native_gdi.c revision b19b8580602a6ba37e81dc8b64c4ed30c1518886 
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 OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 *    Chia-I Wu <olv@lunarg.com>
27 */
28
29#include <windows.h>
30
31#include "pipe/p_compiler.h"
32#include "util/u_memory.h"
33#include "util/u_format.h"
34#include "util/u_inlines.h"
35#include "gdi/gdi_sw_winsys.h"
36
37#include "common/native_helper.h"
38#include "common/native.h"
39
40struct gdi_display {
41   struct native_display base;
42
43   HDC hDC;
44   struct native_event_handler *event_handler;
45
46   struct native_config *configs;
47   int num_configs;
48};
49
50struct gdi_surface {
51   struct native_surface base;
52
53   HWND hWnd;
54   enum pipe_format color_format;
55
56   struct gdi_display *gdpy;
57
58   unsigned int server_stamp;
59   unsigned int client_stamp;
60
61   struct resource_surface *rsurf;
62};
63
64static INLINE struct gdi_display *
65gdi_display(const struct native_display *ndpy)
66{
67   return (struct gdi_display *) ndpy;
68}
69
70static INLINE struct gdi_surface *
71gdi_surface(const struct native_surface *nsurf)
72{
73   return (struct gdi_surface *) nsurf;
74}
75
76/**
77 * Update the geometry of the surface.  This is a slow functions.
78 */
79static void
80gdi_surface_update_geometry(struct native_surface *nsurf)
81{
82   struct gdi_surface *gsurf = gdi_surface(nsurf);
83   RECT rect;
84   uint w, h;
85
86   GetClientRect(gsurf->hWnd, &rect);
87   w = rect.right - rect.left;
88   h = rect.bottom - rect.top;
89
90   if (resource_surface_set_size(gsurf->rsurf, w, h))
91      gsurf->server_stamp++;
92}
93
94/**
95 * Update the buffers of the surface.
96 */
97static boolean
98gdi_surface_update_buffers(struct native_surface *nsurf, uint buffer_mask)
99{
100   struct gdi_surface *gsurf = gdi_surface(nsurf);
101
102   if (gsurf->client_stamp != gsurf->server_stamp) {
103      gdi_surface_update_geometry(&gsurf->base);
104      gsurf->client_stamp = gsurf->server_stamp;
105   }
106
107   return resource_surface_add_resources(gsurf->rsurf, buffer_mask);
108}
109
110/**
111 * Emulate an invalidate event.
112 */
113static void
114gdi_surface_invalidate(struct native_surface *nsurf)
115{
116   struct gdi_surface *gsurf = gdi_surface(nsurf);
117   struct gdi_display *gdpy = gsurf->gdpy;
118
119   gsurf->server_stamp++;
120   gdpy->event_handler->invalid_surface(&gdpy->base,
121         &gsurf->base, gsurf->server_stamp);
122}
123
124static boolean
125gdi_surface_flush_frontbuffer(struct native_surface *nsurf)
126{
127   struct gdi_surface *gsurf = gdi_surface(nsurf);
128   HDC hDC;
129   boolean ret;
130
131   hDC = GetDC(gsurf->hWnd);
132   ret = resource_surface_present(gsurf->rsurf,
133         NATIVE_ATTACHMENT_FRONT_LEFT, (void *) hDC);
134   ReleaseDC(gsurf->hWnd, hDC);
135
136   /* force buffers to be updated in next validation call */
137   gdi_surface_invalidate(&gsurf->base);
138
139   return ret;
140}
141
142static boolean
143gdi_surface_swap_buffers(struct native_surface *nsurf)
144{
145   struct gdi_surface *gsurf = gdi_surface(nsurf);
146   HDC hDC;
147   boolean ret;
148
149   hDC = GetDC(gsurf->hWnd);
150   ret = resource_surface_present(gsurf->rsurf,
151         NATIVE_ATTACHMENT_BACK_LEFT, (void *) hDC);
152   ReleaseDC(gsurf->hWnd, hDC);
153
154   resource_surface_swap_buffers(gsurf->rsurf,
155         NATIVE_ATTACHMENT_FRONT_LEFT, NATIVE_ATTACHMENT_BACK_LEFT, TRUE);
156   /* the front/back buffers have been swapped */
157   gdi_surface_invalidate(&gsurf->base);
158
159   return ret;
160}
161
