src/mesa/state_tracker/st_cb_fbo.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 /**
  30  * Framebuffer/renderbuffer functions.
  31  *
  32  * \author Brian Paul
  33  */
  34
  35
  36 #include "main/imports.h"
  37 #include "main/context.h"
  38 #include "main/fbobject.h"
  39 #include "main/framebuffer.h"
  40 #include "main/glformats.h"
  41 #include "main/macros.h"
  42 #include "main/renderbuffer.h"
  43
  44 #include "pipe/p_context.h"
  45 #include "pipe/p_defines.h"
  46 #include "pipe/p_screen.h"
  47 #include "st_context.h"
  48 #include "st_cb_fbo.h"
  49 #include "st_cb_flush.h"
  50 #include "st_cb_texture.h"
  51 #include "st_format.h"
  52 #include "st_texture.h"
  53 #include "st_manager.h"
  54
  55 #include "util/u_format.h"
  56 #include "util/u_inlines.h"
  57 #include "util/u_surface.h"
  58
  59
  60 static GLboolean
  61 st_renderbuffer_alloc_sw_storage(struct gl_context * ctx,
  62                                  struct gl_renderbuffer *rb,
  63                                  GLenum internalFormat,
  64                                  GLuint width, GLuint height)
  65 {
  66    struct st_context *st = st_context(ctx);
  67    struct st_renderbuffer *strb = st_renderbuffer(rb);
  68    enum pipe_format format;
  69    size_t size;
  70
  71    free(strb->data);
  72    strb->data = NULL;
  73
  74    if (internalFormat == GL_RGBA16_SNORM) {
  75       /* Special case for software accum buffers.  Otherwise, if the
  76        * call to st_choose_renderbuffer_format() fails (because the
  77        * driver doesn't support signed 16-bit/channel colors) we'd
  78        * just return without allocating the software accum buffer.
  79        */
  80       format = PIPE_FORMAT_R16G16B16A16_SNORM;
  81    }
  82    else {
  83       format = st_choose_renderbuffer_format(st, internalFormat, 0);
  84
  85       /* Not setting gl_renderbuffer::Format here will cause
  86        * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
  87        */
  88       if (format == PIPE_FORMAT_NONE) {
  89          return GL_TRUE;
  90       }
  91    }
  92
  93    strb->Base.Format = st_pipe_format_to_mesa_format(format);
  94
  95    size = _mesa_format_image_size(strb->Base.Format, width, height, 1);
  96    strb->data = malloc(size);
  97    return strb->data != NULL;
  98 }
  99
 100
 101 /**
 102  * gl_renderbuffer::AllocStorage()
 103  * This is called to allocate the original drawing surface, and
 104  * during window resize.
 105  */
 106 static GLboolean
 107 st_renderbuffer_alloc_storage(struct gl_context * ctx,
 108                               struct gl_renderbuffer *rb,
 109                               GLenum internalFormat,
 110                               GLuint width, GLuint height)
 111 {
 112    struct st_context *st = st_context(ctx);
 113    struct pipe_context *pipe = st->pipe;
 114    struct pipe_screen *screen = st->pipe->screen;
 115    struct st_renderbuffer *strb = st_renderbuffer(rb);
 116    enum pipe_format format = PIPE_FORMAT_NONE;
 117    struct pipe_surface surf_tmpl;
 118    struct pipe_resource templ;
 119
 120    /* init renderbuffer fields */
 121    strb->Base.Width  = width;
 122    strb->Base.Height = height;
 123    strb->Base._BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 124    strb->defined = GL_FALSE;  /* undefined contents now */
 125
 126    if (strb->software) {
 127       return st_renderbuffer_alloc_sw_storage(ctx, rb, internalFormat,
 128                                               width, height);
 129    }
 130
 131    /* Free the old surface and texture
 132     */
 133    pipe_surface_reference( &strb->surface, NULL );
 134    pipe_resource_reference( &strb->texture, NULL );
 135
 136    /* If an sRGB framebuffer is unsupported, sRGB formats behave like linear
 137     * formats.
