX_SILENT
431 fprintf(stderr,"fx Driver: error locking the linear frame buffer\n");
432#endif
433 return GL_TRUE;
434 }
435
436#ifdef XF86DRI
437#define INSIDE(c, x, y) inClipRects((c), (x), (y))
438#else
439#define INSIDE(c, x, y) (1)
440#endif
441
442 {
443 const GLint winX = fxMesa->x_offset;
444 const GLint winY = fxMesa->y_offset + fxMesa->height - 1;
445 /* The dest stride depends on the hardware and whether we're drawing
446 * to the front or back buffer. This compile-time test seems to do
447 * the job for now.
448 */
449#ifdef XF86DRI
450 const GLint dstStride = (fxMesa->glCtx->Color.DrawBuffer == GL_FRONT)
451 ? (fxMesa->screen_width) : (info.strideInBytes / 2);
452#else
453 const GLint dstStride = info.strideInBytes / 2; /* stride in GLushorts */
454#endif
455 GLint row;
456 /* compute dest address of bottom-left pixel in bitmap */
457 GLushort *dst = (GLushort *) info.lfbPtr
458 + (winY - py) * dstStride
459 + (winX + px);
460
461 for (row = 0; row < height; row++) {
462 const GLubyte *src = (const GLubyte *) _mesa_image_address( finalUnpack,
463 bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
464 if (finalUnpack->LsbFirst) {
465 /* least significan bit first */
466 GLubyte mask = 1U << (finalUnpack->SkipPixels & 0x7);
467 GLint col;
468 for (col=0; col<width; col++) {
469 if (*src & mask) {
470 if (INSIDE(fxMesa, winX + px + col, winY - py - row))
471 dst[col] = color;
472 }
473 if (mask == 128U) {
474 src++;
475 mask = 1U;
476 }
477 else {
478 mask = mask << 1;
479 }
480 }
481 if (mask != 1)
482 src++;
483 }
484 else {
485 /* most significan bit first */
486 GLubyte mask = 128U >> (finalUnpack->SkipPixels & 0x7);
487 GLint col;
488 for (col=0; col<width; col++) {
489 if (*src & mask) {
490 if (INSIDE(fxMesa, winX + px + col, winY - py - row))
491 dst[col] = color;
492 }
493 if (mask == 1U) {
494 src++;
495 mask = 128U;
496 }
497 else {
498 mask = mask >> 1;
499 }
500 }
501 if (mask != 128)
502 src++;
503 }
504 dst -= dstStride;
505 }
506 }
507
508#undef INSIDE
509
510 FX_grLfbUnlock(GR_LFB_WRITE_ONLY,fxMesa->currentFB);
511 return GL_TRUE;
512}
513
514static void fxDDFinish(GLcontext *ctx)
515{
516 FX_grFlush();
517}
518
519
520static GLint fxDDGetParameteri(const GLcontext *ctx, GLint param)
521{
522 switch(param) {
523 case DD_HAVE_HARDWARE_FOG:
524 return 1;
525 default:
526 fprintf(stderr,"fx Driver: internal error in fxDDGetParameteri(): %x\n",param);
527 fxCloseHardware();
528 EXIT(-1);
529 return 0;
530 }
531}
532
533
534void fxDDSetNearFar(GLcontext *ctx, GLfloat n, GLfloat f)
535{
536 FX_CONTEXT(ctx)->new_state |= FX_NEW_FOG;
537 ctx->Driver.RenderStart = fxSetupFXUnits;
538}
539
540/* KW: Put the word Mesa in the render string because quakeworld
541 * checks for this rather than doing a glGet(GL_MAX_TEXTURE_SIZE).
542 * Why?
