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     "20050526"
  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       assert(vmesa->back.pitch == vmesa->front.pitch);
 340    }
 341    else
 342       vmesa->doPageFlip = GL_FALSE;
 343
 344    return GL_TRUE;
 345 }
 346
 347
 348 void viaReAllocateBuffers(GLcontext *ctx, GLframebuffer *drawbuffer,
 349                           GLuint width, GLuint height)
 350 {
 351     struct via_context *vmesa = VIA_CONTEXT(ctx);
 352
 353     calculate_buffer_parameters( vmesa, drawbuffer );
 354
 355     _mesa_resize_framebuffer(ctx, drawbuffer, width, height);
 356 }
 357
 358 static void viaBufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
 359 {
 360     GET_CURRENT_CONTEXT(ctx);
 361     struct via_context *vmesa = VIA_CONTEXT(ctx);
 362     *width = vmesa->driDrawable->w;
 363     *height = vmesa->driDrawable->h;
 364 }
 365
 366 /* Extension strings exported by the Unichrome driver.
 367  */
 368 const struct dri_extension card_extensions[] =
 369 {
 370     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 371     { "GL_ARB_multitexture",               NULL },
 372     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 373     { "GL_ARB_texture_env_add",            NULL },
 374     { "GL_ARB_texture_env_combine",        NULL },
 375 /*    { "GL_ARB_texture_env_dot3",           NULL }, */
 376     { "GL_ARB_texture_mirrored_repeat",    NULL },
 377     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 378     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 379     { "GL_EXT_stencil_wrap",               NULL },
 380     { "GL_EXT_texture_env_combine",        NULL },
 381 /*    { "GL_EXT_texture_env_dot3",           NULL }, */
 382     { "GL_EXT_texture_lod_bias",           NULL },
 383     { "GL_NV_blend_square",                NULL },
 384     { NULL,                                NULL }
 385 };
 386
 387 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 388 extern const struct tnl_pipeline_stage _via_render_stage;
 389
 390 static const struct tnl_pipeline_stage *via_pipeline[] = {
 391     &_tnl_vertex_transform_stage,
 392     &_tnl_normal_transform_stage,
 393     &_tnl_lighting_stage,
 394     &_tnl_fog_coordinate_stage,
 395     &_tnl_texgen_stage,
 396     &_tnl_texture_transform_stage,
 397     /* REMOVE: point attenuation stage */
 398 #if 1
 399     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 400 #endif
 401     &_tnl_render_stage,
 402     0,
 403 };
 404
 405
 406 static const struct dri_debug_control debug_control[] =
 407 {
 408     { "fall",  DEBUG_FALLBACKS },
 409     { "tex",   DEBUG_TEXTURE },
 410     { "ioctl", DEBUG_IOCTL },
 411     { "prim",  DEBUG_PRIMS },
 412     { "vert",  DEBUG_VERTS },
 413     { "state", DEBUG_STATE },
 414     { "verb",  DEBUG_VERBOSE },
 415     { "dri",   DEBUG_DRI },
 416     { "dma",   DEBUG_DMA },
 417     { "san",   DEBUG_SANITY },
 418     { "sync",  DEBUG_SYNC },
 419     { "sleep", DEBUG_SLEEP },
 420     { "pix",   DEBUG_PIXEL },
 421     { "2d",    DEBUG_2D },
 422     { NULL,    0 }
 423 };
 424
 425
 426 static GLboolean
 427 AllocateDmaBuffer(struct via_context *vmesa)
 428 {
 429     if (vmesa->dma)
 430         via_free_dma_buffer(vmesa);
 431
 432     if (!via_alloc_dma_buffer(vmesa))
 433         return GL_FALSE;
 434
 435     vmesa->dmaLow = 0;
 436     vmesa->dmaCliprectAddr = ~0;
 437     return GL_TRUE;
 438 }
 439
 440 static void
 441 FreeBuffer(struct via_context *vmesa)
 442 {
 443     if (vmesa->front.map && vmesa->drawType == GLX_PBUFFER_BIT)
 444         via_free_draw_buffer(vmesa, &vmesa->front);
 445
 446     if (vmesa->back.map)
 447         via_free_draw_buffer(vmesa, &vmesa->back);
 448
 449     if (vmesa->depth.map)
 450         via_free_draw_buffer(vmesa, &vmesa->depth);
 451
 452     if (vmesa->breadcrumb.map)
 453         via_free_draw_buffer(vmesa, &vmesa->breadcrumb);
 454
 455     if (vmesa->dma)
 456         via_free_dma_buffer(vmesa);
 457 }
 458
 459
 460 GLboolean
 461 viaCreateContext(const __GLcontextModes *visual,
 462                  __DRIcontextPrivate *driContextPriv,
 463                  void *sharedContextPrivate)
 464 {
 465     GLcontext *ctx, *shareCtx;
 466     struct via_context *vmesa;
 467     __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 468     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 469     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 470         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 471     struct dd_function_table functions;
 472
 473     /* Allocate via context */
 474     vmesa = (struct via_context *) CALLOC_STRUCT(via_context);
 475     if (!vmesa) {
 476         return GL_FALSE;
 477     }
 478
 479     /* Parse configuration files.
