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 "simple_list.h"
  37 #include "extensions.h"
  38
  39 #include "swrast/swrast.h"
  40 #include "swrast_setup/swrast_setup.h"
  41 #include "tnl/tnl.h"
  42 #include "array_cache/acache.h"
  43
  44 #include "tnl/t_pipeline.h"
  45
  46 #include "drivers/common/driverfuncs.h"
  47
  48 #include "via_screen.h"
  49 #include "via_dri.h"
  50
  51 #include "via_state.h"
  52 #include "via_tex.h"
  53 #include "via_span.h"
  54 #include "via_tris.h"
  55 #include "via_vb.h"
  56 #include "via_ioctl.h"
  57 #include "via_fb.h"
  58 #include "via_regs.h"
  59
  60 #include <stdio.h>
  61 #include "macros.h"
  62
  63 #define DRIVER_DATE     "20041215"
  64
  65 #include "vblank.h"
  66 #include "utils.h"
  67
  68 #ifdef DEBUG
  69 GLuint VIA_DEBUG = 0;
  70 #endif
  71
  72
  73 /**
  74  * Return various strings for \c glGetString.
  75  *
  76  * \sa glGetString
  77  */
  78 static const GLubyte *viaGetString(GLcontext *ctx, GLenum name)
  79 {
  80    static char buffer[128];
  81    unsigned   offset;
  82
  83
  84    switch (name) {
  85    case GL_VENDOR:
  86       return (GLubyte *)"VIA Technology";
  87
  88    case GL_RENDERER: {
  89       static const char * const chipset_names[] = {
  90          "UniChrome",
  91          "CastleRock (CLE266)",
  92          "UniChrome (KM400)",
  93          "UniChrome (K8M800)",
  94          "UniChrome (PM8x0/CN400)",
  95       };
  96       const viaContext * const via = VIA_CONTEXT(ctx);
  97       const unsigned id = via->viaScreen->deviceID;
  98
  99       offset = driGetRendererString( buffer,
 100                                      chipset_names[(id > VIA_PM800) ? 0 : id],
 101                                      DRIVER_DATE, 0 );
 102       return (GLubyte *)buffer;
 103    }
 104
 105    default:
 106       return NULL;
 107    }
 108 }
 109
 110
 111 /**
 112  * Calculate a width that satisfies the hardware's alignment requirements.
 113  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 114  * 16 pixels.
 115  *
 116  * \param width  Minimum buffer width, in pixels.
 117  *
 118  * \returns A pixel width that meets the alignment requirements.
 119  */
 120 static __inline__ unsigned
 121 buffer_align( unsigned width )
 122 {
 123     return (width + 0x0f) & ~0x0f;
 124 }
 125
 126
 127 /**
 128  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 129  * and stencil) associated with the specified context.
 130  *
 131  * \warning
 132  * This function also calls \c AllocateBuffer to actually allocate the
 133  * buffers.
