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 #include "renderbuffer.h"
  41
  42 #include "swrast/swrast.h"
  43 #include "swrast_setup/swrast_setup.h"
  44 #include "tnl/tnl.h"
  45 #include "array_cache/acache.h"
  46
  47 #include "tnl/t_pipeline.h"
  48
  49 #include "drivers/common/driverfuncs.h"
  50
  51 #include "via_screen.h"
  52 #include "via_dri.h"
  53
  54 #include "via_state.h"
  55 #include "via_tex.h"
  56 #include "via_span.h"
  57 #include "via_tris.h"
  58 #include "via_ioctl.h"
  59 #include "via_fb.h"
  60
  61 #include <stdio.h>
  62 #include "macros.h"
  63 #include "drirenderbuffer.h"
  64
  65 #define need_GL_ARB_multisample
  66 #define need_GL_ARB_point_parameters
  67 #define need_GL_EXT_fog_coord
  68 #define need_GL_EXT_secondary_color
  69 #include "extension_helper.h"
  70
  71 #define DRIVER_DATE     "20060710"
  72
  73 #include "vblank.h"
  74 #include "utils.h"
  75
  76 GLuint VIA_DEBUG = 0;
  77
  78 /**
  79  * Return various strings for \c glGetString.
  80  *
  81  * \sa glGetString
  82  */
  83 static const GLubyte *viaGetString(GLcontext *ctx, GLenum name)
  84 {
  85    static char buffer[128];
  86    unsigned   offset;
  87
  88
  89    switch (name) {
  90    case GL_VENDOR:
  91       return (GLubyte *)"VIA Technology";
  92
  93    case GL_RENDERER: {
  94       static const char * const chipset_names[] = {
  95          "UniChrome",
  96          "CastleRock (CLE266)",
  97          "UniChrome (KM400)",
  98          "UniChrome (K8M800)",
  99          "UniChrome (PM8x0/CN400)",
 100       };
 101       struct via_context *vmesa = VIA_CONTEXT(ctx);
 102       unsigned id = vmesa->viaScreen->deviceID;
 103
 104       offset = driGetRendererString( buffer,
 105                                      chipset_names[(id > VIA_PM800) ? 0 : id],
 106                                      DRIVER_DATE, 0 );
 107       return (GLubyte *)buffer;
 108    }
 109
 110    default:
 111       return NULL;
 112    }
 113 }
 114
 115
 116 /**
 117  * Calculate a width that satisfies the hardware's alignment requirements.
 118  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 119  * 16 pixels.
 120  *
 121  * \param width  Minimum buffer width, in pixels.
 122  *
 123  * \returns A pixel width that meets the alignment requirements.
 124  */
 125 static __inline__ unsigned
 126 buffer_align( unsigned width )
 127 {
 128     return (width + 0x0f) & ~0x0f;
 129 }
 130
 131
 132 static void
 133 viaDeleteRenderbuffer(struct gl_renderbuffer *rb)
 134 {
 135    /* Don't free() since we're contained in via_context struct. */
 136 }
 137
 138 static GLboolean
 139 viaRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb,
 140                        GLenum internalFormat, GLuint width, GLuint height)
 141 {
 142    rb->Width = width;
 143    rb->Height = height;
 144    rb->InternalFormat = internalFormat;
 145    return GL_TRUE;
 146 }
 147
 148
 149 static void
 150 viaInitRenderbuffer(struct gl_renderbuffer *rb, GLenum format)
 151 {
 152    const GLuint name = 0;
 153
 154    _mesa_init_renderbuffer(rb, name);
 155
 156    /* Make sure we're using a null-valued GetPointer routine */
 157    assert(rb->GetPointer(NULL, rb, 0, 0) == NULL);
 158
 159    rb->InternalFormat = format;
 160
 161    if (format == GL_RGBA) {
 162       /* Color */
 163       rb->_BaseFormat = GL_RGBA;
 164       rb->DataType = GL_UNSIGNED_BYTE;
 165    }
 166    else if (format == GL_DEPTH_COMPONENT16) {
 167       /* Depth */
 168       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 169       /* we always Get/Put 32-bit Z values */
 170       rb->DataType = GL_UNSIGNED_INT;
 171    }
 172    else if (format == GL_DEPTH_COMPONENT24) {
 173       /* Depth */
 174       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 175       /* we always Get/Put 32-bit Z values */
 176       rb->DataType = GL_UNSIGNED_INT;
 177    }
 178    else {
 179       /* Stencil */
 180       ASSERT(format == GL_STENCIL_INDEX8_EXT);
 181       rb->_BaseFormat = GL_STENCIL_INDEX;
 182       rb->DataType = GL_UNSIGNED_BYTE;
 183    }
 184
 185    rb->Delete = viaDeleteRenderbuffer;
 186    rb->AllocStorage = viaRenderbufferStorage;
 187 }
 188
 189
 190 /**
 191  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 192  * and stencil) associated with the specified context.
