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  * gl_renderbuffer::AllocStorage()
  82  * This is called to allocate the original drawing surface, and
  83  * during window resize.
  84  */
  85 static GLboolean
  86 st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
  87                               GLenum internalFormat,
  88                               GLuint width, GLuint height)
  89 {
  90    struct pipe_context *pipe = ctx->st->pipe;
  91    struct st_renderbuffer *strb = st_renderbuffer(rb);
  92    struct pipe_texture template;
  93    unsigned surface_usage;
  94
  95    /* Free the old surface and texture
  96     */
  97    pipe_surface_reference( &strb->surface, NULL );
  98    pipe_texture_reference( &strb->texture, NULL );
  99
 100
 101    memset(&template, 0, sizeof(template));
 102
 103    if (strb->format != PIPE_FORMAT_NONE) {
 104       template.format = strb->format;
 105    }
 106    else {
 107       template.format = st_choose_renderbuffer_format(pipe, internalFormat);
 108    }
 109
 110    strb->Base.Width  = width;
 111    strb->Base.Height = height;
 112    init_renderbuffer_bits(strb, template.format);
 113
 114    template.target = PIPE_TEXTURE_2D;
 115    template.compressed = 0;
 116    pf_get_block(template.format, &template.block);
 117    template.width[0] = width;
 118    template.height[0] = height;
 119    template.depth[0] = 1;
 120    template.last_level = 0;
 121    template.nr_samples = rb->Samples;
 122
 123    if (pf_is_depth_stencil(template.format)) {
 124       template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
 125    }
 126    else {
 127       template.tex_usage = (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 128                             PIPE_TEXTURE_USAGE_RENDER_TARGET);
 129    }
 130
 131
 132    /* Probably need dedicated flags for surface usage too:
 133     */
 134    surface_usage = (PIPE_BUFFER_USAGE_GPU_READ |
 135                     PIPE_BUFFER_USAGE_GPU_WRITE);
 136 #if 0
 137                     PIPE_BUFFER_USAGE_CPU_READ |
 138                     PIPE_BUFFER_USAGE_CPU_WRITE);
 139 #endif
 140
 141    strb->texture = pipe->screen->texture_create( pipe->screen,
 142                                                  &template );
 143
 144    /* Special path for accum buffers.
 145     *
 146     * Try a different surface format.  Since accum buffers are s/w
 147     * only for now, the surface pixel format doesn't really matter,
 148     * only that the buffer is large enough.
 149     */
 150    if (!strb->texture && template.format == DEFAULT_ACCUM_PIPE_FORMAT)
 151    {
 152       /* Actually, just setting this usage value should be sufficient
 153        * to tell the driver to go ahead and allocate the buffer, even
 154        * if HW doesn't support the format.
 155        */
 156       template.tex_usage = 0;
 157       surface_usage = (PIPE_BUFFER_USAGE_CPU_READ |
 158                        PIPE_BUFFER_USAGE_CPU_WRITE);
 159
 160       strb->texture = pipe->screen->texture_create( pipe->screen,
 161                                                     &template );
 162
 163    }
 164
 165    if (!strb->texture)
 166       return FALSE;
 167
 168    strb->surface = pipe->screen->get_tex_surface( pipe->screen,
 169                                                   strb->texture,
 170                                                   0, 0, 0,
 171                                                   surface_usage );
 172
 173    assert(strb->surface->buffer);
 174    assert(strb->surface->format);
 175    assert(strb->surface->block.size);
 176    assert(strb->surface->block.width);
 177    assert(strb->surface->block.height);
 178    assert(strb->surface->width == width);
 179    assert(strb->surface->height == height);
 180    assert(strb->surface->stride);
 181
 182
 183    return strb->surface != NULL;
 184 }
 185
 186
 187 /**
 188  * gl_renderbuffer::Delete()
 189  */
 190 static void
 191 st_renderbuffer_delete(struct gl_renderbuffer *rb)
 192 {
 193    struct st_renderbuffer *strb = st_renderbuffer(rb);
 194    ASSERT(strb);
 195    pipe_surface_reference(&strb->surface, NULL);
 196    pipe_texture_reference(&strb->texture, NULL);
 197    free(strb);
 198 }
 199
 200
 201 /**
 202  * gl_renderbuffer::GetPointer()
 203  */
 204 static void *
 205 null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
 206                  GLint x, GLint y)
 207 {
 208    /* By returning NULL we force all software rendering to go through
 209     * the span routines.
