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 "main/glheader.h"
  34 #include "main/context.h"
  35 #include "main/formats.h"
  36 #include "main/simple_list.h"
  37 #include "main/framebuffer.h"
  38 #include "main/renderbuffer.h"
  39
  40 #include "swrast/swrast.h"
  41 #include "swrast_setup/swrast_setup.h"
  42 #include "tnl/tnl.h"
  43 #include "vbo/vbo.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 "main/macros.h"
  61 #include "drirenderbuffer.h"
  62
  63 #define need_GL_ARB_point_parameters
  64 #define need_GL_EXT_fog_coord
  65 #define need_GL_EXT_secondary_color
  66 #include "main/remap_helper.h"
  67
  68 #define DRIVER_DATE     "20060710"
  69
  70 #include "vblank.h"
  71 #include "utils.h"
  72
  73 GLuint VIA_DEBUG = 0;
  74
  75 /**
  76  * Return various strings for \c glGetString.
  77  *
  78  * \sa glGetString
  79  */
  80 static const GLubyte *viaGetString(struct gl_context *ctx, GLenum name)
  81 {
  82    static char buffer[128];
  83    unsigned   offset;
  84
  85
  86    switch (name) {
  87    case GL_VENDOR:
  88       return (GLubyte *)"VIA Technology";
  89
  90    case GL_RENDERER: {
  91       static const char * const chipset_names[] = {
  92          "UniChrome",
  93          "CastleRock (CLE266)",
  94          "UniChrome (KM400)",
  95          "UniChrome (K8M800)",
  96          "UniChrome (PM8x0/CN400)",
  97       };
  98       struct via_context *vmesa = VIA_CONTEXT(ctx);
  99       unsigned id = vmesa->viaScreen->deviceID;
 100
 101       offset = driGetRendererString( buffer,
 102                                      chipset_names[(id > VIA_PM800) ? 0 : id],
 103                                      DRIVER_DATE, 0 );
 104       return (GLubyte *)buffer;
 105    }
 106
 107    default:
 108       return NULL;
 109    }
 110 }
 111
 112
 113 /**
 114  * Calculate a width that satisfies the hardware's alignment requirements.
 115  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 116  * 16 pixels.
 117  *
 118  * \param width  Minimum buffer width, in pixels.
 119  *
 120  * \returns A pixel width that meets the alignment requirements.
 121  */
 122 static INLINE unsigned
 123 buffer_align( unsigned width )
 124 {
 125     return (width + 0x0f) & ~0x0f;
 126 }
 127
 128
 129 static void
 130 viaDeleteRenderbuffer(struct gl_renderbuffer *rb)
 131 {
 132    /* Don't free() since we're contained in via_context struct. */
 133 }
 134
 135 static GLboolean
 136 viaRenderbufferStorage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 137                        GLenum internalFormat, GLuint width, GLuint height)
 138 {
 139    rb->Width = width;
 140    rb->Height = height;
 141    rb->InternalFormat = internalFormat;
 142    return GL_TRUE;
 143 }
 144
 145
 146 static void
 147 viaInitRenderbuffer(struct via_renderbuffer *vrb, GLenum format,
 148                     __DRIdrawable *dPriv)
 149 {
 150    const GLuint name = 0;
 151    struct gl_renderbuffer *rb = & vrb->Base;
 152
 153    vrb->dPriv = dPriv;
 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->Format = MESA_FORMAT_ARGB8888;
 165       rb->DataType = GL_UNSIGNED_BYTE;
 166    }
 167    else if (format == GL_DEPTH_COMPONENT16) {
 168       /* Depth */
 169       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 170       /* we always Get/Put 32-bit Z values */
 171       rb->Format = MESA_FORMAT_Z16;
 172       rb->DataType = GL_UNSIGNED_INT;
 173    }
 174    else if (format == GL_DEPTH_COMPONENT24) {
 175       /* Depth */
 176       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 177       /* we always Get/Put 32-bit Z values */
 178       rb->Format = MESA_FORMAT_Z32;
 179       rb->DataType = GL_UNSIGNED_INT;
 180    }
 181    else {
 182       /* Stencil */
 183       ASSERT(format == GL_STENCIL_INDEX8_EXT);
 184       rb->_BaseFormat = GL_STENCIL_INDEX;
 185       rb->Format = MESA_FORMAT_S8;
 186       rb->DataType = GL_UNSIGNED_BYTE;
 187    }
 188
 189    rb->Delete = viaDeleteRenderbuffer;
 190    rb->AllocStorage = viaRenderbufferStorage;
 191 }
 192
 193
 194 /**
 195  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 196  * and stencil) associated with the specified context.
