2 * Mesa 3-D graphics library
5 * Copyright (C) 2010 LunarG Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 * Chia-I Wu <olv@lunarg.com>
28 #include "util/u_memory.h"
29 #include "util/u_inlines.h"
34 struct xmesa_st_framebuffer {
37 struct pipe_screen *screen;
39 struct st_visual stvis;
41 unsigned texture_width, texture_height, texture_mask;
42 struct pipe_texture *textures[ST_ATTACHMENT_COUNT];
44 struct pipe_surface *display_surface;
47 static INLINE struct xmesa_st_framebuffer *
48 xmesa_st_framebuffer(struct st_framebuffer_iface *stfbi)
50 return (struct xmesa_st_framebuffer *) stfbi->st_manager_private;
54 * Display an attachment to the xlib_drawable of the framebuffer.
57 xmesa_st_framebuffer_display(struct st_framebuffer_iface *stfbi,
58 enum st_attachment_type statt)
60 struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
61 struct pipe_texture *ptex = xstfb->textures[statt];
62 struct pipe_surface *psurf;
67 psurf = xstfb->display_surface;
68 /* (re)allocate the surface for the texture to be displayed */
69 if (!psurf || psurf->texture != ptex) {
70 pipe_surface_reference(&xstfb->display_surface, NULL);
72 psurf = xstfb->screen->get_tex_surface(xstfb->screen,
73 ptex, 0, 0, 0, PIPE_BUFFER_USAGE_CPU_READ);
77 xstfb->display_surface = psurf;
80 xstfb->screen->flush_frontbuffer(xstfb->screen, psurf, &xstfb->buffer->ws);
86 * Copy the contents between the attachments.
89 xmesa_st_framebuffer_copy_textures(struct st_framebuffer_iface *stfbi,
90 enum st_attachment_type src_statt,
91 enum st_attachment_type dst_statt,
92 unsigned x, unsigned y,
93 unsigned width, unsigned height)
95 struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
96 struct pipe_texture *src_ptex = xstfb->textures[src_statt];
97 struct pipe_texture *dst_ptex = xstfb->textures[dst_statt];
98 struct pipe_surface *src, *dst;
99 struct pipe_context *pipe;
101 if (!src_ptex || !dst_ptex)
104 pipe = xstfb->display->pipe;
106 pipe = xstfb->screen->context_create(xstfb->screen, NULL);
109 xstfb->display->pipe = pipe;
112 src = xstfb->screen->get_tex_surface(xstfb->screen,
113 src_ptex, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_READ);
114 dst = xstfb->screen->get_tex_surface(xstfb->screen,
115 dst_ptex, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE);
118 pipe->surface_copy(pipe, dst, x, y, src, x, y, width, height);
120 pipe_surface_reference(&src, NULL);
121 pipe_surface_reference(&dst, NULL);
125 * Remove outdated textures and create the requested ones.