 210     */
 211 #if 0
 212    assert(0);  /* Should never get called with softpipe */
 213 #endif
 214    return NULL;
 215 }
 216
 217
 218 /**
 219  * Called via ctx->Driver.NewFramebuffer()
 220  */
 221 static struct gl_framebuffer *
 222 st_new_framebuffer(GLcontext *ctx, GLuint name)
 223 {
 224    /* XXX not sure we need to subclass gl_framebuffer for pipe */
 225    return _mesa_new_framebuffer(ctx, name);
 226 }
 227
 228
 229 /**
 230  * Called via ctx->Driver.NewRenderbuffer()
 231  */
 232 static struct gl_renderbuffer *
 233 st_new_renderbuffer(GLcontext *ctx, GLuint name)
 234 {
 235    struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
 236    if (strb) {
 237       _mesa_init_renderbuffer(&strb->Base, name);
 238       strb->Base.Delete = st_renderbuffer_delete;
 239       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 240       strb->Base.GetPointer = null_get_pointer;
 241       strb->format = PIPE_FORMAT_NONE;
 242       return &strb->Base;
 243    }
 244    return NULL;
 245 }
 246
 247
 248 /**
 249  * Allocate a renderbuffer for a an on-screen window (not a user-created
 250  * renderbuffer).  The window system code determines the format.
 251  */
 252 struct gl_renderbuffer *
 253 st_new_renderbuffer_fb(enum pipe_format format, int samples)
 254 {
 255    struct st_renderbuffer *strb;
 256
 257    strb = CALLOC_STRUCT(st_renderbuffer);
 258    if (!strb) {
 259       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 260       return NULL;
 261    }
 262
 263    _mesa_init_renderbuffer(&strb->Base, 0);
 264    strb->Base.ClassID = 0x4242; /* just a unique value */
 265    strb->Base.Samples = samples;
 266    strb->format = format;
 267
 268    switch (format) {
 269    case PIPE_FORMAT_A8R8G8B8_UNORM:
 270    case PIPE_FORMAT_B8G8R8A8_UNORM:
 271    case PIPE_FORMAT_X8R8G8B8_UNORM:
 272    case PIPE_FORMAT_B8G8R8X8_UNORM:
 273    case PIPE_FORMAT_A1R5G5B5_UNORM:
 274    case PIPE_FORMAT_A4R4G4B4_UNORM:
 275    case PIPE_FORMAT_R5G6B5_UNORM:
 276       strb->Base.InternalFormat = GL_RGBA;
 277       strb->Base._BaseFormat = GL_RGBA;
 278       break;
 279    case PIPE_FORMAT_Z16_UNORM:
 280       strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
 281       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 282       break;
 283    case PIPE_FORMAT_Z32_UNORM:
 284       strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
 285       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 286       break;
 287    case PIPE_FORMAT_S8Z24_UNORM:
 288    case PIPE_FORMAT_Z24S8_UNORM:
 289    case PIPE_FORMAT_X8Z24_UNORM:
 290    case PIPE_FORMAT_Z24X8_UNORM:
 291       strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
 292       strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 293       break;
 294    case PIPE_FORMAT_S8_UNORM:
 295       strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
 296       strb->Base._BaseFormat = GL_STENCIL_INDEX;
 297       break;
 298    case DEFAULT_ACCUM_PIPE_FORMAT: /*PIPE_FORMAT_R16G16B16A16_SNORM*/
 299       strb->Base.InternalFormat = GL_RGBA16;
 300       strb->Base._BaseFormat = GL_RGBA;
 301       break;
 302    default:
 303       _mesa_problem(NULL,
 304                     "Unexpected format in st_new_renderbuffer_fb");
 305       return NULL;
 306    }
 307
 308    /* st-specific methods */
 309    strb->Base.Delete = st_renderbuffer_delete;
 310    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 311    strb->Base.GetPointer = null_get_pointer;
 312
 313    /* surface is allocated in st_renderbuffer_alloc_storage() */
 314    strb->surface = NULL;
 315
 316    return &strb->Base;
 317 }
 318
 319
 320
 321
 322 /**
 323  * Called via ctx->Driver.BindFramebufferEXT().