 197  *
 198  * \warning
 199  * This function also calls \c AllocateBuffer to actually allocate the
 200  * buffers.
 201  *
 202  * \sa AllocateBuffer
 203  */
 204 static GLboolean
 205 calculate_buffer_parameters(struct via_context *vmesa,
 206                             struct gl_framebuffer *fb,
 207                             __DRIdrawable *dPriv)
 208 {
 209    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 210    const unsigned extra = 32;
 211    unsigned w;
 212    unsigned h;
 213
 214    /* Normally, the renderbuffer would be added to the framebuffer just once
 215     * when the framebuffer was created.  The VIA driver is a bit funny
 216     * though in that the front/back/depth renderbuffers are in the per-context
 217     * state!
 218     * That should be fixed someday.
 219     */
 220
 221    if (!vmesa->front.Base.InternalFormat) {
 222       /* do one-time init for the renderbuffers */
 223       viaInitRenderbuffer(&vmesa->front, GL_RGBA, dPriv);
 224       viaSetSpanFunctions(&vmesa->front, &fb->Visual);
 225       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &vmesa->front.Base);
 226
 227       if (fb->Visual.doubleBufferMode) {
 228          viaInitRenderbuffer(&vmesa->back, GL_RGBA, dPriv);
 229          viaSetSpanFunctions(&vmesa->back, &fb->Visual);
 230          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &vmesa->back.Base);
 231       }
 232
 233       if (vmesa->glCtx->Visual.depthBits > 0) {
 234          viaInitRenderbuffer(&vmesa->depth,
 235                              (vmesa->glCtx->Visual.depthBits == 16
 236                               ? GL_DEPTH_COMPONENT16 : GL_DEPTH_COMPONENT24),
 237                              dPriv);
 238          viaSetSpanFunctions(&vmesa->depth, &fb->Visual);
 239          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &vmesa->depth.Base);
 240       }
 241
 242       if (vmesa->glCtx->Visual.stencilBits > 0) {
 243          viaInitRenderbuffer(&vmesa->stencil, GL_STENCIL_INDEX8_EXT,
 244                              dPriv);
 245          viaSetSpanFunctions(&vmesa->stencil, &fb->Visual);
 246          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &vmesa->stencil.Base);
 247       }
 248    }
 249
 250    assert(vmesa->front.Base.InternalFormat);
 251    assert(vmesa->front.Base.AllocStorage);
 252    if (fb->Visual.doubleBufferMode) {
 253       assert(vmesa->back.Base.AllocStorage);
 254    }
 255    if (fb->Visual.depthBits) {
 256       assert(vmesa->depth.Base.AllocStorage);
 257    }
 258
 259
 260    /* Allocate front-buffer */
 261    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 262       w = vmesa->driDrawable->w;
 263       h = vmesa->driDrawable->h;
 264
 265       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 266       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 267       vmesa->front.size = vmesa->front.pitch * h;
 268
 269       if (vmesa->front.map)
 270          via_free_draw_buffer(vmesa, &vmesa->front);
 271       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 272          return GL_FALSE;
 273
 274    } else {
 275       w = vmesa->viaScreen->width;
 276       h = vmesa->viaScreen->height;
 277
