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 #include "vblank.h"
  69 #include "utils.h"
  70
  71 GLuint VIA_DEBUG = 0;
  72
  73 /**
  74  * Return various strings for \c glGetString.
  75  *
  76  * \sa glGetString
  77  */
  78 static const GLubyte *viaGetString(struct gl_context *ctx, GLenum name)
  79 {
  80    static char buffer[128];
  81    unsigned   offset;
  82
  83
  84    switch (name) {
  85    case GL_VENDOR:
  86       return (GLubyte *)"VIA Technology";
  87
  88    case GL_RENDERER: {
  89       static const char * const chipset_names[] = {
  90          "UniChrome",
  91          "CastleRock (CLE266)",
  92          "UniChrome (KM400)",
  93          "UniChrome (K8M800)",
  94          "UniChrome (PM8x0/CN400)",
  95       };
  96       struct via_context *vmesa = VIA_CONTEXT(ctx);
  97       unsigned id = vmesa->viaScreen->deviceID;
  98
  99       offset = driGetRendererString( buffer,
 100                                      chipset_names[(id > VIA_PM800) ? 0 : id],
 101                                      0 );
 102       return (GLubyte *)buffer;
 103    }
 104
 105    default:
 106       return NULL;
 107    }
 108 }
 109
 110
 111 /**
 112  * Calculate a width that satisfies the hardware's alignment requirements.
 113  * On the Unichrome hardware, each scanline must be aligned to a multiple of
 114  * 16 pixels.
 115  *
 116  * \param width  Minimum buffer width, in pixels.
 117  *
 118  * \returns A pixel width that meets the alignment requirements.
 119  */
 120 static INLINE unsigned
 121 buffer_align( unsigned width )
 122 {
 123     return (width + 0x0f) & ~0x0f;
 124 }
 125
 126
 127 static void
 128 viaDeleteRenderbuffer(struct gl_renderbuffer *rb)
 129 {
 130    /* Don't free() since we're contained in via_context struct. */
 131 }
 132
 133 static GLboolean
 134 viaRenderbufferStorage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 135                        GLenum internalFormat, GLuint width, GLuint height)
 136 {
 137    rb->Width = width;
 138    rb->Height = height;
 139    rb->InternalFormat = internalFormat;
 140    return GL_TRUE;
 141 }
 142
 143
 144 static void
 145 viaInitRenderbuffer(struct via_renderbuffer *vrb, GLenum format,
 146                     __DRIdrawable *dPriv)
 147 {
 148    const GLuint name = 0;
 149    struct gl_renderbuffer *rb = & vrb->Base;
 150
 151    vrb->dPriv = dPriv;
 152    _mesa_init_renderbuffer(rb, name);
 153
 154    /* Make sure we're using a null-valued GetPointer routine */
 155    assert(rb->GetPointer(NULL, rb, 0, 0) == NULL);
 156
 157    rb->InternalFormat = format;
 158
 159    if (format == GL_RGBA) {
 160       /* Color */
 161       rb->_BaseFormat = GL_RGBA;
 162       rb->Format = MESA_FORMAT_ARGB8888;
 163       rb->DataType = GL_UNSIGNED_BYTE;
 164    }
 165    else if (format == GL_DEPTH_COMPONENT16) {
 166       /* Depth */
 167       rb->_BaseFormat = GL_DEPTH_COMPONENT;
 168       /* we always Get/Put 32-bit Z values */
 169       rb->Format = MESA_FORMAT_Z16;
 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->Format = MESA_FORMAT_Z32;
 177       rb->DataType = GL_UNSIGNED_INT;
 178    }
 179    else {
 180       /* Stencil */
 181       ASSERT(format == GL_STENCIL_INDEX8_EXT);
 182       rb->_BaseFormat = GL_STENCIL_INDEX;
 183       rb->Format = MESA_FORMAT_S8;
 184       rb->DataType = GL_UNSIGNED_BYTE;
 185    }
 186
 187    rb->Delete = viaDeleteRenderbuffer;
 188    rb->AllocStorage = viaRenderbufferStorage;
 189 }
 190
 191
 192 /**
 193  * Calculate the framebuffer parameters for all buffers (front, back, depth,
 194  * and stencil) associated with the specified context.
 195  *
 196  * \warning
 197  * This function also calls \c AllocateBuffer to actually allocate the
 198  * buffers.