 138     */
 139    if (!ctx->Extensions.EXT_framebuffer_sRGB) {
 140       internalFormat = _mesa_get_linear_internalformat(internalFormat);
 141    }
 142
 143    /* Handle multisample renderbuffers first.
 144     *
 145     * From ARB_framebuffer_object:
 146     *   If <samples> is zero, then RENDERBUFFER_SAMPLES is set to zero.
 147     *   Otherwise <samples> represents a request for a desired minimum
 148     *   number of samples. Since different implementations may support
 149     *   different sample counts for multisampled rendering, the actual
 150     *   number of samples allocated for the renderbuffer image is
 151     *   implementation dependent.  However, the resulting value for
 152     *   RENDERBUFFER_SAMPLES is guaranteed to be greater than or equal
 153     *   to <samples> and no more than the next larger sample count supported
 154     *   by the implementation.
 155     *
 156     * So let's find the supported number of samples closest to NumSamples.
 157     * (NumSamples == 1) is treated the same as (NumSamples == 0).
 158     */
 159    if (rb->NumSamples > 1) {
 160       unsigned i;
 161
 162       for (i = rb->NumSamples; i <= ctx->Const.MaxSamples; i++) {
 163          format = st_choose_renderbuffer_format(st, internalFormat, i);
 164
 165          if (format != PIPE_FORMAT_NONE) {
 166             rb->NumSamples = i;
 167             break;
 168          }
 169       }
 170    } else {
 171       format = st_choose_renderbuffer_format(st, internalFormat, 0);
 172    }
 173
 174    /* Not setting gl_renderbuffer::Format here will cause
 175     * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
 176     */
 177    if (format == PIPE_FORMAT_NONE) {
 178       return GL_TRUE;
 179    }
 180
 181    strb->Base.Format = st_pipe_format_to_mesa_format(format);
 182
 183    if (width == 0 || height == 0) {
 184       /* if size is zero, nothing to allocate */
 185       return GL_TRUE;
 186    }
 187
 188    /* Setup new texture template.
 189     */
 190    memset(&templ, 0, sizeof(templ));
 191    templ.target = st->internal_target;
 192    templ.format = format;
 193    templ.width0 = width;
 194    templ.height0 = height;
 195    templ.depth0 = 1;
 196    templ.array_size = 1;
 197    templ.nr_samples = rb->NumSamples;
 198    if (util_format_is_depth_or_stencil(format)) {
 199       templ.bind = PIPE_BIND_DEPTH_STENCIL;
 200    }
 201    else if (strb->Base.Name != 0) {
 202       /* this is a user-created renderbuffer */
 203       templ.bind = PIPE_BIND_RENDER_TARGET;
 204    }
 205    else {
 206       /* this is a window-system buffer */
 207       templ.bind = (PIPE_BIND_DISPLAY_TARGET |
 208                     PIPE_BIND_RENDER_TARGET);
 209    }
 210
 211    strb->texture = screen->resource_create(screen, &templ);
 212
 213    if (!strb->texture)
 214       return FALSE;
 215
 216    u_surface_default_template(&surf_tmpl, strb->texture);
 217    strb->surface = pipe->create_surface(pipe,
 218                                         strb->texture,
 219                                         &surf_tmpl);
 220    if (strb->surface) {
 221       assert(strb->surface->texture);
 222       assert(strb->surface->format);
 223       assert(strb->surface->width == width);
 224       assert(strb->surface->height == height);
 225    }
 226
 227    return strb->surface != NULL;
 228 }
 229
 230
 231 /**
 232  * gl_renderbuffer::Delete()
 233  */
 234 static void
 235 st_renderbuffer_delete(struct gl_context *ctx, struct gl_renderbuffer *rb)
 236 {
 237    struct st_renderbuffer *strb = st_renderbuffer(rb);
 238    if (ctx) {
 239       struct st_context *st = st_context(ctx);
 240       pipe_surface_release(st->pipe, &strb->surface);
 241    }
 242    pipe_resource_reference(&strb->texture, NULL);
 243    free(strb->data);
 244    _mesa_delete_renderbuffer(ctx, rb);
 245 }
 246
 247
 248 /**
 249  * Called via ctx->Driver.NewRenderbuffer()
 250  */
 251 static struct gl_renderbuffer *
 252 st_new_renderbuffer(struct gl_context *ctx, GLuint name)
 253 {
 254    struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer);
 255    if (strb) {
 256       assert(name != 0);
 257       _mesa_init_renderbuffer(&strb->Base, name);
 258       strb->Base.Delete = st_renderbuffer_delete;
 259       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 260       return &strb->Base;
 261    }
 262    return NULL;
 263 }
 264
 265
 266 /**
 267  * Allocate a renderbuffer for a an on-screen window (not a user-created
 268  * renderbuffer).  The window system code determines the format.
