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    const enum pipe_format pipeFormat
  91       = st_choose_pipe_format(pipe, internalFormat, GL_NONE, GL_NONE);
  92    GLuint cpp;
  93    GLbitfield flags = PIPE_SURFACE_FLAG_RENDER; /* want to render to surface */
  94
  95    cpp = init_renderbuffer_bits(strb, pipeFormat);
  96
  97    if (strb->surface && strb->surface->format != pipeFormat) {
  98       /* need to change surface types, free this surface */
  99       pipe_surface_reference(&strb->surface, NULL);
 100       assert(strb->surface == NULL);
 101    }
 102
 103    if (!strb->surface) {
 104       strb->surface = pipe->winsys->surface_alloc(pipe->winsys, pipeFormat);
 105       assert(strb->surface);
 106       if (!strb->surface)
 107          return GL_FALSE;
 108       strb->surface->cpp = cpp;
 109    }
 110
 111    strb->surface->pitch = pipe->winsys->surface_pitch(pipe->winsys, cpp,
 112                                                       width, flags);
 113
 114    /* loop here since mapping is refcounted */
 115    while (strb->surface->map)
 116       pipe_surface_unmap(strb->surface);
 117    if (strb->surface->buffer)
 118       pipe->winsys->buffer_reference(pipe->winsys, &strb->surface->buffer,
 119                                      NULL);
 120
 121    strb->surface->buffer = pipe->winsys->buffer_create(pipe->winsys, 32, 0, 0);
 122    if (!strb->surface->buffer)
 123       return GL_FALSE; /* out of memory, try s/w buffer? */
 124
 125    pipe->winsys->buffer_data(pipe->winsys, strb->surface->buffer,
 126                              strb->surface->pitch * cpp * height, NULL,
 127                              PIPE_BUFFER_USAGE_PIXEL);
 128
 129    ASSERT(strb->surface->buffer);
 130    ASSERT(strb->surface->format);
 131
 132    strb->Base.Width  = strb->surface->width  = width;
 133    strb->Base.Height = strb->surface->height = height;
 134
 135    return GL_TRUE;
 136 }
 137
 138
 139 /**
 140  * gl_renderbuffer::Delete()
 141  */
 142 static void
 143 st_renderbuffer_delete(struct gl_renderbuffer *rb)
 144 {
 145    struct st_renderbuffer *strb = st_renderbuffer(rb);
 146    ASSERT(strb);
 147    if (strb->surface) {
 148       struct pipe_winsys *ws = strb->surface->winsys;
 149       ws->surface_release(ws, &strb->surface);
 150    }
 151    free(strb);
 152 }
 153
 154
 155 /**
 156  * gl_renderbuffer::GetPointer()
 157  */
 158 static void *
 159 null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
 160                  GLint x, GLint y)
 161 {
 162    /* By returning NULL we force all software rendering to go through
 163     * the span routines.
 164     */
 165 #if 0
 166    assert(0);  /* Should never get called with softpipe */
 167 #endif
 168    return NULL;
 169 }
 170
 171
 172 /**
 173  * Called via ctx->Driver.NewFramebuffer()
 174  */
 175 static struct gl_framebuffer *
 176 st_new_framebuffer(GLcontext *ctx, GLuint name)
 177 {
 178    /* XXX not sure we need to subclass gl_framebuffer for pipe */
 179    return _mesa_new_framebuffer(ctx, name);
 180 }
 181
 182
 183 /**
 184  * Called via ctx->Driver.NewRenderbuffer()
 185  */
 186 static struct gl_renderbuffer *
 187 st_new_renderbuffer(GLcontext *ctx, GLuint name)
 188 {
 189    struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
 190    if (strb) {
 191       _mesa_init_renderbuffer(&strb->Base, name);
 192       strb->Base.Delete = st_renderbuffer_delete;
 193       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 194       strb->Base.GetPointer = null_get_pointer;
 195       return &strb->Base;
 196    }
 197    return NULL;
 198 }
 199
 200
 201 /**
 202  * Allocate a renderbuffer for a an on-screen window (not a user-created
 203  * renderbuffer).  The window system code determines the internal format.