 199  *
 200  * \sa AllocateBuffer
 201  */
 202 static GLboolean
 203 calculate_buffer_parameters(struct via_context *vmesa,
 204                             struct gl_framebuffer *fb,
 205                             __DRIdrawable *dPriv)
 206 {
 207    const unsigned shift = vmesa->viaScreen->bitsPerPixel / 16;
 208    const unsigned extra = 32;
 209    unsigned w;
 210    unsigned h;
 211
 212    /* Normally, the renderbuffer would be added to the framebuffer just once
 213     * when the framebuffer was created.  The VIA driver is a bit funny
 214     * though in that the front/back/depth renderbuffers are in the per-context
 215     * state!
 216     * That should be fixed someday.
 217     */
 218
 219    if (!vmesa->front.Base.InternalFormat) {
 220       /* do one-time init for the renderbuffers */
 221       viaInitRenderbuffer(&vmesa->front, GL_RGBA, dPriv);
 222       viaSetSpanFunctions(&vmesa->front, &fb->Visual);
 223       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &vmesa->front.Base);
 224
 225       if (fb->Visual.doubleBufferMode) {
 226          viaInitRenderbuffer(&vmesa->back, GL_RGBA, dPriv);
 227          viaSetSpanFunctions(&vmesa->back, &fb->Visual);
 228          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &vmesa->back.Base);
 229       }
 230
 231       if (vmesa->glCtx->Visual.depthBits > 0) {
 232          viaInitRenderbuffer(&vmesa->depth,
 233                              (vmesa->glCtx->Visual.depthBits == 16
 234                               ? GL_DEPTH_COMPONENT16 : GL_DEPTH_COMPONENT24),
 235                              dPriv);
 236          viaSetSpanFunctions(&vmesa->depth, &fb->Visual);
 237          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &vmesa->depth.Base);
 238       }
 239
 240       if (vmesa->glCtx->Visual.stencilBits > 0) {
 241          viaInitRenderbuffer(&vmesa->stencil, GL_STENCIL_INDEX8_EXT,
 242                              dPriv);
 243          viaSetSpanFunctions(&vmesa->stencil, &fb->Visual);
 244          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &vmesa->stencil.Base);
 245       }
 246    }
 247
 248    assert(vmesa->front.Base.InternalFormat);
 249    assert(vmesa->front.Base.AllocStorage);
 250    if (fb->Visual.doubleBufferMode) {
 251       assert(vmesa->back.Base.AllocStorage);
 252    }
 253    if (fb->Visual.depthBits) {
 254       assert(vmesa->depth.Base.AllocStorage);
 255    }
 256
 257
 258    /* Allocate front-buffer */
 259    if (vmesa->drawType == GLX_PBUFFER_BIT) {
 260       w = vmesa->driDrawable->w;
 261       h = vmesa->driDrawable->h;
 262
 263       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 264       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 265       vmesa->front.size = vmesa->front.pitch * h;
 266
 267       if (vmesa->front.map)
 268          via_free_draw_buffer(vmesa, &vmesa->front);
 269       if (!via_alloc_draw_buffer(vmesa, &vmesa->front))
 270          return GL_FALSE;
 271
 272    } else {
 273       w = vmesa->viaScreen->width;
 274       h = vmesa->viaScreen->height;
 275
 276       vmesa->front.bpp = vmesa->viaScreen->bitsPerPixel;
 277       vmesa->front.pitch = buffer_align( w ) << shift; /* bytes, not pixels */
 278       vmesa->front.size = vmesa->front.pitch * h;
 279       if (getenv("ALTERNATE_SCREEN"))
 280         vmesa->front.offset = vmesa->front.size;
 281       else
 282         vmesa->front.offset = 0;
 283       vmesa->front.map = (char *) vmesa->driScreen->pFB;
 284    }
 285
 286
 287    /* Allocate back-buffer */
 288    if (vmesa->hasBack) {
 289       vmesa->back.bpp = vmesa->viaScreen->bitsPerPixel;
 290       vmesa->back.pitch = (buffer_align( vmesa->driDrawable->w ) << shift);
 291       vmesa->back.pitch += extra;
 292       vmesa->back.pitch = MIN2(vmesa->back.pitch, vmesa->front.pitch);
 293       vmesa->back.size = vmesa->back.pitch * vmesa->driDrawable->h;
 294       if (vmesa->back.map)