543 */
544static const GLubyte *fxDDGetString(GLcontext *ctx, GLenum name)
545{
546#if defined(GLX_DIRECT_RENDERING)
547 /* Building for DRI driver */
548 switch (name) {
549 case GL_RENDERER:
550 {
551 static char buffer[100];
552 char hardware[100];
553 strcpy(hardware, grGetString(GR_HARDWARE));
554 if (strcmp(hardware, "Voodoo3 (tm)") == 0)
555 strcpy(hardware, "Voodoo3");
556 else if (strcmp(hardware, "Voodoo Banshee (tm)") == 0)
557 strcpy(hardware, "VoodooBanshee");
558 else {
559 /* unexpected result: replace spaces with hyphens */
560 int i;
561 for (i = 0; hardware[i]; i++) {
562 if (hardware[i] == ' ' || hardware[i] == '\t')
563 hardware[i] = '-';
564 }
565 }
566 /* now make the GL_RENDERER string */
567 sprintf(buffer, "Mesa DRI %s 20000322", hardware);
568 return buffer;
569 }
570 case GL_VENDOR:
571 return "Precision Insight, Inc.";
572 default:
573 return NULL;
574 }
575
576#else
577
578 /* Building for Voodoo1/2 stand-alone Mesa */
579 switch (name) {
580 case GL_RENDERER:
581 {
582 static char buf[80];
583
584 if (glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_VOODOO) {
585 GrVoodooConfig_t *vc =
586 &glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig;
587
588 sprintf(buf,
589 "Mesa Glide v0.30 Voodoo_Graphics %d "
590 "CARD/%d FB/%d TM/%d TMU/%s",
591 glbCurrentBoard,
592 (vc->sliDetect ? (vc->fbRam*2) : vc->fbRam),
593 (vc->tmuConfig[GR_TMU0].tmuRam +
594 ((vc->nTexelfx>1) ? vc->tmuConfig[GR_TMU1].tmuRam : 0)),
595 vc->nTexelfx,
596 (vc->sliDetect ? "SLI" : "NOSLI"));
597 }
598 else if (glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_SST96) {
599 GrSst96Config_t *sc =
600 &glbHWConfig.SSTs[glbCurrentBoard].sstBoard.SST96Config;
601
602 sprintf(buf,
603 "Glide v0.30 Voodoo_Rush %d "
604 "CARD/%d FB/%d TM/%d TMU/NOSLI",
605 glbCurrentBoard,
606 sc->fbRam,
607 sc->tmuConfig.tmuRam,
608 sc->nTexelfx);
609 }
610 else {
611 strcpy(buf, "Glide v0.30 UNKNOWN");
612 }
613 return (GLubyte *) buf;
614 }
615 default:
616 return NULL;
617 }
618#endif
619}
620
621
622int fxDDInitFxMesaContext( fxMesaContext fxMesa )
623{
624
625 FX_setupGrVertexLayout();
626
627 if (getenv("FX_EMULATE_SINGLE_TMU"))
628 fxMesa->haveTwoTMUs = GL_FALSE;
629
630 fxMesa->emulateTwoTMUs = fxMesa->haveTwoTMUs;
631
632 if (!getenv("FX_DONT_FAKE_MULTITEX"))
633 fxMesa->emulateTwoTMUs = GL_TRUE;
634
635 if(getenv("FX_GLIDE_SWAPINTERVAL"))
636 fxMesa->swapInterval=atoi(getenv("FX_GLIDE_SWAPINTERVAL"));
637 else
638 fxMesa->swapInterval=1;
639
640 if(getenv("MESA_FX_SWAP_PENDING"))
641 fxMesa->maxPendingSwapBuffers=atoi(getenv("MESA_FX_SWAP_PENDING"));
642 else
643 fxMesa->maxPendingSwapBuffers=2;
644
645 if(getenv("MESA_FX_INFO"))
646 fxMesa->verbose=GL_TRUE;
647 else
648 fxMesa->verbose=GL_FALSE;
649
650 fxMesa->color=0xffffffff;
651 fxMesa->clearC=0;
652 fxMesa->clearA=0;
653
654 fxMesa->stats.swapBuffer=0;
655 fxMesa->stats.reqTexUpload=0;
656 fxMesa->stats.texUpload=0;
657 fxMesa->stats.memTexUpload=0;
658
659 fxMesa->tmuSrc=FX_TMU_NONE;
660 fxMesa->lastUnitsMode=FX_UM_NONE;
661 fxTMInit(fxMesa);
662
663 /* FX units setup */
664
665 fxMesa->unitsState.alphaTestEnabled=GL_FALSE;
666 fxMesa->unitsState.alphaTestFunc=GR_CMP_ALWAYS;
667 fxMesa->unitsState.alphaTestRefValue=0;
668
669 fxMesa->unitsState.blendEnabled=GL_FALSE;