 193  *
 194  * \warning
 195  * This function also calls \c AllocateBuffer to actually allocate the
 196  * buffers.
 197  *
 198  * \sa AllocateBuffer
 199  */
 200 static GLboolean
 201 calculate_buffer_parameters( struct via_context *vmesa,
 202                              struct gl_framebuffer *fb )
 203 {
 204    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 205    const unsigned extra = 32;
 206    unsigned w;
 207    unsigned h;
 208
 209    /* Normally, the renderbuffer would be added to the framebuffer just once
 210     * when the framebuffer was created.  The VIA driver is a bit funny
 211     * though in that the front/back/depth renderbuffers are in the per-context
 212     * state!
 213     * That should be fixed someday.
 214     */
 215
 216    if (!vmesa->front.Base.InternalFormat) {
 217       /* do one-time init for the renderbuffers */
 218       viaInitRenderbuffer(&vmesa->front.Base, GL_RGBA);
 219       viaSetSpanFunctions(&vmesa->front, &fb->Visual);
 220       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &vmesa->front.Base);
 221
 222       if (fb->Visual.doubleBufferMode) {
 223          viaInitRenderbuffer(&vmesa->back.Base, GL_RGBA);
 224          viaSetSpanFunctions(&vmesa->back, &fb->Visual);
 225          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &vmesa->back.Base);
 226       }
 227
 228       if (vmesa->glCtx->Visual.depthBits > 0) {
 229          viaInitRenderbuffer(&vmesa->depth.Base,
 230                              (vmesa->glCtx->Visual.depthBits == 16
 231                               ? GL_DEPTH_COMPONENT16 : GL_DEPTH_COMPONENT24));
 232          viaSetSpanFunctions(&vmesa->depth, &fb->Visual);
 233          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &vmesa->depth.Base);
 234       }
 235
 236       if (vmesa->glCtx->Visual.stencilBits > 0) {
 237          viaInitRenderbuffer(&vmesa->stencil.Base, GL_STENCIL_INDEX8_EXT);
 238          viaSetSpanFunctions(&vmesa->stencil, &fb->Visual);
 239          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &vmesa->stencil.Base);
 240       }
 241    }
 242
 243    assert(vmesa->front.Base.InternalFormat);
 244    assert(vmesa->front.Base.AllocStorage);
 245    if (fb->Visual.doubleBufferMode) {
 246       assert(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 247       assert(vmesa->front.Base.AllocStorage);
 248    }
 249    if (fb->Visual.depthBits) {
 250       assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
 251       assert(vmesa->depth.Base.AllocStorage);
 252    }
 253
 254
 255    /* Allocate front-buffer */
 256    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 257       w = vmesa->driDrawable->w;
 258       h = vmesa->driDrawable->h;
 259
 260       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 261       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 262       vmesa->front.size = vmesa->front.pitch * h;
 263
 264       if (vmesa->front.map)
 265          via_free_draw_buffer(vmesa, &vmesa->front);
 266       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 267          return GL_FALSE;
 268
 269    } else {
 270       w = vmesa->viaScreen->width;
 271       h = vmesa->viaScreen->height;
 272
 273       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 274       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 275       vmesa->front.size = vmesa->front.pitch * h;