 295          via_free_draw_buffer(vmesa, &vmesa->back);
 296       if (!via_alloc_draw_buffer(vmesa, &vmesa->back))
 297          return GL_FALSE;
 298    }
 299    else {
 300       if (vmesa->back.map)
 301          via_free_draw_buffer(vmesa, &vmesa->back);
 302       (void) memset( &vmesa->back, 0, sizeof( vmesa->back ) );
 303    }
 304
 305
 306    /* Allocate depth-buffer */
 307    if ( vmesa->hasStencil || vmesa->hasDepth ) {
 308       vmesa->depth.bpp = vmesa->depthBits;
 309       if (vmesa->depth.bpp == 24)
 310          vmesa->depth.bpp = 32;
 311
 312       vmesa->depth.pitch = (buffer_align( vmesa->driDrawable->w ) *
 313                             (vmesa->depth.bpp/8)) + extra;
 314       vmesa->depth.size = vmesa->depth.pitch * vmesa->driDrawable->h;
 315
 316       if (vmesa->depth.map)
 317          via_free_draw_buffer(vmesa, &vmesa->depth);
 318       if (!via_alloc_draw_buffer(vmesa, &vmesa->depth)) {
 319          return GL_FALSE;
 320       }
 321    }
 322    else {
 323       if (vmesa->depth.map)
 324          via_free_draw_buffer(vmesa, &vmesa->depth);
 325       (void) memset( & vmesa->depth, 0, sizeof( vmesa->depth ) );
 326    }
 327
 328    /* stencil buffer is same as depth buffer */
 329    vmesa->stencil.handle = vmesa->depth.handle;
 330    vmesa->stencil.size = vmesa->depth.size;
 331    vmesa->stencil.offset = vmesa->depth.offset;
 332    vmesa->stencil.index = vmesa->depth.index;
 333    vmesa->stencil.pitch = vmesa->depth.pitch;
 334    vmesa->stencil.bpp = vmesa->depth.bpp;
 335    vmesa->stencil.map = vmesa->depth.map;
 336    vmesa->stencil.orig = vmesa->depth.orig;
 337    vmesa->stencil.origMap = vmesa->depth.origMap;
 338
 339    if( vmesa->viaScreen->width == vmesa->driDrawable->w &&
 340        vmesa->viaScreen->height == vmesa->driDrawable->h ) {
 341       vmesa->doPageFlip = vmesa->allowPageFlip;
 342       if (vmesa->hasBack) {
 343          assert(vmesa->back.pitch == vmesa->front.pitch);
 344       }
 345    }
 346    else
 347       vmesa->doPageFlip = GL_FALSE;
 348
 349    return GL_TRUE;
 350 }
 351
 352
 353 void viaReAllocateBuffers(struct gl_context *ctx, struct gl_framebuffer *drawbuffer,
 354                           GLuint width, GLuint height)
 355 {
 356     struct via_context *vmesa = VIA_CONTEXT(ctx);
 357
 358     calculate_buffer_parameters(vmesa, drawbuffer, vmesa->driDrawable);
 359
 360     _mesa_resize_framebuffer(ctx, drawbuffer, width, height);
 361 }
 362
 363 /* Extension strings exported by the Unichrome driver.
 364  */
 365 static const struct dri_extension card_extensions[] =
 366 {
 367     { "GL_ARB_multitexture",               NULL },
 368     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 369     { "GL_ARB_texture_env_add",            NULL },
 370     { "GL_ARB_texture_env_combine",        NULL },
 371 /*    { "GL_ARB_texture_env_dot3",           NULL }, */
 372     { "GL_ARB_texture_mirrored_repeat",    NULL },
 373     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 374     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 375     { "GL_EXT_stencil_wrap",               NULL },
 376     { "GL_EXT_texture_env_combine",        NULL },
 377 /*    { "GL_EXT_texture_env_dot3",           NULL }, */
 378     { "GL_EXT_texture_lod_bias",           NULL },
 379     { "GL_NV_blend_square",                NULL },
 380     { NULL,                                NULL }
 381 };
 382
 383 extern const struct tnl_pipeline_stage _via_fastrender_stage;
 384 extern const struct tnl_pipeline_stage _via_render_stage;
 385
 386 static const struct tnl_pipeline_stage *via_pipeline[] = {
 387     &_tnl_vertex_transform_stage,
 388     &_tnl_normal_transform_stage,
 389     &_tnl_lighting_stage,
 390     &_tnl_fog_coordinate_stage,
 391     &_tnl_texgen_stage,
 392     &_tnl_texture_transform_stage,
 393     /* REMOVE: point attenuation stage */
 394 #if 1