670 fxMesa->unitsState.blendSrcFuncRGB=GR_BLEND_ONE;
671 fxMesa->unitsState.blendDstFuncRGB=GR_BLEND_ZERO;
672 fxMesa->unitsState.blendSrcFuncAlpha=GR_BLEND_ONE;
673 fxMesa->unitsState.blendDstFuncAlpha=GR_BLEND_ZERO;
674
675 fxMesa->unitsState.depthTestEnabled =GL_FALSE;
676 fxMesa->unitsState.depthMask =GL_TRUE;
677 fxMesa->unitsState.depthTestFunc =GR_CMP_LESS;
678
679 FX_grColorMask(FXTRUE, fxMesa->haveAlphaBuffer ? FXTRUE : FXFALSE);
680 if(fxMesa->haveDoubleBuffer) {
681 fxMesa->currentFB=GR_BUFFER_BACKBUFFER;
682 FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
683 } else {
684 fxMesa->currentFB=GR_BUFFER_FRONTBUFFER;
685 FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
686 }
687
688 fxMesa->state = NULL;
689 fxMesa->fogTable = NULL;
690
691 fxMesa->state = malloc(FX_grGetInteger(FX_GLIDE_STATE_SIZE));
692 fxMesa->fogTable = (GrFog_t*)malloc(FX_grGetInteger(FX_FOG_TABLE_ENTRIES)*sizeof(GrFog_t));
693
694 if (!fxMesa->state || !fxMesa->fogTable) {
695 if (fxMesa->state) free(fxMesa->state);
696 if (fxMesa->fogTable) free(fxMesa->fogTable);
697 return 0;
698 }
699
700 if(fxMesa->haveZBuffer)
701 FX_grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
702
703#if (!FXMESA_USE_ARGB)
704 FX_grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); /* Not every Glide has this */
705#endif
706
707 fxMesa->textureAlign=FX_grGetInteger(FX_TEXTURE_ALIGN);
708 fxMesa->glCtx->Const.MaxTextureLevels=9;
709 fxMesa->glCtx->Const.MaxTextureSize=256;
710 fxMesa->glCtx->Const.MaxTextureUnits=fxMesa->emulateTwoTMUs ? 2 : 1;
711 fxMesa->glCtx->NewState|=NEW_DRVSTATE1;
712 fxMesa->new_state = NEW_ALL;
713
714 fxDDSetupInit();
715 fxDDCvaInit();
716 fxDDClipInit();
717 fxDDTrifuncInit();
718 fxDDFastPathInit();
719
720 fxSetupDDPointers(fxMesa->glCtx);
721 fxDDRenderInit(fxMesa->glCtx);
722 fxDDInitExtensions(fxMesa->glCtx);
723
724 fxDDSetNearFar(fxMesa->glCtx,1.0,100.0);
725
726 FX_grGlideGetState((GrState*)fxMesa->state);
727
728 /* XXX Fix me: callback not registered when main VB is created.
729 */
730 if (fxMesa->glCtx->VB)
731 fxDDRegisterVB( fxMesa->glCtx->VB );
732
733 /* XXX Fix me too: need to have the 'struct dd' prepared prior to
734 * creating the context... The below is broken if you try to insert
735 * new stages.
736 */
737 if (fxMesa->glCtx->NrPipelineStages)
738 fxMesa->glCtx->NrPipelineStages = fxDDRegisterPipelineStages(
739 fxMesa->glCtx->PipelineStage,
740 fxMesa->glCtx->PipelineStage,
741 fxMesa->glCtx->NrPipelineStages);
742
743 /* Run the config file */
744 gl_context_initialize( fxMesa->glCtx );
745
746 return 1;
747}
748
749
750
751
752
753void fxDDInitExtensions( GLcontext *ctx )
754{
755 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
756
757 gl_extensions_disable(ctx, "GL_EXT_blend_logic_op");
758 gl_extensions_disable(ctx, "GL_EXT_blend_minmax");
759 gl_extensions_disable(ctx, "GL_EXT_blend_subtract");
760 gl_extensions_disable(ctx, "GL_EXT_blend_color");
761 gl_extensions_disable(ctx, "GL_EXT_paletted_texture");
762
763 gl_extensions_add(ctx, DEFAULT_ON, "3DFX_set_global_palette", 0);
764
765 if (!fxMesa->haveTwoTMUs)
766 gl_extensions_disable(ctx, "GL_EXT_texture_env_add");
767
768 if (!fxMesa->emulateTwoTMUs)
769 gl_extensions_disable(ctx, "GL_ARB_multitexture");
770
771
772 /* Example of hooking in an extension function.