 480      */
 481     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 482                          sPriv->myNum, "via");
 483
 484     /* pick back buffer */
 485     vmesa->hasBack = visual->doubleBufferMode;
 486
 487     switch(visual->depthBits) {
 488     case 0:
 489        vmesa->hasDepth = GL_FALSE;
 490        vmesa->depthBits = 0;
 491        vmesa->depth_max = 1.0;
 492        break;
 493     case 16:
 494        vmesa->hasDepth = GL_TRUE;
 495        vmesa->depthBits = visual->depthBits;
 496        vmesa->have_hw_stencil = GL_FALSE;
 497        vmesa->depth_max = (GLfloat)0xffff;
 498        vmesa->depth_clear_mask = 0xf << 28;
 499        vmesa->ClearDepth = 0xffff;
 500        vmesa->polygon_offset_scale = 1.0 / vmesa->depth_max;
 501        break;
 502     case 24:
 503        vmesa->hasDepth = GL_TRUE;
 504        vmesa->depthBits = visual->depthBits;
 505        vmesa->depth_max = (GLfloat) 0xffffff;
 506        vmesa->depth_clear_mask = 0xe << 28;
 507        vmesa->ClearDepth = 0xffffff00;
 508
 509        assert(visual->haveStencilBuffer);
 510        assert(visual->stencilBits == 8);
 511
 512        vmesa->have_hw_stencil = GL_TRUE;
 513        vmesa->stencilBits = visual->stencilBits;
 514        vmesa->stencil_clear_mask = 0x1 << 28;
 515        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 516        break;
 517     case 32:
 518        vmesa->hasDepth = GL_TRUE;
 519        vmesa->depthBits = visual->depthBits;
 520        assert(!visual->haveStencilBuffer);
 521        vmesa->have_hw_stencil = GL_FALSE;
 522        vmesa->depth_max = (GLfloat)0xffffffff;
 523        vmesa->depth_clear_mask = 0xf << 28;
 524        vmesa->ClearDepth = 0xffffffff;
 525        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 526        break;
 527     default:
 528        assert(0);
 529        break;
 530     }
 531
 532     make_empty_list(&vmesa->freed_tex_buffers);
 533     make_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]);
 534     make_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]);
 535     make_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]);
 536
 537     _mesa_init_driver_functions(&functions);
 538     viaInitTextureFuncs(&functions);
 539
 540     /* Allocate the Mesa context */
 541     if (sharedContextPrivate)
 542         shareCtx = ((struct via_context *) sharedContextPrivate)->glCtx;
 543     else
 544         shareCtx = NULL;
 545
 546     vmesa->glCtx = _mesa_create_context(visual, shareCtx, &functions,
 547                                         (void*) vmesa);
 548
 549     vmesa->shareCtx = shareCtx;
 550
 551     if (!vmesa->glCtx) {
 552         FREE(vmesa);
 553         return GL_FALSE;
 554     }
 555     driContextPriv->driverPrivate = vmesa;
 556
 557     ctx = vmesa->glCtx;
 558
 559     ctx->Const.MaxTextureLevels = 10;
 560     ctx->Const.MaxTextureUnits = 2;
 561     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 562     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 563
 564     ctx->Const.MinLineWidth = 1.0;
 565     ctx->Const.MinLineWidthAA = 1.0;
 566     ctx->Const.MaxLineWidth = 1.0;
 567     ctx->Const.MaxLineWidthAA = 1.0;
 568     ctx->Const.LineWidthGranularity = 1.0;
 569
 570     ctx->Const.MinPointSize = 1.0;
 571     ctx->Const.MinPointSizeAA = 1.0;
 572     ctx->Const.MaxPointSize = 1.0;
 573     ctx->Const.MaxPointSizeAA = 1.0;
 574     ctx->Const.PointSizeGranularity = 1.0;
 575
 576     ctx->Driver.GetBufferSize = viaBufferSize;
 577 /*    ctx->Driver.ResizeBuffers = _swrast_alloc_buffers;  *//* FIXME ?? */
 578     ctx->Driver.GetString = viaGetString;
 579
 580     ctx->DriverCtx = (void *)vmesa;
 581     vmesa->glCtx = ctx;
 582
 583     /* Initialize the software rasterizer and helper modules.
