src/mesa/state_tracker/st_atom_framebuffer.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   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "st_context.h"
  35 #include "st_atom.h"
  36 #include "st_cb_bitmap.h"
  37 #include "st_cb_fbo.h"
  38 #include "st_texture.h"
  39 #include "pipe/p_context.h"
  40 #include "cso_cache/cso_context.h"
  41 #include "util/u_math.h"
  42 #include "util/u_inlines.h"
  43 #include "util/u_format.h"
  44
  45
  46 /**
  47  * When doing GL render to texture, we have to be sure that finalize_texture()
  48  * didn't yank out the pipe_resource that we earlier created a surface for.
  49  * Check for that here and create a new surface if needed.
  50  */
  51 static void
  52 update_renderbuffer_surface(struct st_context *st,
  53                             struct st_renderbuffer *strb)
  54 {
  55    struct pipe_context *pipe = st->pipe;
  56    struct pipe_resource *resource = strb->rtt ? strb->rtt->pt : strb->texture;
  57    int rtt_width = strb->Base.Width;
  58    int rtt_height = strb->Base.Height;
  59    enum pipe_format format = st->ctx->Color.sRGBEnabled ? resource->format : util_format_linear(resource->format);
  60
  61    if (!strb->surface ||
  62        strb->surface->format != format ||
  63        strb->surface->texture != resource ||
  64        strb->surface->width != rtt_width ||
  65        strb->surface->height != rtt_height) {
  66       GLuint level;
  67       /* find matching mipmap level size */
  68       for (level = 0; level <= resource->last_level; level++) {
  69          if (u_minify(resource->width0, level) == rtt_width &&
  70              u_minify(resource->height0, level) == rtt_height) {
  71             struct pipe_surface surf_tmpl;
  72             memset(&surf_tmpl, 0, sizeof(surf_tmpl));
  73             surf_tmpl.format = format;
  74             surf_tmpl.u.tex.level = level;
  75             surf_tmpl.u.tex.first_layer = strb->rtt_face + strb->rtt_slice;
  76             surf_tmpl.u.tex.last_layer = strb->rtt_face + strb->rtt_slice;
  77
  78             pipe_surface_reference(&strb->surface, NULL);
  79
  80             strb->surface = pipe->create_surface(pipe,
  81                                                  resource,
  82                                                  &surf_tmpl);
  83 #if 0
  84             printf("-- alloc new surface %d x %d into tex %p\n",
  85                    strb->surface->width, strb->surface->height,
  86                    texture);
  87 #endif
  88             break;
  89          }
  90       }
  91    }
  92 }
  93
  94
  95 /**
  96  * Update framebuffer state (color, depth, stencil, etc. buffers)
  97  */
  98 static void
  99 update_framebuffer_state( struct st_context *st )
 100 {
 101    struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
 102    struct gl_framebuffer *fb = st->ctx->DrawBuffer;
 103    struct st_renderbuffer *strb;
 104    GLuint i;
 105
 106    st_flush_bitmap_cache(st);
 107
 108    st->state.fb_orientation = st_fb_orientation(fb);
 109    framebuffer->width = fb->Width;
 110    framebuffer->height = fb->Height;
 111
 112    /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
 113
 114    /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
 115     * to determine which surfaces to draw to
 116     */
 117    framebuffer->nr_cbufs = 0;
 118    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
 119       strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
 120
 121       if (strb) {
 122          /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/
 123          if (strb->rtt ||
 124              (strb->texture && util_format_is_srgb(strb->texture->format))) {
 125             /* rendering to a GL texture, may have to update surface */
 126             update_renderbuffer_surface(st, strb);
 127          }
 128
 129          if (strb->surface) {
 130             pipe_surface_reference(&framebuffer->cbufs[framebuffer->nr_cbufs],
 131                                    strb->surface);
 132             framebuffer->nr_cbufs++;
 133          }
 134          strb->defined = GL_TRUE; /* we'll be drawing something */
 135       }
 136    }
 137    for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
 138       pipe_surface_reference(&framebuffer->cbufs[i], NULL);
 139    }
 140
 141    /*
 142     * Depth/Stencil renderbuffer/surface.
 143     */
 144    strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
 145    if (strb) {
 146       if (strb->rtt) {
 147          /* rendering to a GL texture, may have to update surface */
 148          update_renderbuffer_surface(st, strb);
 149       }
 150       pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
 151    }
 152    else {
 153       strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
 154       if (strb) {
 155          assert(strb->surface);
 156          pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
 157       }
 158       else
 159          pipe_surface_reference(&framebuffer->zsbuf, NULL);
 160    }
 161
 162 #ifdef DEBUG
 163    /* Make sure the resource binding flags were set properly */
 164    for (i = 0; i < framebuffer->nr_cbufs; i++) {
 165       assert(framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
 166    }
 167    if (framebuffer->zsbuf) {
 168       assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
 169    }
 170 #endif
 171
 172    cso_set_framebuffer(st->cso_context, framebuffer);
 173 }
 174
 175
 176 const struct st_tracked_state st_update_framebuffer = {
 177    "st_update_framebuffer",                             /* name */
 178    {                                                    /* dirty */
 179       _NEW_BUFFERS,                                     /* mesa */
 180       ST_NEW_FRAMEBUFFER,                               /* st */
 181    },
 182    update_framebuffer_state                             /* update */
 183 };
 184