src/mesa/drivers/dri/unichrome/via_context.c

   1 /*
   2  * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file via_context.c
  27  *
  28  * \author John Sheng (presumably of either VIA Technologies or S3 Graphics)
  29  * \author Others at VIA Technologies?
  30  * \author Others at S3 Graphics?
  31  */
  32
  33 #include "glheader.h"
  34 #include "context.h"
  35 #include "matrix.h"
  36 #include "state.h"
  37 #include "simple_list.h"
  38 #include "extensions.h"
  39 #include "framebuffer.h"
  40
  41 #include "swrast/swrast.h"
  42 #include "swrast_setup/swrast_setup.h"
  43 #include "tnl/tnl.h"
  44 #include "array_cache/acache.h"
  45
  46 #include "tnl/t_pipeline.h"
  47
  48 #include "drivers/common/driverfuncs.h"
  49
  50 #include "via_screen.h"
  51 #include "via_dri.h"
  52
  53 #include "via_state.h"
  54 #include "via_tex.h"
  55 #include "via_span.h"
  56 #include "via_tris.h"
  57 #include "via_ioctl.h"
  58 #include "via_fb.h"
  59
  60 #include <stdio.h>
  61 #include "macros.h"
  62
  63 #define DRIVER_DATE     "20050526"
  64
  65 #include "vblank.h"
  66 #include "utils.h"
  67
  68 GLuint VIA_DEBUG = 0;
  69
  70 /**
  71  * Return various strings for \c glGetString.
  72  *
  73  * \sa glGetString
  74  */
  75 static const GLubyte *viaGetString(GLcontext *ctx, GLenum name)
  76 {
  77    static char buffer[128];
  78    unsigned   offset;
  79
  80
  81    switch (name) {
  82    case GL_VENDOR:
  83       return (GLubyte *)"VIA Technology";
  84
  85    case GL_RENDERER: {
  86       static const char * const chipset_names[] = {
  87          "UniChrome",
  88          "CastleRock (CLE266)",
  89          "UniChrome (KM400)",
  90          "UniChrome (K8M800)",
  91          "UniChrome (PM8x0/CN400)",
  92       };
  93       struct via_context *vmesa = VIA_CONTEXT(ctx);
  94       unsigned id = vmesa->viaScreen->deviceID;
  95
  96       offset = driGetRendererString( buffer,
  97                                      chipset_names[(id > VIA_PM800) ? 0 : id],
  98                                      DRIVER_DATE, 0 );
  99       return (GLubyte *)buffer;
 100    }
 101
 102    default:
 103       return NULL;
 104    }
 105 }
 106
 107
 108 /**
 109  * Calculate a width that satisfies the hardware's alignment requirements.
 110  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 111  * 16 pixels.
 112  *
 113  * \param width  Minimum buffer width, in pixels.
 114  *
 115  * \returns A pixel width that meets the alignment requirements.
 116  */
 117 static __inline__ unsigned
 118 buffer_align( unsigned width )
 119 {
 120     return (width + 0x0f) & ~0x0f;
 121 }
 122
 123
 124 /**
 125  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 126  * and stencil) associated with the specified context.
 127  *
 128  * \warning
 129  * This function also calls \c AllocateBuffer to actually allocate the
 130  * buffers.
