src/mesa/state_tracker/st_cb_fbo.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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/renderbuffer.h"
  41
  42 #include "pipe/p_context.h"
  43 #include "pipe/p_defines.h"
  44 #include "pipe/p_inlines.h"
  45 #include "pipe/p_winsys.h"
  46 #include "st_context.h"
  47 #include "st_cb_fbo.h"
  48 #include "st_cb_texture.h"
  49 #include "st_format.h"
  50 #include "st_public.h"
  51 #include "st_texture.h"
  52
  53
  54
  55 /**
  56  * Compute the renderbuffer's Red/Green/EtcBit fields from the pipe format.
  57  */
  58 static int
  59 init_renderbuffer_bits(struct st_renderbuffer *strb,
  60                        enum pipe_format pipeFormat)
  61 {
  62    struct pipe_format_info info;
  63
  64    if (!st_get_format_info( pipeFormat, &info )) {
  65       assert( 0 );
  66    }
  67
  68    strb->Base._ActualFormat = info.base_format;
  69    strb->Base.RedBits = info.red_bits;
  70    strb->Base.GreenBits = info.green_bits;
  71    strb->Base.BlueBits = info.blue_bits;
  72    strb->Base.AlphaBits = info.alpha_bits;
  73    strb->Base.DepthBits = info.depth_bits;
  74    strb->Base.StencilBits = info.stencil_bits;
  75    strb->Base.DataType = st_format_datatype(pipeFormat);
  76
  77    return info.size;
  78 }
  79
  80
  81 /**
  82  * gl_renderbuffer::AllocStorage()
  83  * This is called to allocate the original drawing surface, and
  84  * during window resize.
  85  */
  86 static GLboolean
  87 st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
  88                               GLenum internalFormat,
  89                               GLuint width, GLuint height)
  90 {
  91    struct pipe_context *pipe = ctx->st->pipe;
  92    struct st_renderbuffer *strb = st_renderbuffer(rb);
  93    enum pipe_format pipeFormat;
  94    unsigned flags = (PIPE_BUFFER_USAGE_CPU_WRITE |
  95                      PIPE_BUFFER_USAGE_CPU_READ |
  96                      PIPE_BUFFER_USAGE_GPU_WRITE |
  97                      PIPE_BUFFER_USAGE_GPU_READ);
  98    int ret;
  99
 100    pipe_surface_reference( &strb->surface, NULL );
 101
 102    if (!strb->surface) {
 103       /* first time surface creation */
 104       strb->surface = pipe->winsys->surface_alloc(pipe->winsys);
 105       assert(strb->surface);
 106       assert(strb->surface->refcount);
 107       assert(strb->surface->winsys);
 108       if (!strb->surface)
 109          return GL_FALSE;
 110    }
 111 #if 0
 112    else if (strb->surface->buffer) {
 113       /* release/discard the old surface buffer */
 114       pipe_reference_buffer(pipe, &strb->surface->buffer, NULL);
 115    }
 116 #else
 117    else {
 118       assert(0);
 119    }
 120 #endif
 121    /* Determine surface format here */
 122    if (strb->format != PIPE_FORMAT_NONE) {
 123       assert(strb->format != 0);
 124       /* we'll hit this for front/back color bufs */
 125       pipeFormat = strb->format;
 126    }
 127    else {
 128       pipeFormat = st_choose_renderbuffer_format(pipe, internalFormat);
 129    }
 130
 131    init_renderbuffer_bits(strb, pipeFormat);
 132
 133    ret = pipe->winsys->surface_alloc_storage(pipe->winsys,
 134                                              strb->surface,
 135                                              width,
 136                                              height,
 137                                              pipeFormat,
 138                                              flags);
 139    if (ret || !strb->surface->buffer) {
 140       if (pipeFormat == DEFAULT_ACCUM_PIPE_FORMAT) {
 141          /* Accum buffer.  Try a different surface format.  Since accum
 142           * buffers are s/w only for now, the surface pixel format doesn't
 143           * really matter, only that the buffer is large enough.
