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      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 (at) 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.usage = PIPE_BIND_RENDER_TARGET;
     75             surf_tmpl.u.tex.level = level;
     76             surf_tmpl.u.tex.first_layer = strb->rtt_face + strb->rtt_slice;
     77             surf_tmpl.u.tex.last_layer = strb->rtt_face + strb->rtt_slice;
     78 
     79             pipe_surface_reference(&strb->surface, NULL);
     80 
     81             strb->surface = pipe->create_surface(pipe,
     82                                                  resource,
     83                                                  &surf_tmpl);
     84 #if 0
     85             printf("-- alloc new surface %d x %d into tex %p\n",
     86                    strb->surface->width, strb->surface->height,
     87                    texture);
     88 #endif
     89             break;
     90          }
     91       }
     92    }
     93 }
     94 
     95 
     96 /**
     97  * Update framebuffer state (color, depth, stencil, etc. buffers)
     98  */
     99 static void
    100 update_framebuffer_state( struct st_context *st )
    101 {
    102    struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
    103    struct gl_framebuffer *fb = st->ctx->DrawBuffer;
    104    struct st_renderbuffer *strb;
    105    GLuint i;
    106 
    107    st_flush_bitmap_cache(st);
    108 
    109    st->state.fb_orientation = st_fb_orientation(fb);
    110    framebuffer->width = fb->Width;
    111    framebuffer->height = fb->Height;
    112 
    113    /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
    114 
    115    /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
    116     * to determine which surfaces to draw to
    117     */
    118    framebuffer->nr_cbufs = 0;
    119    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
    120       strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
    121 
    122       if (strb) {
    123          /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/
    124          if (strb->rtt ||
    125              (strb->texture && util_format_is_srgb(strb->texture->format))) {
    126             /* rendering to a GL texture, may have to update surface */
    127             update_renderbuffer_surface(st, strb);
    128          }
    129 
    130          if (strb->surface) {
    131             pipe_surface_reference(&framebuffer->cbufs[framebuffer->nr_cbufs],
    132                                    strb->surface);
    133             framebuffer->nr_cbufs++;
    134          }
    135          strb->defined = GL_TRUE; /* we'll be drawing something */
    136       }
    137    }
    138    for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
    139       pipe_surface_reference(&framebuffer->cbufs[i], NULL);
    140    }
    141 
    142    /*
    143     * Depth/Stencil renderbuffer/surface.
    144     */
    145    strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
    146    if (strb) {
    147       if (strb->rtt) {
    148          /* rendering to a GL texture, may have to update surface */
    149          update_renderbuffer_surface(st, strb);
    150       }
    151       pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
    152    }
    153    else {
    154       strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
    155       if (strb) {
    156          assert(strb->surface);
    157          pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
    158       }
    159       else
    160          pipe_surface_reference(&framebuffer->zsbuf, NULL);
    161    }
    162 
    163 #ifdef DEBUG
    164    /* Make sure the resource binding flags were set properly */
    165    for (i = 0; i < framebuffer->nr_cbufs; i++) {
    166       assert(framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
    167    }
    168    if (framebuffer->zsbuf) {
    169       assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
    170    }
    171 #endif
    172 
    173    cso_set_framebuffer(st->cso_context, framebuffer);
    174 }
    175 
    176 
    177 const struct st_tracked_state st_update_framebuffer = {
    178    "st_update_framebuffer",				/* name */
    179    {							/* dirty */
    180       _NEW_BUFFERS,					/* mesa */
    181       ST_NEW_FRAMEBUFFER,				/* st */
    182    },
    183    update_framebuffer_state				/* update */
    184 };
    185 
    186