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
  40 #include "swrast/swrast.h"
  41 #include "swrast_setup/swrast_setup.h"
  42 #include "tnl/tnl.h"
  43 #include "array_cache/acache.h"
  44
  45 #include "tnl/t_pipeline.h"
  46
  47 #include "drivers/common/driverfuncs.h"
  48
  49 #include "via_screen.h"
  50 #include "via_dri.h"
  51
  52 #include "via_state.h"
  53 #include "via_tex.h"
  54 #include "via_span.h"
  55 #include "via_tris.h"
  56 #include "via_ioctl.h"
  57 #include "via_fb.h"
  58
  59 #include <stdio.h>
  60 #include "macros.h"
  61
  62 #define DRIVER_DATE     "20041215"
  63
  64 #include "vblank.h"
  65 #include "utils.h"
  66
  67 GLuint VIA_DEBUG = 0;
  68
  69 /**
  70  * Return various strings for \c glGetString.
  71  *
  72  * \sa glGetString
  73  */
  74 static const GLubyte *viaGetString(GLcontext *ctx, GLenum name)
  75 {
  76    static char buffer[128];
  77    unsigned   offset;
  78
  79
  80    switch (name) {
  81    case GL_VENDOR:
  82       return (GLubyte *)"VIA Technology";
  83
  84    case GL_RENDERER: {
  85       static const char * const chipset_names[] = {
  86          "UniChrome",
  87          "CastleRock (CLE266)",
  88          "UniChrome (KM400)",
  89          "UniChrome (K8M800)",
  90          "UniChrome (PM8x0/CN400)",
  91       };
  92       struct via_context *vmesa = VIA_CONTEXT(ctx);
  93       unsigned id = vmesa->viaScreen->deviceID;
  94
  95       offset = driGetRendererString( buffer,
  96                                      chipset_names[(id > VIA_PM800) ? 0 : id],
  97                                      DRIVER_DATE, 0 );
  98       return (GLubyte *)buffer;
  99    }
 100
 101    default:
 102       return NULL;
 103    }
 104 }
 105
 106
 107 /**
 108  * Calculate a width that satisfies the hardware's alignment requirements.
 109  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 110  * 16 pixels.
 111  *
 112  * \param width  Minimum buffer width, in pixels.
 113  *
 114  * \returns A pixel width that meets the alignment requirements.
 115  */
 116 static __inline__ unsigned
 117 buffer_align( unsigned width )
 118 {
 119     return (width + 0x0f) & ~0x0f;
 120 }
 121
 122
 123 /**
 124  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 125  * and stencil) associated with the specified context.
 126  *
 127  * \warning
 128  * This function also calls \c AllocateBuffer to actually allocate the
 129  * buffers.
 130  *
 131  * \sa AllocateBuffer
 132  */
 133 static GLboolean
 134 calculate_buffer_parameters( struct via_context *vmesa )
 135 {
 136    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 137    const unsigned extra = 32;
 138    unsigned w;
 139    unsigned h;
 140
 141    /* Allocate front-buffer */
 142    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 143       w = vmesa->driDrawable->w;
 144       h = vmesa->driDrawable->h;
 145
 146       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 147       vmesa->front.pitch = buffer_align( w ) << shift;
 148       vmesa->front.size = vmesa->front.pitch * h;
 149
 150       if (vmesa->front.map)
 151          via_free_draw_buffer(vmesa, &vmesa->front);
 152       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 153          return GL_FALSE;
 154
 155    } else {
 156       w = vmesa->viaScreen->width;
 157       h = vmesa->viaScreen->height;
 158
 159       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 160       vmesa->front.pitch = buffer_align( w ) << shift;
 161       vmesa->front.size = vmesa->front.pitch * h;
 162       if (getenv("ALTERNATE_SCREEN"))
 163         vmesa->front.offset = vmesa->front.size;
 164       else
 165         vmesa->front.offset = 0;
 166       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 167    }
 168
 169
 170    /* Allocate back-buffer */
 171    if (vmesa->hasBack) {
 172       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 173       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift);
 174       vmesa->back.pitch += extra;
 175       vmesa->back.pitch = MIN2(vmesa->back.pitch, vmesa->front.pitch);