 584      */
 585     _swrast_CreateContext(ctx);
 586     _ac_CreateContext(ctx);
 587     _tnl_CreateContext(ctx);
 588     _swsetup_CreateContext(ctx);
 589
 590     /* Install the customized pipeline:
 591      */
 592     _tnl_destroy_pipeline(ctx);
 593     _tnl_install_pipeline(ctx, via_pipeline);
 594
 595     /* Configure swrast and T&L to match hardware characteristics:
 596      */
 597     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 598     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 599     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 600     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 601
 602 /*     vmesa->display = dpy; */
 603     vmesa->display = sPriv->display;
 604
 605     vmesa->hHWContext = driContextPriv->hHWContext;
 606     vmesa->driFd = sPriv->fd;
 607     vmesa->driHwLock = &sPriv->pSAREA->lock;
 608
 609     vmesa->viaScreen = viaScreen;
 610     vmesa->driScreen = sPriv;
 611     vmesa->sarea = saPriv;
 612
 613     vmesa->renderIndex = ~0;
 614     vmesa->setupIndex = ~0;
 615     vmesa->hwPrimitive = GL_POLYGON+1;
 616
 617     /* KW: Hardwire this.  Was previously set bogusly in
 618      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 619      */
 620     vmesa->drawType = GLX_WINDOW_BIT;
 621
 622
 623     _math_matrix_ctr(&vmesa->ViewportMatrix);
 624
 625     /* Do this early, before VIA_FLUSH_DMA can be called:
 626      */
 627     if (!AllocateDmaBuffer(vmesa)) {
 628         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 629         FreeBuffer(vmesa);
 630         FREE(vmesa);
 631         return GL_FALSE;
 632     }
 633
 634     /* Allocate a small piece of fb memory for synchronization:
 635      */
 636     vmesa->breadcrumb.bpp = 32;
 637     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 638     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 639
 640     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 641         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 642         FreeBuffer(vmesa);
 643         FREE(vmesa);
 644         return GL_FALSE;
 645     }
 646
 647     driInitExtensions( ctx, card_extensions, GL_TRUE );
 648     viaInitStateFuncs(ctx);
 649     viaInitTriFuncs(ctx);
 650     viaInitSpanFuncs(ctx);
 651     viaInitIoctlFuncs(ctx);
 652     viaInitState(ctx);
 653
 654     if (getenv("VIA_DEBUG"))
 655        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 656                                         debug_control );
 657
 658     if (getenv("VIA_NO_RAST"))
 659        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 660
 661     /* I don't understand why this isn't working:
 662      */
 663     vmesa->vblank_flags =
 664        vmesa->viaScreen->irqEnabled ?
 665         driGetDefaultVBlankFlags(&vmesa->optionCache) : VBLANK_FLAG_NO_IRQ;
 666
 667     /* Hack this up in its place:
 668      */
 669     vmesa->vblank_flags = (getenv("VIA_VSYNC") ?
