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  */
  84 static GLboolean
  85 st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
  86                               GLenum internalFormat,
  87                               GLuint width, GLuint height)
  88 {
  89    struct pipe_context *pipe = ctx->st->pipe;
  90    struct st_renderbuffer *strb = st_renderbuffer(rb);
  91    enum pipe_format pipeFormat;
  92    GLbitfield flags = 0x0; /* XXX needed? */
  93
  94    if (!strb->surface) {
  95       strb->surface = pipe->winsys->surface_alloc(pipe->winsys);
  96       assert(strb->surface);
  97       assert(strb->surface->refcount);
  98       assert(strb->surface->winsys);
  99       if (!strb->surface)
 100          return GL_FALSE;
 101    }
 102
 103    if (strb->surface->buffer)
 104       pipe_buffer_reference(pipe->winsys, &strb->surface->buffer,
 105                             NULL);
 106
 107    /* Determine surface format here */
 108    if (strb->format != PIPE_FORMAT_NONE) {
 109       assert(strb->format != 0);
 110       /* we'll hit this for front/back color bufs */
 111       pipeFormat = strb->format;
 112    }
 113    else {
 114       pipeFormat = st_choose_renderbuffer_format(pipe, internalFormat);
 115    }
 116
 117    init_renderbuffer_bits(strb, pipeFormat);
 118
 119    pipe->winsys->surface_alloc_storage(pipe->winsys,
 120                                        strb->surface,
 121                                        width,
 122                                        height,
 123                                        pipeFormat,
 124                                        flags);
 125    if (!strb->surface->buffer)
 126       return GL_FALSE; /* out of memory, try s/w buffer? */
 127
 128    ASSERT(strb->surface->buffer);
 129    ASSERT(strb->surface->format);
 130    ASSERT(strb->surface->cpp);
 131    ASSERT(strb->surface->width == width);
 132    ASSERT(strb->surface->height == height);
 133    ASSERT(strb->surface->pitch);
 134
 135    strb->Base.Width  = width;
 136    strb->Base.Height = height;
 137
 138    return GL_TRUE;
 139 }
 140
 141
 142 /**
 143  * gl_renderbuffer::Delete()
 144  */
 145 static void
 146 st_renderbuffer_delete(struct gl_renderbuffer *rb)
 147 {
 148    struct st_renderbuffer *strb = st_renderbuffer(rb);
 149    ASSERT(strb);
 150    if (strb->surface) {
 151       struct pipe_winsys *ws = strb->surface->winsys;
 152       ws->surface_release(ws, &strb->surface);
 153    }
 154    free(strb);
 155 }
 156
 157
 158 /**
 159  * gl_renderbuffer::GetPointer()
 160  */
 161 static void *
 162 null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
 163                  GLint x, GLint y)
 164 {
 165    /* By returning NULL we force all software rendering to go through
 166     * the span routines.
 167     */
 168 #if 0
 169    assert(0);  /* Should never get called with softpipe */
 170 #endif
 171    return NULL;
 172 }
 173
 174
 175 /**
 176  * Called via ctx->Driver.NewFramebuffer()
 177  */
 178 static struct gl_framebuffer *
 179 st_new_framebuffer(GLcontext *ctx, GLuint name)
 180 {
 181    /* XXX not sure we need to subclass gl_framebuffer for pipe */
 182    return _mesa_new_framebuffer(ctx, name);
 183 }
 184
 185
 186 /**
 187  * Called via ctx->Driver.NewRenderbuffer()
 188  */
 189 static struct gl_renderbuffer *
 190 st_new_renderbuffer(GLcontext *ctx, GLuint name)
 191 {
 192    struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
 193    if (strb) {
 194       _mesa_init_renderbuffer(&strb->Base, name);
 195       strb->Base.Delete = st_renderbuffer_delete;
 196       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 197       strb->Base.GetPointer = null_get_pointer;
 198       strb->format = PIPE_FORMAT_NONE;
 199       return &strb->Base;
 200    }
 201    return NULL;
 202 }
 203
 204
 205 /**
 206  * Allocate a renderbuffer for a an on-screen window (not a user-created
 207  * renderbuffer).  The window system code determines the format.