 176       vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 177       if (vmesa->back.map)
 178          via_free_draw_buffer(vmesa, &vmesa->back);
 179       if (!via_alloc_draw_buffer(vmesa, &vmesa->back))
 180          return GL_FALSE;
 181    }
 182    else {
 183       if (vmesa->back.map)
 184          via_free_draw_buffer(vmesa, &vmesa->back);
 185       (void) memset( &vmesa->back, 0, sizeof( vmesa->back ) );
 186    }
 187
 188
 189    /* Allocate depth-buffer */
 190    if ( vmesa->hasStencil || vmesa->hasDepth ) {
 191       vmesa->depth.bpp = vmesa->depthBits;
 192       if (vmesa->depth.bpp == 24)
 193          vmesa->depth.bpp = 32;
 194
 195       vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) *
 196                             (vmesa->depth.bpp/8)) + extra;
 197       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 198
 199       if (vmesa->depth.map)
 200          via_free_draw_buffer(vmesa, &vmesa->depth);
 201       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 202          return GL_FALSE;
 203       }
 204    }
 205    else {
 206       if (vmesa->depth.map)
 207          via_free_draw_buffer(vmesa, &vmesa->depth);
 208       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 209    }
 210
 211    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 212        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 213       vmesa->doPageFlip = vmesa->allowPageFlip;
 214       assert(vmesa->back.pitch == vmesa->front.pitch);
 215    }
 216    else
 217       vmesa->doPageFlip = GL_FALSE;
 218
 219    return GL_TRUE;
 220 }
 221
 222
 223 void viaReAllocateBuffers(GLframebuffer *drawbuffer)
 224 {
 225     GET_CURRENT_CONTEXT(ctx);
 226     struct via_context *vmesa = VIA_CONTEXT(ctx);
 227
 228     _swrast_alloc_buffers( drawbuffer );
 229     calculate_buffer_parameters( vmesa );
 230 }
 231
 232 static void viaBufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
 233 {
 234     GET_CURRENT_CONTEXT(ctx);
 235     struct via_context *vmesa = VIA_CONTEXT(ctx);
 236     *width = vmesa->driDrawable->w;
 237     *height = vmesa->driDrawable->h;
 238 }
 239
 240 /* Extension strings exported by the Unichrome driver.
 241  */
 242 static const char * const card_extensions[] =
 243 {
 244    "GL_ARB_multitexture",
 245    "GL_ARB_point_parameters",
 246    "GL_ARB_texture_env_add",
 247    "GL_ARB_texture_env_combine",
 248 /*    "GL_ARB_texture_env_dot3", */
 249    "GL_ARB_texture_mirrored_repeat",
 250    "GL_EXT_stencil_wrap",
 251    "GL_EXT_texture_env_combine",
 252 /*    "GL_EXT_texture_env_dot3", */
 253    "GL_EXT_texture_lod_bias",
 254    "GL_EXT_secondary_color",
 255    "GL_EXT_fog_coord",
 256    "GL_NV_blend_square",
 257    NULL
 258 };
 259
 260 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 261 extern const struct tnl_pipeline_stage _via_render_stage;
 262
 263 static const struct tnl_pipeline_stage *via_pipeline[] = {
 264     &_tnl_vertex_transform_stage,
 265     &_tnl_normal_transform_stage,
 266     &_tnl_lighting_stage,
 267     &_tnl_fog_coordinate_stage,
 268     &_tnl_texgen_stage,
 269     &_tnl_texture_transform_stage,
 270     /* REMOVE: point attenuation stage */
 271 #if 1
 272     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 273 #endif
 274     &_tnl_render_stage,
 275     0,
 276 };
 277
 278
 279 static const struct dri_debug_control debug_control[] =
 280 {
 281     { "fall",  DEBUG_FALLBACKS },
 282     { "tex",   DEBUG_TEXTURE },
 283     { "ioctl", DEBUG_IOCTL },
 284     { "prim",  DEBUG_PRIMS },
 285     { "vert",  DEBUG_VERTS },
 286     { "state", DEBUG_STATE },
 287     { "verb",  DEBUG_VERBOSE },
 288     { "dri",   DEBUG_DRI },
 289     { "dma",   DEBUG_DMA },
 290     { "san",   DEBUG_SANITY },
 291     { "sync",  DEBUG_SYNC },
 292     { "sleep", DEBUG_SLEEP },
 293     { "pix",   DEBUG_PIXEL },
 294     { "2d",    DEBUG_2D },
 295     { NULL,    0 }
 296 };
 297
 298
 299 static GLboolean
 300 AllocateDmaBuffer(const GLvisual *visual, struct via_context *vmesa)
 301 {
 302     if (vmesa->dma)
 303         via_free_dma_buffer(vmesa);
