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
update_renderbuffer_surface(struct st_context * st,struct st_renderbuffer * strb)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
update_framebuffer_state(struct st_context * st)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