 269  */
 270 struct gl_renderbuffer *
 271 st_new_renderbuffer_fb(enum pipe_format format, int samples, boolean sw)
 272 {
 273    struct st_renderbuffer *strb;
 274
 275    strb = ST_CALLOC_STRUCT(st_renderbuffer);
 276    if (!strb) {
 277       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 278       return NULL;
 279    }
 280
 281    _mesa_init_renderbuffer(&strb->Base, 0);
 282    strb->Base.ClassID = 0x4242; /* just a unique value */
 283    strb->Base.NumSamples = samples;
 284    strb->Base.Format = st_pipe_format_to_mesa_format(format);
 285    strb->Base._BaseFormat = _mesa_get_format_base_format(strb->Base.Format);
 286    strb->software = sw;
 287
 288    switch (format) {
 289    case PIPE_FORMAT_R8G8B8A8_UNORM:
 290    case PIPE_FORMAT_B8G8R8A8_UNORM:
 291    case PIPE_FORMAT_A8R8G8B8_UNORM:
 292       strb->Base.InternalFormat = GL_RGBA8;
 293       break;
 294    case PIPE_FORMAT_R8G8B8X8_UNORM:
 295    case PIPE_FORMAT_B8G8R8X8_UNORM:
 296    case PIPE_FORMAT_X8R8G8B8_UNORM:
 297       strb->Base.InternalFormat = GL_RGB8;
 298       break;
 299    case PIPE_FORMAT_R8G8B8A8_SRGB:
 300    case PIPE_FORMAT_B8G8R8A8_SRGB:
 301    case PIPE_FORMAT_A8R8G8B8_SRGB:
 302       strb->Base.InternalFormat = GL_SRGB8_ALPHA8;
 303       break;
 304    case PIPE_FORMAT_R8G8B8X8_SRGB:
 305    case PIPE_FORMAT_B8G8R8X8_SRGB:
 306    case PIPE_FORMAT_X8R8G8B8_SRGB:
 307       strb->Base.InternalFormat = GL_SRGB8;
 308       break;
 309    case PIPE_FORMAT_B5G5R5A1_UNORM:
 310       strb->Base.InternalFormat = GL_RGB5_A1;
 311       break;
 312    case PIPE_FORMAT_B4G4R4A4_UNORM:
 313       strb->Base.InternalFormat = GL_RGBA4;
 314       break;
 315    case PIPE_FORMAT_B5G6R5_UNORM:
 316       strb->Base.InternalFormat = GL_RGB565;
 317       break;
 318    case PIPE_FORMAT_Z16_UNORM:
 319       strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
 320       break;
 321    case PIPE_FORMAT_Z32_UNORM:
 322       strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
 323       break;
 324    case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 325    case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 326       strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
 327       break;
 328    case PIPE_FORMAT_Z24X8_UNORM:
 329    case PIPE_FORMAT_X8Z24_UNORM:
 330       strb->Base.InternalFormat = GL_DEPTH_COMPONENT24;
 331       break;
 332    case PIPE_FORMAT_S8_UINT:
 333       strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
