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