1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2010 LunarG Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Chia-I Wu <olv@lunarg.com>
26 */
27
28 #include "util/u_memory.h"
29 #include "util/u_inlines.h"
30 #include "util/u_atomic.h"
31 #include "state_tracker/st_gl_api.h" /* for st_gl_api_create */
32
33 #include "stw_st.h"
34 #include "stw_device.h"
35 #include "stw_framebuffer.h"
36 #include "stw_pixelformat.h"
37
38 struct stw_st_framebuffer {
39 struct st_framebuffer_iface base;
40
41 struct stw_framebuffer *fb;
42 struct st_visual stvis;
43
44 struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
45 unsigned texture_width, texture_height;
46 unsigned texture_mask;
47 };
48
49
50
51 /**
52 * Is the given mutex held by the calling thread?
53 */
54 bool
stw_own_mutex(const CRITICAL_SECTION * cs)55 stw_own_mutex(const CRITICAL_SECTION *cs)
56 {
57 // We can't compare OwningThread with our thread handle/id (see
58 // http://stackoverflow.com/a/12675635 ) but we can compare with the
59 // OwningThread member of a critical section we know we own.
60 CRITICAL_SECTION dummy;
61 InitializeCriticalSection(&dummy);
62 EnterCriticalSection(&dummy);
63 if (0)
64 _debug_printf("%p %p\n", cs->OwningThread, dummy.OwningThread);
65 bool ret = cs->OwningThread == dummy.OwningThread;
66 LeaveCriticalSection(&dummy);
67 DeleteCriticalSection(&dummy);
68 return ret;
69 }
70
71
72 /**
73 * Remove outdated textures and create the requested ones.
74 */
75 static void
stw_st_framebuffer_validate_locked(struct st_framebuffer_iface * stfb,unsigned width,unsigned height,unsigned mask)76 stw_st_framebuffer_validate_locked(struct st_framebuffer_iface *stfb,
77 unsigned width, unsigned height,
78 unsigned mask)
79 {
80 struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
81 struct pipe_resource templ;
82 unsigned i;
83
84 /* remove outdated textures */
85 if (stwfb->texture_width != width || stwfb->texture_height != height) {
86 for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
87 pipe_resource_reference(&stwfb->textures[i], NULL);
88 }
89
90 memset(&templ, 0, sizeof(templ));
91 templ.target = PIPE_TEXTURE_2D;
92 templ.width0 = width;
93 templ.height0 = height;
94 templ.depth0 = 1;
95 templ.array_size = 1;
96 templ.last_level = 0;
97 templ.nr_samples = stwfb->stvis.samples;
98
99 for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
100 enum pipe_format format;
101 unsigned bind;
102
103 /* the texture already exists or not requested */
104 if (stwfb->textures[i] || !(mask & (1 << i))) {
105 /* remember the texture */
106 if (stwfb->textures[i])
107 mask |= (1 << i);
108 continue;
109 }
110
111 switch (i) {
112 case ST_ATTACHMENT_FRONT_LEFT:
113 case ST_ATTACHMENT_BACK_LEFT:
114 format = stwfb->stvis.color_format;
115 bind = PIPE_BIND_DISPLAY_TARGET |
116 PIPE_BIND_SAMPLER_VIEW |
117 PIPE_BIND_RENDER_TARGET;
118 break;
119 case ST_ATTACHMENT_DEPTH_STENCIL:
120 format = stwfb->stvis.depth_stencil_format;
121 bind = PIPE_BIND_DEPTH_STENCIL;
122 break;
123 default:
124 format = PIPE_FORMAT_NONE;
125 break;
126 }
127
128 if (format != PIPE_FORMAT_NONE) {
129 templ.format = format;
130 templ.bind = bind;
131
132 stwfb->textures[i] =
133 stw_dev->screen->resource_create(stw_dev->screen, &templ);
134 }
135 }
136
137 stwfb->texture_width = width;
138 stwfb->texture_height = height;
139 stwfb->texture_mask = mask;
140 }
141
142 static boolean
stw_st_framebuffer_validate(struct st_context_iface * stctx,struct st_framebuffer_iface * stfb,const enum st_attachment_type * statts,unsigned count,struct pipe_resource ** out)143 stw_st_framebuffer_validate(struct st_context_iface *stctx,
144 struct st_framebuffer_iface *stfb,
145 const enum st_attachment_type *statts,
146 unsigned count,
147 struct pipe_resource **out)
148 {
149 struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
150 unsigned statt_mask, i;
151
152 statt_mask = 0x0;
153 for (i = 0; i < count; i++)
154 statt_mask |= 1 << statts[i];
155
156 stw_framebuffer_lock(stwfb->fb);
157
158 if (stwfb->fb->must_resize || (statt_mask & ~stwfb->texture_mask)) {
159 stw_st_framebuffer_validate_locked(&stwfb->base,
160 stwfb->fb->width, stwfb->fb->height, statt_mask);
161 stwfb->fb->must_resize = FALSE;
162 }
163
164 for (i = 0; i < count; i++) {
165 out[i] = NULL;
166 pipe_resource_reference(&out[i], stwfb->textures[statts[i]]);
167 }
168
169 stw_framebuffer_unlock(stwfb->fb);
170
171 return TRUE;
172 }
173
174 /**
175 * Present an attachment of the framebuffer.