 131  *
 132  * \sa AllocateBuffer
 133  */
 134 static GLboolean
 135 calculate_buffer_parameters( struct via_context *vmesa )
 136 {
 137    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 138    const unsigned extra = 32;
 139    unsigned w;
 140    unsigned h;
 141
 142    /* Allocate front-buffer */
 143    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 144       w = vmesa->driDrawable->w;
 145       h = vmesa->driDrawable->h;
 146
 147       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 148       vmesa->front.pitch = buffer_align( w ) << shift;
 149       vmesa->front.size = vmesa->front.pitch * h;
 150
 151       if (vmesa->front.map)
 152          via_free_draw_buffer(vmesa, &vmesa->front);
 153       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 154          return GL_FALSE;
 155
 156    } else {
 157       w = vmesa->viaScreen->width;
 158       h = vmesa->viaScreen->height;
 159
 160       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 161       vmesa->front.pitch = buffer_align( w ) << shift;
 162       vmesa->front.size = vmesa->front.pitch * h;
 163       if (getenv("ALTERNATE_SCREEN"))
 164         vmesa->front.offset = vmesa->front.size;
 165       else
 166         vmesa->front.offset = 0;
 167       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 168    }
 169
 170
 171    /* Allocate back-buffer */
 172    if (vmesa->hasBack) {
 173       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 174       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift);
 175       vmesa->back.pitch += extra;
 176       vmesa->back.pitch = MIN2(vmesa->back.pitch, vmesa->front.pitch);
 177       vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 178       if (vmesa->back.map)
 179          via_free_draw_buffer(vmesa, &vmesa->back);
 180       if (!via_alloc_draw_buffer(vmesa, &vmesa->back))
 181          return GL_FALSE;
 182    }
 183    else {
 184       if (vmesa->back.map)
 185          via_free_draw_buffer(vmesa, &vmesa->back);
 186       (void) memset( &vmesa->back, 0, sizeof( vmesa->back ) );
 187    }
 188
 189
 190    /* Allocate depth-buffer */
 191    if ( vmesa->hasStencil || vmesa->hasDepth ) {
 192       vmesa->depth.bpp = vmesa->depthBits;
 193       if (vmesa->depth.bpp == 24)
 194          vmesa->depth.bpp = 32;
 195
 196       vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) *
 197                             (vmesa->depth.bpp/8)) + extra;
 198       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 199
 200       if (vmesa->depth.map)
 201          via_free_draw_buffer(vmesa, &vmesa->depth);
 202       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 203          return GL_FALSE;
 204       }
 205    }
 206    else {
 207       if (vmesa->depth.map)
 208          via_free_draw_buffer(vmesa, &vmesa->depth);
 209       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 210    }
 211
 212    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 213        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 214       vmesa->doPageFlip = vmesa->allowPageFlip;
 215       assert(vmesa->back.pitch == vmesa->front.pitch);
 216    }
 217    else
 218       vmesa->doPageFlip = GL_FALSE;
 219
 220    return GL_TRUE;
 221 }
 222
 223
 224 void viaReAllocateBuffers(GLcontext *ctx, GLframebuffer *drawbuffer,
 225                           GLuint width, GLuint height)
 226 {
 227     struct via_context *vmesa = VIA_CONTEXT(ctx);
 228
 229 #if 0
 230     _swrast_alloc_buffers( drawbuffer );
 231 #else
 232     _mesa_resize_framebuffer(ctx, drawbuffer, width, height);
 233 #endif
 234
 235     calculate_buffer_parameters( vmesa );
 236 }
 237
 238 static void viaBufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
 239 {
 240     GET_CURRENT_CONTEXT(ctx);
 241     struct via_context *vmesa = VIA_CONTEXT(ctx);
 242     *width = vmesa->driDrawable->w;
 243     *height = vmesa->driDrawable->h;
 244 }
 245
 246 /* Extension strings exported by the Unichrome driver.
