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, uint pipeFormat)
  59 {
  60    struct pipe_format_info info;
  61
  62    if (!st_get_format_info( pipeFormat, &info )) {
  63       assert( 0 );
  64    }
  65
  66    strb->Base._ActualFormat = info.base_format;
  67    strb->Base.RedBits = info.red_bits;
  68    strb->Base.GreenBits = info.green_bits;
  69    strb->Base.BlueBits = info.blue_bits;
  70    strb->Base.AlphaBits = info.alpha_bits;
  71    strb->Base.DepthBits = info.depth_bits;
  72    strb->Base.StencilBits = info.stencil_bits;
  73    strb->Base.DataType = st_format_datatype(pipeFormat);
  74
  75    return info.size;
  76 }
  77
  78
  79 /**
  80  * gl_renderbuffer::AllocStorage()
  81  */
  82 static GLboolean
  83 st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
  84                               GLenum internalFormat,
  85                               GLuint width, GLuint height)
  86 {
  87    struct pipe_context *pipe = ctx->st->pipe;
  88    struct st_renderbuffer *strb = st_renderbuffer(rb);
  89    const uint pipeFormat
  90       = st_choose_pipe_format(pipe, internalFormat, GL_NONE, GL_NONE);
  91    GLuint cpp;
  92    GLbitfield flags = PIPE_SURFACE_FLAG_RENDER; /* want to render to surface */
  93
  94    cpp = init_renderbuffer_bits(strb, pipeFormat);
  95
  96    if (strb->surface && strb->surface->format != pipeFormat) {
  97       /* need to change surface types, free this surface */
  98       pipe_surface_reference(&strb->surface, NULL);
  99       assert(strb->surface == NULL);
 100    }
 101
 102    if (!strb->surface) {
 103       strb->surface = pipe->winsys->surface_alloc(pipe->winsys, pipeFormat);
 104       assert(strb->surface);
 105       if (!strb->surface)
 106          return GL_FALSE;
 107       strb->surface->cpp = cpp;
 108    }
 109
 110    strb->surface->pitch = pipe->winsys->surface_pitch(pipe->winsys, cpp,
 111                                                       width, flags);
 112
 113    /* loop here since mapping is refcounted */
 114    while (strb->surface->map)
 115       pipe_surface_unmap(strb->surface);
 116    if (strb->surface->buffer)
 117       pipe->winsys->buffer_reference(pipe->winsys, &strb->surface->buffer,
 118                                      NULL);
 119
 120    strb->surface->buffer = pipe->winsys->buffer_create(pipe->winsys, flags);
 121    if (!strb->surface->buffer)
 122       return GL_FALSE; /* out of memory, try s/w buffer? */
 123
 124    pipe->winsys->buffer_data(pipe->winsys, strb->surface->buffer,
 125                              strb->surface->pitch * cpp * height, NULL,
 126                              PIPE_BUFFER_USAGE_PIXEL);
 127
 128    ASSERT(strb->surface->buffer);
 129    ASSERT(strb->surface->format);
 130
 131    strb->Base.Width  = strb->surface->width  = width;
 132    strb->Base.Height = strb->surface->height = height;
 133
 134    return GL_TRUE;
 135 }
 136
 137
 138 /**
 139  * gl_renderbuffer::Delete()
 140  */
 141 static void
 142 st_renderbuffer_delete(struct gl_renderbuffer *rb)
 143 {
 144    struct st_renderbuffer *strb = st_renderbuffer(rb);
 145    ASSERT(strb);
 146    if (strb->surface) {
 147       struct pipe_winsys *ws = strb->surface->winsys;
 148       ws->surface_release(ws, &strb->surface);
 149    }
 150    free(strb);
 151 }
 152
 153
 154 /**
 155  * gl_renderbuffer::GetPointer()
 156  */
 157 static void *
 158 null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
 159                  GLint x, GLint y)
 160 {
 161    /* By returning NULL we force all software rendering to go through
 162     * the span routines.
 163     */
 164 #if 0
 165    assert(0);  /* Should never get called with softpipe */
 166 #endif
 167    return NULL;
 168 }
 169
 170
 171 /**
 172  * Called via ctx->Driver.NewFramebuffer()
 173  */
 174 static struct gl_framebuffer *
 175 st_new_framebuffer(GLcontext *ctx, GLuint name)
 176 {
 177    /* XXX not sure we need to subclass gl_framebuffer for pipe */
 178    return _mesa_new_framebuffer(ctx, name);
 179 }
 180
 181
 182 /**
 183  * Called via ctx->Driver.NewRenderbuffer()
 184  */
 185 static struct gl_renderbuffer *
 186 st_new_renderbuffer(GLcontext *ctx, GLuint name)
 187 {
 188    struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
 189    if (strb) {
 190       _mesa_init_renderbuffer(&strb->Base, name);
 191       strb->Base.Delete = st_renderbuffer_delete;
 192       strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 193       strb->Base.GetPointer = null_get_pointer;
 194       return &strb->Base;
 195    }
 196    return NULL;
 197 }
 198
 199
 200 /**
 201  * Allocate a renderbuffer for a an on-screen window (not a user-created
 202  * renderbuffer).  The window system code determines the internal format.