176 */
177 static boolean
stw_st_framebuffer_present_locked(HDC hdc,struct st_framebuffer_iface * stfb,enum st_attachment_type statt)178 stw_st_framebuffer_present_locked(HDC hdc,
179 struct st_framebuffer_iface *stfb,
180 enum st_attachment_type statt)
181 {
182 struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
183 struct pipe_resource *resource;
184
185 assert(stw_own_mutex(&stwfb->fb->mutex));
186
187 resource = stwfb->textures[statt];
188 if (resource) {
189 stw_framebuffer_present_locked(hdc, stwfb->fb, resource);
190 }
191 else {
192 stw_framebuffer_unlock(stwfb->fb);
193 }
194
195 assert(!stw_own_mutex(&stwfb->fb->mutex));
196
197 return TRUE;
198 }
199
200 static boolean
stw_st_framebuffer_flush_front(struct st_context_iface * stctx,struct st_framebuffer_iface * stfb,enum st_attachment_type statt)201 stw_st_framebuffer_flush_front(struct st_context_iface *stctx,
202 struct st_framebuffer_iface *stfb,
203 enum st_attachment_type statt)
204 {
205 struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
206 boolean ret;
207 HDC hDC;
208
209 stw_framebuffer_lock(stwfb->fb);
210
211 /* We must not cache HDCs anywhere, as they can be invalidated by the
212 * application, or screen resolution changes. */
213
214 hDC = GetDC(stwfb->fb->hWnd);
215
216 ret = stw_st_framebuffer_present_locked(hDC, &stwfb->base, statt);
217
218 ReleaseDC(stwfb->fb->hWnd, hDC);
219
220 return ret;
221 }
222
223 /**
224 * Create a framebuffer interface.
225 */
226 struct st_framebuffer_iface *
stw_st_create_framebuffer(struct stw_framebuffer * fb)227 stw_st_create_framebuffer(struct stw_framebuffer *fb)
228 {
229 struct stw_st_framebuffer *stwfb;
230
231 stwfb = CALLOC_STRUCT(stw_st_framebuffer);
232 if (!stwfb)
233 return NULL;
234
235 stwfb->fb = fb;
236 stwfb->stvis = fb->pfi->stvis;
237
238 stwfb->base.visual = &stwfb->stvis;
239 p_atomic_set(&stwfb->base.stamp, 1);
240 stwfb->base.flush_front = stw_st_framebuffer_flush_front;
241 stwfb->base.validate = stw_st_framebuffer_validate;
242
243 return &stwfb->base;
244 }
245
246 /**
247 * Destroy a framebuffer interface.
248 */
249 void
stw_st_destroy_framebuffer_locked(struct st_framebuffer_iface * stfb)250 stw_st_destroy_framebuffer_locked(struct st_framebuffer_iface *stfb)
251 {
252 struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
253 int i;
254
255 for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
256 pipe_resource_reference(&stwfb->textures[i], NULL);
257
258 FREE(stwfb);
259 }
260
261 /**
262 * Swap the buffers of the given framebuffer.
263 */
264 boolean
stw_st_swap_framebuffer_locked(HDC hdc,struct st_framebuffer_iface * stfb)265 stw_st_swap_framebuffer_locked(HDC hdc, struct st_framebuffer_iface *stfb)
266 {
267 struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
268 unsigned front = ST_ATTACHMENT_FRONT_LEFT, back = ST_ATTACHMENT_BACK_LEFT;
269 struct pipe_resource *ptex;
270 unsigned mask;
271
272 /* swap the textures */
273 ptex = stwfb->textures[front];
274 stwfb->textures[front] = stwfb->textures[back];
275 stwfb->textures[back] = ptex;
276
277 /* convert to mask */
278 front = 1 << front;
279 back = 1 << back;
280
281 /* swap the bits in mask */
282 mask = stwfb->texture_mask & ~(front | back);
283 if (stwfb->texture_mask & front)
284 mask |= back;
285 if (stwfb->texture_mask & back)
286 mask |= front;
287 stwfb->texture_mask = mask;
288
289 front = ST_ATTACHMENT_FRONT_LEFT;
290 return stw_st_framebuffer_present_locked(hdc, &stwfb->base, front);
291 }
292
293
294 /**
295 * Return the pipe_resource that correspond to given buffer.
296 */
297 struct pipe_resource *
stw_get_framebuffer_resource(struct st_framebuffer_iface * stfb,enum st_attachment_type att)298 stw_get_framebuffer_resource(struct st_framebuffer_iface *stfb,
299 enum st_attachment_type att)
300 {
301 struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
302 return stwfb->textures[att];
303 }
304
305
306 /**
307 * Create an st_api of the state tracker.
308 */
309 struct st_api *
stw_st_create_api(void)310 stw_st_create_api(void)
311 {
312 return st_gl_api_create();
313 }
314