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