 395     &_via_fastrender_stage,     /* ADD: unclipped rastersetup-to-dma */
 396 #endif
 397     &_tnl_render_stage,
 398     0,
 399 };
 400
 401
 402 static const struct dri_debug_control debug_control[] =
 403 {
 404     { "fall",  DEBUG_FALLBACKS },
 405     { "tex",   DEBUG_TEXTURE },
 406     { "ioctl", DEBUG_IOCTL },
 407     { "prim",  DEBUG_PRIMS },
 408     { "vert",  DEBUG_VERTS },
 409     { "state", DEBUG_STATE },
 410     { "verb",  DEBUG_VERBOSE },
 411     { "dri",   DEBUG_DRI },
 412     { "dma",   DEBUG_DMA },
 413     { "san",   DEBUG_SANITY },
 414     { "sync",  DEBUG_SYNC },
 415     { "sleep", DEBUG_SLEEP },
 416     { "pix",   DEBUG_PIXEL },
 417     { "2d",    DEBUG_2D },
 418     { NULL,    0 }
 419 };
 420
 421
 422 static GLboolean
 423 AllocateDmaBuffer(struct via_context *vmesa)
 424 {
 425     if (vmesa->dma)
 426         via_free_dma_buffer(vmesa);
 427
 428     if (!via_alloc_dma_buffer(vmesa))
 429         return GL_FALSE;
 430
 431     vmesa->dmaLow = 0;
 432     vmesa->dmaCliprectAddr = ~0;
 433     return GL_TRUE;
 434 }
 435
 436 static void
 437 FreeBuffer(struct via_context *vmesa)
 438 {
 439     if (vmesa->front.map && vmesa->drawType == GLX_PBUFFER_BIT)
 440         via_free_draw_buffer(vmesa, &vmesa->front);
 441
 442     if (vmesa->back.map)
 443         via_free_draw_buffer(vmesa, &vmesa->back);
 444
 445     if (vmesa->depth.map)
 446         via_free_draw_buffer(vmesa, &vmesa->depth);
 447
 448     if (vmesa->breadcrumb.map)
 449         via_free_draw_buffer(vmesa, &vmesa->breadcrumb);
 450
 451     if (vmesa->dma)
 452         via_free_dma_buffer(vmesa);
 453 }
 454
 455
 456 GLboolean
 457 viaCreateContext(gl_api api,
 458                  const struct gl_config *visual,
 459                  __DRIcontext *driContextPriv,
 460                  void *sharedContextPrivate)
 461 {
 462     struct gl_context *ctx, *shareCtx;
 463     struct via_context *vmesa;
 464     __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 465     viaScreenPrivate *viaScreen = (viaScreenPrivate *)sPriv->private;
 466     drm_via_sarea_t *saPriv = (drm_via_sarea_t *)
 467         (((GLubyte *)sPriv->pSAREA) + viaScreen->sareaPrivOffset);
 468     struct dd_function_table functions;
 469
 470     /* Allocate via context */
 471     vmesa = (struct via_context *) CALLOC_STRUCT(via_context);
 472     if (!vmesa) {
 473         return GL_FALSE;
 474     }
 475
 476     /* Parse configuration files.
 477      */
 478     driParseConfigFiles (&vmesa->optionCache, &viaScreen->optionCache,
 479                          sPriv->myNum, "unichrome");
 480
 481     /* pick back buffer */
 482     vmesa->hasBack = visual->doubleBufferMode;
 483
 484     switch(visual->depthBits) {
 485     case 0:
 486        vmesa->hasDepth = GL_FALSE;
 487        vmesa->depthBits = 0;
 488        vmesa->depth_max = 1.0;
 489        break;
 490     case 16:
 491        vmesa->hasDepth = GL_TRUE;
 492        vmesa->depthBits = visual->depthBits;
 493        vmesa->have_hw_stencil = GL_FALSE;
 494        vmesa->depth_max = (GLfloat)0xffff;
 495        vmesa->depth_clear_mask = 0xf << 28;
 496        vmesa->ClearDepth = 0xffff;
 497        vmesa->polygon_offset_scale = 1.0 / vmesa->depth_max;
 498        break;
 499     case 24:
 500        vmesa->hasDepth = GL_TRUE;
 501        vmesa->depthBits = visual->depthBits;
 502        vmesa->depth_max = (GLfloat) 0xffffff;
 503        vmesa->depth_clear_mask = 0xe << 28;
 504        vmesa->ClearDepth = 0xffffff00;
 505
 506        assert(visual->haveStencilBuffer);
 507        assert(visual->stencilBits == 8);
 508
 509        vmesa->have_hw_stencil = GL_TRUE;
 510        vmesa->stencilBits = visual->stencilBits;
 511        vmesa->stencil_clear_mask = 0x1 << 28;
 512        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 513        break;
 514     case 32:
 515        vmesa->hasDepth = GL_TRUE;
 516        vmesa->depthBits = visual->depthBits;