 278       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 279       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 280       vmesa->front.size = vmesa->front.pitch * h;
 281       if (getenv("ALTERNATE_SCREEN"))
 282         vmesa->front.offset = vmesa->front.size;
 283       else
 284         vmesa->front.offset = 0;
 285       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 286    }
 287
 288
 289    /* Allocate back-buffer */
 290    if (vmesa->hasBack) {
 291       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 292       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift);
 293       vmesa->back.pitch += extra;
 294       vmesa->back.pitch = MIN2(vmesa->back.pitch, vmesa->front.pitch);
 295       vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 296       if (vmesa->back.map)
 297          via_free_draw_buffer(vmesa, &vmesa->back);
 298       if (!via_alloc_draw_buffer(vmesa, &vmesa->back))
 299          return GL_FALSE;
 300    }
 301    else {
 302       if (vmesa->back.map)
 303          via_free_draw_buffer(vmesa, &vmesa->back);
 304       (void) memset( &vmesa->back, 0, sizeof( vmesa->back ) );
 305    }
 306
 307
 308    /* Allocate depth-buffer */
 309    if ( vmesa->hasStencil || vmesa->hasDepth ) {
 310       vmesa->depth.bpp = vmesa->depthBits;
 311       if (vmesa->depth.bpp == 24)
 312          vmesa->depth.bpp = 32;
 313
 314       vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) *
 315                             (vmesa->depth.bpp/8)) + extra;
 316       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 317
 318       if (vmesa->depth.map)
 319          via_free_draw_buffer(vmesa, &vmesa->depth);
 320       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 321          return GL_FALSE;
 322       }
 323    }
 324    else {
 325       if (vmesa->depth.map)
 326          via_free_draw_buffer(vmesa, &vmesa->depth);
 327       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 328    }
 329
 330    /* stencil buffer is same as depth buffer */
 331    vmesa->stencil.handle = vmesa->depth.handle;
 332    vmesa->stencil.size = vmesa->depth.size;
 333    vmesa->stencil.offset = vmesa->depth.offset;
 334    vmesa->stencil.index = vmesa->depth.index;
 335    vmesa->stencil.pitch = vmesa->depth.pitch;
 336    vmesa->stencil.bpp = vmesa->depth.bpp;
 337    vmesa->stencil.map = vmesa->depth.map;
 338    vmesa->stencil.orig = vmesa->depth.orig;
 339    vmesa->stencil.origMap = vmesa->depth.origMap;
 340
 341    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 342        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 343       vmesa->doPageFlip = vmesa->allowPageFlip;
 344       if (vmesa->hasBack) {
 345          assert(vmesa->back.pitch == vmesa->front.pitch);
 346       }
 347    }
 348    else
 349       vmesa->doPageFlip = GL_FALSE;
 350
 351    return GL_TRUE;
 352 }
 353
 354
 355 void viaReAllocateBuffers(struct gl_context *ctx, struct gl_framebuffer *drawbuffer,
 356                           GLuint width, GLuint height)
 357 {
 358     struct via_context *vmesa = VIA_CONTEXT(ctx);
 359
 360     calculate_buffer_parameters(vmesa, drawbuffer, vmesa->driDrawable);
 361
 362     _mesa_resize_framebuffer(ctx, drawbuffer, width, height);
 363 }
 364
 365 /* Extension strings exported by the Unichrome driver.