 304
 305     if (!via_alloc_dma_buffer(vmesa))
 306         return GL_FALSE;
 307
 308     vmesa->dmaLow = 0;
 309     vmesa->dmaCliprectAddr = ~0;
 310     return GL_TRUE;
 311 }
 312
 313 static void
 314 FreeBuffer(struct via_context *vmesa)
 315 {
 316     if (vmesa->front.map && vmesa->drawType == GLX_PBUFFER_BIT)
 317         via_free_draw_buffer(vmesa, &vmesa->front);
 318
 319     if (vmesa->back.map)
 320         via_free_draw_buffer(vmesa, &vmesa->back);
 321
 322     if (vmesa->depth.map)
 323         via_free_draw_buffer(vmesa, &vmesa->depth);
 324
 325     if (vmesa->breadcrumb.map)
 326         via_free_draw_buffer(vmesa, &vmesa->breadcrumb);
 327
 328     if (vmesa->dma)
 329         via_free_dma_buffer(vmesa);
 330 }
 331
 332 static int
 333 get_ust_nop( int64_t * ust )
 334 {
 335    *ust = 1;
 336    return 0;
 337 }
 338
 339 GLboolean
 340 viaCreateContext(const __GLcontextModes *mesaVis,
 341                  __DRIcontextPrivate *driContextPriv,
 342                  void *sharedContextPrivate)
 343 {
 344     GLcontext *ctx, *shareCtx;
 345     struct via_context *vmesa;
 346     __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 347     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 348     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 349         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 350     struct dd_function_table functions;
 351
 352     /* Allocate via context */
 353     vmesa = (struct via_context *) CALLOC_STRUCT(via_context);
 354     if (!vmesa) {
 355         return GL_FALSE;
 356     }
 357
 358     /* Parse configuration files.
 359      */
 360     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 361                          sPriv->myNum, "via");
 362
 363     /* pick back buffer */
 364     vmesa->hasBack = mesaVis->doubleBufferMode;
 365
 366     switch(mesaVis->depthBits) {
 367     case 0:
 368        vmesa->hasDepth = GL_FALSE;
 369        vmesa->depthBits = 0;
 370        vmesa->depth_max = 1.0;
 371        break;
 372     case 16:
 373        vmesa->hasDepth = GL_TRUE;
 374        vmesa->depthBits = mesaVis->depthBits;
 375        vmesa->have_hw_stencil = GL_FALSE;
 376        vmesa->depth_max = (GLfloat)0xffff;
 377        vmesa->depth_clear_mask = 0xf << 28;
 378        vmesa->ClearDepth = 0xffff;
 379        vmesa->polygon_offset_scale = 1.0 / vmesa->depth_max;
 380        break;
 381     case 24:
 382        vmesa->hasDepth = GL_TRUE;
 383        vmesa->depthBits = mesaVis->depthBits;
 384        vmesa->depth_max = (GLfloat) 0xffffff;
 385        vmesa->depth_clear_mask = 0xe << 28;
 386        vmesa->ClearDepth = 0xffffff00;
 387
 388        assert(mesaVis->haveStencilBuffer);
 389        assert(mesaVis->stencilBits == 8);
 390
 391        vmesa->have_hw_stencil = GL_TRUE;
 392        vmesa->stencilBits = mesaVis->stencilBits;
 393        vmesa->stencil_clear_mask = 0x1 << 28;
 394        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 395        break;
 396     case 32:
 397        vmesa->hasDepth = GL_TRUE;
 398        vmesa->depthBits = mesaVis->depthBits;
 399        assert(!mesaVis->haveStencilBuffer);
 400        vmesa->have_hw_stencil = GL_FALSE;
 401        vmesa->depth_max = (GLfloat)0xffffffff;
 402        vmesa->depth_clear_mask = 0xf << 28;
 403        vmesa->ClearDepth = 0xffffffff;
 404        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 405        break;
 406     default:
 407        assert(0);
 408        break;
 409     }
 410
 411     make_empty_list(&vmesa->freed_tex_buffers);
 412     make_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]);
 413     make_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]);
 414     make_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]);
 415
 416     _mesa_init_driver_functions(&functions);
 417     viaInitTextureFuncs(&functions);
 418
 419     /* Allocate the Mesa context */
 420     if (sharedContextPrivate)
 421         shareCtx = ((struct via_context *) sharedContextPrivate)->glCtx;
 422     else
 423         shareCtx = NULL;
 424
