1/*
2 * Mesa 3-D graphics library
3 * Version:  7.9
4 *
5 * Copyright (C) 2010 LunarG Inc.
6 *
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:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
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.
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
38struct 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
49static INLINE struct stw_st_framebuffer *
50stw_st_framebuffer(struct st_framebuffer_iface *stfb)
51{
52   return (struct stw_st_framebuffer *) stfb;
53}
54
55/**
56 * Remove outdated textures and create the requested ones.
57 */
58static void
59stw_st_framebuffer_validate_locked(struct st_framebuffer_iface *stfb,
60                                   unsigned width, unsigned height,
61                                   unsigned mask)
62{
63   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
64   struct pipe_resource templ;
65   unsigned i;
66
67   /* remove outdated textures */
68   if (stwfb->texture_width != width || stwfb->texture_height != height) {
69      for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
70         pipe_resource_reference(&stwfb->textures[i], NULL);
71   }
72
73   memset(&templ, 0, sizeof(templ));
74   templ.target = PIPE_TEXTURE_2D;
75   templ.width0 = width;
76   templ.height0 = height;
77   templ.depth0 = 1;
78   templ.array_size = 1;
79   templ.last_level = 0;
80
81   for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
82      enum pipe_format format;
83      unsigned bind;
84
85      /* the texture already exists or not requested */
86      if (stwfb->textures[i] || !(mask & (1 << i))) {
87         /* remember the texture */
88         if (stwfb->textures[i])
89            mask |= (1 << i);
90         continue;
91      }
92
93      switch (i) {
94      case ST_ATTACHMENT_FRONT_LEFT:
95      case ST_ATTACHMENT_BACK_LEFT:
96         format = stwfb->stvis.color_format;
97         bind = PIPE_BIND_DISPLAY_TARGET |
98                PIPE_BIND_RENDER_TARGET;
99         break;
100      case ST_ATTACHMENT_DEPTH_STENCIL:
101         format = stwfb->stvis.depth_stencil_format;
102         bind = PIPE_BIND_DEPTH_STENCIL;
103         break;
104      default:
105         format = PIPE_FORMAT_NONE;
106         break;
107      }
108
109      if (format != PIPE_FORMAT_NONE) {
110         templ.format = format;
111         templ.bind = bind;
112
113         stwfb->textures[i] =
114            stw_dev->screen->resource_create(stw_dev->screen, &templ);
115      }
116   }
117
118   stwfb->texture_width = width;
119   stwfb->texture_height = height;
120   stwfb->texture_mask = mask;
121}
122
123static boolean
124stw_st_framebuffer_validate(struct st_framebuffer_iface *stfb,
125                            const enum st_attachment_type *statts,
126                            unsigned count,
127                            struct pipe_resource **out)
128{
129   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
130   unsigned statt_mask, i;
131
132   statt_mask = 0x0;
133   for (i = 0; i < count; i++)
134      statt_mask |= 1 << statts[i];
135
136   pipe_mutex_lock(stwfb->fb->mutex);
137
138   if (stwfb->fb->must_resize || (statt_mask & ~stwfb->texture_mask)) {
139      stw_st_framebuffer_validate_locked(&stwfb->base,
140            stwfb->fb->width, stwfb->fb->height, statt_mask);
141      stwfb->fb->must_resize = FALSE;
142   }
143
144   for (i = 0; i < count; i++) {
145      out[i] = NULL;
146      pipe_resource_reference(&out[i], stwfb->textures[statts[i]]);
147   }
148
149   stw_framebuffer_release(stwfb->fb);
150
151   return TRUE;
152}
153
154/**
155 * Present an attachment of the framebuffer.
156 */
157static boolean
158stw_st_framebuffer_present_locked(HDC hdc,
159                                  struct st_framebuffer_iface *stfb,
160                                  enum st_attachment_type statt)
161{
162   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
163   struct pipe_resource *resource;
164
165   resource = stwfb->textures[statt];
166   if (resource) {
167      stw_framebuffer_present_locked(hdc, stwfb->fb, resource);
168   }
169
170   return TRUE;
171}
172
173static boolean
174stw_st_framebuffer_flush_front(struct st_framebuffer_iface *stfb,
175                               enum st_attachment_type statt)
176{
177   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
178
179   pipe_mutex_lock(stwfb->fb->mutex);
180
181   return stw_st_framebuffer_present_locked(stwfb->fb->hDC, &stwfb->base, statt);
182}
183
184/**
185 * Create a framebuffer interface.
186 */
187struct st_framebuffer_iface *
188stw_st_create_framebuffer(struct stw_framebuffer *fb)
189{
190   struct stw_st_framebuffer *stwfb;
191
192   stwfb = CALLOC_STRUCT(stw_st_framebuffer);
193   if (!stwfb)
194      return NULL;
195
196   stwfb->fb = fb;
197   stwfb->stvis = fb->pfi->stvis;
198
199   stwfb->base.visual = &stwfb->stvis;
200   p_atomic_set(&stwfb->base.stamp, 1);
201   stwfb->base.flush_front = stw_st_framebuffer_flush_front;
202   stwfb->base.validate = stw_st_framebuffer_validate;
203
204   return &stwfb->base;
205}
206
207/**
208 * Destroy a framebuffer interface.
209 */
210void
211stw_st_destroy_framebuffer_locked(struct st_framebuffer_iface *stfb)
212{
213   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
214   int i;
215
216   for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
217      pipe_resource_reference(&stwfb->textures[i], NULL);
218
219   FREE(stwfb);
220}
221
222/**
223 * Swap the buffers of the given framebuffer.
224 */
225boolean
226stw_st_swap_framebuffer_locked(HDC hdc, struct st_framebuffer_iface *stfb)
227{
228   struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
229   unsigned front = ST_ATTACHMENT_FRONT_LEFT, back = ST_ATTACHMENT_BACK_LEFT;
230   struct pipe_resource *ptex;
231   unsigned mask;
232
233   /* swap the textures */
234   ptex = stwfb->textures[front];
235   stwfb->textures[front] = stwfb->textures[back];
236   stwfb->textures[back] = ptex;
237
238   /* convert to mask */
239   front = 1 << front;
240   back = 1 << back;
241
242   /* swap the bits in mask */
243   mask = stwfb->texture_mask & ~(front | back);
244   if (stwfb->texture_mask & front)
245      mask |= back;
246   if (stwfb->texture_mask & back)
247      mask |= front;
248   stwfb->texture_mask = mask;
249
250   front = ST_ATTACHMENT_FRONT_LEFT;
251   return stw_st_framebuffer_present_locked(hdc, &stwfb->base, front);
252}
253
254/**
255 * Create an st_api of the state tracker.
256 */
257struct st_api *
258stw_st_create_api(void)
259{
260   return st_gl_api_create();
261}
262