 247  */
 248 static const char * const card_extensions[] =
 249 {
 250    "GL_ARB_multitexture",
 251    "GL_ARB_point_parameters",
 252    "GL_ARB_texture_env_add",
 253    "GL_ARB_texture_env_combine",
 254 /*    "GL_ARB_texture_env_dot3", */
 255    "GL_ARB_texture_mirrored_repeat",
 256    "GL_EXT_stencil_wrap",
 257    "GL_EXT_texture_env_combine",
 258 /*    "GL_EXT_texture_env_dot3", */
 259    "GL_EXT_texture_lod_bias",
 260    "GL_EXT_secondary_color",
 261    "GL_EXT_fog_coord",
 262    "GL_NV_blend_square",
 263    NULL
 264 };
 265
 266 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 267 extern const struct tnl_pipeline_stage _via_render_stage;
 268
 269 static const struct tnl_pipeline_stage *via_pipeline[] = {
 270     &_tnl_vertex_transform_stage,
 271     &_tnl_normal_transform_stage,
 272     &_tnl_lighting_stage,
 273     &_tnl_fog_coordinate_stage,
 274     &_tnl_texgen_stage,
 275     &_tnl_texture_transform_stage,
 276     /* REMOVE: point attenuation stage */
 277 #if 1
 278     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 279 #endif
 280     &_tnl_render_stage,
 281     0,
 282 };
 283
 284
 285 static const struct dri_debug_control debug_control[] =
 286 {
 287     { "fall",  DEBUG_FALLBACKS },
 288     { "tex",   DEBUG_TEXTURE },
 289     { "ioctl", DEBUG_IOCTL },
 290     { "prim",  DEBUG_PRIMS },
 291     { "vert",  DEBUG_VERTS },
 292     { "state", DEBUG_STATE },
 293     { "verb",  DEBUG_VERBOSE },
 294     { "dri",   DEBUG_DRI },
 295     { "dma",   DEBUG_DMA },
 296     { "san",   DEBUG_SANITY },
 297     { "sync",  DEBUG_SYNC },
 298     { "sleep", DEBUG_SLEEP },
 299     { "pix",   DEBUG_PIXEL },
 300     { "2d",    DEBUG_2D },
 301     { NULL,    0 }
 302 };
 303
 304
 305 static GLboolean
 306 AllocateDmaBuffer(struct via_context *vmesa)
 307 {
 308     if (vmesa->dma)
 309         via_free_dma_buffer(vmesa);
 310
 311     if (!via_alloc_dma_buffer(vmesa))
 312         return GL_FALSE;
 313
 314     vmesa->dmaLow = 0;
 315     vmesa->dmaCliprectAddr = ~0;
 316     return GL_TRUE;
 317 }
 318
 319 static void
 320 FreeBuffer(struct via_context *vmesa)
 321 {
 322     if (vmesa->front.map && vmesa->drawType == GLX_PBUFFER_BIT)
 323         via_free_draw_buffer(vmesa, &vmesa->front);
 324
 325     if (vmesa->back.map)
 326         via_free_draw_buffer(vmesa, &vmesa->back);
 327
 328     if (vmesa->depth.map)
 329         via_free_draw_buffer(vmesa, &vmesa->depth);
 330
 331     if (vmesa->breadcrumb.map)
 332         via_free_draw_buffer(vmesa, &vmesa->breadcrumb);
 333
 334     if (vmesa->dma)
 335         via_free_dma_buffer(vmesa);
 336 }
 337
 338 static int
 339 get_ust_nop( int64_t * ust )
 340 {
 341    *ust = 1;
 342    return 0;
 343 }
 344
 345 GLboolean
 346 viaCreateContext(const __GLcontextModes *visual,
 347                  __DRIcontextPrivate *driContextPriv,
 348                  void *sharedContextPrivate)
 349 {
 350     GLcontext *ctx, *shareCtx;
 351     struct via_context *vmesa;
 352     __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 353     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 354     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 355         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 356     struct dd_function_table functions;
 357
 358     /* Allocate via context */
 359     vmesa = (struct via_context *) CALLOC_STRUCT(via_context);
 360     if (!vmesa) {
 361         return GL_FALSE;
 362     }
 363
 364     /* Parse configuration files.