 276       if (getenv("ALTERNATE_SCREEN"))
 277         vmesa->front.offset = vmesa->front.size;
 278       else
 279         vmesa->front.offset = 0;
 280       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 281    }
 282
 283
 284    /* Allocate back-buffer */
 285    if (vmesa->hasBack) {
 286       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 287       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift);
 288       vmesa->back.pitch += extra;
 289       vmesa->back.pitch = MIN2(vmesa->back.pitch, vmesa->front.pitch);
 290       vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 291       if (vmesa->back.map)
 292          via_free_draw_buffer(vmesa, &vmesa->back);
 293       if (!via_alloc_draw_buffer(vmesa, &vmesa->back))
 294          return GL_FALSE;
 295    }
 296    else {
 297       if (vmesa->back.map)
 298          via_free_draw_buffer(vmesa, &vmesa->back);
 299       (void) memset( &vmesa->back, 0, sizeof( vmesa->back ) );
 300    }
 301
 302
 303    /* Allocate depth-buffer */
 304    if ( vmesa->hasStencil || vmesa->hasDepth ) {
 305       vmesa->depth.bpp = vmesa->depthBits;
 306       if (vmesa->depth.bpp == 24)
 307          vmesa->depth.bpp = 32;
 308
 309       vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) *
 310                             (vmesa->depth.bpp/8)) + extra;
 311       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 312
 313       if (vmesa->depth.map)
 314          via_free_draw_buffer(vmesa, &vmesa->depth);
 315       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 316          return GL_FALSE;
 317       }
 318    }
 319    else {
 320       if (vmesa->depth.map)
 321          via_free_draw_buffer(vmesa, &vmesa->depth);
 322       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 323    }
 324
 325    /* stencil buffer is same as depth buffer */
 326    vmesa->stencil.handle = vmesa->depth.handle;
 327    vmesa->stencil.size = vmesa->depth.size;
 328    vmesa->stencil.offset = vmesa->depth.offset;
 329    vmesa->stencil.index = vmesa->depth.index;
 330    vmesa->stencil.pitch = vmesa->depth.pitch;
 331    vmesa->stencil.bpp = vmesa->depth.bpp;
 332    vmesa->stencil.map = vmesa->depth.map;
 333    vmesa->stencil.orig = vmesa->depth.orig;
 334    vmesa->stencil.origMap = vmesa->depth.origMap;
 335
 336    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 337        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 338       vmesa->doPageFlip = vmesa->allowPageFlip;
 339       if (vmesa->hasBack) {
 340          assert(vmesa->back.pitch == vmesa->front.pitch);
 341       }
 342    }
 343    else
 344       vmesa->doPageFlip = GL_FALSE;
 345
 346    return GL_TRUE;
 347 }
 348
 349
 350 void viaReAllocateBuffers(GLcontext *ctx, GLframebuffer *drawbuffer,
 351                           GLuint width, GLuint height)
 352 {
 353     struct via_context *vmesa = VIA_CONTEXT(ctx);
 354
 355     calculate_buffer_parameters( vmesa, drawbuffer );
 356
 357     _mesa_resize_framebuffer(ctx, drawbuffer, width, height);
 358 }
 359
 360 static void viaBufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
 361 {
 362     GET_CURRENT_CONTEXT(ctx);
 363     struct via_context *vmesa = VIA_CONTEXT(ctx);
 364     *width = vmesa->driDrawable->w;
 365     *height = vmesa->driDrawable->h;
 366 }
 367
 368 /* Extension strings exported by the Unichrome driver.