 334       break;
 335    case PIPE_FORMAT_R16G16B16A16_SNORM:
 336       /* accum buffer */
 337       strb->Base.InternalFormat = GL_RGBA16_SNORM;
 338       break;
 339    case PIPE_FORMAT_R16G16B16A16_UNORM:
 340       strb->Base.InternalFormat = GL_RGBA16;
 341       break;
 342    case PIPE_FORMAT_R8_UNORM:
 343       strb->Base.InternalFormat = GL_R8;
 344       break;
 345    case PIPE_FORMAT_R8G8_UNORM:
 346       strb->Base.InternalFormat = GL_RG8;
 347       break;
 348    case PIPE_FORMAT_R16_UNORM:
 349       strb->Base.InternalFormat = GL_R16;
 350       break;
 351    case PIPE_FORMAT_R16G16_UNORM:
 352       strb->Base.InternalFormat = GL_RG16;
 353       break;
 354    case PIPE_FORMAT_R32G32B32A32_FLOAT:
 355       strb->Base.InternalFormat = GL_RGBA32F;
 356       break;
 357    case PIPE_FORMAT_R16G16B16A16_FLOAT:
 358       strb->Base.InternalFormat = GL_RGBA16F;
 359       break;
 360    default:
 361       _mesa_problem(NULL,
 362                     "Unexpected format %s in st_new_renderbuffer_fb",
 363                     util_format_name(format));
 364       free(strb);
 365       return NULL;
 366    }
 367
 368    /* st-specific methods */
 369    strb->Base.Delete = st_renderbuffer_delete;
 370    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 371
 372    /* surface is allocated in st_renderbuffer_alloc_storage() */
 373    strb->surface = NULL;
 374
 375    return &strb->Base;
 376 }
 377
 378
 379 /**
 380  * Create or update the pipe_surface of a FBO renderbuffer.
 381  * This is usually called after st_finalize_texture.
 382  */
 383 void
 384 st_update_renderbuffer_surface(struct st_context *st,
 385                                struct st_renderbuffer *strb)
 386 {
 387    struct pipe_context *pipe = st->pipe;
 388    struct pipe_resource *resource = strb->texture;
 389    unsigned rtt_width = strb->Base.Width;
 390    unsigned rtt_height = strb->Base.Height;
 391    unsigned rtt_depth = strb->Base.Depth;
 392    /*
 393     * For winsys fbo, it is possible that the renderbuffer is sRGB-capable but
 394     * the format of strb->texture is linear (because we have no control over
 395     * the format).  Check strb->Base.Format instead of strb->texture->format
 396     * to determine if the rb is sRGB-capable.
 397     */
 398    boolean enable_srgb = (st->ctx->Color.sRGBEnabled &&
 399          _mesa_get_format_color_encoding(strb->Base.Format) == GL_SRGB);
 400    enum pipe_format format = (enable_srgb) ?