 425     vmesa->glCtx = _mesa_create_context(mesaVis, shareCtx, &functions,
 426                                         (void*) vmesa);
 427
 428     vmesa->shareCtx = shareCtx;
 429
 430     if (!vmesa->glCtx) {
 431         FREE(vmesa);
 432         return GL_FALSE;
 433     }
 434     driContextPriv->driverPrivate = vmesa;
 435
 436     ctx = vmesa->glCtx;
 437
 438     ctx->Const.MaxTextureLevels = 10;
 439     ctx->Const.MaxTextureUnits = 2;
 440     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 441     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 442
 443     ctx->Const.MinLineWidth = 1.0;
 444     ctx->Const.MinLineWidthAA = 1.0;
 445     ctx->Const.MaxLineWidth = 1.0;
 446     ctx->Const.MaxLineWidthAA = 1.0;
 447     ctx->Const.LineWidthGranularity = 1.0;
 448
 449     ctx->Const.MinPointSize = 1.0;
 450     ctx->Const.MinPointSizeAA = 1.0;
 451     ctx->Const.MaxPointSize = 1.0;
 452     ctx->Const.MaxPointSizeAA = 1.0;
 453     ctx->Const.PointSizeGranularity = 1.0;
 454
 455     ctx->Driver.GetBufferSize = viaBufferSize;
 456 /*    ctx->Driver.ResizeBuffers = _swrast_alloc_buffers;  *//* FIXME ?? */
 457     ctx->Driver.GetString = viaGetString;
 458
 459     ctx->DriverCtx = (void *)vmesa;
 460     vmesa->glCtx = ctx;
 461
 462     /* Initialize the software rasterizer and helper modules.
 463      */
 464     _swrast_CreateContext(ctx);
 465     _ac_CreateContext(ctx);
 466     _tnl_CreateContext(ctx);
 467     _swsetup_CreateContext(ctx);
 468
 469     /* Install the customized pipeline:
 470      */
 471     _tnl_destroy_pipeline(ctx);
 472     _tnl_install_pipeline(ctx, via_pipeline);
 473
 474     /* Configure swrast and T&L to match hardware characteristics:
 475      */
 476     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 477     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 478     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 479     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 480
 481 /*     vmesa->display = dpy; */
 482     vmesa->display = sPriv->display;
 483
 484     vmesa->hHWContext = driContextPriv->hHWContext;
 485     vmesa->driFd = sPriv->fd;
 486     vmesa->driHwLock = &sPriv->pSAREA->lock;
 487
 488     vmesa->viaScreen = viaScreen;
 489     vmesa->driScreen = sPriv;
 490     vmesa->sarea = saPriv;
 491
 492     vmesa->renderIndex = ~0;
 493     vmesa->setupIndex = ~0;
 494     vmesa->hwPrimitive = GL_POLYGON+1;
 495
 496     /* KW: Hardwire this.  Was previously set bogusly in
 497      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 498      */
 499     vmesa->drawType = GLX_WINDOW_BIT;
 500
 501
 502     _math_matrix_ctr(&vmesa->ViewportMatrix);
 503
 504     /* Do this early, before VIA_FLUSH_DMA can be called:
 505      */
 506     if (!AllocateDmaBuffer(mesaVis, vmesa)) {
 507         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 508         FreeBuffer(vmesa);
 509         FREE(vmesa);
 510         return GL_FALSE;
 511     }
 512
 513     /* Allocate a small piece of fb memory for synchronization:
 514      */
 515     vmesa->breadcrumb.bpp = 32;
 516     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 517     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 518
 519     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 520         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 521         FreeBuffer(vmesa);
 522         FREE(vmesa);
 523         return GL_FALSE;
 524     }
 525
 526     driInitExtensions( ctx, card_extensions, GL_TRUE );
 527     viaInitStateFuncs(ctx);
 528     viaInitTriFuncs(ctx);
 529     viaInitSpanFuncs(ctx);
 530     viaInitIoctlFuncs(ctx);
 531     viaInitState(ctx);
 532
 533     if (getenv("VIA_DEBUG"))
 534        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 535                                         debug_control );
 536
 537     if (getenv("VIA_NO_RAST"))
 538        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 539
 540     /* I don't understand why this isn't working:
 541      */
 542     vmesa->vblank_flags =
 543        vmesa->viaScreen->irqEnabled ?