162static boolean
163gdi_surface_present(struct native_surface *nsurf,
164                    enum native_attachment natt,
165                    boolean preserve,
166                    uint swap_interval)
167{
168   boolean ret;
169
170   if (preserve || swap_interval)
171      return FALSE;
172
173   switch (natt) {
174   case NATIVE_ATTACHMENT_FRONT_LEFT:
175      ret = gdi_surface_flush_frontbuffer(nsurf);
176      break;
177   case NATIVE_ATTACHMENT_BACK_LEFT:
178      ret = gdi_surface_swap_buffers(nsurf);
179      break;
180   default:
181      ret = FALSE;
182      break;
183   }
184
185   return ret;
186}
187
188static boolean
189gdi_surface_validate(struct native_surface *nsurf, uint attachment_mask,
190                        unsigned int *seq_num, struct pipe_resource **textures,
191                        int *width, int *height)
192{
193   struct gdi_surface *gsurf = gdi_surface(nsurf);
194   uint w, h;
195
196   if (!gdi_surface_update_buffers(&gsurf->base, attachment_mask))
197      return FALSE;
198
199   if (seq_num)
200      *seq_num = gsurf->client_stamp;
201
202   if (textures)
203      resource_surface_get_resources(gsurf->rsurf, textures, attachment_mask);
204
205   resource_surface_get_size(gsurf->rsurf, &w, &h);
206   if (width)
207      *width = w;
208   if (height)
209      *height = h;
210
211   return TRUE;
212}
213
214static void
215gdi_surface_wait(struct native_surface *nsurf)
216{
217   /* no-op */
218}
219
220static void
221gdi_surface_destroy(struct native_surface *nsurf)
222{
223   struct gdi_surface *gsurf = gdi_surface(nsurf);
224
225   resource_surface_destroy(gsurf->rsurf);
226   FREE(gsurf);
227}
228
229static struct native_surface *
230gdi_display_create_window_surface(struct native_display *ndpy,
231                                  EGLNativeWindowType win,
232                                  const struct native_config *nconf)
233{
234   struct gdi_display *gdpy = gdi_display(ndpy);
235   struct gdi_surface *gsurf;
236
237   gsurf = CALLOC_STRUCT(gdi_surface);
238   if (!gsurf)
239      return NULL;
240
241   gsurf->gdpy = gdpy;
242   gsurf->color_format = nconf->color_format;
243   gsurf->hWnd = (HWND) win;
244
245   gsurf->rsurf = resource_surface_create(gdpy->base.screen,
246         gsurf->color_format,
247         PIPE_BIND_RENDER_TARGET |
248         PIPE_BIND_SAMPLER_VIEW |
249         PIPE_BIND_DISPLAY_TARGET |
250         PIPE_BIND_SCANOUT);
251   if (!gsurf->rsurf) {
252      FREE(gsurf);
253      return NULL;
254   }
255
256   /* initialize the geometry */
257   gdi_surface_update_geometry(&gsurf->base);
258
259   gsurf->base.destroy = gdi_surface_destroy;
260   gsurf->base.present = gdi_surface_present;
261   gsurf->base.validate = gdi_surface_validate;
262   gsurf->base.wait = gdi_surface_wait;
263
264   return &gsurf->base;
265}
266
267static int
268fill_color_formats(struct native_display *ndpy, enum pipe_format formats[8])
269{
270   struct pipe_screen *screen = ndpy->screen;
271   int i, count = 0;
272
273   enum pipe_format candidates[] = {
274      /* 32-bit */
275      PIPE_FORMAT_B8G8R8A8_UNORM,
276      PIPE_FORMAT_A8R8G8B8_UNORM,
277      /* 24-bit */
278      PIPE_FORMAT_B8G8R8X8_UNORM,
279      PIPE_FORMAT_X8R8G8B8_UNORM,
280      /* 16-bit */
281      PIPE_FORMAT_B5G6R5_UNORM
282   };
283
284   assert(Elements(candidates) <= 8);
285
286   for (i = 0; i < Elements(candidates); i++) {
287      if (screen->is_format_supported(screen, candidates[i],
288               PIPE_TEXTURE_2D, 0, PIPE_BIND_RENDER_TARGET, 0))
289         formats[count++] = candidates[i];
