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