 365      */
 366     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 367                          sPriv->myNum, "via");
 368
 369     /* pick back buffer */
 370     vmesa->hasBack = visual->doubleBufferMode;
 371
 372     switch(visual->depthBits) {
 373     case 0:
 374        vmesa->hasDepth = GL_FALSE;
 375        vmesa->depthBits = 0;
 376        vmesa->depth_max = 1.0;
 377        break;
 378     case 16:
 379        vmesa->hasDepth = GL_TRUE;
 380        vmesa->depthBits = visual->depthBits;
 381        vmesa->have_hw_stencil = GL_FALSE;
 382        vmesa->depth_max = (GLfloat)0xffff;
 383        vmesa->depth_clear_mask = 0xf << 28;
 384        vmesa->ClearDepth = 0xffff;
 385        vmesa->polygon_offset_scale = 1.0 / vmesa->depth_max;
 386        break;
 387     case 24:
 388        vmesa->hasDepth = GL_TRUE;
 389        vmesa->depthBits = visual->depthBits;
 390        vmesa->depth_max = (GLfloat) 0xffffff;
 391        vmesa->depth_clear_mask = 0xe << 28;
 392        vmesa->ClearDepth = 0xffffff00;
 393
 394        assert(visual->haveStencilBuffer);
 395        assert(visual->stencilBits == 8);
 396
 397        vmesa->have_hw_stencil = GL_TRUE;
 398        vmesa->stencilBits = visual->stencilBits;
 399        vmesa->stencil_clear_mask = 0x1 << 28;
 400        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 401        break;
 402     case 32:
 403        vmesa->hasDepth = GL_TRUE;
 404        vmesa->depthBits = visual->depthBits;
 405        assert(!visual->haveStencilBuffer);
 406        vmesa->have_hw_stencil = GL_FALSE;
 407        vmesa->depth_max = (GLfloat)0xffffffff;
 408        vmesa->depth_clear_mask = 0xf << 28;
 409        vmesa->ClearDepth = 0xffffffff;
 410        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 411        break;
 412     default:
 413        assert(0);
 414        break;
 415     }
 416
 417     make_empty_list(&vmesa->freed_tex_buffers);
 418     make_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]);
 419     make_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]);
 420     make_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]);
 421
 422     _mesa_init_driver_functions(&functions);
 423     viaInitTextureFuncs(&functions);
 424
 425     /* Allocate the Mesa context */
 426     if (sharedContextPrivate)
 427         shareCtx = ((struct via_context *) sharedContextPrivate)->glCtx;
 428     else
 429         shareCtx = NULL;
 430
 431     vmesa->glCtx = _mesa_create_context(visual, shareCtx, &functions,
 432                                         (void*) vmesa);
 433
 434     vmesa->shareCtx = shareCtx;
 435
 436     if (!vmesa->glCtx) {
 437         FREE(vmesa);
 438         return GL_FALSE;
 439     }
 440     driContextPriv->driverPrivate = vmesa;
 441
 442     ctx = vmesa->glCtx;
 443
 444     ctx->Const.MaxTextureLevels = 10;
 445     ctx->Const.MaxTextureUnits = 2;
 446     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 447     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 448
 449     ctx->Const.MinLineWidth = 1.0;
 450     ctx->Const.MinLineWidthAA = 1.0;
 451     ctx->Const.MaxLineWidth = 1.0;
 452     ctx->Const.MaxLineWidthAA = 1.0;
 453     ctx->Const.LineWidthGranularity = 1.0;
 454
 455     ctx->Const.MinPointSize = 1.0;
 456     ctx->Const.MinPointSizeAA = 1.0;
 457     ctx->Const.MaxPointSize = 1.0;
 458     ctx->Const.MaxPointSizeAA = 1.0;
 459     ctx->Const.PointSizeGranularity = 1.0;
 460
 461     ctx->Driver.GetBufferSize = viaBufferSize;
 462 /*    ctx->Driver.ResizeBuffers = _swrast_alloc_buffers;  *//* FIXME ?? */
 463     ctx->Driver.GetString = viaGetString;
 464
 465     ctx->DriverCtx = (void *)vmesa;
 466     vmesa->glCtx = ctx;
 467
 468     /* Initialize the software rasterizer and helper modules.
