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
  52
  53
  54 /**
  55  * Compute the renderbuffer's Red/Green/EtcBit fields from the pipe format.
  56  */
  57 static int
  58 init_renderbuffer_bits(struct st_renderbuffer *strb,
  59                        enum pipe_format pipeFormat)
  60 {
  61    struct pipe_format_info info;
  62
  63    if (!st_get_format_info( pipeFormat, &info )) {
  64       assert( 0 );
  65    }
  66
  67    strb->Base._ActualFormat = info.base_format;
  68    strb->Base.RedBits = info.red_bits;
  69    strb->Base.GreenBits = info.green_bits;
  70    strb->Base.BlueBits = info.blue_bits;
  71    strb->Base.AlphaBits = info.alpha_bits;
  72    strb->Base.DepthBits = info.depth_bits;
  73    strb->Base.StencilBits = info.stencil_bits;
  74    strb->Base.DataType = st_format_datatype(pipeFormat);
  75
  76    return info.size;
  77 }
  78
  79
  80 /**
  81  * gl_renderbuffer::AllocStorage()
  82  */
  83 static GLboolean
  84 st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
  85                               GLenum internalFormat,
  86                               GLuint width, GLuint height)
  87 {
  88    struct pipe_context *pipe = ctx->st->pipe;
  89    struct st_renderbuffer *strb = st_renderbuffer(rb);
  90    enum pipe_format pipeFormat;
  91    GLbitfield flags = 0x0; /* XXX needed? */
  92
  93    if (!strb->surface) {
  94       strb->surface = pipe->winsys->surface_alloc(pipe->winsys);
  95       assert(strb->surface);
  96       assert(strb->surface->refcount);
  97       assert(strb->surface->winsys);
  98       if (!strb->surface)
  99          return GL_FALSE;
 100    }
 101
 102    if (strb->surface->buffer)
 103       pipe_buffer_reference(pipe->winsys, &strb->surface->buffer,
 104                             NULL);
 105
 106    /* Determine surface format here */
 107    if (strb->format != PIPE_FORMAT_NONE) {
 108       assert(strb->format != 0);
 109       /* we'll hit this for front/back color bufs */
 110       pipeFormat = strb->format;
 111    }
 112    else {
 113       pipeFormat = st_choose_renderbuffer_format(pipe, internalFormat);
 114    }
 115
 116    init_renderbuffer_bits(strb, pipeFormat);
 117
 118    pipe->winsys->surface_alloc_storage(pipe->winsys,
 119                                        strb->surface,
 120                                        width,
 121                                        height,
 122                                        pipeFormat,
 123                                        flags);
 124    if (!strb->surface->buffer)
 125       return GL_FALSE; /* out of memory, try s/w buffer? */
 126
 127    ASSERT(strb->surface->buffer);
 128    ASSERT(strb->surface->format);
 129    ASSERT(strb->surface->cpp);
 130    ASSERT(strb->surface->width == width);
 131    ASSERT(strb->surface->height == height);
 132    ASSERT(strb->surface->pitch);
 133
 134    strb->Base.Width  = width;
 135    strb->Base.Height = height;
 136
 137    return GL_TRUE;
 138 }
 139
 140
 141 /**
 142  * gl_renderbuffer::Delete()
 143  */
 144 static void
 145 st_renderbuffer_delete(struct gl_renderbuffer *rb)
 146 {
 147    struct st_renderbuffer *strb = st_renderbuffer(rb);
 148    ASSERT(strb);
 149    if (strb->surface) {
 150       struct pipe_winsys *ws = strb->surface->winsys;
 151       ws->surface_release(ws, &strb->surface);
 152    }
 153    free(strb);
 154 }
 155
 156
 157 /**
 158  * gl_renderbuffer::GetPointer()
 159  */
 160 static void *
 161 null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
 162                  GLint x, GLint y)
 163 {
 164    /* By returning NULL we force all software rendering to go through
 165     * the span routines.