 134  *
 135  * \sa AllocateBuffer
 136  */
 137 static GLboolean
 138 calculate_buffer_parameters( viaContextPtr vmesa )
 139 {
 140    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 141    const unsigned extra = 32;
 142    unsigned w;
 143    unsigned h;
 144
 145    /* Allocate front-buffer */
 146    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 147       w = vmesa->driDrawable->w;
 148       h = vmesa->driDrawable->h;
 149
 150       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 151       vmesa->front.pitch = buffer_align( w ) << shift;
 152       vmesa->front.size = vmesa->front.pitch * h;
 153
 154       if (vmesa->front.map)
 155          via_free_draw_buffer(vmesa, &vmesa->front);
 156       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 157          return GL_FALSE;
 158
 159    }
 160    else {
 161       w = vmesa->viaScreen->width;
 162       h = vmesa->viaScreen->height;
 163
 164       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 165       vmesa->front.pitch = buffer_align( w ) << shift;
 166       vmesa->front.size = vmesa->front.pitch * h;
 167       vmesa->front.offset = 0;
 168       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 169    }
 170
 171
 172    /* Allocate back-buffer */
 173    if (vmesa->hasBack) {
 174       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 175       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift) + extra;
 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       /* KW: mem leak if vmesa->hasBack ever changes:
 184        */
 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 ) * (vmesa->depth.bpp/8)) + extra;
 196       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 197
 198       if (vmesa->depth.map)
 199          via_free_draw_buffer(vmesa, &vmesa->depth);
 200       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 201          return GL_FALSE;
 202       }
 203    }
 204    else {
 205       /* KW: mem leak if vmesa->hasStencil/hasDepth ever changes:
 206        */
 207       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 208    }
 209
 210    /*=* John Sheng [2003.5.31] flip *=*/
 211    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 212        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 213 #define ALLOW_EXPERIMENTAL_PAGEFLIP 0
 214 #if ALLOW_EXPERIMENTAL_PAGEFLIP
 215       vmesa->doPageFlip = GL_TRUE;
 216 #else
 217       vmesa->doPageFlip = GL_FALSE;
 218 #endif
 219       /* vmesa->currentPage = 0; */
 220       assert(vmesa->back.pitch == vmesa->front.pitch);
 221    }
 222    else
 223       vmesa->doPageFlip = GL_FALSE;
 224
 225    return GL_TRUE;
 226 }
 227
 228
 229 void viaReAllocateBuffers(GLframebuffer *drawbuffer)
 230 {
 231     GET_CURRENT_CONTEXT(ctx);
 232     viaContextPtr vmesa = VIA_CONTEXT(ctx);
 233
 234     _swrast_alloc_buffers( drawbuffer );
 235     calculate_buffer_parameters( vmesa );
 236 }
 237
 238 static void viaBufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
 239 {
 240     GET_CURRENT_CONTEXT(ctx);
 241     viaContextPtr 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_NV_blend_square",
 261    NULL
 262 };
 263
 264 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 265 extern const struct tnl_pipeline_stage _via_render_stage;
 266
 267 static const struct tnl_pipeline_stage *via_pipeline[] = {
 268     &_tnl_vertex_transform_stage,
 269     &_tnl_normal_transform_stage,
 270     &_tnl_lighting_stage,
 271     &_tnl_fog_coordinate_stage,
 272     &_tnl_texgen_stage,
 273     &_tnl_texture_transform_stage,
 274     /* REMOVE: point attenuation stage */
 275     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 276     &_tnl_render_stage,
 277     0,
 278 };
 279
 280
 281 static GLboolean
 282 AllocateDmaBuffer(const GLvisual *visual, viaContextPtr vmesa)
 283 {
 284     if (vmesa->dma)
 285         via_free_dma_buffer(vmesa);
 286
 287     if (!via_alloc_dma_buffer(vmesa))
 288         return GL_FALSE;
 289
 290     vmesa->dmaLow = 0;
 291     vmesa->dmaCliprectAddr = 0;
 292     return GL_TRUE;
 293 }
 294
 295 static void
 296 FreeBuffer(viaContextPtr vmesa)
 297 {
 298     if (vmesa->front.map)
 299         via_free_draw_buffer(vmesa, &vmesa->front);
 300
 301     if (vmesa->back.map)
 302         via_free_draw_buffer(vmesa, &vmesa->back);
 303
 304     if (vmesa->depth.map)
 305         via_free_draw_buffer(vmesa, &vmesa->depth);
 306
 307     if (vmesa->dma)
 308         via_free_dma_buffer(vmesa);
 309 }
 310
 311 static int
 312 get_ust_nop( int64_t * ust )
 313 {
 314    *ust = 1;
 315    return 0;
 316 }
 317
 318 GLboolean
 319 viaCreateContext(const __GLcontextModes *mesaVis,
 320                  __DRIcontextPrivate *driContextPriv,
 321                  void *sharedContextPrivate)
 322 {
 323     GLcontext *ctx, *shareCtx;
 324     viaContextPtr vmesa;
 325     __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 326     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 327     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 328         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 329     struct dd_function_table functions;
 330
 331     /* Allocate via context */
 332     vmesa = (viaContextPtr) CALLOC_STRUCT(via_context_t);
 333     if (!vmesa) {
 334         return GL_FALSE;
 335     }
 336     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 337
 338     /* Parse configuration files.