 517        assert(!visual->haveStencilBuffer);
 518        vmesa->have_hw_stencil = GL_FALSE;
 519        vmesa->depth_max = (GLfloat)0xffffffff;
 520        vmesa->depth_clear_mask = 0xf << 28;
 521        vmesa->ClearDepth = 0xffffffff;
 522        vmesa->polygon_offset_scale = 2.0 / vmesa->depth_max;
 523        break;
 524     default:
 525        assert(0);
 526        break;
 527     }
 528
 529     make_empty_list(&vmesa->freed_tex_buffers);
 530     make_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]);
 531     make_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]);
 532     make_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]);
 533
 534     _mesa_init_driver_functions(&functions);
 535     viaInitTextureFuncs(&functions);
 536
 537     /* Allocate the Mesa context */
 538     if (sharedContextPrivate)
 539         shareCtx = ((struct via_context *) sharedContextPrivate)->glCtx;
 540     else
 541         shareCtx = NULL;
 542
 543     vmesa->glCtx = _mesa_create_context(API_OPENGL, visual, shareCtx, &functions,
 544                                         (void*) vmesa);
 545
 546     vmesa->shareCtx = shareCtx;
 547
 548     if (!vmesa->glCtx) {
 549         FREE(vmesa);
 550         return GL_FALSE;
 551     }
 552     driContextPriv->driverPrivate = vmesa;
 553
 554     ctx = vmesa->glCtx;
 555
 556     if (driQueryOptionb(&vmesa->optionCache, "excess_mipmap"))
 557         ctx->Const.MaxTextureLevels = 11;
 558     else
 559         ctx->Const.MaxTextureLevels = 10;
 560
 561     ctx->Const.MaxTextureUnits = 2;
 562     ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 563     ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 564
 565     ctx->Const.MinLineWidth = 1.0;
 566     ctx->Const.MinLineWidthAA = 1.0;
 567     ctx->Const.MaxLineWidth = 1.0;
 568     ctx->Const.MaxLineWidthAA = 1.0;
 569     ctx->Const.LineWidthGranularity = 1.0;
 570
 571     ctx->Const.MinPointSize = 1.0;
 572     ctx->Const.MinPointSizeAA = 1.0;
 573     ctx->Const.MaxPointSize = 1.0;
 574     ctx->Const.MaxPointSizeAA = 1.0;
 575     ctx->Const.PointSizeGranularity = 1.0;
 576
 577     ctx->Const.MaxDrawBuffers = 1;
 578
 579     ctx->Driver.GetString = viaGetString;
 580
 581     ctx->DriverCtx = (void *)vmesa;
 582     vmesa->glCtx = ctx;
 583
 584     /* Initialize the software rasterizer and helper modules.
 585      */
 586     _swrast_CreateContext(ctx);
 587     _vbo_CreateContext(ctx);
 588     _tnl_CreateContext(ctx);
 589     _swsetup_CreateContext(ctx);
 590
 591     /* Install the customized pipeline:
 592      */
 593     _tnl_destroy_pipeline(ctx);
 594     _tnl_install_pipeline(ctx, via_pipeline);
 595
 596     /* Configure swrast and T&L to match hardware characteristics:
 597      */
 598     _swrast_allow_pixel_fog(ctx, GL_FALSE);
 599     _swrast_allow_vertex_fog(ctx, GL_TRUE);
 600     _tnl_allow_pixel_fog(ctx, GL_FALSE);
 601     _tnl_allow_vertex_fog(ctx, GL_TRUE);
 602
 603     vmesa->hHWContext = driContextPriv->hHWContext;
 604     vmesa->driFd = sPriv->fd;
 605     vmesa->driHwLock = &sPriv->pSAREA->lock;
 606
 607     vmesa->viaScreen = viaScreen;
 608     vmesa->driScreen = sPriv;
 609     vmesa->sarea = saPriv;
 610
 611     vmesa->renderIndex = ~0;
 612     vmesa->setupIndex = ~0;
 613     vmesa->hwPrimitive = GL_POLYGON+1;
 614
 615     /* KW: Hardwire this.  Was previously set bogusly in
 616      * viaCreateBuffer.  Needs work before PBUFFER can be used:
 617      */
 618     vmesa->drawType = GLX_WINDOW_BIT;
 619
 620
 621     _math_matrix_ctr(&vmesa->ViewportMatrix);
 622
 623     /* Do this early, before VIA_FLUSH_DMA can be called:
 624      */
 625     if (!AllocateDmaBuffer(vmesa)) {
 626         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 627         FreeBuffer(vmesa);
 628         FREE(vmesa);
 629         return GL_FALSE;
 630     }
 631
 632     /* Allocate a small piece of fb memory for synchronization:
