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 static INLINE GLboolean pf_is_depth_stencil( enum pipe_format format )
  81 {
  82    return (pf_get_component_bits( format, PIPE_FORMAT_COMP_Z ) +
  83            pf_get_component_bits( format, PIPE_FORMAT_COMP_S )) != 0;
  84 }
  85
  86 /**
  87  * gl_renderbuffer::AllocStorage()
  88  * This is called to allocate the original drawing surface, and
  89  * during window resize.
  90  */
  91 static GLboolean
  92 st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
  93                               GLenum internalFormat,
  94                               GLuint width, GLuint height)
  95 {
  96    struct pipe_context *pipe = ctx->st->pipe;
  97    struct st_renderbuffer *strb = st_renderbuffer(rb);
  98    struct pipe_texture template;
  99    unsigned surface_usage;
 100
 101    /* Free the old surface (and texture if we hold the last
 102     * reference):
 103     */
 104    pipe_surface_reference( &strb->surface, NULL );
 105
 106    memset(&template, 0, sizeof(template));
 107
 108    if (strb->format != PIPE_FORMAT_NONE) {
 109       template.format = strb->format;
 110    }
 111    else {
 112       template.format = st_choose_renderbuffer_format(pipe, internalFormat);
 113    }
 114
 115    strb->Base.Width  = width;
 116    strb->Base.Height = height;
 117    init_renderbuffer_bits(strb, template.format);
 118
 119    template.target = PIPE_TEXTURE_2D;
 120    template.compressed = 0;
 121    template.cpp = pf_get_size(template.format);
 122    template.width[0] = width;
 123    template.height[0] = height;
 124    template.depth[0] = 1;
 125    template.last_level = 0;
 126
 127    if (pf_is_depth_stencil(template.format)) {
 128       template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
 129    }
 130    else {
 131       template.tex_usage = (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 132                             PIPE_TEXTURE_USAGE_RENDER_TARGET);
 133    }
 134
 135
 136    /* Probably need dedicated flags for surface usage too:
 137     */
 138    surface_usage = (PIPE_BUFFER_USAGE_GPU_READ |
 139                     PIPE_BUFFER_USAGE_GPU_WRITE);
 140 #if 0
 141                     PIPE_BUFFER_USAGE_CPU_READ |
 142                     PIPE_BUFFER_USAGE_CPU_WRITE);
 143 #endif
 144
 145    strb->texture = pipe->screen->texture_create( pipe->screen,
 146                                                  &template );
 147
 148    /* Special path for accum buffers.
 149     *
 150     * Try a different surface format.  Since accum buffers are s/w
 151     * only for now, the surface pixel format doesn't really matter,
 152     * only that the buffer is large enough.
 153     */
 154    if (!strb->texture && template.format == DEFAULT_ACCUM_PIPE_FORMAT)
 155    {
 156       /* Actually, just setting this usage value should be sufficient
 157        * to tell the driver to go ahead and allocate the buffer, even
 158        * if HW doesn't support the format.
 159        */
 160       template.tex_usage = 0;
 161       surface_usage = (PIPE_BUFFER_USAGE_CPU_READ |
 162                        PIPE_BUFFER_USAGE_CPU_WRITE);
 163
 164       strb->texture = pipe->screen->texture_create( pipe->screen,
 165                                                     &template );
 166
 167    }
 168
 169    if (!strb->texture)
 170       return FALSE;
 171
 172    strb->surface = pipe->screen->get_tex_surface( pipe->screen,
 173                                                   strb->texture,
 174                                                   0, 0, 0,
 175                                                   surface_usage );
 176
 177    assert(strb->surface->buffer);
 178    assert(strb->surface->format);
 179    assert(strb->surface->cpp);
 180    assert(strb->surface->width == width);
 181    assert(strb->surface->height == height);
 182    assert(strb->surface->pitch);
 183
 184
 185    return strb->surface != NULL;
 186 }
 187
 188
 189 /**
 190  * gl_renderbuffer::Delete()
 191  */
 192 static void
 193 st_renderbuffer_delete(struct gl_renderbuffer *rb)
 194 {
 195    struct st_renderbuffer *strb = st_renderbuffer(rb);
 196    ASSERT(strb);
 197    pipe_surface_reference(&strb->surface, NULL);
 198    pipe_texture_reference(&strb->texture, NULL);
 199    free(strb);
 200 }
 201
 202
 203 /**
 204  * gl_renderbuffer::GetPointer()
 205  */
 206 static void *
 207 null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
 208                  GLint x, GLint y)
 209 {
 210    /* By returning NULL we force all software rendering to go through
 211     * the span routines.