 366  */
 367 static const struct dri_extension card_extensions[] =
 368 {
 369     { "GL_ARB_multitexture",               NULL },
 370     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 371     { "GL_ARB_texture_env_add",            NULL },
 372     { "GL_ARB_texture_env_combine",        NULL },
 373 /*    { "GL_ARB_texture_env_dot3",           NULL }, */
 374     { "GL_ARB_texture_mirrored_repeat",    NULL },
 375     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 376     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 377     { "GL_EXT_stencil_wrap",               NULL },
 378     { "GL_EXT_texture_env_combine",        NULL },
 379 /*    { "GL_EXT_texture_env_dot3",           NULL }, */
 380     { "GL_EXT_texture_lod_bias",           NULL },
 381     { "GL_NV_blend_square",                NULL },
 382     { NULL,                                NULL }
 383 };
 384
 385 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 386 extern const struct tnl_pipeline_stage _via_render_stage;
 387
 388 static const struct tnl_pipeline_stage *via_pipeline[] = {
 389     &_tnl_vertex_transform_stage,
 390     &_tnl_normal_transform_stage,
 391     &_tnl_lighting_stage,
 392     &_tnl_fog_coordinate_stage,
 393     &_tnl_texgen_stage,
 394     &_tnl_texture_transform_stage,
 395     /* REMOVE: point attenuation stage */
 396 #if 1
 397     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 398 #endif
 399     &_tnl_render_stage,
 400     0,
 401 };
 402
 403
 404 static const struct dri_debug_control debug_control[] =
 405 {
 406     { "fall",  DEBUG_FALLBACKS },
 407     { "tex",   DEBUG_TEXTURE },
 408     { "ioctl", DEBUG_IOCTL },
 409     { "prim",  DEBUG_PRIMS },
 410     { "vert",  DEBUG_VERTS },
 411     { "state", DEBUG_STATE },
 412     { "verb",  DEBUG_VERBOSE },
 413     { "dri",   DEBUG_DRI },
 414     { "dma",   DEBUG_DMA },
 415     { "san",   DEBUG_SANITY },
 416     { "sync",  DEBUG_SYNC },
 417     { "sleep", DEBUG_SLEEP },
 418     { "pix",   DEBUG_PIXEL },
 419     { "2d",    DEBUG_2D },
 420     { NULL,    0 }
 421 };
 422
 423
 424 static GLboolean
 425 AllocateDmaBuffer(struct via_context *vmesa)
 426 {
 427     if (vmesa->dma)
 428         via_free_dma_buffer(vmesa);
 429
 430     if (!via_alloc_dma_buffer(vmesa))
 431         return GL_FALSE;
 432
 433     vmesa->dmaLow = 0;
 434     vmesa->dmaCliprectAddr = ~0;
 435     return GL_TRUE;
 436 }
 437
 438 static void
 439 FreeBuffer(struct via_context *vmesa)
 440 {
 441     if (vmesa->front.map && vmesa->drawType == GLX_PBUFFER_BIT)
 442         via_free_draw_buffer(vmesa, &vmesa->front);
 443
 444     if (vmesa->back.map)
 445         via_free_draw_buffer(vmesa, &vmesa->back);
 446
 447     if (vmesa->depth.map)
 448         via_free_draw_buffer(vmesa, &vmesa->depth);
 449
 450     if (vmesa->breadcrumb.map)
 451         via_free_draw_buffer(vmesa, &vmesa->breadcrumb);
 452
 453     if (vmesa->dma)
 454         via_free_dma_buffer(vmesa);
 455 }
 456
 457
 458 GLboolean
 459 viaCreateContext(gl_api api,
 460                  const struct gl_config *visual,
 461                  __DRIcontext *driContextPriv,
 462                  void *sharedContextPrivate)
 463 {
 464     struct gl_context *ctx, *shareCtx;
 465     struct via_context *vmesa;
 466     __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 467     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 468     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 469         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 470     struct dd_function_table functions;
 471
 472     /* Allocate via context */
 473     vmesa = (struct via_context *) CALLOC_STRUCT(via_context);
 474     if (!vmesa) {
 475         return GL_FALSE;
 476     }
 477
 478     /* Parse configuration files.