 544         driGetDefaultVBlankFlags(&vmesa->optionCache) : VBLANK_FLAG_NO_IRQ;
 545
 546     /* Hack this up in its place:
 547      */
 548     vmesa->vblank_flags = (getenv("VIA_VSYNC") ?
 549                            VBLANK_FLAG_SYNC : VBLANK_FLAG_NO_IRQ);
 550
 551     if (getenv("VIA_PAGEFLIP"))
 552        vmesa->allowPageFlip = 1;
 553
 554     vmesa->get_ust =
 555        (PFNGLXGETUSTPROC) glXGetProcAddress( (const GLubyte *) "__glXGetUST" );
 556     if ( vmesa->get_ust == NULL ) {
 557        vmesa->get_ust = get_ust_nop;
 558     }
 559     vmesa->get_ust( &vmesa->swap_ust );
 560
 561
 562     vmesa->regMMIOBase = (GLuint *)((GLuint)viaScreen->reg);
 563     vmesa->pnGEMode = (GLuint *)((GLuint)viaScreen->reg + 0x4);
 564     vmesa->regEngineStatus = (GLuint *)((GLuint)viaScreen->reg + 0x400);
 565     vmesa->regTranSet = (GLuint *)((GLuint)viaScreen->reg + 0x43C);
 566     vmesa->regTranSpace = (GLuint *)((GLuint)viaScreen->reg + 0x440);
 567     vmesa->agpBase = viaScreen->agpBase;
 568
 569     return GL_TRUE;
 570 }
 571
 572 void
 573 viaDestroyContext(__DRIcontextPrivate *driContextPriv)
 574 {
 575     GET_CURRENT_CONTEXT(ctx);
 576     struct via_context *vmesa =
 577        (struct via_context *)driContextPriv->driverPrivate;
 578     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 579     assert(vmesa); /* should never be null */
 580
 581     /* check if we're deleting the currently bound context */
 582     if (vmesa == current) {
 583       VIA_FLUSH_DMA(vmesa);
 584       _mesa_make_current2(NULL, NULL, NULL);
 585     }
 586
 587     if (vmesa) {
 588         viaWaitIdle(vmesa);
 589         if (vmesa->doPageFlip) {
 590            LOCK_HARDWARE(vmesa);
 591            if (vmesa->pfCurrentOffset != 0) {
 592               fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 593               viaResetPageFlippingLocked(vmesa);
 594            }
 595            UNLOCK_HARDWARE(vmesa);
 596         }
 597
 598         _swsetup_DestroyContext(vmesa->glCtx);
 599         _tnl_DestroyContext(vmesa->glCtx);
 600         _ac_DestroyContext(vmesa->glCtx);
 601         _swrast_DestroyContext(vmesa->glCtx);
 602         /* free the Mesa context */
 603         _mesa_destroy_context(vmesa->glCtx);
 604         /* release our data */
 605         FreeBuffer(vmesa);
 606
 607         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 608         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 609         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 610         assert (is_empty_list(&vmesa->freed_tex_buffers));
 611
 612         FREE(vmesa);
 613     }
 614 }
 615
 616
 617 void viaXMesaWindowMoved(struct via_context *vmesa)
 618 {
 619    __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 620    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 621
 622    if (!dPriv)
 623       return;
 624
 625    switch (vmesa->glCtx->Color._DrawDestMask[0]) {
 626    case DD_FRONT_LEFT_BIT:
 627       if (dPriv->numBackClipRects == 0) {
 628          vmesa->numClipRects = dPriv->numClipRects;
 629          vmesa->pClipRects = dPriv->pClipRects;
 630       }
 631       else {
 632          vmesa->numClipRects = dPriv->numBackClipRects;
 633          vmesa->pClipRects = dPriv->pBackClipRects;
 634       }
 635       break;
 636    case DD_BACK_LEFT_BIT:
 637       vmesa->numClipRects = dPriv->numClipRects;
 638       vmesa->pClipRects = dPriv->pClipRects;
 639       break;
 640    default:
 641       vmesa->numClipRects = 0;
 642       break;
 643    }
 644
 645    if (vmesa->drawW != dPriv->w ||
 646        vmesa->drawH != dPriv->h)
 647       calculate_buffer_parameters( vmesa );
 648
 649    vmesa->drawXoff = (GLuint)(((dPriv->x * bytePerPixel) & 0x1f) /
 650                               bytePerPixel);
 651    vmesa->drawX = dPriv->x - vmesa->drawXoff;
 652    vmesa->drawY = dPriv->y;
 653    vmesa->drawW = dPriv->w;
 654    vmesa->drawH = dPriv->h;
 655
 656    vmesa->front.orig = (vmesa->front.offset +
 657                         vmesa->drawY * vmesa->front.pitch +