773 * For DRI-based drivers, also see __driRegisterExtensions in the
774 * tdfx_xmesa.c file.
775 */
776#if 0
777 {
778 void **dispatchTable = (void **) ctx->Exec;
779 const int _gloffset_FooBarEXT = 555; /* just an example number! */
780 const int tabSize = _glapi_get_dispatch_table_size();
781 assert(_gloffset_FooBarEXT < tabSize);
782 dispatchTable[_gloffset_FooBarEXT] = (void *) fxFooBarEXT;
783 /* XXX You would also need to hook into the display list dispatch
784 * table. Really, the implementation of extensions might as well
785 * be in the core of Mesa since core Mesa and the device driver
786 * is one big shared lib.
787 */
788 }
789#endif
790}
791
792/*
793 This driver may need to move the drawing operations to a different sub
794 window. This modifies the viewport command to add our X,Y offset to all
795 drawn objects that go through the viewport transformation.
796*/
797
798/************************************************************************/
799/************************************************************************/
800/************************************************************************/
801
802/* Check if the hardware supports the current context
803 *
804 * Performs similar work to fxDDChooseRenderState() - should be merged.
805 */
806static GLboolean fxIsInHardware(GLcontext *ctx)
807{
808 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
809
810 if (!ctx->Hint.AllowDrawMem)
811 return GL_TRUE; /* you'll take it and like it */
812
813 if((ctx->RasterMask & STENCIL_BIT) ||
814 ((ctx->Color.BlendEnabled) && (ctx->Color.BlendEquation!=GL_FUNC_ADD_EXT)) ||
815 ((ctx->Color.ColorLogicOpEnabled) && (ctx->Color.LogicOp!=GL_COPY)) ||
816 (ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR) ||
817 (!((ctx->Color.ColorMask[RCOMP]==ctx->Color.ColorMask[GCOMP]) &&
818 (ctx->Color.ColorMask[GCOMP]==ctx->Color.ColorMask[BCOMP]) &&
819 (ctx->Color.ColorMask[ACOMP]==ctx->Color.ColorMask[ACOMP])))
820 )
821 {
822 return GL_FALSE;
823 }
824 /* Unsupported texture/multitexture cases */
825
826 if(fxMesa->emulateTwoTMUs) {
827 if((ctx->Enabled & (TEXTURE0_3D | TEXTURE1_3D)) ||
828 /* Not very well written ... */
829 ((ctx->Enabled & (TEXTURE0_1D | TEXTURE1_1D)) &&
830 ((ctx->Enabled & (TEXTURE0_2D | TEXTURE1_2D))!=(TEXTURE0_2D | TEXTURE1_2D)))
831 ) {
832 return GL_FALSE;
833 }
834
835 if((ctx->Texture.ReallyEnabled & TEXTURE0_2D) &&
836 (ctx->Texture.Unit[0].EnvMode==GL_BLEND)) {
837 return GL_FALSE;
838 }
839
840 if((ctx->Texture.ReallyEnabled & TEXTURE1_2D) &&
841 (ctx->Texture.Unit[1].EnvMode==GL_BLEND)) {
842 return GL_FALSE;
843 }
844
845
846 if (MESA_VERBOSE & (VERBOSE_DRIVER|VERBOSE_TEXTURE))
847 fprintf(stderr, "fxMesa: fxIsInHardware, envmode is %s/%s\n",
848 gl_lookup_enum_by_nr(ctx->Texture.Unit[0].EnvMode),
849 gl_lookup_enum_by_nr(ctx->Texture.Unit[1].EnvMode));
850
851 /* KW: This was wrong (I think) and I changed it... which doesn't mean
852 * it is now correct...