 633      */
 634     vmesa->breadcrumb.bpp = 32;
 635     vmesa->breadcrumb.pitch = buffer_align( 64 ) << 2;
 636     vmesa->breadcrumb.size = vmesa->breadcrumb.pitch;
 637
 638     if (!via_alloc_draw_buffer(vmesa, &vmesa->breadcrumb)) {
 639         fprintf(stderr ,"AllocateDmaBuffer fail\n");
 640         FreeBuffer(vmesa);
 641         FREE(vmesa);
 642         return GL_FALSE;
 643     }
 644
 645     driInitExtensions( ctx, card_extensions, GL_TRUE );
 646     viaInitStateFuncs(ctx);
 647     viaInitTriFuncs(ctx);
 648     viaInitSpanFuncs(ctx);
 649     viaInitIoctlFuncs(ctx);
 650     viaInitState(ctx);
 651
 652     if (getenv("VIA_DEBUG"))
 653        VIA_DEBUG = driParseDebugString( getenv( "VIA_DEBUG" ),
 654                                         debug_control );
 655
 656     if (getenv("VIA_NO_RAST") ||
 657         driQueryOptionb(&vmesa->optionCache, "no_rast"))
 658        FALLBACK(vmesa, VIA_FALLBACK_USER_DISABLE, 1);
 659
 660     if (getenv("VIA_PAGEFLIP"))
 661        vmesa->allowPageFlip = 1;
 662
 663     (*sPriv->systemTime->getUST)( &vmesa->swap_ust );
 664
 665
 666     vmesa->regMMIOBase = (GLuint *)((unsigned long)viaScreen->reg);
 667     vmesa->pnGEMode = (GLuint *)((unsigned long)viaScreen->reg + 0x4);
 668     vmesa->regEngineStatus = (GLuint *)((unsigned long)viaScreen->reg + 0x400);
 669     vmesa->regTranSet = (GLuint *)((unsigned long)viaScreen->reg + 0x43C);
 670     vmesa->regTranSpace = (GLuint *)((unsigned long)viaScreen->reg + 0x440);
 671     vmesa->agpBase = viaScreen->agpBase;
 672
 673
 674     return GL_TRUE;
 675 }
 676
 677 void
 678 viaDestroyContext(__DRIcontext *driContextPriv)
 679 {
 680     GET_CURRENT_CONTEXT(ctx);
 681     struct via_context *vmesa =
 682        (struct via_context *)driContextPriv->driverPrivate;
 683     struct via_context *current = ctx ? VIA_CONTEXT(ctx) : NULL;
 684
 685     assert(vmesa); /* should never be null */
 686
 687     if (vmesa->driDrawable) {
 688        viaWaitIdle(vmesa, GL_FALSE);
 689
 690        if (vmesa->doPageFlip) {
 691           LOCK_HARDWARE(vmesa);
 692           if (vmesa->pfCurrentOffset != 0) {
 693              fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 694              viaResetPageFlippingLocked(vmesa);
 695           }
 696           UNLOCK_HARDWARE(vmesa);
 697        }
 698     }
 699
 700     /* check if we're deleting the currently bound context */
 701     if (vmesa == current) {
 702       VIA_FLUSH_DMA(vmesa);
 703       _mesa_make_current(NULL, NULL, NULL);
 704     }
 705
 706     _swsetup_DestroyContext(vmesa->glCtx);
 707     _tnl_DestroyContext(vmesa->glCtx);
 708     _vbo_DestroyContext(vmesa->glCtx);
 709     _swrast_DestroyContext(vmesa->glCtx);
 710     /* free the Mesa context */
 711     _mesa_destroy_context(vmesa->glCtx);
 712     /* release our data */
 713     FreeBuffer(vmesa);
 714
 715     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_AGP]));
 716     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_VIDEO]));
 717     assert (is_empty_list(&vmesa->tex_image_list[VIA_MEM_SYSTEM]));
 718     assert (is_empty_list(&vmesa->freed_tex_buffers));
 719
 720     driDestroyOptionCache(&vmesa->optionCache);
 721
 722     FREE(vmesa);
 723 }
 724
 725
 726 void viaXMesaWindowMoved(struct via_context *vmesa)
 727 {
 728    __DRIdrawable *const drawable = vmesa->driDrawable;
 729    __DRIdrawable *const readable = vmesa->driReadable;
 730    struct via_renderbuffer * draw_buffer;
 731    struct via_renderbuffer * read_buffer;
 732    GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
 733
 734    if (!drawable)
 735       return;
 736
 737    draw_buffer =  (struct via_renderbuffer *) drawable->driverPrivate;
 738    read_buffer =  (struct via_renderbuffer *) readable->driverPrivate;
 739
 740    switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0]) {
 741    case BUFFER_BACK_LEFT:
 742       if (drawable->numBackClipRects == 0) {