 479      */
 480     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 481                          sPriv->myNum, "unichrome");
 482
 483     /* pick back buffer */
 484     vmesa->hasBack = visual->doubleBufferMode;
 485
 486     switch(visual->depthBits) {
 487     case 0:
 488        vmesa->hasDepth = GL_FALSE;
 489        vmesa->depthBits = 0;
 490        vmesa->depth_max = 1.0;
 491        break;
 492     case 16:
 493        vmesa->hasDepth = GL_TRUE;
 494        vmesa->depthBits = visual->depthBits;
 495        vmesa->have_hw_stencil = GL_FALSE;
 496        vmesa->depth_max = (GLfloat)0xffff;
 497        vmesa->depth_clear_mask = 0xf << 28;
 498        vmesa->ClearDepth = 0xffff;
 499        vmesa->polygon_offset_scale = 1.0 / vmesa->depth_max;
 500        break;
 501     case 24:
 502        vmesa->hasDepth = GL_TRUE;
 503        vmesa->depthBits = visual->depthBits;
 504        vmesa->depth_max = (GLfloat) 0xffffff;
 505        vmesa->depth_clear_mask = 0xe << 28;
 506        vmesa->ClearDepth = 0xffffff00;
 507
 508        assert(visual->haveStencilBuffer);
 509        assert(visual->stencilBits == 8);
 510
 511        vmesa->have_hw_stencil = GL_TRUE;
 512        vmesa->stencilBits = visual->stencilBits;
 513        vmesa->stencil_clear_mask = 0x1 << 28;
 514        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 515        break;
 516     case 32:
 517        vmesa->hasDepth = GL_TRUE;
 518        vmesa->depthBits = visual->depthBits;
 519        assert(!visual->haveStencilBuffer);
 520        vmesa->have_hw_stencil = GL_FALSE;
 521        vmesa->depth_max = (GLfloat)0xffffffff;
 522        vmesa->depth_clear_mask = 0xf << 28;
 523        vmesa->ClearDepth = 0xffffffff;
 524        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 525        break;
 526     default:
 527        assert(0);
 528        break;
 529     }
 530
 531     make_empty_list(&vmesa->freed_tex_buffers);
 532     make_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]);
 533     make_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]);
 534     make_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]);
 535
 536     _mesa_init_driver_functions(&functions);
 537     viaInitTextureFuncs(&functions);
 538
 539     /* Allocate the Mesa context */
 540     if (sharedContextPrivate)
 541         shareCtx = ((struct via_context *) sharedContextPrivate)->glCtx;
 542     else
 543         shareCtx = NULL;
 544
 545     vmesa->glCtx = _mesa_create_context(visual, shareCtx, &functions,
 546                                         (void*) vmesa);
 547
 548     vmesa->shareCtx = shareCtx;
 549
 550     if (!vmesa->glCtx) {
 551         FREE(vmesa);
 552         return GL_FALSE;
 553     }
 554     driContextPriv->driverPrivate = vmesa;
 555
 556     ctx = vmesa->glCtx;
 557
 558     if (driQueryOptionb(&vmesa->optionCache, "excess_mipmap"))
 559         ctx->Const.MaxTextureLevels = 11;
 560     else
 561         ctx->Const.MaxTextureLevels = 10;
 562
 563     ctx->Const.MaxTextureUnits = 2;
 564     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 565     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 566
 567     ctx->Const.MinLineWidth = 1.0;
 568     ctx->Const.MinLineWidthAA = 1.0;
 569     ctx->Const.MaxLineWidth = 1.0;
 570     ctx->Const.MaxLineWidthAA = 1.0;
 571     ctx->Const.LineWidthGranularity = 1.0;
 572
 573     ctx->Const.MinPointSize = 1.0;
 574     ctx->Const.MinPointSizeAA = 1.0;
 575     ctx->Const.MaxPointSize = 1.0;
 576     ctx->Const.MaxPointSizeAA = 1.0;
 577     ctx->Const.PointSizeGranularity = 1.0;
 578
 579     ctx->Const.MaxDrawBuffers = 1;
 580
 581     ctx->Driver.GetString = viaGetString;
 582
 583     ctx->DriverCtx = (void *)vmesa;
 584     vmesa->glCtx = ctx;
 585
 586     /* Initialize the software rasterizer and helper modules.