 401       util_format_srgb(resource->format) :
 402       util_format_linear(resource->format);
 403    unsigned first_layer, last_layer, level;
 404
 405    if (resource->target == PIPE_TEXTURE_1D_ARRAY) {
 406       rtt_depth = rtt_height;
 407       rtt_height = 1;
 408    }
 409
 410    /* find matching mipmap level size */
 411    for (level = 0; level <= resource->last_level; level++) {
 412       if (u_minify(resource->width0, level) == rtt_width &&
 413           u_minify(resource->height0, level) == rtt_height &&
 414           (resource->target != PIPE_TEXTURE_3D ||
 415            u_minify(resource->depth0, level) == rtt_depth)) {
 416          break;
 417       }
 418    }
 419    assert(level <= resource->last_level);
 420
 421    /* determine the layer bounds */
 422    if (strb->rtt_layered) {
 423       first_layer = 0;
 424       last_layer = util_max_layer(strb->texture, level);
 425    }
 426    else {
 427       first_layer =
 428       last_layer = strb->rtt_face + strb->rtt_slice;
 429    }
 430
 431    /* Adjust for texture views */
 432    if (strb->is_rtt && resource->array_size > 1 &&
 433        strb->Base.TexImage->TexObject->Immutable) {
 434       struct gl_texture_object *tex = strb->Base.TexImage->TexObject;
 435       first_layer += tex->MinLayer;
 436       if (!strb->rtt_layered)
 437          last_layer += tex->MinLayer;
 438       else
 439          last_layer = MIN2(first_layer + tex->NumLayers - 1, last_layer);
 440    }
 441
 442    if (!strb->surface ||
 443        strb->surface->texture->nr_samples != strb->Base.NumSamples ||
 444        strb->surface->format != format ||
 445        strb->surface->texture != resource ||
 446        strb->surface->width != rtt_width ||
 447        strb->surface->height != rtt_height ||
 448        strb->surface->u.tex.level != level ||
 449        strb->surface->u.tex.first_layer != first_layer ||
 450        strb->surface->u.tex.last_layer != last_layer) {
 451       /* create a new pipe_surface */
 452       struct pipe_surface surf_tmpl;
 453       memset(&surf_tmpl, 0, sizeof(surf_tmpl));
 454       surf_tmpl.format = format;
 455       surf_tmpl.u.tex.level = level;
 456       surf_tmpl.u.tex.first_layer = first_layer;
 457       surf_tmpl.u.tex.last_layer = last_layer;
 458
 459       pipe_surface_release(pipe, &strb->surface);
 460
 461       strb->surface = pipe->create_surface(pipe, resource, &surf_tmpl);
 462    }
 463 }
 464
 465 /**
 466  * Called by ctx->Driver.RenderTexture
 467  */
 468 static void
 469 st_render_texture(struct gl_context *ctx,
 470                   struct gl_framebuffer *fb,
 471                   struct gl_renderbuffer_attachment *att)
 472 {
 473    struct st_context *st = st_context(ctx);
 474    struct pipe_context *pipe = st->pipe;
 475    struct gl_renderbuffer *rb = att->Renderbuffer;
 476    struct st_renderbuffer *strb = st_renderbuffer(rb);
 477    struct pipe_resource *pt;
 478
 479    if (!st_finalize_texture(ctx, pipe, att->Texture))
 480       return;
 481
 482    pt = st_get_texobj_resource(att->Texture);
 483    assert(pt);
 484
 485    /* point renderbuffer at texobject */
 486    strb->is_rtt = TRUE;
 487    strb->rtt_face = att->CubeMapFace;
 488    strb->rtt_slice = att->Zoffset;
 489    strb->rtt_layered = att->Layered;
 490    pipe_resource_reference(&strb->texture, pt);
 491
 492    st_update_renderbuffer_surface(st, strb);
 493
 494    strb->Base.Format = st_pipe_format_to_mesa_format(pt->format);
 495
 496    /* Invalidate buffer state so that the pipe's framebuffer state
 497     * gets updated.
 498     * That's where the new renderbuffer (which we just created) gets
 499     * passed to the pipe as a (color/depth) render target.
 500     */
 501    st_invalidate_state(ctx, _NEW_BUFFERS);
 502
 503
 504    /* Need to trigger a call to update_framebuffer() since we just
 505     * attached a new renderbuffer.
 506     */
 507    ctx->NewState |= _NEW_BUFFERS;
 508 }
 509
 510
 511 /**
 512  * Called via ctx->Driver.FinishRenderTexture.