 324  */
 325 static void
 326 st_bind_framebuffer(GLcontext *ctx, GLenum target,
 327                     struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 328 {
 329
 330 }
 331
 332 /**
 333  * Called by ctx->Driver.FramebufferRenderbuffer
 334  */
 335 static void
 336 st_framebuffer_renderbuffer(GLcontext *ctx,
 337                             struct gl_framebuffer *fb,
 338                             GLenum attachment,
 339                             struct gl_renderbuffer *rb)
 340 {
 341    /* XXX no need for derivation? */
 342    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 343 }
 344
 345
 346 /**
 347  * Called by ctx->Driver.RenderTexture
 348  */
 349 static void
 350 st_render_texture(GLcontext *ctx,
 351                   struct gl_framebuffer *fb,
 352                   struct gl_renderbuffer_attachment *att)
 353 {
 354    struct st_renderbuffer *strb;
 355    struct gl_renderbuffer *rb;
 356    struct pipe_texture *pt;
 357    struct st_texture_object *stObj;
 358    const struct gl_texture_image *texImage =
 359       att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 360
 361
 362    assert(!att->Renderbuffer);
 363
 364    /* create new renderbuffer which wraps the texture image */
 365    rb = st_new_renderbuffer(ctx, 0);
 366    if (!rb) {
 367       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
 368       return;
 369    }
 370
 371    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 372    assert(rb->RefCount == 1);
 373    rb->AllocStorage = NULL; /* should not get called */
 374    strb = st_renderbuffer(rb);
 375
 376    /* get the texture for the texture object */
 377    stObj = st_texture_object(att->Texture);
 378
 379    /* point renderbuffer at texobject */
 380    strb->rtt = stObj;
 381    strb->rtt_level = att->TextureLevel;
 382    strb->rtt_face = att->CubeMapFace;
 383    strb->rtt_slice = att->Zoffset;
 384
 385    rb->Width = texImage->Width2;
 386    rb->Height = texImage->Height2;
 387    /*printf("***** render to texture level %d: %d x %d\n", att->TextureLevel, rb->Width, rb->Height);*/
 388
 389    pt = st_get_texobj_texture(att->Texture);
 390    assert(pt);
 391    /*printf("***** pipe texture %d x %d\n", pt->width[0], pt->height[0]);*/
 392
 393    pipe_texture_reference( &strb->texture, pt );
 394
 395    pipe_surface_reference(&strb->surface, NULL);
 396
 397    /* the new surface will be created during framebuffer validation */
 398
 399    init_renderbuffer_bits(strb, pt->format);
 400
 401    /*
 402    printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
 403           att->Texture, pt, strb->surface, rb->Width, rb->Height);
 404    */
 405
 406    /* Invalidate buffer state so that the pipe's framebuffer state
 407     * gets updated.
 408     * That's where the new renderbuffer (which we just created) gets
 409     * passed to the pipe as a (color/depth) render target.
 410     */
 411    st_invalidate_state(ctx, _NEW_BUFFERS);
 412 }
 413
 414
 415 /**
 416  * Called via ctx->Driver.FinishRenderTexture.
 417  */
 418 static void
 419 st_finish_render_texture(GLcontext *ctx,
 420                          struct gl_renderbuffer_attachment *att)
 421 {
 422    struct pipe_screen *screen = ctx->st->pipe->screen;
 423    struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
 424
 425    assert(strb);
 426
 427    ctx->st->pipe->flush(ctx->st->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 428
 429    if (strb->surface)
 430       screen->tex_surface_release( screen, &strb->surface );
 431
 432    strb->rtt = NULL;
 433
 434    /*
 435    printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
 436    */
 437
 438    _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 439
 440    /* restore previous framebuffer state */
 441    st_invalidate_state(ctx, _NEW_BUFFERS);
 442 }
 443
 444
 445
 446 void st_init_fbo_functions(struct dd_function_table *functions)
 447 {
 448    functions->NewFramebuffer = st_new_framebuffer;
 449    functions->NewRenderbuffer = st_new_renderbuffer;
 450    functions->BindFramebuffer = st_bind_framebuffer;
 451    functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
 452    functions->RenderTexture = st_render_texture;
 453    functions->FinishRenderTexture = st_finish_render_texture;
 454    /* no longer needed by core Mesa, drivers handle resizes...
 455    functions->ResizeBuffers = st_resize_buffers;
 456    */
 457 }