 587      */
 588     _swrast_CreateContext(ctx);
 589     _vbo_CreateContext(ctx);
 590     _tnl_CreateContext(ctx);
 591     _swsetup_CreateContext(ctx);
 592
 593     /* Install the customized pipeline:
 594      */
 595     _tnl_destroy_pipeline(ctx);
 596     _tnl_install_pipeline(ctx, via_pipeline);
 597
 598     /* Configure swrast and T&L to match hardware characteristics:
 599      */
 600     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 601     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 602     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 603     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 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         driQueryOptionb(&vmesa->optionCache, "no_rast"))
 660        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 661
 662     if (getenv("VIA_PAGEFLIP"))
 663        vmesa->allowPageFlip = 1;
 664
 665     (*sPriv->systemTime->getUST)( &vmesa->swap_ust );
 666
 667
 668     vmesa->regMMIOBase = (GLuint *)((unsigned long)viaScreen->reg);
 669     vmesa->pnGEMode = (GLuint *)((unsigned long)viaScreen->reg + 0x4);
 670     vmesa->regEngineStatus = (GLuint *)((unsigned long)viaScreen->reg + 0x400);
 671     vmesa->regTranSet = (GLuint *)((unsigned long)viaScreen->reg + 0x43C);
 672     vmesa->regTranSpace = (GLuint *)((unsigned long)viaScreen->reg + 0x440);
 673     vmesa->agpBase = viaScreen->agpBase;
 674
 675
 676     return GL_TRUE;
 677 }
 678
 679 void
 680 viaDestroyContext(__DRIcontext *driContextPriv)
 681 {
 682     GET_CURRENT_CONTEXT(ctx);
 683     struct via_context *vmesa =
 684        (struct via_context *)driContextPriv->driverPrivate;
 685     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 686
 687     assert(vmesa); /* should never be null */
 688
 689     if (vmesa->driDrawable) {
 690        viaWaitIdle(vmesa, GL_FALSE);
 691
 692        if (vmesa->doPageFlip) {
 693           LOCK_HARDWARE(vmesa);
 694           if (vmesa->pfCurrentOffset != 0) {
 695              fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 696              viaResetPageFlippingLocked(vmesa);
 697           }
 698           UNLOCK_HARDWARE(vmesa);
 699        }
 700     }
 701
 702     /* check if we're deleting the currently bound context */
 703     if (vmesa == current) {
 704       VIA_FLUSH_DMA(vmesa);
 705       _mesa_make_current(NULL, NULL, NULL);
 706     }
 707
 708     _swsetup_DestroyContext(vmesa->glCtx);
 709     _tnl_DestroyContext(vmesa->glCtx);
 710     _vbo_DestroyContext(vmesa->glCtx);
 711     _swrast_DestroyContext(vmesa->glCtx);
 712     /* free the Mesa context */
 713     _mesa_destroy_context(vmesa->glCtx);
 714     /* release our data */
 715     FreeBuffer(vmesa);
 716
 717     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 718     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 719     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 720     assert (is_empty_list(&vmesa->freed_tex_buffers));
 721
 722     driDestroyOptionCache(&vmesa->optionCache);
 723
 724     FREE(vmesa);
 725 }
 726
 727
 728 void viaXMesaWindowMoved(struct via_context *vmesa)
 729 {
 730    __DRIdrawable *const drawable = vmesa->driDrawable;
 731    __DRIdrawable *const readable = vmesa->driReadable;
 732    struct via_renderbuffer * draw_buffer;
 733    struct via_renderbuffer * read_buffer;
 734    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 735
 736    if (!drawable)
 737       return;
 738
 739    draw_buffer =  (struct via_renderbuffer *) drawable->driverPrivate;
 740    read_buffer =  (struct via_renderbuffer *) readable->driverPrivate;
 741
 742    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0]) {
 743    case BUFFER_BACK_LEFT:
 744       if (drawable->numBackClipRects == 0) {
 745          vmesa->numClipRects = drawable->numClipRects;