 469      */
 470     _swrast_CreateContext(ctx);
 471     _ac_CreateContext(ctx);
 472     _tnl_CreateContext(ctx);
 473     _swsetup_CreateContext(ctx);
 474
 475     /* Install the customized pipeline:
 476      */
 477     _tnl_destroy_pipeline(ctx);
 478     _tnl_install_pipeline(ctx, via_pipeline);
 479
 480     /* Configure swrast and T&L to match hardware characteristics:
 481      */
 482     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 483     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 484     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 485     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 486
 487 /*     vmesa->display = dpy; */
 488     vmesa->display = sPriv->display;
 489
 490     vmesa->hHWContext = driContextPriv->hHWContext;
 491     vmesa->driFd = sPriv->fd;
 492     vmesa->driHwLock = &sPriv->pSAREA->lock;
 493
 494     vmesa->viaScreen = viaScreen;
 495     vmesa->driScreen = sPriv;
 496     vmesa->sarea = saPriv;
 497
 498     vmesa->renderIndex = ~0;
 499     vmesa->setupIndex = ~0;
 500     vmesa->hwPrimitive = GL_POLYGON+1;
 501
 502     /* KW: Hardwire this.  Was previously set bogusly in
 503      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 504      */
 505     vmesa->drawType = GLX_WINDOW_BIT;
 506
 507
 508     _math_matrix_ctr(&vmesa->ViewportMatrix);
 509
 510     /* Do this early, before VIA_FLUSH_DMA can be called:
 511      */
 512     if (!AllocateDmaBuffer(vmesa)) {
 513         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 514         FreeBuffer(vmesa);
 515         FREE(vmesa);
 516         return GL_FALSE;
 517     }
 518
 519     /* Allocate a small piece of fb memory for synchronization:
 520      */
 521     vmesa->breadcrumb.bpp = 32;
 522     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 523     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 524
 525     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 526         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 527         FreeBuffer(vmesa);
 528         FREE(vmesa);
 529         return GL_FALSE;
 530     }
 531
 532     driInitExtensions( ctx, card_extensions, GL_TRUE );
 533     viaInitStateFuncs(ctx);
 534     viaInitTriFuncs(ctx);
 535     viaInitSpanFuncs(ctx);
 536     viaInitIoctlFuncs(ctx);
 537     viaInitState(ctx);
 538
 539     if (getenv("VIA_DEBUG"))
 540        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 541                                         debug_control );
 542
 543     if (getenv("VIA_NO_RAST"))
 544        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 545
 546     /* I don't understand why this isn't working:
 547      */
 548     vmesa->vblank_flags =
 549        vmesa->viaScreen->irqEnabled ?
 550         driGetDefaultVBlankFlags(&vmesa->optionCache) : VBLANK_FLAG_NO_IRQ;
 551
 552     /* Hack this up in its place:
 553      */
 554     vmesa->vblank_flags = (getenv("VIA_VSYNC") ?