 513  */
 514 static void
 515 st_finish_render_texture(struct gl_context *ctx, struct gl_renderbuffer *rb)
 516 {
 517    struct st_renderbuffer *strb = st_renderbuffer(rb);
 518
 519    if (!strb)
 520       return;
 521
 522    strb->is_rtt = FALSE;
 523
 524    /* restore previous framebuffer state */
 525    st_invalidate_state(ctx, _NEW_BUFFERS);
 526 }
 527
 528
 529 /** Debug helper */
 530 static void
 531 st_fbo_invalid(const char *reason)
 532 {
 533    if (MESA_DEBUG_FLAGS & DEBUG_INCOMPLETE_FBO) {
 534       _mesa_debug(NULL, "Invalid FBO: %s\n", reason);
 535    }
 536 }
 537
 538
 539 /**
 540  * Validate a renderbuffer attachment for a particular set of bindings.
 541  */
 542 static GLboolean
 543 st_validate_attachment(struct gl_context *ctx,
 544                        struct pipe_screen *screen,
 545                        const struct gl_renderbuffer_attachment *att,
 546                        unsigned bindings)
 547 {
 548    const struct st_texture_object *stObj = st_texture_object(att->Texture);
 549    enum pipe_format format;
 550    mesa_format texFormat;
 551    GLboolean valid;
 552
 553    /* Sanity check: we must be binding the surface as a (color) render target
 554     * or depth/stencil target.
 555     */
 556    assert(bindings == PIPE_BIND_RENDER_TARGET ||
 557           bindings == PIPE_BIND_DEPTH_STENCIL);
 558
 559    /* Only validate texture attachments for now, since
 560     * st_renderbuffer_alloc_storage makes sure that
 561     * the format is supported.
 562     */
 563    if (att->Type != GL_TEXTURE)
 564       return GL_TRUE;
 565
 566    if (!stObj || !stObj->pt)
 567       return GL_FALSE;
 568
 569    format = stObj->pt->format;
 570    texFormat = att->Renderbuffer->TexImage->TexFormat;
 571
 572    /* If the encoding is sRGB and sRGB rendering cannot be enabled,
 573     * check for linear format support instead.
 574     * Later when we create a surface, we change the format to a linear one. */
 575    if (!ctx->Extensions.EXT_framebuffer_sRGB &&
 576        _mesa_get_format_color_encoding(texFormat) == GL_SRGB) {
 577       const mesa_format linearFormat = _mesa_get_srgb_format_linear(texFormat);
 578       format = st_mesa_format_to_pipe_format(st_context(ctx), linearFormat);
 579    }
 580
 581    valid = screen->is_format_supported(screen, format,
 582                                       PIPE_TEXTURE_2D,
 583                                       stObj->pt->nr_samples, bindings);
 584    if (!valid) {
 585       st_fbo_invalid("Invalid format");
 586    }
 587
 588    return valid;
 589 }
 590
 591
 592 /**
 593  * Check that the framebuffer configuration is valid in terms of what
 594  * the driver can support.
 595  *
 596  * For Gallium we only supports combined Z+stencil, not separate buffers.