 208  */
 209 struct gl_renderbuffer *
 210 st_new_renderbuffer_fb(enum pipe_format format)
 211 {
 212    struct st_renderbuffer *strb;
 213
 214    strb = CALLOC_STRUCT(st_renderbuffer);
 215    if (!strb) {
 216       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 217       return NULL;
 218    }
 219
 220    _mesa_init_renderbuffer(&strb->Base, 0);
 221    strb->Base.ClassID = 0x4242; /* just a unique value */
 222    strb->format = format;
 223
 224    switch (format) {
 225    case PIPE_FORMAT_A8R8G8B8_UNORM:
 226    case PIPE_FORMAT_B8G8R8A8_UNORM:
 227    case PIPE_FORMAT_A1R5G5B5_UNORM:
 228    case PIPE_FORMAT_A4R4G4B4_UNORM:
 229    case PIPE_FORMAT_R5G6B5_UNORM:
 230       strb->Base.InternalFormat = GL_RGBA;
 231       strb->Base._BaseFormat = GL_RGBA;
 232       break;
 233    case PIPE_FORMAT_Z16_UNORM:
 234       strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
 235       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 236       break;
 237    case PIPE_FORMAT_Z32_UNORM:
 238       strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
 239       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 240       break;
 241    case PIPE_FORMAT_S8Z24_UNORM:
 242    case PIPE_FORMAT_Z24S8_UNORM:
 243       strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
 244       strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 245       break;
 246    case PIPE_FORMAT_S8_UNORM:
 247       strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
 248       strb->Base._BaseFormat = GL_STENCIL_INDEX;
 249       break;
 250    case PIPE_FORMAT_R16G16B16A16_SNORM:
 251       strb->Base.InternalFormat = GL_RGBA16;
 252       strb->Base._BaseFormat = GL_RGBA;
 253       break;
 254    default:
 255       _mesa_problem(NULL,
 256                     "Unexpected format in st_new_renderbuffer_fb");
 257       return NULL;
 258    }
 259
 260    /* st-specific methods */
 261    strb->Base.Delete = st_renderbuffer_delete;
 262    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 263    strb->Base.GetPointer = null_get_pointer;
 264
 265    /* surface is allocated in st_renderbuffer_alloc_storage() */
 266    strb->surface = NULL;
 267
 268    return &strb->Base;
 269 }
 270
 271
 272
 273
 274 /**
 275  * Called via ctx->Driver.BindFramebufferEXT().
 276  */
 277 static void
 278 st_bind_framebuffer(GLcontext *ctx, GLenum target,
 279                     struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 280 {
 281
 282 }
 283
 284 /**
 285  * Called by ctx->Driver.FramebufferRenderbuffer
 286  */
 287 static void
 288 st_framebuffer_renderbuffer(GLcontext *ctx,
 289                             struct gl_framebuffer *fb,
 290                             GLenum attachment,
 291                             struct gl_renderbuffer *rb)
 292 {
 293    /* XXX no need for derivation? */
 294    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 295 }
 296
 297
 298 /**
 299  * Called by ctx->Driver.RenderTexture
 300  */
 301 static void
 302 st_render_texture(GLcontext *ctx,
 303                   struct gl_framebuffer *fb,
 304                   struct gl_renderbuffer_attachment *att)
 305 {
 306    struct st_context *st = ctx->st;
 307    struct st_renderbuffer *strb;
 308    struct gl_renderbuffer *rb;
 309    struct pipe_context *pipe = st->pipe;
 310    struct pipe_screen *screen = pipe->screen;
 311    struct pipe_texture *pt;
 312
 313    assert(!att->Renderbuffer);
 314
 315    /* create new renderbuffer which wraps the texture image */
 316    rb = st_new_renderbuffer(ctx, 0);
 317    if (!rb) {
 318       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
 319       return;
 320    }
 321
 322    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 323    assert(rb->RefCount == 1);
 324    rb->AllocStorage = NULL; /* should not get called */
 325    strb = st_renderbuffer(rb);
 326
 327    /* get the texture for the texture object */
 328    pt = st_get_texobj_texture(att->Texture);
 329    assert(pt);
 330    assert(pt->width[att->TextureLevel]);
 331
 332    rb->Width = pt->width[att->TextureLevel];
 333    rb->Height = pt->height[att->TextureLevel];
 334
 335    /* the renderbuffer's surface is inside the texture */
 336    strb->surface = screen->get_tex_surface(screen, pt,
 337                                            att->CubeMapFace,
 338                                            att->TextureLevel,
 339                                            att->Zoffset);
 340    assert(strb->surface);
 341
 342    init_renderbuffer_bits(strb, pt->format);
 343
 344    /*
 345    printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
 346           att->Texture, pt, strb->surface, rb->Width, rb->Height);
 347    */
 348
 349    /* Invalidate buffer state so that the pipe's framebuffer state
 350     * gets updated.
 351     * That's where the new renderbuffer (which we just created) gets
 352     * passed to the pipe as a (color/depth) render target.
 353     */
 354    st_invalidate_state(ctx, _NEW_BUFFERS);
 355 }
 356
 357
 358 /**
 359  * Called via ctx->Driver.FinishRenderTexture.
 360  */
 361 static void
 362 st_finish_render_texture(GLcontext *ctx,
 363                          struct gl_renderbuffer_attachment *att)
 364 {
 365    struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
 366
 367    assert(strb);
 368
 369    ctx->st->pipe->flush(ctx->st->pipe, PIPE_FLUSH_RENDER_CACHE);
 370
 371    /*
 372    printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
 373    */
 374
 375    pipe_surface_reference(&strb->surface, NULL);
 376
 377    _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 378
 379    /* restore previous framebuffer state */
 380    st_invalidate_state(ctx, _NEW_BUFFERS);
 381 }
 382
 383
 384
 385 void st_init_fbo_functions(struct dd_function_table *functions)
 386 {
 387    functions->NewFramebuffer = st_new_framebuffer;
 388    functions->NewRenderbuffer = st_new_renderbuffer;
 389    functions->BindFramebuffer = st_bind_framebuffer;
 390    functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
 391    functions->RenderTexture = st_render_texture;
 392    functions->FinishRenderTexture = st_finish_render_texture;
 393    /* no longer needed by core Mesa, drivers handle resizes...
 394    functions->ResizeBuffers = st_resize_buffers;
 395    */
 396 }