 339      */
 340     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 341                          sPriv->myNum, "via");
 342
 343     /* pick back buffer */
 344     vmesa->hasBack = mesaVis->doubleBufferMode;
 345
 346     switch(mesaVis->depthBits) {
 347     case 0:
 348        vmesa->hasDepth = GL_FALSE;
 349        vmesa->depthBits = 0;
 350        vmesa->depth_max = 1.0;
 351        break;
 352     case 16:
 353        vmesa->hasDepth = GL_TRUE;
 354        vmesa->depthBits = mesaVis->depthBits;
 355        vmesa->have_hw_stencil = GL_FALSE;
 356        vmesa->depth_max = (GLfloat)0xffff;
 357        vmesa->depth_clear_mask = 0xf << 28;
 358        vmesa->ClearDepth = 0xffff;
 359        break;
 360     case 24:
 361        vmesa->hasDepth = GL_TRUE;
 362        vmesa->depthBits = mesaVis->depthBits;
 363        vmesa->depth_max = (GLfloat) 0xffffff;
 364        vmesa->depth_clear_mask = 0xe << 28;
 365        vmesa->ClearDepth = 0xffffff00;
 366
 367        assert(mesaVis->haveStencilBuffer);
 368        assert(mesaVis->stencilBits == 8);
 369
 370        vmesa->have_hw_stencil = GL_TRUE;
 371        vmesa->stencilBits = mesaVis->stencilBits;
 372        vmesa->stencil_clear_mask = 0x1 << 28;
 373        break;
 374     case 32:
 375        vmesa->hasDepth = GL_TRUE;
 376        vmesa->depthBits = mesaVis->depthBits;
 377        assert(!mesaVis->haveStencilBuffer);
 378        vmesa->have_hw_stencil = GL_FALSE;
 379        vmesa->depth_max = (GLfloat)0xffffffff;
 380        vmesa->depth_clear_mask = 0;
 381        vmesa->ClearDepth = 0xffffffff;
 382        vmesa->depth_clear_mask = 0xf << 28;
 383        break;
 384     default:
 385        assert(0);
 386        break;
 387     }
 388
 389
 390     _mesa_init_driver_functions(&functions);
 391     viaInitTextureFuncs(&functions);
 392
 393     /* Allocate the Mesa context */
 394     if (sharedContextPrivate)
 395         shareCtx = ((viaContextPtr) sharedContextPrivate)->glCtx;
 396     else
 397         shareCtx = NULL;
 398
 399     vmesa->glCtx = _mesa_create_context(mesaVis, shareCtx, &functions, (void*) vmesa);
 400
 401     vmesa->shareCtx = shareCtx;
 402
 403     if (!vmesa->glCtx) {
 404         FREE(vmesa);
 405         return GL_FALSE;
 406     }
 407     driContextPriv->driverPrivate = vmesa;
 408
 409     ctx = vmesa->glCtx;
 410
 411     ctx->Const.MaxTextureLevels = 10;
 412     ctx->Const.MaxTextureUnits = 2;
 413     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 414     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 415
 416     ctx->Const.MinLineWidth = 1.0;
 417     ctx->Const.MinLineWidthAA = 1.0;
 418     ctx->Const.MaxLineWidth = 1.0;
 419     ctx->Const.MaxLineWidthAA = 1.0;
 420     ctx->Const.LineWidthGranularity = 1.0;
 421
 422     ctx->Const.MinPointSize = 1.0;
 423     ctx->Const.MinPointSizeAA = 1.0;
 424     ctx->Const.MaxPointSize = 1.0;
 425     ctx->Const.MaxPointSizeAA = 1.0;
 426     ctx->Const.PointSizeGranularity = 1.0;
 427
 428     ctx->Driver.GetBufferSize = viaBufferSize;
 429 /*    ctx->Driver.ResizeBuffers = _swrast_alloc_buffers;  *//* FIXME ?? */
 430     ctx->Driver.GetString = viaGetString;
 431
 432     ctx->DriverCtx = (void *)vmesa;
 433     vmesa->glCtx = ctx;
 434
 435     /* Initialize the software rasterizer and helper modules.