853 */
854 if((ctx->Enabled & (TEXTURE0_1D | TEXTURE0_2D | TEXTURE0_3D)) &&
855 (ctx->Enabled & (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D)))
856 {
857 /* Can't use multipass to blend a multitextured triangle - fall
858 * back to software.
859 */
860 if (!fxMesa->haveTwoTMUs && ctx->Color.BlendEnabled) {
861 return GL_FALSE;
862 }
863
864 if ((ctx->Texture.Unit[0].EnvMode!=ctx->Texture.Unit[1].EnvMode) &&
865 (ctx->Texture.Unit[0].EnvMode!=GL_MODULATE) &&
866 (ctx->Texture.Unit[0].EnvMode!=GL_REPLACE)) /* q2, seems ok... */
867 {
868 if (MESA_VERBOSE&VERBOSE_DRIVER)
869 fprintf(stderr, "fxMesa: unsupported multitex env mode\n");
870 return GL_FALSE;
871 }
872 }
873 } else {
874 if((ctx->Enabled & (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D)) ||
875 /* Not very well written ... */
876 ((ctx->Enabled & TEXTURE0_1D) &&
877 (!(ctx->Enabled & TEXTURE0_2D)))
878 ) {
879 return GL_FALSE;
880 }
881
882
883 if((ctx->Texture.ReallyEnabled & TEXTURE0_2D) &&
884 (ctx->Texture.Unit[0].EnvMode==GL_BLEND)) {
885 return GL_FALSE;
886 }
887 }
888
889 return GL_TRUE;
890}
891
892
893
894#define INTERESTED (~(NEW_MODELVIEW|NEW_PROJECTION|NEW_PROJECTION|NEW_TEXTURE_MATRIX|NEW_USER_CLIP|NEW_CLIENT_STATE|NEW_TEXTURE_ENABLE))
895
896static void fxDDUpdateDDPointers(GLcontext *ctx)
897{
898 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
899 GLuint new_state = ctx->NewState;
900
901 if (MESA_VERBOSE&(VERBOSE_DRIVER|VERBOSE_STATE))
902 fprintf(stderr,"fxmesa: fxDDUpdateDDPointers(...)\n");
903
904 if (new_state & (NEW_RASTER_OPS|NEW_TEXTURING))
905 fxMesa->is_in_hardware = fxIsInHardware(ctx);
906
907 if (fxMesa->is_in_hardware) {
908 if (fxMesa->new_state)
909 fxSetupFXUnits(ctx);
910
911 if(new_state & INTERESTED) {
912 fxDDChooseRenderState( ctx );
913 fxMesa->RenderVBTables=fxDDChooseRenderVBTables(ctx);
914 fxMesa->RenderVBClippedTab=fxMesa->RenderVBTables[0];
915 fxMesa->RenderVBCulledTab=fxMesa->RenderVBTables[1];
916 fxMesa->RenderVBRawTab=fxMesa->RenderVBTables[2];
917
918 ctx->Driver.RasterSetup=fxDDChooseSetupFunction(ctx);
919 }
920
921 ctx->Driver.PointsFunc=fxMesa->PointsFunc;
922 ctx->Driver.LineFunc=fxMesa->LineFunc;
923 ctx->Driver.TriangleFunc=fxMesa->TriangleFunc;
924 ctx->Driver.QuadFunc=fxMesa->QuadFunc;
925 } else {
926 fxMesa->render_index = FX_FALLBACK;
927 }
928}
929
930static void fxDDReducedPrimitiveChange(GLcontext *ctx, GLenum prim)
931{
932 if (ctx->Polygon.CullFlag) {
933 if (ctx->PB->primitive != GL_POLYGON) { /* Lines or Points */
934 FX_grCullMode(GR_CULL_DISABLE);
935 FX_CONTEXT(ctx)->cullMode=GR_CULL_DISABLE;
936 }
937 }
938}
939
940void fxSetupDDPointers(GLcontext *ctx)
941{
942 if (MESA_VERBOSE&VERBOSE_DRIVER) {
943 fprintf(stderr,"fxmesa: fxSetupDDPointers()\n");
944 }
945
946 ctx->Driver.UpdateState=fxDDUpdateDDPointers;