 597  */
 598 static void
 599 st_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
 600 {
 601    struct st_context *st = st_context(ctx);
 602    struct pipe_screen *screen = st->pipe->screen;
 603    const struct gl_renderbuffer_attachment *depth =
 604          &fb->Attachment[BUFFER_DEPTH];
 605    const struct gl_renderbuffer_attachment *stencil =
 606          &fb->Attachment[BUFFER_STENCIL];
 607    GLuint i;
 608    enum pipe_format first_format = PIPE_FORMAT_NONE;
 609    boolean mixed_formats =
 610          screen->get_param(screen, PIPE_CAP_MIXED_COLORBUFFER_FORMATS) != 0;
 611
 612    if (depth->Type && stencil->Type && depth->Type != stencil->Type) {
 613       st_fbo_invalid("Different Depth/Stencil buffer formats");
 614       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 615       return;
 616    }
 617    if (depth->Type == GL_RENDERBUFFER_EXT &&
 618        stencil->Type == GL_RENDERBUFFER_EXT &&
 619        depth->Renderbuffer != stencil->Renderbuffer) {
 620       st_fbo_invalid("Separate Depth/Stencil buffers");
 621       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 622       return;
 623    }
 624    if (depth->Type == GL_TEXTURE &&
 625        stencil->Type == GL_TEXTURE &&
 626        depth->Texture != stencil->Texture) {
 627       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 628       st_fbo_invalid("Different Depth/Stencil textures");
 629       return;
 630    }
 631
 632    if (!st_validate_attachment(ctx,
 633                                screen,
 634                                depth,
 635                                PIPE_BIND_DEPTH_STENCIL)) {
 636       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 637       return;
 638    }
 639    if (!st_validate_attachment(ctx,
 640                                screen,
 641                                stencil,
 642                                PIPE_BIND_DEPTH_STENCIL)) {
 643       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 644       return;
 645    }
 646    for (i = 0; i < ctx->Const.MaxColorAttachments; i++) {
 647       struct gl_renderbuffer_attachment *att =
 648             &fb->Attachment[BUFFER_COLOR0 + i];
 649       enum pipe_format format;
 650
 651       if (!st_validate_attachment(ctx,
 652                                   screen,
 653                                   att,
 654                                   PIPE_BIND_RENDER_TARGET)) {
 655          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 656          return;
 657       }
 658
 659       if (!mixed_formats) {
 660          /* Disallow mixed formats. */
 661          if (att->Type != GL_NONE) {
 662             format = st_renderbuffer(att->Renderbuffer)->surface->format;
 663          } else {
 664             continue;
 665          }
 666
 667          if (first_format == PIPE_FORMAT_NONE) {
 668             first_format = format;
 669          } else if (format != first_format) {
 670             fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 671             st_fbo_invalid("Mixed color formats");
 672             return;
 673          }
 674       }
 675    }
 676 }
 677
 678
 679 /**
 680  * Called via glDrawBuffer.
 681  */
 682 static void
 683 st_DrawBuffers(struct gl_context *ctx, GLsizei count, const GLenum *buffers)
 684 {
 685    struct st_context *st = st_context(ctx);
 686    struct gl_framebuffer *fb = ctx->DrawBuffer;
 687    GLuint i;
 688
 689    (void) count;
 690    (void) buffers;
 691
 692    /* add the renderbuffers on demand */
 693    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
 694       gl_buffer_index idx = fb->_ColorDrawBufferIndexes[i];
 695
 696       if (idx >= 0) {
 697          st_manager_add_color_renderbuffer(st, fb, idx);
 698       }
 699    }
 700 }
 701
 702
 703 /**
 704  * Called via glReadBuffer.
 705  */
 706 static void
 707 st_ReadBuffer(struct gl_context *ctx, GLenum buffer)
 708 {
 709    struct st_context *st = st_context(ctx);
 710    struct gl_framebuffer *fb = ctx->ReadBuffer;
 711
 712    (void) buffer;
 713
 714    /* add the renderbuffer on demand */
 715    if (fb->_ColorReadBufferIndex >= 0)
 716       st_manager_add_color_renderbuffer(st, fb, fb->_ColorReadBufferIndex);
 717 }
 718
 719
 720
 721 /**
 722  * Called via ctx->Driver.MapRenderbuffer.