 144           */
 145          int sz, mult;
 146          enum pipe_format accum_format;
 147
 148          /* allocate a buffer of (typically) double height to get 64bpp */
 149          accum_format = st_choose_renderbuffer_format(pipe, GL_RGBA);
 150          sz = pf_get_size(accum_format);
 151          mult = pf_get_size(DEFAULT_ACCUM_PIPE_FORMAT) / sz;
 152
 153          ret = pipe->winsys->surface_alloc_storage(pipe->winsys,
 154                                                    strb->surface,
 155                                                    width, height * mult,
 156                                                    accum_format, flags);
 157          if (ret)
 158             return GL_FALSE; /* we've _really_ failed */
 159
 160       }
 161       else {
 162          return GL_FALSE; /* out of memory, try s/w buffer? */
 163       }
 164    }
 165
 166    ASSERT(strb->surface->buffer);
 167    ASSERT(strb->surface->format);
 168    ASSERT(strb->surface->cpp);
 169    ASSERT(strb->surface->width == width);
 170    /*ASSERT(strb->surface->height == height);*/
 171    ASSERT(strb->surface->pitch);
 172
 173    strb->Base.Width  = width;
 174    strb->Base.Height = height;
 175
 176    return GL_TRUE;
 177 }
 178
 179
 180 /**
 181  * gl_renderbuffer::Delete()
 182  */
 183 static void
 184 st_renderbuffer_delete(struct gl_renderbuffer *rb)
 185 {
 186    struct st_renderbuffer *strb = st_renderbuffer(rb);
 187    ASSERT(strb);
 188    if (strb->surface) {
 189       struct pipe_winsys *ws = strb->surface->winsys;
 190       ws->surface_release(ws, &strb->surface);
 191    }
 192    free(strb);
 193 }
 194
 195
 196 /**
 197  * gl_renderbuffer::GetPointer()
 198  */
 199 static void *
 200 null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
 201                  GLint x, GLint y)
 202 {
 203    /* By returning NULL we force all software rendering to go through
 204     * the span routines.
 205     */
 206 #if 0
 207    assert(0);  /* Should never get called with softpipe */
 208 #endif
 209    return NULL;
 210 }
 211
 212
 213 /**
 214  * Called via ctx->Driver.NewFramebuffer()
 215  */
 216 static struct gl_framebuffer *
 217 st_new_framebuffer(GLcontext *ctx, GLuint name)
 218 {
 219    /* XXX not sure we need to subclass gl_framebuffer for pipe */
 220    return _mesa_new_framebuffer(ctx, name);
 221 }
 222
 223
 224 /**
 225  * Called via ctx->Driver.NewRenderbuffer()
 226  */
 227 static struct gl_renderbuffer *
 228 st_new_renderbuffer(GLcontext *ctx, GLuint name)
 229 {
 230    struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
 231    if (strb) {
 232       _mesa_init_renderbuffer(&strb->Base, name);
 233       strb->Base.Delete = st_renderbuffer_delete;
 234       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 235       strb->Base.GetPointer = null_get_pointer;
 236       strb->format = PIPE_FORMAT_NONE;
 237       return &strb->Base;
 238    }
 239    return NULL;
 240 }
 241
 242
 243 /**
 244  * Allocate a renderbuffer for a an on-screen window (not a user-created
 245  * renderbuffer).  The window system code determines the format.
 246  */
 247 struct gl_renderbuffer *
 248 st_new_renderbuffer_fb(enum pipe_format format)
 249 {
 250    struct st_renderbuffer *strb;
 251
 252    strb = CALLOC_STRUCT(st_renderbuffer);
 253    if (!strb) {
 254       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 255       return NULL;
 256    }
 257
 258    _mesa_init_renderbuffer(&strb->Base, 0);
 259    strb->Base.ClassID = 0x4242; /* just a unique value */
 260    strb->format = format;
 261
 262    switch (format) {
 263    case PIPE_FORMAT_A8R8G8B8_UNORM:
 264    case PIPE_FORMAT_B8G8R8A8_UNORM:
 265    case PIPE_FORMAT_X8R8G8B8_UNORM:
 266    case PIPE_FORMAT_B8G8R8X8_UNORM:
 267    case PIPE_FORMAT_A1R5G5B5_UNORM:
 268    case PIPE_FORMAT_A4R4G4B4_UNORM:
 269    case PIPE_FORMAT_R5G6B5_UNORM:
 270       strb->Base.InternalFormat = GL_RGBA;
 271       strb->Base._BaseFormat = GL_RGBA;
 272       break;
 273    case PIPE_FORMAT_Z16_UNORM:
 274       strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
 275       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 276       break;
 277    case PIPE_FORMAT_Z32_UNORM:
 278       strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
 279       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 280       break;
 281    case PIPE_FORMAT_S8Z24_UNORM:
 282    case PIPE_FORMAT_Z24S8_UNORM:
 283    case PIPE_FORMAT_X8Z24_UNORM:
 284    case PIPE_FORMAT_Z24X8_UNORM:
 285       strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
 286       strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 287       break;
 288    case PIPE_FORMAT_S8_UNORM:
 289       strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
 290       strb->Base._BaseFormat = GL_STENCIL_INDEX;
 291       break;
 292    case DEFAULT_ACCUM_PIPE_FORMAT: /*PIPE_FORMAT_R16G16B16A16_SNORM*/
 293       strb->Base.InternalFormat = GL_RGBA16;
 294       strb->Base._BaseFormat = GL_RGBA;
 295       break;
 296    default:
 297       _mesa_problem(NULL,
 298                     "Unexpected format in st_new_renderbuffer_fb");
 299       return NULL;
 300    }
 301
 302    /* st-specific methods */
 303    strb->Base.Delete = st_renderbuffer_delete;
 304    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 305    strb->Base.GetPointer = null_get_pointer;
 306
 307    /* surface is allocated in st_renderbuffer_alloc_storage() */
 308    strb->surface = NULL;
 309
 310    return &strb->Base;
 311 }
 312
 313
 314
 315
 316 /**
 317  * Called via ctx->Driver.BindFramebufferEXT().