 436      */
 437     _swrast_CreateContext(ctx);
 438     _ac_CreateContext(ctx);
 439     _tnl_CreateContext(ctx);
 440     _swsetup_CreateContext(ctx);
 441
 442     /* Install the customized pipeline:
 443      */
 444     _tnl_destroy_pipeline(ctx);
 445     _tnl_install_pipeline(ctx, via_pipeline);
 446
 447     /* Configure swrast and T&L to match hardware characteristics:
 448      */
 449     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 450     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 451     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 452     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 453
 454 /*     vmesa->display = dpy; */
 455     vmesa->display = sPriv->display;
 456
 457     vmesa->hHWContext = driContextPriv->hHWContext;
 458     vmesa->driFd = sPriv->fd;
 459     vmesa->driHwLock = &sPriv->pSAREA->lock;
 460
 461     vmesa->viaScreen = viaScreen;
 462     vmesa->driScreen = sPriv;
 463     vmesa->sarea = saPriv;
 464     vmesa->glBuffer = NULL;
 465
 466     vmesa->texHeap = mmInit(0, viaScreen->textureSize);
 467     vmesa->renderIndex = ~0;
 468
 469     make_empty_list(&vmesa->TexObjList);
 470     make_empty_list(&vmesa->SwappedOut);
 471
 472     vmesa->CurrentTexObj[0] = 0;
 473     vmesa->CurrentTexObj[1] = 0;
 474
 475     _math_matrix_ctr(&vmesa->ViewportMatrix);
 476
 477     /* Do this early, before VIA_FLUSH_DMA can be called:
 478      */
 479     if (!AllocateDmaBuffer(mesaVis, vmesa)) {
 480         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 481         FreeBuffer(vmesa);
 482         FREE(vmesa);
 483         return GL_FALSE;
 484     }
 485
 486     driInitExtensions( ctx, card_extensions, GL_TRUE );
 487     viaInitStateFuncs(ctx);
 488     viaInitTextures(ctx);
 489     viaInitTriFuncs(ctx);
 490     viaInitSpanFuncs(ctx);
 491     viaInitIoctlFuncs(ctx);
 492     viaInitVB(ctx);
 493     viaInitState(ctx);
 494
 495 #ifdef DEBUG
 496     if (getenv("VIA_DEBUG"))
 497         VIA_DEBUG = 1;
 498     else
 499         VIA_DEBUG = 0;
 500 #endif
 501
 502     if (getenv("VIA_NO_RAST"))
 503        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 504
 505
 506
 507     /* I don't understand why this isn't working:
 508      */
 509     vmesa->vblank_flags =
 510        vmesa->viaScreen->irqEnabled ?