 204  */
 205 struct gl_renderbuffer *
 206 st_new_renderbuffer_fb(GLenum intFormat)
 207 {
 208    struct st_renderbuffer *strb;
 209
 210    strb = CALLOC_STRUCT(st_renderbuffer);
 211    if (!strb) {
 212       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 213       return NULL;
 214    }
 215
 216    _mesa_init_renderbuffer(&strb->Base, 0);
 217    strb->Base.ClassID = 0x4242; /* just a unique value */
 218    strb->Base.InternalFormat = intFormat;
 219
 220    switch (intFormat) {
 221    case GL_RGB5:
 222    case GL_RGBA8:
 223    case GL_RGBA16:
 224       strb->Base._BaseFormat = GL_RGBA;
 225       break;
 226    case GL_DEPTH_COMPONENT16:
 227    case GL_DEPTH_COMPONENT32:
 228       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 229       break;
 230    case GL_DEPTH24_STENCIL8_EXT:
 231       strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 232       break;
 233    case GL_STENCIL_INDEX8_EXT:
 234       strb->Base._BaseFormat = GL_STENCIL_INDEX;
 235       break;
 236    default:
 237       _mesa_problem(NULL,
 238                     "Unexpected intFormat in st_new_renderbuffer");
 239       return NULL;
 240    }
 241
 242    /* st-specific methods */
 243    strb->Base.Delete = st_renderbuffer_delete;
 244    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 245    strb->Base.GetPointer = null_get_pointer;
 246
 247    /* surface is allocated in st_renderbuffer_alloc_storage() */
 248    strb->surface = NULL;
 249
 250    return &strb->Base;
 251 }
 252
 253
 254
 255 /**
 256  * Called via ctx->Driver.BindFramebufferEXT().
 257  */
 258 static void
 259 st_bind_framebuffer(GLcontext *ctx, GLenum target,
 260                     struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 261 {
 262
 263 }
 264
 265 /**
 266  * Called by ctx->Driver.FramebufferRenderbuffer
 267  */
 268 static void
 269 st_framebuffer_renderbuffer(GLcontext *ctx,
 270                             struct gl_framebuffer *fb,
 271                             GLenum attachment,
 272                             struct gl_renderbuffer *rb)
 273 {
 274    /* XXX no need for derivation? */
 275    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 276 }
 277
 278
 279 /**
 280  * Called by ctx->Driver.RenderTexture
 281  */
 282 static void
 283 st_render_texture(GLcontext *ctx,
 284                   struct gl_framebuffer *fb,
 285                   struct gl_renderbuffer_attachment *att)
 286 {
 287    struct st_context *st = ctx->st;
 288    struct st_renderbuffer *strb;
 289    struct gl_renderbuffer *rb;
 290    struct pipe_context *pipe = st->pipe;
 291    struct pipe_texture *pt;
 292
 293    assert(!att->Renderbuffer);
 294
 295    /* create new renderbuffer which wraps the texture image */
 296    rb = st_new_renderbuffer(ctx, 0);
 297    if (!rb) {
 298       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
 299       return;
 300    }
 301
 302    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 303    assert(rb->RefCount == 1);
 304    rb->AllocStorage = NULL; /* should not get called */
 305    strb = st_renderbuffer(rb);
 306
 307    /* get the texture for the texture object */
 308    pt = st_get_texobj_texture(att->Texture);
 309    assert(pt);
 310    assert(pt->width[att->TextureLevel]);
 311
 312    rb->Width = pt->width[att->TextureLevel];
 313    rb->Height = pt->height[att->TextureLevel];
 314
 315    /* the renderbuffer's surface is inside the texture */
 316    strb->surface = pipe->get_tex_surface(pipe, pt,
 317                                          att->CubeMapFace,
 318                                          att->TextureLevel,
 319                                          att->Zoffset);
 320    assert(strb->surface);
 321
 322    init_renderbuffer_bits(strb, pt->format);
 323
 324    /*
 325    printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
 326           att->Texture, pt, strb->surface, rb->Width, rb->Height);
 327    */
 328
 329    /* Invalidate buffer state so that the pipe's framebuffer state
 330     * gets updated.
 331     * That's where the new renderbuffer (which we just created) gets
 332     * passed to the pipe as a (color/depth) render target.
 333     */
 334    st_invalidate_state(ctx, _NEW_BUFFERS);
 335 }
 336
 337
 338 /**
 339  * Called via ctx->Driver.FinishRenderTexture.
 340  */
 341 static void
 342 st_finish_render_texture(GLcontext *ctx,
 343                          struct gl_renderbuffer_attachment *att)
 344 {
 345    struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
 346
 347    assert(strb);
 348
 349    ctx->st->pipe->flush(ctx->st->pipe, 0x0);
 350
 351    /*
 352    printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
 353    */
 354
 355    pipe_surface_reference(&strb->surface, NULL);
 356
 357    _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 358
 359    /* restore previous framebuffer state */
 360    st_invalidate_state(ctx, _NEW_BUFFERS);
 361 }
 362
 363
 364
 365 void st_init_fbo_functions(struct dd_function_table *functions)
 366 {
 367    functions->NewFramebuffer = st_new_framebuffer;
 368    functions->NewRenderbuffer = st_new_renderbuffer;
 369    functions->BindFramebuffer = st_bind_framebuffer;
 370    functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
 371    functions->RenderTexture = st_render_texture;
 372    functions->FinishRenderTexture = st_finish_render_texture;
 373    /* no longer needed by core Mesa, drivers handle resizes...
 374    functions->ResizeBuffers = st_resize_buffers;
 375    */
 376 }