 203  */
 204 struct gl_renderbuffer *
 205 st_new_renderbuffer_fb(GLenum intFormat)
 206 {
 207    struct st_renderbuffer *strb;
 208
 209    strb = CALLOC_STRUCT(st_renderbuffer);
 210    if (!strb) {
 211       _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
 212       return NULL;
 213    }
 214
 215    _mesa_init_renderbuffer(&strb->Base, 0);
 216    strb->Base.ClassID = 0x4242; /* just a unique value */
 217    strb->Base.InternalFormat = intFormat;
 218
 219    switch (intFormat) {
 220    case GL_RGB5:
 221    case GL_RGBA8:
 222    case GL_RGBA16:
 223       strb->Base._BaseFormat = GL_RGBA;
 224       break;
 225    case GL_DEPTH_COMPONENT16:
 226    case GL_DEPTH_COMPONENT32:
 227       strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 228       break;
 229    case GL_DEPTH24_STENCIL8_EXT:
 230       strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 231       break;
 232    case GL_STENCIL_INDEX8_EXT:
 233       strb->Base._BaseFormat = GL_STENCIL_INDEX;
 234       break;
 235    default:
 236       _mesa_problem(NULL,
 237                     "Unexpected intFormat in st_new_renderbuffer");
 238       return NULL;
 239    }
 240
 241    /* st-specific methods */
 242    strb->Base.Delete = st_renderbuffer_delete;
 243    strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
 244    strb->Base.GetPointer = null_get_pointer;
 245
 246    /* surface is allocated in st_renderbuffer_alloc_storage() */
 247    strb->surface = NULL;
 248
 249    return &strb->Base;
 250 }
 251
 252
 253
 254 /**
 255  * Called via ctx->Driver.BindFramebufferEXT().
 256  */
 257 static void
 258 st_bind_framebuffer(GLcontext *ctx, GLenum target,
 259                     struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 260 {
 261
 262 }
 263
 264 /**
 265  * Called by ctx->Driver.FramebufferRenderbuffer
 266  */
 267 static void
 268 st_framebuffer_renderbuffer(GLcontext *ctx,
 269                             struct gl_framebuffer *fb,
 270                             GLenum attachment,
 271                             struct gl_renderbuffer *rb)
 272 {
 273    /* XXX no need for derivation? */
 274    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 275 }
 276
 277
 278 /**
 279  * Called by ctx->Driver.RenderTexture
 280  */
 281 static void
 282 st_render_texture(GLcontext *ctx,
 283                   struct gl_framebuffer *fb,
 284                   struct gl_renderbuffer_attachment *att)
 285 {
 286    struct st_context *st = ctx->st;
 287    struct st_renderbuffer *strb;
 288    struct gl_renderbuffer *rb;
 289    struct pipe_context *pipe = st->pipe;
 290    struct pipe_texture *pt;
 291
 292    assert(!att->Renderbuffer);
 293
 294    /* create new renderbuffer which wraps the texture image */
 295    rb = st_new_renderbuffer(ctx, 0);
 296    if (!rb) {
 297       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
 298       return;
 299    }
 300
 301    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 302    assert(rb->RefCount == 1);
 303    rb->AllocStorage = NULL; /* should not get called */
 304    strb = st_renderbuffer(rb);
 305
 306    /* get the texture for the texture object */
 307    pt = st_get_texobj_texture(att->Texture);
 308    assert(pt);
 309    assert(pt->width[att->TextureLevel]);
 310
 311    rb->Width = pt->width[att->TextureLevel];
 312    rb->Height = pt->height[att->TextureLevel];
 313
 314    /* the renderbuffer's surface is inside the texture */
 315    strb->surface = pipe->get_tex_surface(pipe, pt,
 316                                          att->CubeMapFace,
 317                                          att->TextureLevel,
 318                                          att->Zoffset);
 319    assert(strb->surface);
 320
 321    init_renderbuffer_bits(strb, pt->format);
 322
 323    /*
 324    printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
 325           att->Texture, pt, strb->surface, rb->Width, rb->Height);
 326    */
 327
 328    /* Invalidate buffer state so that the pipe's framebuffer state
 329     * gets updated.
 330     * That's where the new renderbuffer (which we just created) gets
 331     * passed to the pipe as a (color/depth) render target.
 332     */
 333    st_invalidate_state(ctx, _NEW_BUFFERS);
 334 }
 335
 336
 337 /**
 338  * Called via ctx->Driver.FinishRenderTexture.
 339  */
 340 static void
 341 st_finish_render_texture(GLcontext *ctx,
 342                          struct gl_renderbuffer_attachment *att)
 343 {
 344    struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
 345
 346    assert(strb);
 347
 348    ctx->st->pipe->flush(ctx->st->pipe, 0x0);
 349
 350    /*
 351    printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
 352    */
 353
 354    pipe_surface_reference(&strb->surface, NULL);
 355
 356    _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 357
 358    /* restore previous framebuffer state */
 359    st_invalidate_state(ctx, _NEW_BUFFERS);
 360 }
 361
 362
 363
 364 void st_init_fbo_functions(struct dd_function_table *functions)
 365 {
 366    functions->NewFramebuffer = st_new_framebuffer;
 367    functions->NewRenderbuffer = st_new_renderbuffer;
 368    functions->BindFramebuffer = st_bind_framebuffer;
 369    functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
 370    functions->RenderTexture = st_render_texture;
 371    functions->FinishRenderTexture = st_finish_render_texture;
 372    /* no longer needed by core Mesa, drivers handle resizes...
 373    functions->ResizeBuffers = st_resize_buffers;
 374    */
 375 }