 318  */
 319 static void
 320 st_bind_framebuffer(GLcontext *ctx, GLenum target,
 321                     struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 322 {
 323
 324 }
 325
 326 /**
 327  * Called by ctx->Driver.FramebufferRenderbuffer
 328  */
 329 static void
 330 st_framebuffer_renderbuffer(GLcontext *ctx,
 331                             struct gl_framebuffer *fb,
 332                             GLenum attachment,
 333                             struct gl_renderbuffer *rb)
 334 {
 335    /* XXX no need for derivation? */
 336    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 337 }
 338
 339
 340 /**
 341  * Called by ctx->Driver.RenderTexture
 342  */
 343 static void
 344 st_render_texture(GLcontext *ctx,
 345                   struct gl_framebuffer *fb,
 346                   struct gl_renderbuffer_attachment *att)
 347 {
 348    struct st_context *st = ctx->st;
 349    struct st_renderbuffer *strb;
 350    struct gl_renderbuffer *rb;
 351    struct pipe_context *pipe = st->pipe;
 352    struct pipe_screen *screen = pipe->screen;
 353    struct pipe_texture *pt;
 354
 355    assert(!att->Renderbuffer);
 356
 357    /* create new renderbuffer which wraps the texture image */
 358    rb = st_new_renderbuffer(ctx, 0);
 359    if (!rb) {
 360       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
 361       return;
 362    }
 363
 364    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 365    assert(rb->RefCount == 1);
 366    rb->AllocStorage = NULL; /* should not get called */
 367    strb = st_renderbuffer(rb);
 368
 369    /* get the texture for the texture object */
 370    pt = st_get_texobj_texture(att->Texture);
 371    assert(pt);
 372    assert(pt->width[att->TextureLevel]);
 373
 374    rb->Width = pt->width[att->TextureLevel];
 375    rb->Height = pt->height[att->TextureLevel];
 376
 377    /* the renderbuffer's surface is inside the texture */
 378    strb->surface = screen->get_tex_surface(screen, pt,
 379                                            att->CubeMapFace,
 380                                            att->TextureLevel,
 381                                            att->Zoffset,
 382                                            PIPE_BUFFER_USAGE_CPU_READ |
 383                                            PIPE_BUFFER_USAGE_CPU_WRITE |
 384                                            PIPE_BUFFER_USAGE_GPU_READ |
 385                                            PIPE_BUFFER_USAGE_GPU_WRITE);
 386    assert(strb->surface);
 387    assert(screen->is_format_supported(screen, strb->surface->format, PIPE_TEXTURE));
 388    assert(screen->is_format_supported(screen, strb->surface->format, PIPE_SURFACE));
 389
 390    init_renderbuffer_bits(strb, pt->format);
 391
 392    /*
 393    printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
 394           att->Texture, pt, strb->surface, rb->Width, rb->Height);
 395    */
 396
 397    /* Invalidate buffer state so that the pipe's framebuffer state
 398     * gets updated.
 399     * That's where the new renderbuffer (which we just created) gets
 400     * passed to the pipe as a (color/depth) render target.
 401     */
 402    st_invalidate_state(ctx, _NEW_BUFFERS);
 403 }
 404
 405
 406 /**
 407  * Called via ctx->Driver.FinishRenderTexture.
 408  */
 409 static void
 410 st_finish_render_texture(GLcontext *ctx,
 411                          struct gl_renderbuffer_attachment *att)
 412 {
 413    struct pipe_screen *screen = ctx->st->pipe->screen;
 414    struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
 415
 416    assert(strb);
 417
 418    ctx->st->pipe->flush(ctx->st->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 419
 420    screen->tex_surface_release( screen, &strb->surface );
 421
 422    /*
 423    printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
 424    */
 425
 426    _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 427
 428    /* restore previous framebuffer state */
 429    st_invalidate_state(ctx, _NEW_BUFFERS);
 430 }
 431
 432
 433
 434 void st_init_fbo_functions(struct dd_function_table *functions)
 435 {
 436    functions->NewFramebuffer = st_new_framebuffer;
 437    functions->NewRenderbuffer = st_new_renderbuffer;
 438    functions->BindFramebuffer = st_bind_framebuffer;
 439    functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
 440    functions->RenderTexture = st_render_texture;
 441    functions->FinishRenderTexture = st_finish_render_texture;
 442    /* no longer needed by core Mesa, drivers handle resizes...
 443    functions->ResizeBuffers = st_resize_buffers;
 444    */
 445 }