290   }
291
292   return count;
293}
294
295static const struct native_config **
296gdi_display_get_configs(struct native_display *ndpy, int *num_configs)
297{
298   struct gdi_display *gdpy = gdi_display(ndpy);
299   const struct native_config **configs;
300   int i;
301
302   /* first time */
303   if (!gdpy->configs) {
304      enum pipe_format formats[8];
305      int i, count;
306
307      count = fill_color_formats(&gdpy->base, formats);
308
309      gdpy->configs = CALLOC(count, sizeof(*gdpy->configs));
310      if (!gdpy->configs)
311         return NULL;
312
313      for (i = 0; i < count; i++) {
314         struct native_config *nconf = &gdpy->configs[i];
315
316         nconf->buffer_mask =
317            (1 << NATIVE_ATTACHMENT_FRONT_LEFT) |
318            (1 << NATIVE_ATTACHMENT_BACK_LEFT);
319         nconf->color_format = formats[i];
320
321         nconf->window_bit = TRUE;
322         nconf->slow_config = TRUE;
323      }
324
325      gdpy->num_configs = count;
326   }
327
328   configs = MALLOC(gdpy->num_configs * sizeof(*configs));
329   if (configs) {
330      for (i = 0; i < gdpy->num_configs; i++)
331         configs[i] = (const struct native_config *) &gdpy->configs[i];
332      if (num_configs)
333         *num_configs = gdpy->num_configs;
334   }
335   return configs;
336}
337
338static int
339gdi_display_get_param(struct native_display *ndpy,
340                         enum native_param_type param)
341{
342   int val;
343
344   switch (param) {
345   case NATIVE_PARAM_USE_NATIVE_BUFFER:
346      /* private buffers are allocated */
347      val = FALSE;
348      break;
349   case NATIVE_PARAM_PRESERVE_BUFFER:
350   case NATIVE_PARAM_MAX_SWAP_INTERVAL:
351   default:
352      val = 0;
353      break;
354   }
355
356   return val;
357}
358
359static void
360gdi_display_destroy(struct native_display *ndpy)
361{
362   struct gdi_display *gdpy = gdi_display(ndpy);
363
364   if (gdpy->configs)
365      FREE(gdpy->configs);
366
367   gdpy->base.screen->destroy(gdpy->base.screen);
368
369   FREE(gdpy);
370}
371
372static struct native_display *
373gdi_create_display(HDC hDC, struct native_event_handler *event_handler,
374                   void *user_data)
375{
376   struct gdi_display *gdpy;
377   struct sw_winsys *winsys;
378
379   gdpy = CALLOC_STRUCT(gdi_display);
380   if (!gdpy)
381      return NULL;
382
383   gdpy->hDC = hDC;
384   gdpy->event_handler = event_handler;
385   gdpy->base.user_data = user_data;
386
387   winsys = gdi_create_sw_winsys();
388   if (!winsys) {
389      FREE(gdpy);
390      return NULL;
391   }
392
393   gdpy->base.screen = gdpy->event_handler->new_sw_screen(&gdpy->base, winsys);
394   if (!gdpy->base.screen) {
395      if (winsys->destroy)
396         winsys->destroy(winsys);
397      FREE(gdpy);
398      return NULL;
399   }
400
401   gdpy->base.destroy = gdi_display_destroy;
402   gdpy->base.get_param = gdi_display_get_param;
403
404   gdpy->base.get_configs = gdi_display_get_configs;
405   gdpy->base.create_window_surface = gdi_display_create_window_surface;
406
407   return &gdpy->base;
408}
409
410static struct native_display *
411native_create_display(void *dpy, struct native_event_handler *event_handler,
412                      void *user_data)
413{
414   return gdi_create_display((HDC) dpy, event_handler, user_data);
415}
416
417static const struct native_platform gdi_platform = {
418   "GDI", /* name */
419   native_create_display
420};
421
422const struct native_platform *
423native_get_gdi_platform(void)
424{
425   return &gdi_platform;
426}
427