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 "vbo/vbo.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_ARB_vertex_buffer_object
  68 #define need_GL_EXT_fog_coord
  69 #define need_GL_EXT_secondary_color
  70 #include "extension_helper.h"
  71
  72 #define DRIVER_DATE     "20060710"
  73
  74 #include "vblank.h"
  75 #include "utils.h"
  76
  77 GLuint VIA_DEBUG = 0;
  78
  79 /**
  80  * Return various strings for \c glGetString.
  81  *
  82  * \sa glGetString
  83  */
  84 static const GLubyte *viaGetString(GLcontext *ctx, GLenum name)
  85 {
  86    static char buffer[128];
  87    unsigned   offset;
  88
  89
  90    switch (name) {
  91    case GL_VENDOR:
  92       return (GLubyte *)"VIA Technology";
  93
  94    case GL_RENDERER: {
  95       static const char * const chipset_names[] = {
  96          "UniChrome",
  97          "CastleRock (CLE266)",
  98          "UniChrome (KM400)",
  99          "UniChrome (K8M800)",
 100          "UniChrome (PM8x0/CN400)",
 101       };
 102       struct via_context *vmesa = VIA_CONTEXT(ctx);
 103       unsigned id = vmesa->viaScreen->deviceID;
 104
 105       offset = driGetRendererString( buffer,
 106                                      chipset_names[(id > VIA_PM800) ? 0 : id],
 107                                      DRIVER_DATE, 0 );
 108       return (GLubyte *)buffer;
 109    }
 110
 111    default:
 112       return NULL;
 113    }
 114 }
 115
 116
 117 /**
 118  * Calculate a width that satisfies the hardware's alignment requirements.
 119  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 120  * 16 pixels.
 121  *
 122  * \param width  Minimum buffer width, in pixels.
 123  *
 124  * \returns A pixel width that meets the alignment requirements.
 125  */
 126 static __inline__ unsigned
 127 buffer_align( unsigned width )
 128 {
 129     return (width + 0x0f) & ~0x0f;
 130 }
 131
 132
 133 static void
 134 viaDeleteRenderbuffer(struct gl_renderbuffer *rb)
 135 {
 136    /* Don't free() since we're contained in via_context struct. */
 137 }
 138
 139 static GLboolean
 140 viaRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb,
 141                        GLenum internalFormat, GLuint width, GLuint height)
 142 {
 143    rb->Width = width;
 144    rb->Height = height;
 145    rb->InternalFormat = internalFormat;
 146    return GL_TRUE;
 147 }
 148
 149
 150 static void
 151 viaInitRenderbuffer(struct via_renderbuffer *vrb, GLenum format,
 152                     __DRIdrawablePrivate *dPriv)
 153 {
 154    const GLuint name = 0;
 155    struct gl_renderbuffer *rb = & vrb->Base;
 156
 157    vrb->dPriv = dPriv;
 158    _mesa_init_renderbuffer(rb, name);
 159
 160    /* Make sure we're using a null-valued GetPointer routine */
 161    assert(rb->GetPointer(NULL, rb, 0, 0) == NULL);
 162
 163    rb->InternalFormat = format;
 164
 165    if (format == GL_RGBA) {
 166       /* Color */
 167       rb->_BaseFormat = GL_RGBA;
 168       rb->DataType = GL_UNSIGNED_BYTE;
 169    }
 170    else if (format == GL_DEPTH_COMPONENT16) {
 171       /* Depth */
 172       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 173       /* we always Get/Put 32-bit Z values */
 174       rb->DataType = GL_UNSIGNED_INT;
 175    }
 176    else if (format == GL_DEPTH_COMPONENT24) {
 177       /* Depth */
 178       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 179       /* we always Get/Put 32-bit Z values */
 180       rb->DataType = GL_UNSIGNED_INT;
 181    }
 182    else {
 183       /* Stencil */
 184       ASSERT(format == GL_STENCIL_INDEX8_EXT);
 185       rb->_BaseFormat = GL_STENCIL_INDEX;
 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                             __DRIdrawablePrivate *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(GLcontext *ctx, GLframebuffer *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 const struct dri_extension card_extensions[] =
 368 {
 369     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 370     { "GL_ARB_multitexture",               NULL },
 371     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 372     { "GL_ARB_texture_env_add",            NULL },
 373     { "GL_ARB_texture_env_combine",        NULL },
 374 /*    { "GL_ARB_texture_env_dot3",           NULL }, */
 375     { "GL_ARB_texture_mirrored_repeat",    NULL },
 376     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 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, "unichrome");
 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     if (driQueryOptionb(&vmesa->optionCache, "excess_mipmap"))
 560         ctx->Const.MaxTextureLevels = 11;
 561     else
 562         ctx->Const.MaxTextureLevels = 10;
 563
 564     ctx->Const.MaxTextureUnits = 2;