 369  */
 370 const struct dri_extension card_extensions[] =
 371 {
 372     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 373     { "GL_ARB_multitexture",               NULL },
 374     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 375     { "GL_ARB_texture_env_add",            NULL },
 376     { "GL_ARB_texture_env_combine",        NULL },
 377 /*    { "GL_ARB_texture_env_dot3",           NULL }, */
 378     { "GL_ARB_texture_mirrored_repeat",    NULL },
 379     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 380     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 381     { "GL_EXT_stencil_wrap",               NULL },
 382     { "GL_EXT_texture_env_combine",        NULL },
 383 /*    { "GL_EXT_texture_env_dot3",           NULL }, */
 384     { "GL_EXT_texture_lod_bias",           NULL },
 385     { "GL_NV_blend_square",                NULL },
 386     { NULL,                                NULL }
 387 };
 388
 389 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 390 extern const struct tnl_pipeline_stage _via_render_stage;
 391
 392 static const struct tnl_pipeline_stage *via_pipeline[] = {
 393     &_tnl_vertex_transform_stage,
 394     &_tnl_normal_transform_stage,
 395     &_tnl_lighting_stage,
 396     &_tnl_fog_coordinate_stage,
 397     &_tnl_texgen_stage,
 398     &_tnl_texture_transform_stage,
 399     /* REMOVE: point attenuation stage */
 400 #if 1
 401     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 402 #endif
 403     &_tnl_render_stage,
 404     0,
 405 };
 406
 407
 408 static const struct dri_debug_control debug_control[] =
 409 {
 410     { "fall",  DEBUG_FALLBACKS },
 411     { "tex",   DEBUG_TEXTURE },
 412     { "ioctl", DEBUG_IOCTL },
 413     { "prim",  DEBUG_PRIMS },
 414     { "vert",  DEBUG_VERTS },
 415     { "state", DEBUG_STATE },
 416     { "verb",  DEBUG_VERBOSE },
 417     { "dri",   DEBUG_DRI },
 418     { "dma",   DEBUG_DMA },
 419     { "san",   DEBUG_SANITY },
 420     { "sync",  DEBUG_SYNC },
 421     { "sleep", DEBUG_SLEEP },
 422     { "pix",   DEBUG_PIXEL },
 423     { "2d",    DEBUG_2D },
 424     { NULL,    0 }
 425 };
 426
 427
 428 static GLboolean
 429 AllocateDmaBuffer(struct via_context *vmesa)
 430 {
 431     if (vmesa->dma)
 432         via_free_dma_buffer(vmesa);
 433
 434     if (!via_alloc_dma_buffer(vmesa))
 435         return GL_FALSE;
 436
 437     vmesa->dmaLow = 0;
 438     vmesa->dmaCliprectAddr = ~0;
 439     return GL_TRUE;
 440 }
 441
 442 static void
 443 FreeBuffer(struct via_context *vmesa)
 444 {
 445     if (vmesa->front.map && vmesa->drawType == GLX_PBUFFER_BIT)
 446         via_free_draw_buffer(vmesa, &vmesa->front);
 447
 448     if (vmesa->back.map)
 449         via_free_draw_buffer(vmesa, &vmesa->back);
 450
 451     if (vmesa->depth.map)
 452         via_free_draw_buffer(vmesa, &vmesa->depth);
 453
 454     if (vmesa->breadcrumb.map)
 455         via_free_draw_buffer(vmesa, &vmesa->breadcrumb);
 456
 457     if (vmesa->dma)
 458         via_free_dma_buffer(vmesa);
 459 }
 460
 461
 462 GLboolean
 463 viaCreateContext(const __GLcontextModes *visual,
 464                  __DRIcontextPrivate *driContextPriv,
 465                  void *sharedContextPrivate)
 466 {
 467     GLcontext *ctx, *shareCtx;
 468     struct via_context *vmesa;
 469     __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 470     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 471     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 472         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 473     struct dd_function_table functions;
 474
 475     /* Allocate via context */
 476     vmesa = (struct via_context *) CALLOC_STRUCT(via_context);
 477     if (!vmesa) {
 478         return GL_FALSE;
 479     }
 480
 481     /* Parse configuration files.