 555                            VBLANK_FLAG_SYNC : VBLANK_FLAG_NO_IRQ);
 556
 557     if (getenv("VIA_PAGEFLIP"))
 558        vmesa->allowPageFlip = 1;
 559
 560     vmesa->get_ust =
 561        (PFNGLXGETUSTPROC) glXGetProcAddress( (const GLubyte *) "__glXGetUST" );
 562     if ( vmesa->get_ust == NULL ) {
 563        vmesa->get_ust = get_ust_nop;
 564     }
 565     vmesa->get_ust( &vmesa->swap_ust );
 566
 567
 568     vmesa->regMMIOBase = (GLuint *)((GLuint)viaScreen->reg);
 569     vmesa->pnGEMode = (GLuint *)((GLuint)viaScreen->reg + 0x4);
 570     vmesa->regEngineStatus = (GLuint *)((GLuint)viaScreen->reg + 0x400);
 571     vmesa->regTranSet = (GLuint *)((GLuint)viaScreen->reg + 0x43C);
 572     vmesa->regTranSpace = (GLuint *)((GLuint)viaScreen->reg + 0x440);
 573     vmesa->agpBase = viaScreen->agpBase;
 574
 575     return GL_TRUE;
 576 }
 577
 578 void
 579 viaDestroyContext(__DRIcontextPrivate *driContextPriv)
 580 {
 581     GET_CURRENT_CONTEXT(ctx);
 582     struct via_context *vmesa =
 583        (struct via_context *)driContextPriv->driverPrivate;
 584     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 585     assert(vmesa); /* should never be null */
 586
 587     /* check if we're deleting the currently bound context */
 588     if (vmesa == current) {
 589       VIA_FLUSH_DMA(vmesa);
 590       _mesa_make_current(NULL, NULL, NULL);
 591     }
 592
 593     if (vmesa) {
 594         viaWaitIdle(vmesa);
 595         if (vmesa->doPageFlip) {
 596            LOCK_HARDWARE(vmesa);
 597            if (vmesa->pfCurrentOffset != 0) {
 598               fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 599               viaResetPageFlippingLocked(vmesa);
 600            }
 601            UNLOCK_HARDWARE(vmesa);
 602         }
 603
 604         _swsetup_DestroyContext(vmesa->glCtx);
 605         _tnl_DestroyContext(vmesa->glCtx);
 606         _ac_DestroyContext(vmesa->glCtx);
 607         _swrast_DestroyContext(vmesa->glCtx);
 608         /* free the Mesa context */
 609         _mesa_destroy_context(vmesa->glCtx);
 610         /* release our data */
 611         FreeBuffer(vmesa);
 612
 613         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 614         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 615         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 616         assert (is_empty_list(&vmesa->freed_tex_buffers));
 617
 618         FREE(vmesa);
 619     }
 620 }
 621
 622
 623 void viaXMesaWindowMoved(struct via_context *vmesa)
 624 {
 625    __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 626    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 627
 628    if (!dPriv)
 629       return;
 630
 631    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferMask[0]) {
 632    case BUFFER_BIT_BACK_LEFT:
 633       if (dPriv->numBackClipRects == 0) {
 634          vmesa->numClipRects = dPriv->numClipRects;
 635          vmesa->pClipRects = dPriv->pClipRects;
 636       }
 637       else {
 638          vmesa->numClipRects = dPriv->numBackClipRects;
 639          vmesa->pClipRects = dPriv->pBackClipRects;
 640       }
 641       break;
 642    case BUFFER_BIT_FRONT_LEFT:
 643       vmesa->numClipRects = dPriv->numClipRects;
 644       vmesa->pClipRects = dPriv->pClipRects;
 645       break;
 646    default:
 647       vmesa->numClipRects = 0;
 648       break;
 649    }
 650
 651    if (vmesa->drawW != dPriv->w ||
 652        vmesa->drawH != dPriv->h)
 653       calculate_buffer_parameters( vmesa );
 654
 655    vmesa->drawXoff = (GLuint)(((dPriv->x * bytePerPixel) & 0x1f) /
 656                               bytePerPixel);
 657    vmesa->drawX = dPriv->x - vmesa->drawXoff;
 658    vmesa->drawY = dPriv->y;
 659    vmesa->drawW = dPriv->w;
 660    vmesa->drawH = dPriv->h;
 661
 662    vmesa->front.orig = (vmesa->front.offset +
 663                         vmesa->drawY * vmesa->front.pitch +
 664                         vmesa->drawX * bytePerPixel);
 665
 666    vmesa->front.origMap = (vmesa->front.map +