 212     */
 213 #if 0
 214    assert(0);  /* Should never get called with softpipe */
 215 #endif
 216    return NULL;
 217 }
 218
 219
 220 /**
 221  * Called via ctx->Driver.NewFramebuffer()
 222  */
 223 static struct gl_framebuffer *
 224 st_new_framebuffer(GLcontext *ctx, GLuint name)
 225 {
 226    /* XXX not sure we need to subclass gl_framebuffer for pipe */
 227    return _mesa_new_framebuffer(ctx, name);
 228 }
 229
 230
 231 /**
 232  * Called via ctx->Driver.NewRenderbuffer()
 233  */
 234 static struct gl_renderbuffer *
 235 st_new_renderbuffer(GLcontext *ctx, GLuint name)
 236 {
 237    struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
 238    if (strb) {
 239       _mesa_init_renderbuffer(&strb->Base, name);
 240       strb->Base.Delete = st_renderbuffer_delete;
 241       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 242       strb->Base.GetPointer = null_get_pointer;
 243       strb->format = PIPE_FORMAT_NONE;
 244       return &strb->Base;
 245    }
 246    return NULL;
 247 }
 248
 249
 250 /**
 251  * Allocate a renderbuffer for a an on-screen window (not a user-created
 252  * renderbuffer).  The window system code determines the format.
 253  */
 254 struct gl_renderbuffer *
 255 st_new_renderbuffer_fb(enum pipe_format format)
 256 {
 257    struct st_renderbuffer *strb;
 258
 259    strb = CALLOC_STRUCT(st_renderbuffer);
 260    if (!strb) {
 261       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 262       return NULL;
 263    }
 264
 265    _mesa_init_renderbuffer(&strb->Base, 0);
 266    strb->Base.ClassID = 0x4242; /* just a unique value */
 267    strb->format = format;
 268
 269    switch (format) {
 270    case PIPE_FORMAT_A8R8G8B8_UNORM:
 271    case PIPE_FORMAT_B8G8R8A8_UNORM:
 272    case PIPE_FORMAT_X8R8G8B8_UNORM:
 273    case PIPE_FORMAT_B8G8R8X8_UNORM:
 274    case PIPE_FORMAT_A1R5G5B5_UNORM:
 275    case PIPE_FORMAT_A4R4G4B4_UNORM:
 276    case PIPE_FORMAT_R5G6B5_UNORM:
 277       strb->Base.InternalFormat = GL_RGBA;
 278       strb->Base._BaseFormat = GL_RGBA;
 279       break;
 280    case PIPE_FORMAT_Z16_UNORM:
 281       strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
 282       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 283       break;
 284    case PIPE_FORMAT_Z32_UNORM:
 285       strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
 286       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 287       break;
 288    case PIPE_FORMAT_S8Z24_UNORM:
 289    case PIPE_FORMAT_Z24S8_UNORM:
 290    case PIPE_FORMAT_X8Z24_UNORM:
 291    case PIPE_FORMAT_Z24X8_UNORM:
 292       strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
 293       strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 294       break;
 295    case PIPE_FORMAT_S8_UNORM:
 296       strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
 297       strb->Base._BaseFormat = GL_STENCIL_INDEX;
 298       break;
 299    case DEFAULT_ACCUM_PIPE_FORMAT: /*PIPE_FORMAT_R16G16B16A16_SNORM*/
 300       strb->Base.InternalFormat = GL_RGBA16;
 301       strb->Base._BaseFormat = GL_RGBA;
 302       break;
 303    default:
 304       _mesa_problem(NULL,
 305                     "Unexpected format in st_new_renderbuffer_fb");
 306       return NULL;
 307    }
 308
 309    /* st-specific methods */
 310    strb->Base.Delete = st_renderbuffer_delete;
 311    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 312    strb->Base.GetPointer = null_get_pointer;
 313
 314    /* surface is allocated in st_renderbuffer_alloc_storage() */
 315    strb->surface = NULL;
 316
 317    return &strb->Base;
 318 }
 319
 320
 321
 322
 323 /**
 324  * Called via ctx->Driver.BindFramebufferEXT().
