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