1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
30 * Keith Whitwell <keith@tungstengraphics.com>
34 #include "st_context.h"
36 #include "st_cb_fbo.h"
37 #include "st_public.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"
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.
52 update_renderbuffer_surface(struct st_context *st,
53 struct st_renderbuffer *strb)
55 struct pipe_screen *screen = st->pipe->screen;
56 struct pipe_resource *resource = strb->rtt->pt;
57 int rtt_width = strb->Base.Width;
58 int rtt_height = strb->Base.Height;
61 strb->surface->texture != resource ||
62 strb->surface->width != rtt_width ||
63 strb->surface->height != rtt_height) {
65 /* find matching mipmap level size */
66 for (level = 0; level <= resource->last_level; level++) {
67 if (u_minify(resource->width0, level) == rtt_width &&
68 u_minify(resource->height0, level) == rtt_height) {
70 pipe_surface_reference(&strb->surface, NULL);
72 strb->surface = screen->get_tex_surface(screen,
77 PIPE_BIND_RENDER_TARGET |
78 PIPE_BIND_BLIT_SOURCE |
79 PIPE_BIND_BLIT_DESTINATION );
81 printf("-- alloc new surface %d x %d into tex %p\n",
82 strb->surface->width, strb->surface->height,
93 * Update framebuffer state (color, depth, stencil, etc. buffers)
96 update_framebuffer_state( struct st_context *st )
98 struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
99 struct gl_framebuffer *fb = st->ctx->DrawBuffer;
100 struct st_renderbuffer *strb;
103 framebuffer->width = fb->Width;
104 framebuffer->height = fb->Height;
106 /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
108 /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
109 * to determine which surfaces to draw to
111 framebuffer->nr_cbufs = 0;
112 for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
113 strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
116 /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/
118 /* rendering to a GL texture, may have to update surface */
119 update_renderbuffer_surface(st, strb);
123 pipe_surface_reference(&framebuffer->cbufs[framebuffer->nr_cbufs],
125 framebuffer->nr_cbufs++;
127 strb->defined = GL_TRUE; /* we'll be drawing something */
130 for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
131 pipe_surface_reference(&framebuffer->cbufs[i], NULL);
135 * Depth/Stencil renderbuffer/surface.
137 strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
139 strb = st_renderbuffer(strb->Base.Wrapped);
141 /* rendering to a GL texture, may have to update surface */
142 update_renderbuffer_surface(st, strb);
144 pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
147 strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
149 strb = st_renderbuffer(strb->Base.Wrapped);
150 assert(strb->surface);
151 pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
154 pipe_surface_reference(&framebuffer->zsbuf, NULL);
157 cso_set_framebuffer(st->cso_context, framebuffer);
159 if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) {
160 if (st->frontbuffer_status == FRONT_STATUS_COPY_OF_BACK) {
161 /* copy back color buffer to front color buffer */
162 struct st_framebuffer *stfb = (struct st_framebuffer *) fb;
163 struct pipe_surface *surf_front, *surf_back;
164 (void) st_get_framebuffer_surface(stfb, ST_SURFACE_FRONT_LEFT, &surf_front);
165 (void) st_get_framebuffer_surface(stfb, ST_SURFACE_BACK_LEFT, &surf_back);
167 st->pipe->surface_copy(st->pipe,
168 surf_front, 0, 0, /* dest */
169 surf_back, 0, 0, /* src */
170 fb->Width, fb->Height);
172 /* we're assuming we'll really draw to the front buffer */
173 st->frontbuffer_status = FRONT_STATUS_DIRTY;
178 const struct st_tracked_state st_update_framebuffer = {
179 "st_update_framebuffer", /* name */
181 _NEW_BUFFERS, /* mesa */
182 ST_NEW_FRAMEBUFFER, /* st */
184 update_framebuffer_state /* update */