 743          vmesa->numClipRects = drawable->numClipRects;
 744          vmesa->pClipRects = drawable->pClipRects;
 745       }
 746       else {
 747          vmesa->numClipRects = drawable->numBackClipRects;
 748          vmesa->pClipRects = drawable->pBackClipRects;
 749       }
 750       break;
 751    case BUFFER_FRONT_LEFT:
 752       vmesa->numClipRects = drawable->numClipRects;
 753       vmesa->pClipRects = drawable->pClipRects;
 754       break;
 755    default:
 756       vmesa->numClipRects = 0;
 757       break;
 758    }
 759
 760    if ((draw_buffer->drawW != drawable->w)
 761        || (draw_buffer->drawH != drawable->h)) {
 762       calculate_buffer_parameters(vmesa, vmesa->glCtx->DrawBuffer,
 763                                   drawable);
 764    }
 765
 766    draw_buffer->drawX = drawable->x;
 767    draw_buffer->drawY = drawable->y;
 768    draw_buffer->drawW = drawable->w;
 769    draw_buffer->drawH = drawable->h;
 770
 771    if (drawable != readable) {
 772       if ((read_buffer->drawW != readable->w)
 773           || (read_buffer->drawH != readable->h)) {
 774          calculate_buffer_parameters(vmesa, vmesa->glCtx->ReadBuffer,
 775                                      readable);
 776       }
 777
 778       read_buffer->drawX = readable->x;
 779       read_buffer->drawY = readable->y;
 780       read_buffer->drawW = readable->w;
 781       read_buffer->drawH = readable->h;
 782    }
 783
 784    vmesa->front.orig = (vmesa->front.offset +
 785                         draw_buffer->drawY * vmesa->front.pitch +
 786                         draw_buffer->drawX * bytePerPixel);
 787
 788    vmesa->front.origMap = (vmesa->front.map +
 789                         draw_buffer->drawY * vmesa->front.pitch +
 790                         draw_buffer->drawX * bytePerPixel);
 791
 792    vmesa->back.orig = (vmesa->back.offset +
 793                         draw_buffer->drawY * vmesa->back.pitch +
 794                         draw_buffer->drawX * bytePerPixel);
 795
 796    vmesa->back.origMap = (vmesa->back.map +
 797                         draw_buffer->drawY * vmesa->back.pitch +
 798                         draw_buffer->drawX * bytePerPixel);
 799
 800    vmesa->depth.orig = (vmesa->depth.offset +
 801                         draw_buffer->drawY * vmesa->depth.pitch +
 802                         draw_buffer->drawX * bytePerPixel);
 803
 804    vmesa->depth.origMap = (vmesa->depth.map +
 805                         draw_buffer->drawY * vmesa->depth.pitch +
 806                         draw_buffer->drawX * bytePerPixel);
 807
 808    viaCalcViewport(vmesa->glCtx);
 809 }
 810
 811 GLboolean
 812 viaUnbindContext(__DRIcontext *driContextPriv)
 813 {
 814     return GL_TRUE;
 815 }
 816
 817 GLboolean
 818 viaMakeCurrent(__DRIcontext *driContextPriv,
 819                __DRIdrawable *driDrawPriv,
 820                __DRIdrawable *driReadPriv)
 821 {
 822     if (VIA_DEBUG & DEBUG_DRI) {
 823         fprintf(stderr, "driContextPriv = %016lx\n", (unsigned long)driContextPriv);
 824         fprintf(stderr, "driDrawPriv = %016lx\n", (unsigned long)driDrawPriv);
 825         fprintf(stderr, "driReadPriv = %016lx\n", (unsigned long)driReadPriv);
 826     }
 827
 828     if (driContextPriv) {
 829         struct via_context *vmesa =
 830            (struct via_context *)driContextPriv->driverPrivate;
 831         struct gl_context *ctx = vmesa->glCtx;
 832         struct gl_framebuffer *drawBuffer, *readBuffer;
 833
 834         drawBuffer = (struct gl_framebuffer *)driDrawPriv->driverPrivate;
 835         readBuffer = (struct gl_framebuffer *)driReadPriv->driverPrivate;
 836
 837        if ((vmesa->driDrawable != driDrawPriv)
 838            || (vmesa->driReadable != driReadPriv)) {
 839           if (driDrawPriv->swap_interval == (unsigned)-1) {
 840              driDrawPriv->vblFlags =
 841                 vmesa->viaScreen->irqEnabled ?