 511         driGetDefaultVBlankFlags(&vmesa->optionCache) : VBLANK_FLAG_NO_IRQ;
 512
 513     /* Hack this up in its place:
 514      */
 515     vmesa->vblank_flags = getenv("VIA_VSYNC") ? VBLANK_FLAG_SYNC : VBLANK_FLAG_NO_IRQ;
 516
 517
 518     vmesa->get_ust = (PFNGLXGETUSTPROC) glXGetProcAddress( (const GLubyte *) "__glXGetUST" );
 519     if ( vmesa->get_ust == NULL ) {
 520        vmesa->get_ust = get_ust_nop;
 521     }
 522     vmesa->get_ust( &vmesa->swap_ust );
 523
 524
 525     vmesa->regMMIOBase = (GLuint *)((GLuint)viaScreen->reg);
 526     vmesa->pnGEMode = (GLuint *)((GLuint)viaScreen->reg + 0x4);
 527     vmesa->regEngineStatus = (GLuint *)((GLuint)viaScreen->reg + 0x400);
 528     vmesa->regTranSet = (GLuint *)((GLuint)viaScreen->reg + 0x43C);
 529     vmesa->regTranSpace = (GLuint *)((GLuint)viaScreen->reg + 0x440);
 530     vmesa->agpBase = viaScreen->agpBase;
 531     if (VIA_DEBUG) {
 532         fprintf(stderr, "regEngineStatus = %x\n", *vmesa->regEngineStatus);
 533     }
 534
 535     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 536     return GL_TRUE;
 537 }
 538
 539 void
 540 viaDestroyContext(__DRIcontextPrivate *driContextPriv)
 541 {
 542     viaContextPtr vmesa = (viaContextPtr)driContextPriv->driverPrivate;
 543     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 544     assert(vmesa); /* should never be null */
 545
 546     if (vmesa) {
 547         /*=* John Sheng [2003.5.31]  agp tex *=*/
 548         WAIT_IDLE(vmesa);
 549         if(VIA_DEBUG) fprintf(stderr, "agpFullCount = %d\n", vmesa->agpFullCount);
 550
 551         _swsetup_DestroyContext(vmesa->glCtx);
 552         _tnl_DestroyContext(vmesa->glCtx);
 553         _ac_DestroyContext(vmesa->glCtx);
 554         _swrast_DestroyContext(vmesa->glCtx);
 555         viaFreeVB(vmesa->glCtx);
 556         FreeBuffer(vmesa);
 557         /* free the Mesa context */
 558         _mesa_destroy_context(vmesa->glCtx);
 559         vmesa->glCtx->DriverCtx = NULL;
 560         FREE(vmesa);
 561     }
 562
 563     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 564 }
 565
 566
 567 void viaXMesaWindowMoved(viaContextPtr vmesa)
 568 {
 569    __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 570    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 571
 572    if (!dPriv)
 573       return;
 574
 575    switch (vmesa->glCtx->Color._DrawDestMask[0]) {
 576    case DD_FRONT_LEFT_BIT:
 577       if (dPriv->numBackClipRects == 0) {
 578          vmesa->numClipRects = dPriv->numClipRects;
 579          vmesa->pClipRects = dPriv->pClipRects;
 580       }
 581       else {
 582          vmesa->numClipRects = dPriv->numBackClipRects;
 583          vmesa->pClipRects = dPriv->pBackClipRects;
 584       }
 585       break;
 586    case DD_BACK_LEFT_BIT:
 587       vmesa->numClipRects = dPriv->numClipRects;
 588       vmesa->pClipRects = dPriv->pClipRects;
 589       break;
 590    default:
 591       vmesa->numClipRects = 0;
 592       break;
 593    }
 594
 595    if (vmesa->drawW != dPriv->w ||
 596        vmesa->drawH != dPriv->h)
 597       calculate_buffer_parameters( vmesa );
 598
 599    vmesa->drawXoff = (GLuint)(((dPriv->x * bytePerPixel) & 0x1f) / bytePerPixel);
 600    vmesa->drawX = dPriv->x - vmesa->drawXoff;
 601    vmesa->drawY = dPriv->y;
 602    vmesa->drawW = dPriv->w;
 603    vmesa->drawH = dPriv->h;
 604
 605    vmesa->front.orig = (vmesa->front.offset +
 606                         vmesa->drawY * vmesa->front.pitch +
 607                         vmesa->drawX * bytePerPixel);
 608
 609    vmesa->front.origMap = (vmesa->front.map +
 610                            vmesa->drawY * vmesa->front.pitch +
 611                            vmesa->drawX * bytePerPixel);
 612
 613    vmesa->back.orig = vmesa->back.offset;