 482      */
 483     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 484                          sPriv->myNum, "via");
 485
 486     /* pick back buffer */
 487     vmesa->hasBack = visual->doubleBufferMode;
 488
 489     switch(visual->depthBits) {
 490     case 0:
 491        vmesa->hasDepth = GL_FALSE;
 492        vmesa->depthBits = 0;
 493        vmesa->depth_max = 1.0;
 494        break;
 495     case 16:
 496        vmesa->hasDepth = GL_TRUE;
 497        vmesa->depthBits = visual->depthBits;
 498        vmesa->have_hw_stencil = GL_FALSE;
 499        vmesa->depth_max = (GLfloat)0xffff;
 500        vmesa->depth_clear_mask = 0xf << 28;
 501        vmesa->ClearDepth = 0xffff;
 502        vmesa->polygon_offset_scale = 1.0 / vmesa->depth_max;
 503        break;
 504     case 24:
 505        vmesa->hasDepth = GL_TRUE;
 506        vmesa->depthBits = visual->depthBits;
 507        vmesa->depth_max = (GLfloat) 0xffffff;
 508        vmesa->depth_clear_mask = 0xe << 28;
 509        vmesa->ClearDepth = 0xffffff00;
 510
 511        assert(visual->haveStencilBuffer);
 512        assert(visual->stencilBits == 8);
 513
 514        vmesa->have_hw_stencil = GL_TRUE;
 515        vmesa->stencilBits = visual->stencilBits;
 516        vmesa->stencil_clear_mask = 0x1 << 28;
 517        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 518        break;
 519     case 32:
 520        vmesa->hasDepth = GL_TRUE;
 521        vmesa->depthBits = visual->depthBits;
 522        assert(!visual->haveStencilBuffer);
 523        vmesa->have_hw_stencil = GL_FALSE;
 524        vmesa->depth_max = (GLfloat)0xffffffff;
 525        vmesa->depth_clear_mask = 0xf << 28;
 526        vmesa->ClearDepth = 0xffffffff;
 527        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 528        break;
 529     default:
 530        assert(0);
 531        break;
 532     }
 533
 534     make_empty_list(&vmesa->freed_tex_buffers);
 535     make_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]);
 536     make_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]);
 537     make_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]);
 538
 539     _mesa_init_driver_functions(&functions);
 540     viaInitTextureFuncs(&functions);
 541
 542     /* Allocate the Mesa context */
 543     if (sharedContextPrivate)
 544         shareCtx = ((struct via_context *) sharedContextPrivate)->glCtx;
 545     else
 546         shareCtx = NULL;
 547
 548     vmesa->glCtx = _mesa_create_context(visual, shareCtx, &functions,
 549                                         (void*) vmesa);
 550
 551     vmesa->shareCtx = shareCtx;
 552
 553     if (!vmesa->glCtx) {
 554         FREE(vmesa);
 555         return GL_FALSE;
 556     }
 557     driContextPriv->driverPrivate = vmesa;
 558
 559     ctx = vmesa->glCtx;
 560
 561     ctx->Const.MaxTextureLevels = 11;
 562     ctx->Const.MaxTextureUnits = 2;
 563     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 564     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 565
 566     ctx->Const.MinLineWidth = 1.0;
 567     ctx->Const.MinLineWidthAA = 1.0;
 568     ctx->Const.MaxLineWidth = 1.0;
 569     ctx->Const.MaxLineWidthAA = 1.0;
 570     ctx->Const.LineWidthGranularity = 1.0;
 571
 572     ctx->Const.MinPointSize = 1.0;
 573     ctx->Const.MinPointSizeAA = 1.0;
 574     ctx->Const.MaxPointSize = 1.0;
 575     ctx->Const.MaxPointSizeAA = 1.0;
 576     ctx->Const.PointSizeGranularity = 1.0;
 577
 578     ctx->Driver.GetBufferSize = viaBufferSize;
 579 /*    ctx->Driver.ResizeBuffers = _swrast_alloc_buffers;  *//* FIXME ?? */
 580     ctx->Driver.GetString = viaGetString;
 581
 582     ctx->DriverCtx = (void *)vmesa;
 583     vmesa->glCtx = ctx;
 584
 585     /* Initialize the software rasterizer and helper modules.