 667                            vmesa->drawY * vmesa->front.pitch +
 668                            vmesa->drawX * bytePerPixel);
 669
 670    vmesa->back.orig = vmesa->back.offset;
 671    vmesa->depth.orig = vmesa->depth.offset;
 672    vmesa->back.origMap = vmesa->back.map;
 673    vmesa->depth.origMap = vmesa->depth.map;
 674
 675    viaCalcViewport(vmesa->glCtx);
 676 }
 677
 678 GLboolean
 679 viaUnbindContext(__DRIcontextPrivate *driContextPriv)
 680 {
 681     return GL_TRUE;
 682 }
 683
 684 GLboolean
 685 viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 686                __DRIdrawablePrivate *driDrawPriv,
 687                __DRIdrawablePrivate *driReadPriv)
 688 {
 689     if (VIA_DEBUG & DEBUG_DRI) {
 690         fprintf(stderr, "driContextPriv = %08x\n", (GLuint)driContextPriv);
 691         fprintf(stderr, "driDrawPriv = %08x\n", (GLuint)driDrawPriv);
 692         fprintf(stderr, "driReadPriv = %08x\n", (GLuint)driReadPriv);
 693     }
 694
 695     if (driContextPriv) {
 696         struct via_context *vmesa =
 697            (struct via_context *)driContextPriv->driverPrivate;
 698         GLcontext *ctx = vmesa->glCtx;
 699
 700         if ( vmesa->driDrawable != driDrawPriv ) {
 701            driDrawableInitVBlank( driDrawPriv, vmesa->vblank_flags );
 702            vmesa->driDrawable = driDrawPriv;
 703            if ( ! calculate_buffer_parameters( vmesa ) ) {
 704               return GL_FALSE;
 705            }
 706         }
 707
 708         _mesa_make_current(vmesa->glCtx,
 709                            (GLframebuffer *)driDrawPriv->driverPrivate,
 710                            (GLframebuffer *)driReadPriv->driverPrivate);
 711
 712
 713         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 714
 715         viaXMesaWindowMoved(vmesa);
 716         ctx->Driver.Scissor(vmesa->glCtx,
 717                             vmesa->glCtx->Scissor.X,
 718                             vmesa->glCtx->Scissor.Y,
 719                             vmesa->glCtx->Scissor.Width,
 720                             vmesa->glCtx->Scissor.Height);
 721     }
 722     else {
 723         _mesa_make_current(NULL, NULL, NULL);
 724     }
 725
 726     return GL_TRUE;
 727 }
 728
 729 void viaGetLock(struct via_context *vmesa, GLuint flags)
 730 {
 731     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 732     __DRIscreenPrivate *sPriv = vmesa->driScreen;
 733
 734     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 735
 736     DRI_VALIDATE_DRAWABLE_INFO( sPriv, dPriv );
 737
 738     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 739        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 740        vmesa->newEmitState = ~0;
 741     }
 742
 743     if (vmesa->lastStamp != dPriv->lastStamp) {
 744        viaXMesaWindowMoved(vmesa);
 745        vmesa->newEmitState = ~0;
 746        vmesa->lastStamp = dPriv->lastStamp;
 747     }
 748
 749     if (vmesa->doPageFlip &&
 750         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 751        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 752        viaResetPageFlippingLocked(vmesa);
 753     }
 754 }
 755
 756
 757 void
 758 viaSwapBuffers(__DRIdrawablePrivate *drawablePrivate)
 759 {
 760     __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *)drawablePrivate;
 761
 762     if (dPriv &&
 763         dPriv->driContextPriv &&
 764         dPriv->driContextPriv->driverPrivate) {
 765         struct via_context *vmesa =
 766            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 767         GLcontext *ctx = vmesa->glCtx;
 768
 769         _mesa_notifySwapBuffers(ctx);
 770
 771         if (ctx->Visual.doubleBufferMode) {
 772             if (vmesa->doPageFlip) {
 773                 viaPageFlip(dPriv);
 774             }
 775             else {
 776                 viaCopyBuffer(dPriv);
 777             }
 778         }
 779         else
 780             VIA_FLUSH_DMA(vmesa);
 781     }
 782     else {
 783         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 784     }
 785 }