 670                            VBLANK_FLAG_SYNC : VBLANK_FLAG_NO_IRQ);
 671
 672     if (getenv("VIA_PAGEFLIP"))
 673        vmesa->allowPageFlip = 1;
 674
 675     (*dri_interface->getUST)( &vmesa->swap_ust );
 676
 677
 678     vmesa->regMMIOBase = (GLuint *)((unsigned long)viaScreen->reg);
 679     vmesa->pnGEMode = (GLuint *)((unsigned long)viaScreen->reg + 0x4);
 680     vmesa->regEngineStatus = (GLuint *)((unsigned long)viaScreen->reg + 0x400);
 681     vmesa->regTranSet = (GLuint *)((unsigned long)viaScreen->reg + 0x43C);
 682     vmesa->regTranSpace = (GLuint *)((unsigned long)viaScreen->reg + 0x440);
 683     vmesa->agpBase = viaScreen->agpBase;
 684
 685
 686     return GL_TRUE;
 687 }
 688
 689 void
 690 viaDestroyContext(__DRIcontextPrivate *driContextPriv)
 691 {
 692     GET_CURRENT_CONTEXT(ctx);
 693     struct via_context *vmesa =
 694        (struct via_context *)driContextPriv->driverPrivate;
 695     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 696     assert(vmesa); /* should never be null */
 697
 698     /* check if we're deleting the currently bound context */
 699     if (vmesa == current) {
 700       VIA_FLUSH_DMA(vmesa);
 701       _mesa_make_current(NULL, NULL, NULL);
 702     }
 703
 704     if (vmesa) {
 705         viaWaitIdle(vmesa, GL_FALSE);
 706         if (vmesa->doPageFlip) {
 707            LOCK_HARDWARE(vmesa);
 708            if (vmesa->pfCurrentOffset != 0) {
 709               fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 710               viaResetPageFlippingLocked(vmesa);
 711            }
 712            UNLOCK_HARDWARE(vmesa);
 713         }
 714
 715         _swsetup_DestroyContext(vmesa->glCtx);
 716         _tnl_DestroyContext(vmesa->glCtx);
 717         _ac_DestroyContext(vmesa->glCtx);
 718         _swrast_DestroyContext(vmesa->glCtx);
 719         /* free the Mesa context */
 720         _mesa_destroy_context(vmesa->glCtx);
 721         /* release our data */
 722         FreeBuffer(vmesa);
 723
 724         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 725         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 726         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 727         assert (is_empty_list(&vmesa->freed_tex_buffers));
 728
 729         FREE(vmesa);
 730     }
 731 }
 732
 733
 734 void viaXMesaWindowMoved(struct via_context *vmesa)
 735 {
 736    __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 737    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 738
 739    if (!dPriv)
 740       return;
 741
 742    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferMask[0]) {
 743    case BUFFER_BIT_BACK_LEFT:
 744       if (dPriv->numBackClipRects == 0) {
 745          vmesa->numClipRects = dPriv->numClipRects;
 746          vmesa->pClipRects = dPriv->pClipRects;
 747       }
 748       else {
 749          vmesa->numClipRects = dPriv->numBackClipRects;
 750          vmesa->pClipRects = dPriv->pBackClipRects;
 751       }
 752       break;
 753    case BUFFER_BIT_FRONT_LEFT:
 754       vmesa->numClipRects = dPriv->numClipRects;
 755       vmesa->pClipRects = dPriv->pClipRects;
 756       break;
 757    default:
 758       vmesa->numClipRects = 0;
 759       break;
 760    }
 761
 762    if (vmesa->drawW != dPriv->w ||
 763        vmesa->drawH != dPriv->h)
 764       calculate_buffer_parameters( vmesa, vmesa->glCtx->DrawBuffer );
 765
 766    vmesa->drawXoff = (GLuint)(((dPriv->x * bytePerPixel) & 0x1f) /
 767                               bytePerPixel);
 768    vmesa->drawX = dPriv->x - vmesa->drawXoff;
 769    vmesa->drawY = dPriv->y;
 770    vmesa->drawW = dPriv->w;
 771    vmesa->drawH = dPriv->h;
 772
 773    vmesa->front.orig = (vmesa->front.offset +
 774                         vmesa->drawY * vmesa->front.pitch +
 775                         vmesa->drawX * bytePerPixel);
 776
 777    vmesa->front.origMap = (vmesa->front.map +
 778                            vmesa->drawY * vmesa->front.pitch +
 779                            vmesa->drawX * bytePerPixel);
 780
 781    vmesa->back.orig = vmesa->back.offset;