 614    vmesa->depth.orig = vmesa->depth.offset;
 615    vmesa->back.origMap = vmesa->back.map;
 616    vmesa->depth.origMap = vmesa->depth.map;
 617
 618    viaCalcViewport(vmesa->glCtx);
 619 }
 620
 621 GLboolean
 622 viaUnbindContext(__DRIcontextPrivate *driContextPriv)
 623 {
 624     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 625     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 626     return GL_TRUE;
 627 }
 628
 629 GLboolean
 630 viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 631                __DRIdrawablePrivate *driDrawPriv,
 632                __DRIdrawablePrivate *driReadPriv)
 633 {
 634     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 635
 636     if (VIA_DEBUG) {
 637         fprintf(stderr, "driContextPriv = %08x\n", (GLuint)driContextPriv);
 638         fprintf(stderr, "driContextPriv = %08x\n", (GLuint)driDrawPriv);
 639         fprintf(stderr, "driContextPriv = %08x\n", (GLuint)driReadPriv);
 640     }
 641
 642     if (driContextPriv) {
 643         viaContextPtr vmesa = (viaContextPtr)driContextPriv->driverPrivate;
 644         GLcontext *ctx = vmesa->glCtx;
 645
 646         if (VIA_DEBUG) fprintf(stderr, "viaMakeCurrent: w = %d\n", vmesa->driDrawable->w);
 647
 648         if ( vmesa->driDrawable != driDrawPriv ) {
 649            driDrawableInitVBlank( driDrawPriv, vmesa->vblank_flags );
 650            vmesa->driDrawable = driDrawPriv;
 651            if ( ! calculate_buffer_parameters( vmesa ) ) {
 652               return GL_FALSE;
 653            }
 654            ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 655         }
 656
 657         _mesa_make_current2(vmesa->glCtx,
 658                             (GLframebuffer *)driDrawPriv->driverPrivate,
 659                             (GLframebuffer *)driReadPriv->driverPrivate);
 660         if (VIA_DEBUG) fprintf(stderr, "Context %d MakeCurrent\n", vmesa->hHWContext);
 661         viaXMesaWindowMoved(vmesa);
 662
 663
 664     }
 665     else {
 666         _mesa_make_current(0,0);
 667     }
 668
 669     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 670     return GL_TRUE;
 671 }
 672
 673 void viaGetLock(viaContextPtr vmesa, GLuint flags)
 674 {
 675     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 676     __DRIscreenPrivate *sPriv = vmesa->driScreen;
 677
 678     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 679
 680     DRI_VALIDATE_DRAWABLE_INFO( sPriv, dPriv );
 681
 682     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 683        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 684        vmesa->newState = ~0;
 685     }
 686
 687     if (vmesa->lastStamp != dPriv->lastStamp) {
 688        viaXMesaWindowMoved(vmesa);
 689        vmesa->lastStamp = dPriv->lastStamp;
 690     }
 691 }
 692
 693
 694 void
 695 viaSwapBuffers(__DRIdrawablePrivate *drawablePrivate)
 696 {
 697     __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *)drawablePrivate;
 698     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 699     if (dPriv && dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 700         viaContextPtr vmesa;
 701         GLcontext *ctx;
 702
 703         vmesa = (viaContextPtr)dPriv->driContextPriv->driverPrivate;
 704         ctx = vmesa->glCtx;
 705         if (ctx->Visual.doubleBufferMode) {
 706             _mesa_notifySwapBuffers(ctx);
 707             if (vmesa->doPageFlip) {
 708                 viaPageFlip(dPriv);
 709             }
 710             else {
 711                 viaCopyBuffer(dPriv);
 712             }
 713         }
 714         else
 715             VIA_FLUSH_DMA(vmesa);
 716     }
 717     else {
 718         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 719     }
 720     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 721 }