 325  */
 326 static void
 327 st_bind_framebuffer(GLcontext *ctx, GLenum target,
 328                     struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 329 {
 330
 331 }
 332
 333 /**
 334  * Called by ctx->Driver.FramebufferRenderbuffer
 335  */
 336 static void
 337 st_framebuffer_renderbuffer(GLcontext *ctx,
 338                             struct gl_framebuffer *fb,
 339                             GLenum attachment,
 340                             struct gl_renderbuffer *rb)
 341 {
 342    /* XXX no need for derivation? */
 343    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 344 }
 345
 346
 347 /**
 348  * Called by ctx->Driver.RenderTexture
 349  */
 350 static void
 351 st_render_texture(GLcontext *ctx,
 352                   struct gl_framebuffer *fb,
 353                   struct gl_renderbuffer_attachment *att)
 354 {
 355    struct st_context *st = ctx->st;
 356    struct st_renderbuffer *strb;
 357    struct gl_renderbuffer *rb;
 358    struct pipe_context *pipe = st->pipe;
 359    struct pipe_screen *screen = pipe->screen;
 360    struct pipe_texture *pt;
 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    pt = st_get_texobj_texture(att->Texture);
 378    assert(pt);
 379    assert(pt->width[att->TextureLevel]);
 380
 381    rb->Width = pt->width[att->TextureLevel];
 382    rb->Height = pt->height[att->TextureLevel];
 383
 384    pipe_texture_reference( &strb->texture, pt );
 385
 386    /* the renderbuffer's surface is inside the texture */
 387    strb->surface = screen->get_tex_surface(screen, pt,
 388                                            att->CubeMapFace,
 389                                            att->TextureLevel,
 390                                            att->Zoffset,
 391                                            PIPE_BUFFER_USAGE_GPU_READ |
 392                                            PIPE_BUFFER_USAGE_GPU_WRITE);
 393    assert(strb->surface);
 394    assert(screen->is_format_supported(screen, strb->surface->format, PIPE_TEXTURE));
 395    assert(screen->is_format_supported(screen, strb->surface->format, PIPE_SURFACE));
 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    screen->tex_surface_release( screen, &strb->surface );
 428
 429    /*
 430    printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
 431    */
 432
 433    _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 434
 435    /* restore previous framebuffer state */
 436    st_invalidate_state(ctx, _NEW_BUFFERS);
 437 }
 438
 439
 440
 441 void st_init_fbo_functions(struct dd_function_table *functions)
 442 {
 443    functions->NewFramebuffer = st_new_framebuffer;
 444    functions->NewRenderbuffer = st_new_renderbuffer;
 445    functions->BindFramebuffer = st_bind_framebuffer;
 446    functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
 447    functions->RenderTexture = st_render_texture;
 448    functions->FinishRenderTexture = st_finish_render_texture;
 449    /* no longer needed by core Mesa, drivers handle resizes...
 450    functions->ResizeBuffers = st_resize_buffers;
 451    */
 452 }