947
948 ctx->Driver.WriteDepthSpan=fxDDWriteDepthSpan;
949 ctx->Driver.WriteDepthPixels=fxDDWriteDepthPixels;
950 ctx->Driver.ReadDepthSpan=fxDDReadDepthSpan;
951 ctx->Driver.ReadDepthPixels=fxDDReadDepthPixels;
952
953 ctx->Driver.GetString=fxDDGetString;
954
955 ctx->Driver.Dither=fxDDDither;
956
957 ctx->Driver.NearFar=fxDDSetNearFar;
958
959 ctx->Driver.GetParameteri=fxDDGetParameteri;
960
961 ctx->Driver.ClearIndex=NULL;
962 ctx->Driver.ClearColor=fxDDClearColor;
963 ctx->Driver.Clear=fxDDClear;
964
965 ctx->Driver.Index=NULL;
966 ctx->Driver.Color=fxDDSetColor;
967
968 ctx->Driver.SetDrawBuffer=fxDDSetDrawBuffer;
969 ctx->Driver.SetReadBuffer=fxDDSetReadBuffer;
970 ctx->Driver.GetBufferSize=fxDDBufferSize;
971
972 ctx->Driver.Bitmap=fxDDDrawBitMap;
973 ctx->Driver.DrawPixels=NULL;
974
975 ctx->Driver.Finish=fxDDFinish;
976 ctx->Driver.Flush=NULL;
977
978 ctx->Driver.RenderStart=NULL;
979 ctx->Driver.RenderFinish=NULL;
980
981 ctx->Driver.TexEnv=fxDDTexEnv;
982 ctx->Driver.TexImage=fxDDTexImg;
983 ctx->Driver.TexSubImage=fxDDTexSubImg;
984 ctx->Driver.TexParameter=fxDDTexParam;
985 ctx->Driver.BindTexture=fxDDTexBind;
986 ctx->Driver.DeleteTexture=fxDDTexDel;
987 ctx->Driver.UpdateTexturePalette=fxDDTexPalette;
988
989 ctx->Driver.RectFunc=NULL;
990
991 ctx->Driver.AlphaFunc=fxDDAlphaFunc;
992 ctx->Driver.BlendFunc=fxDDBlendFunc;
993 ctx->Driver.DepthFunc=fxDDDepthFunc;
994 ctx->Driver.DepthMask=fxDDDepthMask;
995 ctx->Driver.ColorMask=fxDDColorMask;
996 ctx->Driver.Fogfv=fxDDFogfv;
997 ctx->Driver.Scissor=fxDDScissor;
998 ctx->Driver.FrontFace=fxDDFrontFace;
999 ctx->Driver.CullFace=fxDDCullFace;
1000 ctx->Driver.ShadeModel=fxDDShadeModel;
1001 ctx->Driver.Enable=fxDDEnable;
1002 ctx->Driver.ReducedPrimitiveChange=fxDDReducedPrimitiveChange;
1003
1004 ctx->Driver.RegisterVB=fxDDRegisterVB;
1005 ctx->Driver.UnregisterVB=fxDDUnregisterVB;
1006
1007 ctx->Driver.RegisterPipelineStages = fxDDRegisterPipelineStages;
1008
1009 ctx->Driver.OptimizeImmediatePipeline = 0; /* nothing done yet */
1010 ctx->Driver.OptimizePrecalcPipeline = 0;
1011
1012/* if (getenv("MESA_USE_FAST") || getenv("FX_USE_FAST")) */
1013/* ctx->Driver.OptimizePrecalcPipeline = fxDDOptimizePrecalcPipeline; */
1014
1015 if (!getenv("FX_NO_FAST"))
1016 ctx->Driver.BuildPrecalcPipeline = fxDDBuildPrecalcPipeline;
1017
1018 ctx->Driver.TriangleCaps = DD_TRI_CULL|DD_TRI_OFFSET|DD_TRI_LIGHT_TWOSIDE;
1019
1020 fxSetupDDSpanPointers(ctx);
1021
1022 FX_CONTEXT(ctx)->render_index = 1; /* force an update */
1023 fxDDUpdateDDPointers(ctx);
1024}
1025
1026
1027#else
1028
1029
1030/*
1031 * Need this to provide at least one external definition.
1032 */
1033
1034int gl_fx_dummy_function_dd(void)
1035{
1036 return 0;
1037}
1038
1039#endif /* FX */
1040
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