128 xmesa_st_framebuffer_validate_textures(struct st_framebuffer_iface *stfbi,
129 unsigned width, unsigned height,
132 struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
133 struct pipe_texture templ;
136 /* remove outdated textures */
137 if (xstfb->texture_width != width || xstfb->texture_height != height) {
138 for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
139 pipe_texture_reference(&xstfb->textures[i], NULL);
142 memset(&templ, 0, sizeof(templ));
143 templ.target = PIPE_TEXTURE_2D;
144 templ.width0 = width;
145 templ.height0 = height;
147 templ.last_level = 0;
149 for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
150 enum pipe_format format;
153 /* the texture already exists or not requested */
154 if (xstfb->textures[i] || !(mask & (1 << i))) {
155 /* remember the texture */
156 if (xstfb->textures[i])
162 case ST_ATTACHMENT_FRONT_LEFT:
163 case ST_ATTACHMENT_BACK_LEFT:
164 case ST_ATTACHMENT_FRONT_RIGHT:
165 case ST_ATTACHMENT_BACK_RIGHT:
166 format = xstfb->stvis.color_format;
167 tex_usage = PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
168 PIPE_TEXTURE_USAGE_RENDER_TARGET;
170 case ST_ATTACHMENT_DEPTH_STENCIL:
171 format = xstfb->stvis.depth_stencil_format;
172 tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
175 format = PIPE_FORMAT_NONE;
179 if (format != PIPE_FORMAT_NONE) {
180 templ.format = format;
181 templ.tex_usage = tex_usage;
184 xstfb->screen->texture_create(xstfb->screen, &templ);
188 xstfb->texture_width = width;
189 xstfb->texture_height = height;
190 xstfb->texture_mask = mask;
194 xmesa_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
195 const enum st_attachment_type *statts,
197 struct pipe_texture **out)
199 struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
200 unsigned statt_mask, new_mask, i;
204 for (i = 0; i < count; i++)
205 statt_mask |= 1 << statts[i];
206 /* record newly allocated textures */
207 new_mask = statt_mask & ~xstfb->texture_mask;
209 resized = (xstfb->buffer->width != xstfb->texture_width ||
210 xstfb->buffer->height != xstfb->texture_height);
212 /* revalidate textures */
213 if (resized || new_mask) {
214 xmesa_st_framebuffer_validate_textures(stfbi,
215 xstfb->buffer->width, xstfb->buffer->height, statt_mask);
218 enum st_attachment_type back, front;
220 back = ST_ATTACHMENT_BACK_LEFT;
221 front = ST_ATTACHMENT_FRONT_LEFT;
222 /* copy the contents if front is newly allocated and back is not */
223 if ((statt_mask & (1 << back)) &&
224 (new_mask & (1 << front)) &&
225 !(new_mask & (1 << back))) {
226 xmesa_st_framebuffer_copy_textures(stfbi, back, front,
227 0, 0, xstfb->texture_width, xstfb->texture_height);
232 for (i = 0; i < count; i++) {
234 pipe_texture_reference(&out[i], xstfb->textures[statts[i]]);
241 xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
242 enum st_attachment_type statt)
244 struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
247 ret = xmesa_st_framebuffer_display(stfbi, statt);
249 xmesa_check_buffer_size(xstfb->buffer);
254 struct st_framebuffer_iface *
255 xmesa_create_st_framebuffer(XMesaDisplay xmdpy, XMesaBuffer b)
257 struct st_framebuffer_iface *stfbi;
258 struct xmesa_st_framebuffer *xstfb;
260 assert(xmdpy->display == b->xm_visual->display);
262 stfbi = CALLOC_STRUCT(st_framebuffer_iface);
263 xstfb = CALLOC_STRUCT(xmesa_st_framebuffer);
264 if (!stfbi || !xstfb) {
272 xstfb->display = xmdpy;
274 xstfb->screen = xmdpy->screen;
275 xstfb->stvis = b->xm_visual->stvis;
277 stfbi->visual = &xstfb->stvis;
278 stfbi->flush_front = xmesa_st_framebuffer_flush_front;
279 stfbi->validate = xmesa_st_framebuffer_validate;
280 stfbi->st_manager_private = (void *) xstfb;
286 xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
288 struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
291 pipe_surface_reference(&xstfb->display_surface, NULL);
293 for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
294 pipe_texture_reference(&xstfb->textures[i], NULL);
301 xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
303 struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
306 ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
308 struct pipe_texture **front, **back, *tmp;
310 front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
311 back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
312 /* swap textures only if the front texture has been allocated */
319 xmesa_check_buffer_size(xstfb->buffer);
324 xmesa_copy_st_framebuffer(struct st_framebuffer_iface *stfbi,
325 enum st_attachment_type src,
326 enum st_attachment_type dst,
327 int x, int y, int w, int h)
329 xmesa_st_framebuffer_copy_textures(stfbi, src, dst, x, y, w, h);
330 if (dst == ST_ATTACHMENT_FRONT_LEFT)
331 xmesa_st_framebuffer_display(stfbi, dst);