 565     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 566     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 567
 568     ctx->Const.MinLineWidth = 1.0;
 569     ctx->Const.MinLineWidthAA = 1.0;
 570     ctx->Const.MaxLineWidth = 1.0;
 571     ctx->Const.MaxLineWidthAA = 1.0;
 572     ctx->Const.LineWidthGranularity = 1.0;
 573
 574     ctx->Const.MinPointSize = 1.0;
 575     ctx->Const.MinPointSizeAA = 1.0;
 576     ctx->Const.MaxPointSize = 1.0;
 577     ctx->Const.MaxPointSizeAA = 1.0;
 578     ctx->Const.PointSizeGranularity = 1.0;
 579
 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     _vbo_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->hHWContext = driContextPriv->hHWContext;
 605     vmesa->driFd = sPriv->fd;
 606     vmesa->driHwLock = &sPriv->pSAREA->lock;
 607
 608     vmesa->viaScreen = viaScreen;
 609     vmesa->driScreen = sPriv;
 610     vmesa->sarea = saPriv;
 611
 612     vmesa->renderIndex = ~0;
 613     vmesa->setupIndex = ~0;
 614     vmesa->hwPrimitive = GL_POLYGON+1;
 615
 616     /* KW: Hardwire this.  Was previously set bogusly in
 617      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 618      */
 619     vmesa->drawType = GLX_WINDOW_BIT;
 620
 621
 622     _math_matrix_ctr(&vmesa->ViewportMatrix);
 623
 624     /* Do this early, before VIA_FLUSH_DMA can be called:
 625      */
 626     if (!AllocateDmaBuffer(vmesa)) {
 627         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 628         FreeBuffer(vmesa);
 629         FREE(vmesa);
 630         return GL_FALSE;
 631     }
 632
 633     /* Allocate a small piece of fb memory for synchronization:
 634      */
 635     vmesa->breadcrumb.bpp = 32;
 636     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 637     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 638
 639     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 640         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 641         FreeBuffer(vmesa);
 642         FREE(vmesa);
 643         return GL_FALSE;
 644     }
 645
 646     driInitExtensions( ctx, card_extensions, GL_TRUE );
 647     viaInitStateFuncs(ctx);
 648     viaInitTriFuncs(ctx);
 649     viaInitSpanFuncs(ctx);
 650     viaInitIoctlFuncs(ctx);
 651     viaInitState(ctx);
 652
 653     if (getenv("VIA_DEBUG"))
 654        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 655                                         debug_control );
 656
 657     if (getenv("VIA_NO_RAST") ||
 658         driQueryOptionb(&vmesa->optionCache, "no_rast"))
 659        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 660
 661     if (getenv("VIA_PAGEFLIP"))
 662        vmesa->allowPageFlip = 1;
 663
 664     (*sPriv->systemTime->getUST)( &vmesa->swap_ust );
 665
 666
 667     vmesa->regMMIOBase = (GLuint *)((unsigned long)viaScreen->reg);
 668     vmesa->pnGEMode = (GLuint *)((unsigned long)viaScreen->reg + 0x4);
 669     vmesa->regEngineStatus = (GLuint *)((unsigned long)viaScreen->reg + 0x400);
 670     vmesa->regTranSet = (GLuint *)((unsigned long)viaScreen->reg + 0x43C);
 671     vmesa->regTranSpace = (GLuint *)((unsigned long)viaScreen->reg + 0x440);
 672     vmesa->agpBase = viaScreen->agpBase;
 673
 674
 675     return GL_TRUE;
 676 }
 677
 678 void
 679 viaDestroyContext(__DRIcontextPrivate *driContextPriv)
 680 {
 681     GET_CURRENT_CONTEXT(ctx);
 682     struct via_context *vmesa =
 683        (struct via_context *)driContextPriv->driverPrivate;
 684     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 685     assert(vmesa); /* should never be null */
 686
 687     /* check if we're deleting the currently bound context */
 688     if (vmesa == current) {
 689       VIA_FLUSH_DMA(vmesa);
 690       _mesa_make_current(NULL, NULL, NULL);
 691     }
 692
 693     if (vmesa) {
 694         viaWaitIdle(vmesa, GL_FALSE);
 695         if (vmesa->doPageFlip) {
 696            LOCK_HARDWARE(vmesa);
 697            if (vmesa->pfCurrentOffset != 0) {
 698               fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 699               viaResetPageFlippingLocked(vmesa);
 700            }
 701            UNLOCK_HARDWARE(vmesa);
 702         }
 703
 704         _swsetup_DestroyContext(vmesa->glCtx);
 705         _tnl_DestroyContext(vmesa->glCtx);
 706         _vbo_DestroyContext(vmesa->glCtx);
 707         _swrast_DestroyContext(vmesa->glCtx);
 708         /* free the Mesa context */
 709         _mesa_destroy_context(vmesa->glCtx);
 710         /* release our data */
 711         FreeBuffer(vmesa);
 712
 713         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 714         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 715         assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 716         assert (is_empty_list(&vmesa->freed_tex_buffers));