 746          vmesa->pClipRects = drawable->pClipRects;
 747       }
 748       else {
 749          vmesa->numClipRects = drawable->numBackClipRects;
 750          vmesa->pClipRects = drawable->pBackClipRects;
 751       }
 752       break;
 753    case BUFFER_FRONT_LEFT:
 754       vmesa->numClipRects = drawable->numClipRects;
 755       vmesa->pClipRects = drawable->pClipRects;
 756       break;
 757    default:
 758       vmesa->numClipRects = 0;
 759       break;
 760    }
 761
 762    if ((draw_buffer->drawW != drawable->w)
 763        || (draw_buffer->drawH != drawable->h)) {
 764       calculate_buffer_parameters(vmesa, vmesa->glCtx->DrawBuffer,
 765                                   drawable);
 766    }
 767
 768    draw_buffer->drawX = drawable->x;
 769    draw_buffer->drawY = drawable->y;
 770    draw_buffer->drawW = drawable->w;
 771    draw_buffer->drawH = drawable->h;
 772
 773    if (drawable != readable) {
 774       if ((read_buffer->drawW != readable->w)
 775           || (read_buffer->drawH != readable->h)) {
 776          calculate_buffer_parameters(vmesa, vmesa->glCtx->ReadBuffer,
 777                                      readable);
 778       }
 779
 780       read_buffer->drawX = readable->x;
 781       read_buffer->drawY = readable->y;
 782       read_buffer->drawW = readable->w;
 783       read_buffer->drawH = readable->h;
 784    }
 785
 786    vmesa->front.orig = (vmesa->front.offset +
 787                         draw_buffer->drawY * vmesa->front.pitch +
 788                         draw_buffer->drawX * bytePerPixel);
 789
 790    vmesa->front.origMap = (vmesa->front.map +
 791                         draw_buffer->drawY * vmesa->front.pitch +
 792                         draw_buffer->drawX * bytePerPixel);
 793
 794    vmesa->back.orig = (vmesa->back.offset +
 795                         draw_buffer->drawY * vmesa->back.pitch +
 796                         draw_buffer->drawX * bytePerPixel);
 797
 798    vmesa->back.origMap = (vmesa->back.map +
 799                         draw_buffer->drawY * vmesa->back.pitch +
 800                         draw_buffer->drawX * bytePerPixel);
 801
 802    vmesa->depth.orig = (vmesa->depth.offset +
 803                         draw_buffer->drawY * vmesa->depth.pitch +
 804                         draw_buffer->drawX * bytePerPixel);
 805
 806    vmesa->depth.origMap = (vmesa->depth.map +
 807                         draw_buffer->drawY * vmesa->depth.pitch +
 808                         draw_buffer->drawX * bytePerPixel);
 809
 810    viaCalcViewport(vmesa->glCtx);
 811 }
 812
 813 GLboolean
 814 viaUnbindContext(__DRIcontext *driContextPriv)
 815 {
 816     return GL_TRUE;
 817 }
 818
 819 GLboolean
 820 viaMakeCurrent(__DRIcontext *driContextPriv,
 821                __DRIdrawable *driDrawPriv,
 822                __DRIdrawable *driReadPriv)
 823 {
 824     if (VIA_DEBUG & DEBUG_DRI) {
 825         fprintf(stderr, "driContextPriv = %016lx\n", (unsigned long)driContextPriv);
 826         fprintf(stderr, "driDrawPriv = %016lx\n", (unsigned long)driDrawPriv);
 827         fprintf(stderr, "driReadPriv = %016lx\n", (unsigned long)driReadPriv);
 828     }
 829
 830     if (driContextPriv) {
 831         struct via_context *vmesa =
 832            (struct via_context *)driContextPriv->driverPrivate;
 833         struct gl_context *ctx = vmesa->glCtx;
 834         struct gl_framebuffer *drawBuffer, *readBuffer;
 835
 836         drawBuffer = (struct gl_framebuffer *)driDrawPriv->driverPrivate;
 837         readBuffer = (struct gl_framebuffer *)driReadPriv->driverPrivate;
 838
 839        if ((vmesa->driDrawable != driDrawPriv)
 840            || (vmesa->driReadable != driReadPriv)) {
 841           if (driDrawPriv->swap_interval == (unsigned)-1) {
 842              driDrawPriv->vblFlags =
 843                 vmesa->viaScreen->irqEnabled ?