 166     */
 167 #if 0
 168    assert(0);  /* Should never get called with softpipe */
 169 #endif
 170    return NULL;
 171 }
 172
 173
 174 /**
 175  * Called via ctx->Driver.NewFramebuffer()
 176  */
 177 static struct gl_framebuffer *
 178 st_new_framebuffer(GLcontext *ctx, GLuint name)
 179 {
 180    /* XXX not sure we need to subclass gl_framebuffer for pipe */
 181    return _mesa_new_framebuffer(ctx, name);
 182 }
 183
 184
 185 /**
 186  * Called via ctx->Driver.NewRenderbuffer()
 187  */
 188 static struct gl_renderbuffer *
 189 st_new_renderbuffer(GLcontext *ctx, GLuint name)
 190 {
 191    struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
 192    if (strb) {
 193       _mesa_init_renderbuffer(&strb->Base, name);
 194       strb->Base.Delete = st_renderbuffer_delete;
 195       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 196       strb->Base.GetPointer = null_get_pointer;
 197       strb->format = PIPE_FORMAT_NONE;
 198       return &strb->Base;
 199    }
 200    return NULL;
 201 }
 202
 203
 204 /**
 205  * Allocate a renderbuffer for a an on-screen window (not a user-created
 206  * renderbuffer).  The window system code determines the format.
 207  */
 208 struct gl_renderbuffer *
 209 st_new_renderbuffer_fb(enum pipe_format format)
 210 {
 211    struct st_renderbuffer *strb;
 212
 213    strb = CALLOC_STRUCT(st_renderbuffer);
 214    if (!strb) {
 215       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 216       return NULL;
 217    }
 218
 219    _mesa_init_renderbuffer(&strb->Base, 0);
 220    strb->Base.ClassID = 0x4242; /* just a unique value */
 221    strb->format = format;
 222
 223    switch (format) {
 224    case PIPE_FORMAT_A8R8G8B8_UNORM:
 225    case PIPE_FORMAT_B8G8R8A8_UNORM:
 226    case PIPE_FORMAT_A1R5G5B5_UNORM:
 227    case PIPE_FORMAT_A4R4G4B4_UNORM:
 228    case PIPE_FORMAT_R5G6B5_UNORM:
 229       strb->Base.InternalFormat = GL_RGBA;
 230       strb->Base._BaseFormat = GL_RGBA;
 231       break;
 232    case PIPE_FORMAT_Z16_UNORM:
 233       strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
 234       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 235       break;
 236    case PIPE_FORMAT_Z32_UNORM:
 237       strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
 238       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 239       break;
 240    case PIPE_FORMAT_S8Z24_UNORM:
 241    case PIPE_FORMAT_Z24S8_UNORM:
 242       strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
 243       strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 244       break;
 245    case PIPE_FORMAT_S8_UNORM:
 246       strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
 247       strb->Base._BaseFormat = GL_STENCIL_INDEX;
 248       break;
 249    case PIPE_FORMAT_R16G16B16A16_SNORM:
 250       strb->Base.InternalFormat = GL_RGBA16;
 251       strb->Base._BaseFormat = GL_RGBA;
 252       break;
 253    default:
 254       _mesa_problem(NULL,
 255                     "Unexpected format in st_new_renderbuffer_fb");
 256       return NULL;
 257    }
 258
 259    /* st-specific methods */
 260    strb->Base.Delete = st_renderbuffer_delete;
 261    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 262    strb->Base.GetPointer = null_get_pointer;
 263
 264    /* surface is allocated in st_renderbuffer_alloc_storage() */
 265    strb->surface = NULL;
 266
 267    return &strb->Base;
 268 }
 269
 270
 271
 272
 273 /**
 274  * Called via ctx->Driver.BindFramebufferEXT().