 723  */
 724 static void
 725 st_MapRenderbuffer(struct gl_context *ctx,
 726                    struct gl_renderbuffer *rb,
 727                    GLuint x, GLuint y, GLuint w, GLuint h,
 728                    GLbitfield mode,
 729                    GLubyte **mapOut, GLint *rowStrideOut)
 730 {
 731    struct st_context *st = st_context(ctx);
 732    struct st_renderbuffer *strb = st_renderbuffer(rb);
 733    struct pipe_context *pipe = st->pipe;
 734    const GLboolean invert = rb->Name == 0;
 735    unsigned usage;
 736    GLuint y2;
 737    GLubyte *map;
 738
 739    if (strb->software) {
 740       /* software-allocated renderbuffer (probably an accum buffer) */
 741       if (strb->data) {
 742          GLint bpp = _mesa_get_format_bytes(strb->Base.Format);
 743          GLint stride = _mesa_format_row_stride(strb->Base.Format,
 744                                                 strb->Base.Width);
 745          *mapOut = (GLubyte *) strb->data + y * stride + x * bpp;
 746          *rowStrideOut = stride;
 747       }
 748       else {
 749          *mapOut = NULL;
 750          *rowStrideOut = 0;
 751       }
 752       return;
 753    }
 754
 755    usage = 0x0;
 756    if (mode & GL_MAP_READ_BIT)
 757       usage |= PIPE_TRANSFER_READ;
 758    if (mode & GL_MAP_WRITE_BIT)
 759       usage |= PIPE_TRANSFER_WRITE;
 760    if (mode & GL_MAP_INVALIDATE_RANGE_BIT)
 761       usage |= PIPE_TRANSFER_DISCARD_RANGE;
 762
 763    /* Note: y=0=bottom of buffer while y2=0=top of buffer.
 764     * 'invert' will be true for window-system buffers and false for
 765     * user-allocated renderbuffers and textures.
 766     */
 767    if (invert)
 768       y2 = strb->Base.Height - y - h;
 769    else
 770       y2 = y;
 771
 772     map = pipe_transfer_map(pipe,
 773                             strb->texture,
 774                             strb->surface->u.tex.level,
 775                             strb->surface->u.tex.first_layer,
 776                             usage, x, y2, w, h, &strb->transfer);
 777    if (map) {
 778       if (invert) {
 779          *rowStrideOut = -(int) strb->transfer->stride;
 780          map += (h - 1) * strb->transfer->stride;
 781       }
 782       else {
 783          *rowStrideOut = strb->transfer->stride;
 784       }
 785       *mapOut = map;
 786    }
 787    else {
 788       *mapOut = NULL;
 789       *rowStrideOut = 0;
 790    }
 791 }
 792
 793
 794 /**
 795  * Called via ctx->Driver.UnmapRenderbuffer.
 796  */
 797 static void
 798 st_UnmapRenderbuffer(struct gl_context *ctx,
 799                      struct gl_renderbuffer *rb)
 800 {
 801    struct st_context *st = st_context(ctx);
 802    struct st_renderbuffer *strb = st_renderbuffer(rb);
 803    struct pipe_context *pipe = st->pipe;
 804
 805    if (strb->software) {
 806       /* software-allocated renderbuffer (probably an accum buffer) */
 807       return;
 808    }
 809
 810    pipe_transfer_unmap(pipe, strb->transfer);
 811    strb->transfer = NULL;
 812 }
 813
 814
 815
 816 void st_init_fbo_functions(struct dd_function_table *functions)
 817 {
 818    functions->NewFramebuffer = _mesa_new_framebuffer;
 819    functions->NewRenderbuffer = st_new_renderbuffer;
 820    functions->FramebufferRenderbuffer = _mesa_FramebufferRenderbuffer_sw;
 821    functions->RenderTexture = st_render_texture;
 822    functions->FinishRenderTexture = st_finish_render_texture;
 823    functions->ValidateFramebuffer = st_validate_framebuffer;
 824
 825    functions->DrawBuffers = st_DrawBuffers;
 826    functions->ReadBuffer = st_ReadBuffer;
 827
 828    functions->MapRenderbuffer = st_MapRenderbuffer;
 829    functions->UnmapRenderbuffer = st_UnmapRenderbuffer;
 830 }
 831
 832