 844                 driGetDefaultVBlankFlags(&vmesa->optionCache) :
 845                 VBLANK_FLAG_NO_IRQ;
 846
 847              driDrawableInitVBlank(driDrawPriv);
 848           }
 849
 850           vmesa->driDrawable = driDrawPriv;
 851           vmesa->driReadable = driReadPriv;
 852
 853           if ((drawBuffer->Width != driDrawPriv->w)
 854               || (drawBuffer->Height != driDrawPriv->h)) {
 855              _mesa_resize_framebuffer(ctx, drawBuffer,
 856                                       driDrawPriv->w, driDrawPriv->h);
 857              drawBuffer->Initialized = GL_TRUE;
 858           }
 859
 860           if (!calculate_buffer_parameters(vmesa, drawBuffer, driDrawPriv)) {
 861              return GL_FALSE;
 862           }
 863
 864           if (driDrawPriv != driReadPriv) {
 865              if ((readBuffer->Width != driReadPriv->w)
 866                  || (readBuffer->Height != driReadPriv->h)) {
 867                 _mesa_resize_framebuffer(ctx, readBuffer,
 868                                          driReadPriv->w, driReadPriv->h);
 869                 readBuffer->Initialized = GL_TRUE;
 870              }
 871
 872              if (!calculate_buffer_parameters(vmesa, readBuffer, driReadPriv)) {
 873                 return GL_FALSE;
 874              }
 875           }
 876        }
 877
 878         _mesa_make_current(vmesa->glCtx, drawBuffer, readBuffer);
 879
 880         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 881
 882         viaXMesaWindowMoved(vmesa);
 883         ctx->Driver.Scissor(vmesa->glCtx,
 884                             vmesa->glCtx->Scissor.X,
 885                             vmesa->glCtx->Scissor.Y,
 886                             vmesa->glCtx->Scissor.Width,
 887                             vmesa->glCtx->Scissor.Height);
 888     }
 889     else {
 890         _mesa_make_current(NULL, NULL, NULL);
 891     }
 892
 893     return GL_TRUE;
 894 }
 895
 896 void viaGetLock(struct via_context *vmesa, GLuint flags)
 897 {
 898     __DRIdrawable *dPriv = vmesa->driDrawable;
 899     __DRIscreen *sPriv = vmesa->driScreen;
 900
 901     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 902
 903     DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 904     if (dPriv != vmesa->driReadable) {
 905         DRI_VALIDATE_DRAWABLE_INFO(sPriv, vmesa->driReadable);
 906     }
 907
 908     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 909        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 910        vmesa->newEmitState = ~0;
 911     }
 912
 913     if (vmesa->lastStamp != dPriv->lastStamp) {
 914        viaXMesaWindowMoved(vmesa);
 915        driUpdateFramebufferSize(vmesa->glCtx, dPriv);
 916        vmesa->newEmitState = ~0;
 917        vmesa->lastStamp = dPriv->lastStamp;
 918     }
 919
 920     if (vmesa->doPageFlip &&
 921         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 922        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 923        viaResetPageFlippingLocked(vmesa);
 924     }
 925 }
 926
 927
 928 void
 929 viaSwapBuffers(__DRIdrawable *drawablePrivate)
 930 {
 931     __DRIdrawable *dPriv = (__DRIdrawable *)drawablePrivate;
 932
 933     if (dPriv &&
 934         dPriv->driContextPriv &&
 935         dPriv->driContextPriv->driverPrivate) {
 936         struct via_context *vmesa =
 937            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 938         struct gl_context *ctx = vmesa->glCtx;
 939
 940         _mesa_notifySwapBuffers(ctx);
 941
 942         if (ctx->Visual.doubleBufferMode) {
 943             if (vmesa->doPageFlip) {
 944                 viaPageFlip(dPriv);
 945             }
 946             else {
 947                 viaCopyBuffer(dPriv);
 948             }
 949         }
 950         else
 951             VIA_FLUSH_DMA(vmesa);
 952     }
 953     else {
 954         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 955     }
 956 }