 275  */
 276 static void
 277 st_bind_framebuffer(GLcontext *ctx, GLenum target,
 278                     struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 279 {
 280
 281 }
 282
 283 /**
 284  * Called by ctx->Driver.FramebufferRenderbuffer
 285  */
 286 static void
 287 st_framebuffer_renderbuffer(GLcontext *ctx,
 288                             struct gl_framebuffer *fb,
 289                             GLenum attachment,
 290                             struct gl_renderbuffer *rb)
 291 {
 292    /* XXX no need for derivation? */
 293    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 294 }
 295
 296
 297 /**
 298  * Called by ctx->Driver.RenderTexture
 299  */
 300 static void
 301 st_render_texture(GLcontext *ctx,
 302                   struct gl_framebuffer *fb,
 303                   struct gl_renderbuffer_attachment *att)
 304 {
 305    struct st_context *st = ctx->st;
 306    struct st_renderbuffer *strb;
 307    struct gl_renderbuffer *rb;
 308    struct pipe_context *pipe = st->pipe;
 309    struct pipe_texture *pt;
 310
 311    assert(!att->Renderbuffer);
 312
 313    /* create new renderbuffer which wraps the texture image */
 314    rb = st_new_renderbuffer(ctx, 0);
 315    if (!rb) {
 316       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
 317       return;
 318    }
 319
 320    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 321    assert(rb->RefCount == 1);
 322    rb->AllocStorage = NULL; /* should not get called */
 323    strb = st_renderbuffer(rb);
 324
 325    /* get the texture for the texture object */
 326    pt = st_get_texobj_texture(att->Texture);
 327    assert(pt);
 328    assert(pt->width[att->TextureLevel]);
 329
 330    rb->Width = pt->width[att->TextureLevel];
 331    rb->Height = pt->height[att->TextureLevel];
 332
 333    /* the renderbuffer's surface is inside the texture */
 334    strb->surface = pipe->get_tex_surface(pipe, pt,
 335                                          att->CubeMapFace,
 336                                          att->TextureLevel,
 337                                          att->Zoffset);
 338    assert(strb->surface);
 339
 340    init_renderbuffer_bits(strb, pt->format);
 341
 342    /*
 343    printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
 344           att->Texture, pt, strb->surface, rb->Width, rb->Height);
 345    */
 346
 347    /* Invalidate buffer state so that the pipe's framebuffer state
 348     * gets updated.
 349     * That's where the new renderbuffer (which we just created) gets
 350     * passed to the pipe as a (color/depth) render target.
 351     */
 352    st_invalidate_state(ctx, _NEW_BUFFERS);
 353 }
 354
 355
 356 /**
 357  * Called via ctx->Driver.FinishRenderTexture.
 358  */
 359 static void
 360 st_finish_render_texture(GLcontext *ctx,
 361                          struct gl_renderbuffer_attachment *att)
 362 {
 363    struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
 364
 365    assert(strb);
 366
 367    ctx->st->pipe->flush(ctx->st->pipe, PIPE_FLUSH_RENDER_CACHE);
 368
 369    /*
 370    printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
 371    */
 372
 373    pipe_surface_reference(&strb->surface, NULL);
 374
 375    _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 376
 377    /* restore previous framebuffer state */
 378    st_invalidate_state(ctx, _NEW_BUFFERS);
 379 }
 380
 381
 382
 383 void st_init_fbo_functions(struct dd_function_table *functions)
 384 {
 385    functions->NewFramebuffer = st_new_framebuffer;
 386    functions->NewRenderbuffer = st_new_renderbuffer;
 387    functions->BindFramebuffer = st_bind_framebuffer;
 388    functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
 389    functions->RenderTexture = st_render_texture;
 390    functions->FinishRenderTexture = st_finish_render_texture;
 391    /* no longer needed by core Mesa, drivers handle resizes...
 392    functions->ResizeBuffers = st_resize_buffers;
 393    */
 394 }