 717
 718         driDestroyOptionCache(&vmesa->optionCache);
 719
 720         FREE(vmesa);
 721     }
 722 }
 723
 724
 725 void viaXMesaWindowMoved(struct via_context *vmesa)
 726 {
 727    __DRIdrawablePrivate *const drawable = vmesa->driDrawable;
 728    __DRIdrawablePrivate *const readable = vmesa->driReadable;
 729    struct via_renderbuffer * draw_buffer;
 730    struct via_renderbuffer * read_buffer;
 731    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 732
 733    if (!drawable)
 734       return;
 735
 736    draw_buffer =  (struct via_renderbuffer *) drawable->driverPrivate;
 737    read_buffer =  (struct via_renderbuffer *) readable->driverPrivate;
 738
 739    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0]) {
 740    case BUFFER_BACK_LEFT:
 741       if (drawable->numBackClipRects == 0) {
 742          vmesa->numClipRects = drawable->numClipRects;
 743          vmesa->pClipRects = drawable->pClipRects;
 744       }
 745       else {
 746          vmesa->numClipRects = drawable->numBackClipRects;
 747          vmesa->pClipRects = drawable->pBackClipRects;
 748       }
 749       break;
 750    case BUFFER_FRONT_LEFT:
 751       vmesa->numClipRects = drawable->numClipRects;
 752       vmesa->pClipRects = drawable->pClipRects;
 753       break;
 754    default:
 755       vmesa->numClipRects = 0;
 756       break;
 757    }
 758
 759    if ((draw_buffer->drawW != drawable->w)
 760        || (draw_buffer->drawH != drawable->h)) {
 761       calculate_buffer_parameters(vmesa, vmesa->glCtx->DrawBuffer,
 762                                   drawable);
 763    }
 764
 765    draw_buffer->drawX = drawable->x;
 766    draw_buffer->drawY = drawable->y;
 767    draw_buffer->drawW = drawable->w;
 768    draw_buffer->drawH = drawable->h;
 769
 770    if (drawable != readable) {
 771       if ((read_buffer->drawW != readable->w)
 772           || (read_buffer->drawH != readable->h)) {
 773          calculate_buffer_parameters(vmesa, vmesa->glCtx->ReadBuffer,
 774                                      readable);
 775       }
 776
 777       read_buffer->drawX = readable->x;
 778       read_buffer->drawY = readable->y;
 779       read_buffer->drawW = readable->w;
 780       read_buffer->drawH = readable->h;
 781    }
 782
 783    vmesa->front.orig = (vmesa->front.offset +
 784                         draw_buffer->drawY * vmesa->front.pitch +
 785                         draw_buffer->drawX * bytePerPixel);
 786
 787    vmesa->front.origMap = (vmesa->front.map +
 788                         draw_buffer->drawY * vmesa->front.pitch +
 789                         draw_buffer->drawX * bytePerPixel);
 790
 791    vmesa->back.orig = (vmesa->back.offset +
 792                         draw_buffer->drawY * vmesa->back.pitch +
 793                         draw_buffer->drawX * bytePerPixel);
 794
 795    vmesa->back.origMap = (vmesa->back.map +
 796                         draw_buffer->drawY * vmesa->back.pitch +
 797                         draw_buffer->drawX * bytePerPixel);
 798
 799    vmesa->depth.orig = (vmesa->depth.offset +
 800                         draw_buffer->drawY * vmesa->depth.pitch +
 801                         draw_buffer->drawX * bytePerPixel);
 802
 803    vmesa->depth.origMap = (vmesa->depth.map +
 804                         draw_buffer->drawY * vmesa->depth.pitch +
 805                         draw_buffer->drawX * bytePerPixel);
 806
 807    viaCalcViewport(vmesa->glCtx);
 808 }
 809
 810 GLboolean
 811 viaUnbindContext(__DRIcontextPrivate *driContextPriv)
 812 {
 813     return GL_TRUE;
 814 }
 815
 816 GLboolean
 817 viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 818                __DRIdrawablePrivate *driDrawPriv,
 819                __DRIdrawablePrivate *driReadPriv)
 820 {
 821     if (VIA_DEBUG & DEBUG_DRI) {
 822         fprintf(stderr, "driContextPriv = %016lx\n", (unsigned long)driContextPriv);
 823         fprintf(stderr, "driDrawPriv = %016lx\n", (unsigned long)driDrawPriv);
 824         fprintf(stderr, "driReadPriv = %016lx\n", (unsigned long)driReadPriv);
 825     }
 826
 827     if (driContextPriv) {
 828         struct via_context *vmesa =
 829            (struct via_context *)driContextPriv->driverPrivate;
 830         GLcontext *ctx = vmesa->glCtx;
 831         struct gl_framebuffer *drawBuffer, *readBuffer;
 832
 833         drawBuffer = (GLframebuffer *)driDrawPriv->driverPrivate;
 834         readBuffer = (GLframebuffer *)driReadPriv->driverPrivate;
 835
 836        if ((vmesa->driDrawable != driDrawPriv)
 837            || (vmesa->driReadable != driReadPriv)) {
 838           if (driDrawPriv->swap_interval == (unsigned)-1) {
 839              driDrawPriv->vblFlags =
 840                 vmesa->viaScreen->irqEnabled ?