 586      */
 587     _swrast_CreateContext(ctx);
 588     _ac_CreateContext(ctx);
 589     _tnl_CreateContext(ctx);
 590     _swsetup_CreateContext(ctx);
 591
 592     /* Install the customized pipeline:
 593      */
 594     _tnl_destroy_pipeline(ctx);
 595     _tnl_install_pipeline(ctx, via_pipeline);
 596
 597     /* Configure swrast and T&L to match hardware characteristics:
 598      */
 599     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 600     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 601     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 602     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 603
 604 /*     vmesa->display = dpy; */
 605     vmesa->display = sPriv->display;
 606
 607     vmesa->hHWContext = driContextPriv->hHWContext;
 608     vmesa->driFd = sPriv->fd;
 609     vmesa->driHwLock = &sPriv->pSAREA->lock;
 610
 611     vmesa->viaScreen = viaScreen;
 612     vmesa->driScreen = sPriv;
 613     vmesa->sarea = saPriv;
 614
 615     vmesa->renderIndex = ~0;
 616     vmesa->setupIndex = ~0;
 617     vmesa->hwPrimitive = GL_POLYGON+1;
 618
 619     /* KW: Hardwire this.  Was previously set bogusly in
 620      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 621      */
 622     vmesa->drawType = GLX_WINDOW_BIT;
 623
 624
 625     _math_matrix_ctr(&vmesa->ViewportMatrix);
 626
 627     /* Do this early, before VIA_FLUSH_DMA can be called:
 628      */
 629     if (!AllocateDmaBuffer(vmesa)) {
 630         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 631         FreeBuffer(vmesa);
 632         FREE(vmesa);
 633         return GL_FALSE;
 634     }
 635
 636     /* Allocate a small piece of fb memory for synchronization:
 637      */
 638     vmesa->breadcrumb.bpp = 32;
 639     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 640     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 641
 642     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 643         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 644         FreeBuffer(vmesa);
 645         FREE(vmesa);
 646         return GL_FALSE;
 647     }
 648
 649     driInitExtensions( ctx, card_extensions, GL_TRUE );
 650     viaInitStateFuncs(ctx);
 651     viaInitTriFuncs(ctx);
 652     viaInitSpanFuncs(ctx);
 653     viaInitIoctlFuncs(ctx);
 654     viaInitState(ctx);
 655
 656     if (getenv("VIA_DEBUG"))
 657        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 658                                         debug_control );
 659
 660     if (getenv("VIA_NO_RAST"))
 661        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 662
 663     /* I don't understand why this isn't working:
 664      */
 665     vmesa->vblank_flags =
 666        vmesa->viaScreen->irqEnabled ?
 667         driGetDefaultVBlankFlags(&vmesa->optionCache) : VBLANK_FLAG_NO_IRQ;
 668
 669     /* Hack this up in its place:
 670      */
 671     vmesa->vblank_flags = (getenv("VIA_VSYNC") ?