 782    vmesa->depth.orig = vmesa->depth.offset;
 783    vmesa->back.origMap = vmesa->back.map;
 784    vmesa->depth.origMap = vmesa->depth.map;
 785
 786    viaCalcViewport(vmesa->glCtx);
 787 }
 788
 789 GLboolean
 790 viaUnbindContext(__DRIcontextPrivate *driContextPriv)
 791 {
 792     return GL_TRUE;
 793 }
 794
 795 GLboolean
 796 viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 797                __DRIdrawablePrivate *driDrawPriv,
 798                __DRIdrawablePrivate *driReadPriv)
 799 {
 800     if (VIA_DEBUG & DEBUG_DRI) {
 801         fprintf(stderr, "driContextPriv = %016lx\n", (unsigned long)driContextPriv);
 802         fprintf(stderr, "driDrawPriv = %016lx\n", (unsigned long)driDrawPriv);
 803         fprintf(stderr, "driReadPriv = %016lx\n", (unsigned long)driReadPriv);
 804     }
 805
 806     if (driContextPriv) {
 807         struct via_context *vmesa =
 808            (struct via_context *)driContextPriv->driverPrivate;
 809         GLcontext *ctx = vmesa->glCtx;
 810         struct gl_framebuffer *drawBuffer, *readBuffer;
 811
 812         drawBuffer = (GLframebuffer *)driDrawPriv->driverPrivate;
 813         readBuffer = (GLframebuffer *)driReadPriv->driverPrivate;
 814
 815         if ( vmesa->driDrawable != driDrawPriv ) {
 816            driDrawableInitVBlank( driDrawPriv, vmesa->vblank_flags );
 817            vmesa->driDrawable = driDrawPriv;
 818            if ( ! calculate_buffer_parameters( vmesa, drawBuffer ) ) {
 819               return GL_FALSE;
 820            }
 821         }
 822
 823         _mesa_make_current(vmesa->glCtx, drawBuffer, readBuffer);
 824
 825         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 826
 827         viaXMesaWindowMoved(vmesa);
 828         ctx->Driver.Scissor(vmesa->glCtx,
 829                             vmesa->glCtx->Scissor.X,
 830                             vmesa->glCtx->Scissor.Y,
 831                             vmesa->glCtx->Scissor.Width,
 832                             vmesa->glCtx->Scissor.Height);
 833     }
 834     else {
 835         _mesa_make_current(NULL, NULL, NULL);
 836     }
 837
 838     return GL_TRUE;
 839 }
 840
 841 void viaGetLock(struct via_context *vmesa, GLuint flags)
 842 {
 843     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 844     __DRIscreenPrivate *sPriv = vmesa->driScreen;
 845
 846     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 847
 848     DRI_VALIDATE_DRAWABLE_INFO( sPriv, dPriv );
 849
 850     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 851        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 852        vmesa->newEmitState = ~0;
 853     }
 854
 855     if (vmesa->lastStamp != dPriv->lastStamp) {
 856        viaXMesaWindowMoved(vmesa);
 857        driUpdateFramebufferSize(vmesa->glCtx, dPriv);
 858        vmesa->newEmitState = ~0;
 859        vmesa->lastStamp = dPriv->lastStamp;
 860     }
 861
 862     if (vmesa->doPageFlip &&
 863         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 864        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 865        viaResetPageFlippingLocked(vmesa);
 866     }
 867 }
 868
 869
 870 void
 871 viaSwapBuffers(__DRIdrawablePrivate *drawablePrivate)
 872 {
 873     __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *)drawablePrivate;
 874
 875     if (dPriv &&
 876         dPriv->driContextPriv &&
 877         dPriv->driContextPriv->driverPrivate) {
 878         struct via_context *vmesa =
 879            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 880         GLcontext *ctx = vmesa->glCtx;
 881
 882         _mesa_notifySwapBuffers(ctx);
 883
 884         if (ctx->Visual.doubleBufferMode) {
 885             if (vmesa->doPageFlip) {
 886                 viaPageFlip(dPriv);
 887             }
 888             else {
 889                 viaCopyBuffer(dPriv);
 890             }
 891         }
 892         else
 893             VIA_FLUSH_DMA(vmesa);
 894     }
 895     else {
 896         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 897     }
 898 }