 841                 driGetDefaultVBlankFlags(&vmesa->optionCache) :
 842                 VBLANK_FLAG_NO_IRQ;
 843
 844              driDrawableInitVBlank(driDrawPriv);
 845           }
 846
 847           vmesa->driDrawable = driDrawPriv;
 848           vmesa->driReadable = driReadPriv;
 849
 850           if ((drawBuffer->Width != driDrawPriv->w)
 851               || (drawBuffer->Height != driDrawPriv->h)) {
 852              _mesa_resize_framebuffer(ctx, drawBuffer,
 853                                       driDrawPriv->w, driDrawPriv->h);
 854              drawBuffer->Initialized = GL_TRUE;
 855           }
 856
 857           if (!calculate_buffer_parameters(vmesa, drawBuffer, driDrawPriv)) {
 858              return GL_FALSE;
 859           }
 860
 861           if (driDrawPriv != driReadPriv) {
 862              if ((readBuffer->Width != driReadPriv->w)
 863                  || (readBuffer->Height != driReadPriv->h)) {
 864                 _mesa_resize_framebuffer(ctx, readBuffer,
 865                                          driReadPriv->w, driReadPriv->h);
 866                 readBuffer->Initialized = GL_TRUE;
 867              }
 868
 869              if (!calculate_buffer_parameters(vmesa, readBuffer, driReadPriv)) {
 870                 return GL_FALSE;
 871              }
 872           }
 873        }
 874
 875         _mesa_make_current(vmesa->glCtx, drawBuffer, readBuffer);
 876
 877         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 878
 879         viaXMesaWindowMoved(vmesa);
 880         ctx->Driver.Scissor(vmesa->glCtx,
 881                             vmesa->glCtx->Scissor.X,
 882                             vmesa->glCtx->Scissor.Y,
 883                             vmesa->glCtx->Scissor.Width,
 884                             vmesa->glCtx->Scissor.Height);
 885     }
 886     else {
 887         _mesa_make_current(NULL, NULL, NULL);
 888     }
 889
 890     return GL_TRUE;
 891 }
 892
 893 void viaGetLock(struct via_context *vmesa, GLuint flags)
 894 {
 895     __DRIdrawablePrivate *dPriv = vmesa->driDrawable;
 896     __DRIscreenPrivate *sPriv = vmesa->driScreen;
 897
 898     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 899
 900     DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 901     if (dPriv != vmesa->driReadable) {
 902         DRI_VALIDATE_DRAWABLE_INFO(sPriv, vmesa->driReadable);
 903     }
 904
 905     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 906        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 907        vmesa->newEmitState = ~0;
 908     }
 909
 910     if (vmesa->lastStamp != dPriv->lastStamp) {
 911        viaXMesaWindowMoved(vmesa);
 912        driUpdateFramebufferSize(vmesa->glCtx, dPriv);
 913        vmesa->newEmitState = ~0;
 914        vmesa->lastStamp = dPriv->lastStamp;
 915     }
 916
 917     if (vmesa->doPageFlip &&
 918         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 919        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 920        viaResetPageFlippingLocked(vmesa);
 921     }
 922 }
 923
 924
 925 void
 926 viaSwapBuffers(__DRIdrawablePrivate *drawablePrivate)
 927 {
 928     __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *)drawablePrivate;
 929
 930     if (dPriv &&
 931         dPriv->driContextPriv &&
 932         dPriv->driContextPriv->driverPrivate) {
 933         struct via_context *vmesa =
 934            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 935         GLcontext *ctx = vmesa->glCtx;
 936
 937         _mesa_notifySwapBuffers(ctx);
 938
 939         if (ctx->Visual.doubleBufferMode) {
 940             if (vmesa->doPageFlip) {
 941                 viaPageFlip(dPriv);
 942             }
 943             else {
 944                 viaCopyBuffer(dPriv);
 945             }
 946         }
 947         else
 948             VIA_FLUSH_DMA(vmesa);
 949     }
 950     else {
 951         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 952     }
 953 }