 672                            VBLANK_FLAG_SYNC : VBLANK_FLAG_NO_IRQ);
 673
 674     if (getenv("VIA_PAGEFLIP"))
 675        vmesa->allowPageFlip = 1;
 676
 677     (*dri_interface->getUST)( &vmesa->swap_ust );
 678
 679
 680     vmesa->regMMIOBase = (GLuint *)((unsigned long)viaScreen->reg);
 681     vmesa->pnGEMode = (GLuint *)((unsigned long)viaScreen->reg + 0x4);
 682     vmesa->regEngineStatus = (GLuint *)((unsigned long)viaScreen->reg + 0x400);
 683     vmesa->regTranSet = (GLuint *)((unsigned long)viaScreen->reg + 0x43C);
 684     vmesa->regTranSpace = (GLuint *)((unsigned long)viaScreen->reg + 0x440);
 685     vmesa->agpBase = viaScreen->agpBase;
 686
 687
 688     return GL_TRUE;
 689 }
 690
 691 void
 692 viaDestroyContext(__DRIcontextPrivate *driContextPriv)
 693 {
 694     GET_CURRENT_CONTEXT(ctx);
 695     struct via_context *vmesa =
 696        (struct via_context *)driContextPriv->driverPrivate;
 697     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 698     assert(vmesa); /* should never be null */
 699
 700     /* check if we're deleting the currently bound context */
 701     if (vmesa == current) {
 702       VIA_FLUSH_DMA(vmesa);
 703       _mesa_make_current(NULL, NULL, NULL);
 704     }
 705
 706     if (vmesa) {
 707         viaWaitIdle(vmesa, GL_FALSE);
 708         if (vmesa->doPageFlip) {
 709            LOCK_HARDWARE(vmesa);
 710            if (vmesa->pfCurrentOffset != 0) {
 711               fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 712               viaResetPageFlippingLocked(vmesa);
 713            }
 714            UNLOCK_HARDWARE(vmesa);
 715         }
 716
 717         _swsetup_DestroyContext(vmesa->glCtx);
 718         _tnl_DestroyContext(vmesa->glCtx);
 719         _ac_DestroyContext(vmesa->glCtx);
 720         _swrast_DestroyContext(vmesa->glCtx);
 721         /* free the Mesa context */
 722         _mesa_destroy_context(vmesa->glCtx);
 723         /* release our data */
 724         FreeBuffer(vmesa);
 725
 726         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 727         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 728         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 729         assert (is_empty_list(&vmesa->freed_tex_buffers));
 730
 731         FREE(vmesa);
 732     }
 733 }
 734
 735
 736 void viaXMesaWindowMoved(struct via_context *vmesa)
 737 {
 738    __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 739    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 740
 741    if (!dPriv)
 742       return;
 743
 744    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferMask[0]) {
 745    case BUFFER_BIT_BACK_LEFT:
 746       if (dPriv->numBackClipRects == 0) {
 747          vmesa->numClipRects = dPriv->numClipRects;
 748          vmesa->pClipRects = dPriv->pClipRects;
 749       }
 750       else {
 751          vmesa->numClipRects = dPriv->numBackClipRects;
 752          vmesa->pClipRects = dPriv->pBackClipRects;
 753       }
 754       break;
 755    case BUFFER_BIT_FRONT_LEFT:
 756       vmesa->numClipRects = dPriv->numClipRects;
 757       vmesa->pClipRects = dPriv->pClipRects;
 758       break;
 759    default:
 760       vmesa->numClipRects = 0;
 761       break;
 762    }
 763
 764    if (vmesa->drawW != dPriv->w ||
 765        vmesa->drawH != dPriv->h)
 766       calculate_buffer_parameters( vmesa, vmesa->glCtx->DrawBuffer );
 767
 768    vmesa->drawXoff = (GLuint)(((dPriv->x * bytePerPixel) & 0x1f) /
 769                               bytePerPixel);
 770    vmesa->drawX = dPriv->x - vmesa->drawXoff;
 771    vmesa->drawY = dPriv->y;
 772    vmesa->drawW = dPriv->w;
 773    vmesa->drawH = dPriv->h;
 774
 775    vmesa->front.orig = (vmesa->front.offset +
 776                         vmesa->drawY * vmesa->front.pitch +
 777                         vmesa->drawX * bytePerPixel);
 778
 779    vmesa->front.origMap = (vmesa->front.map +
 780                            vmesa->drawY * vmesa->front.pitch +
 781                            vmesa->drawX * bytePerPixel);
 782
 783    vmesa->back.orig = vmesa->back.offset;