 658                         vmesa->drawX * bytePerPixel);
 659
 660    vmesa->front.origMap = (vmesa->front.map +
 661                            vmesa->drawY * vmesa->front.pitch +
 662                            vmesa->drawX * bytePerPixel);
 663
 664    vmesa->back.orig = vmesa->back.offset;
 665    vmesa->depth.orig = vmesa->depth.offset;
 666    vmesa->back.origMap = vmesa->back.map;
 667    vmesa->depth.origMap = vmesa->depth.map;
 668
 669    viaCalcViewport(vmesa->glCtx);
 670 }
 671
 672 GLboolean
 673 viaUnbindContext(__DRIcontextPrivate *driContextPriv)
 674 {
 675     return GL_TRUE;
 676 }
 677
 678 GLboolean
 679 viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 680                __DRIdrawablePrivate *driDrawPriv,
 681                __DRIdrawablePrivate *driReadPriv)
 682 {
 683     if (VIA_DEBUG & DEBUG_DRI) {
 684         fprintf(stderr, "driContextPriv = %08x\n", (GLuint)driContextPriv);
 685         fprintf(stderr, "driDrawPriv = %08x\n", (GLuint)driDrawPriv);
 686         fprintf(stderr, "driReadPriv = %08x\n", (GLuint)driReadPriv);
 687     }
 688
 689     if (driContextPriv) {
 690         struct via_context *vmesa =
 691            (struct via_context *)driContextPriv->driverPrivate;
 692         GLcontext *ctx = vmesa->glCtx;
 693
 694         if ( vmesa->driDrawable != driDrawPriv ) {
 695            driDrawableInitVBlank( driDrawPriv, vmesa->vblank_flags );
 696            vmesa->driDrawable = driDrawPriv;
 697            if ( ! calculate_buffer_parameters( vmesa ) ) {
 698               return GL_FALSE;
 699            }
 700            ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 701         }
 702
 703         _mesa_make_current2(vmesa->glCtx,
 704                             (GLframebuffer *)driDrawPriv->driverPrivate,
 705                             (GLframebuffer *)driReadPriv->driverPrivate);
 706
 707         viaXMesaWindowMoved(vmesa);
 708         ctx->Driver.Scissor(vmesa->glCtx,
 709                             vmesa->glCtx->Scissor.X,
 710                             vmesa->glCtx->Scissor.Y,
 711                             vmesa->glCtx->Scissor.Width,
 712                             vmesa->glCtx->Scissor.Height);
 713     }
 714     else {
 715         _mesa_make_current(0,0);
 716     }
 717
 718     return GL_TRUE;
 719 }
 720
 721 void viaGetLock(struct via_context *vmesa, GLuint flags)
 722 {
 723     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 724     __DRIscreenPrivate *sPriv = vmesa->driScreen;
 725
 726     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 727
 728     DRI_VALIDATE_DRAWABLE_INFO( sPriv, dPriv );
 729
 730     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 731        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 732        vmesa->newEmitState = ~0;
 733     }
 734
 735     if (vmesa->lastStamp != dPriv->lastStamp) {
 736        viaXMesaWindowMoved(vmesa);
 737        vmesa->lastStamp = dPriv->lastStamp;
 738     }
 739
 740     if (vmesa->doPageFlip &&
 741         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 742        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 743        viaResetPageFlippingLocked(vmesa);
 744     }
 745 }
 746
 747
 748 void
 749 viaSwapBuffers(__DRIdrawablePrivate *drawablePrivate)
 750 {
 751     __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *)drawablePrivate;
 752
 753     if (dPriv &&
 754         dPriv->driContextPriv &&
 755         dPriv->driContextPriv->driverPrivate) {
 756         struct via_context *vmesa =
 757            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 758         GLcontext *ctx = vmesa->glCtx;
 759
 760         if (ctx->Visual.doubleBufferMode) {
 761             _mesa_notifySwapBuffers(ctx);
 762             if (vmesa->doPageFlip) {
 763                 viaPageFlip(dPriv);
 764             }
 765             else {
 766                 viaCopyBuffer(dPriv);
 767             }
 768         }
 769         else
 770             VIA_FLUSH_DMA(vmesa);
 771     }
 772     else {
 773         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 774     }
 775 }