 842                 driGetDefaultVBlankFlags(&vmesa->optionCache) :
 843                 VBLANK_FLAG_NO_IRQ;
 844
 845              driDrawableInitVBlank(driDrawPriv);
 846           }
 847
 848           vmesa->driDrawable = driDrawPriv;
 849           vmesa->driReadable = driReadPriv;
 850
 851           if ((drawBuffer->Width != driDrawPriv->w)
 852               || (drawBuffer->Height != driDrawPriv->h)) {
 853              _mesa_resize_framebuffer(ctx, drawBuffer,
 854                                       driDrawPriv->w, driDrawPriv->h);
 855              drawBuffer->Initialized = GL_TRUE;
 856           }
 857
 858           if (!calculate_buffer_parameters(vmesa, drawBuffer, driDrawPriv)) {
 859              return GL_FALSE;
 860           }
 861
 862           if (driDrawPriv != driReadPriv) {
 863              if ((readBuffer->Width != driReadPriv->w)
 864                  || (readBuffer->Height != driReadPriv->h)) {
 865                 _mesa_resize_framebuffer(ctx, readBuffer,
 866                                          driReadPriv->w, driReadPriv->h);
 867                 readBuffer->Initialized = GL_TRUE;
 868              }
 869
 870              if (!calculate_buffer_parameters(vmesa, readBuffer, driReadPriv)) {
 871                 return GL_FALSE;
 872              }
 873           }
 874        }
 875
 876         _mesa_make_current(vmesa->glCtx, drawBuffer, readBuffer);
 877
 878         ctx->Driver.DrawBuffer( ctx, ctx->Color.DrawBuffer[0] );
 879
 880         viaXMesaWindowMoved(vmesa);
 881         ctx->Driver.Scissor(vmesa->glCtx,
 882                             vmesa->glCtx->Scissor.X,
 883                             vmesa->glCtx->Scissor.Y,
 884                             vmesa->glCtx->Scissor.Width,
 885                             vmesa->glCtx->Scissor.Height);
 886     }
 887     else {
 888         _mesa_make_current(NULL, NULL, NULL);
 889     }
 890
 891     return GL_TRUE;
 892 }
 893
 894 void viaGetLock(struct via_context *vmesa, GLuint flags)
 895 {
 896     __DRIdrawable *dPriv = vmesa->driDrawable;
 897     __DRIscreen *sPriv = vmesa->driScreen;
 898
 899     drmGetLock(vmesa->driFd, vmesa->hHWContext, flags);
 900
 901     DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 902     if (dPriv != vmesa->driReadable) {
 903         DRI_VALIDATE_DRAWABLE_INFO(sPriv, vmesa->driReadable);
 904     }
 905
 906     if (vmesa->sarea->ctxOwner != vmesa->hHWContext) {
 907        vmesa->sarea->ctxOwner = vmesa->hHWContext;
 908        vmesa->newEmitState = ~0;
 909     }
 910
 911     if (vmesa->lastStamp != dPriv->lastStamp) {
 912        viaXMesaWindowMoved(vmesa);
 913        driUpdateFramebufferSize(vmesa->glCtx, dPriv);
 914        vmesa->newEmitState = ~0;
 915        vmesa->lastStamp = dPriv->lastStamp;
 916     }
 917
 918     if (vmesa->doPageFlip &&
 919         vmesa->pfCurrentOffset != vmesa->sarea->pfCurrentOffset) {
 920        fprintf(stderr, "%s - reset pf\n", __FUNCTION__);
 921        viaResetPageFlippingLocked(vmesa);
 922     }
 923 }
 924
 925
 926 void
 927 viaSwapBuffers(__DRIdrawable *drawablePrivate)
 928 {
 929     __DRIdrawable *dPriv = (__DRIdrawable *)drawablePrivate;
 930
 931     if (dPriv &&
 932         dPriv->driContextPriv &&
 933         dPriv->driContextPriv->driverPrivate) {
 934         struct via_context *vmesa =
 935            (struct via_context *)dPriv->driContextPriv->driverPrivate;
 936         struct gl_context *ctx = vmesa->glCtx;
 937
 938         _mesa_notifySwapBuffers(ctx);
 939
 940         if (ctx->Visual.doubleBufferMode) {
 941             if (vmesa->doPageFlip) {
 942                 viaPageFlip(dPriv);
 943             }
 944             else {
 945                 viaCopyBuffer(dPriv);
 946             }
 947         }
 948         else
 949             VIA_FLUSH_DMA(vmesa);
 950     }
 951     else {
 952         _mesa_problem(NULL, "viaSwapBuffers: drawable has no context!\n");
 953     }
 954 }