 784    vmesa->depth.orig = vmesa->depth.offset;
 785    vmesa->back.origMap = vmesa->back.map;
 786    vmesa->depth.origMap = vmesa->depth.map;
 787
 788    viaCalcViewport(vmesa->glCtx);
 789 }
 790
 791 GLboolean
 792 viaUnbindContext(__DRIcontextPrivate *driContextPriv)
 793 {
 794     return GL_TRUE;
 795 }
 796
 797 GLboolean
 798 viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 799                __DRIdrawablePrivate *driDrawPriv,
 800                __DRIdrawablePrivate *driReadPriv)
 801 {
 802     if (VIA_DEBUG & DEBUG_DRI) {
 803         fprintf(stderr, "driContextPriv = %016lx\n", (unsigned long)driContextPriv);
 804         fprintf(stderr, "driDrawPriv = %016lx\n", (unsigned long)driDrawPriv);
 805         fprintf(stderr, "driReadPriv = %016lx\n", (unsigned long)driReadPriv);
 806     }
 807
 808     if (driContextPriv) {
 809         struct via_context *vmesa =
 810            (struct via_context *)driContextPriv->driverPrivate;
 811         GLcontext *ctx = vmesa->glCtx;
 812         struct gl_framebuffer *drawBuffer, *readBuffer;
 813
 814         drawBuffer = (GLframebuffer *)driDrawPriv->driverPrivate;
 815         readBuffer = (GLframebuffer *)driReadPriv->driverPrivate;
 816
 817         if ( vmesa->driDrawable != driDrawPriv ) {
 818            driDrawableInitVBlank( driDrawPriv, vmesa->vblank_flags,
 819                                   &vmesa->vbl_seq );
 820            vmesa->driDrawable = driDrawPriv;
 821            if ( ! calculate_buffer_parameters( vmesa, drawBuffer ) ) {
 822               return GL_FALSE;
 823            }
 824         }
 825
 826         _mesa_make_current(vmesa->glCtx, drawBuffer, readBuffer);
 827
 828         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 829
 830         viaXMesaWindowMoved(vmesa);
 831         ctx->Driver.Scissor(vmesa->glCtx,
 832                             vmesa->glCtx->Scissor.X,
 833                             vmesa->glCtx->Scissor.Y,
 834                             vmesa->glCtx->Scissor.Width,
 835                             vmesa->glCtx->Scissor.Height);
 836     }
 837     else {
 838         _mesa_make_current(NULL, NULL, NULL);
 839     }
 840
 841     return GL_TRUE;
 842 }
 843
 844 void viaGetLock(struct via_context *vmesa, GLuint flags)
 845 {
 846     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 847     __DRIscreenPrivate *sPriv = vmesa->driScreen;
 848
 849     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 850
 851     DRI_VALIDATE_DRAWABLE_INFO( sPriv, dPriv );
 852
 853     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 854        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 855        vmesa->newEmitState = ~0;
 856     }
 857
 858     if (vmesa->lastStamp != dPriv->lastStamp) {
 859        viaXMesaWindowMoved(vmesa);
 860        driUpdateFramebufferSize(vmesa->glCtx, dPriv);
 861        vmesa->newEmitState = ~0;
 862        vmesa->lastStamp = dPriv->lastStamp;
 863     }
 864
 865     if (vmesa->doPageFlip &&
 866         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 867        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 868        viaResetPageFlippingLocked(vmesa);
 869     }
 870 }
 871
 872
 873 void
 874 viaSwapBuffers(__DRIdrawablePrivate *drawablePrivate)
 875 {
 876     __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *)drawablePrivate;
 877
 878     if (dPriv &&
 879         dPriv->driContextPriv &&
 880         dPriv->driContextPriv->driverPrivate) {
 881         struct via_context *vmesa =
 882            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 883         GLcontext *ctx = vmesa->glCtx;
 884
 885         _mesa_notifySwapBuffers(ctx);
 886
 887         if (ctx->Visual.doubleBufferMode) {
 888             if (vmesa->doPageFlip) {
 889                 viaPageFlip(dPriv);
 890             }
 891             else {
 892                 viaCopyBuffer(dPriv);
 893             }
 894         }
 895         else
 896             VIA_FLUSH_DMA(vmesa);
 897     }
 898     else {
 899         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 900     }
 901 }