drisw.c revision 2b64886c8122227ffa2d86abb9b4a5d79d1e2451 
1/**************************************************************************
2 *
3 * Copyright 2009, VMware, Inc.
4 * All Rights Reserved.
5 * Copyright 2010 George Sapountzis <gsapountzis@gmail.com>
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28
29/* TODO:
30 *
31 * xshm / texture_from_pixmap / EGLImage:
32 *
33 * Allow the loaders to use the XSHM extension. It probably requires callbacks
34 * for createImage/destroyImage similar to DRI2 getBuffers.
35 */
36
37#include "util/u_format.h"
38#include "util/u_memory.h"
39#include "util/u_inlines.h"
40#include "pipe/p_context.h"
41#include "state_tracker/drisw_api.h"
42
43#include "dri_screen.h"
44#include "dri_context.h"
45#include "dri_drawable.h"
46
47DEBUG_GET_ONCE_BOOL_OPTION(swrast_no_present, "SWRAST_NO_PRESENT", FALSE);
48static boolean swrast_no_present = FALSE;
49
50static INLINE void
51get_drawable_info(__DRIdrawable *dPriv, int *w, int *h)
52{
53   __DRIscreen *sPriv = dPriv->driScreenPriv;
54   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
55   int x, y;
56
57   loader->getDrawableInfo(dPriv,
58                           &x, &y, w, h,
59                           dPriv->loaderPrivate);
60}
61
62static INLINE void
63put_image(__DRIdrawable *dPriv, void *data, unsigned width, unsigned height)
64{
65   __DRIscreen *sPriv = dPriv->driScreenPriv;
66   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
67
68   loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
69                    0, 0, width, height,
70                    data, dPriv->loaderPrivate);
71}
72
73static void
74drisw_update_drawable_info(struct dri_drawable *drawable)
75{
76   __DRIdrawable *dPriv = drawable->dPriv;
77
78   get_drawable_info(dPriv, &dPriv->w, &dPriv->h);
79}
80
81static void
82drisw_put_image(struct dri_drawable *drawable,
83                void *data, unsigned width, unsigned height)
84{
85   __DRIdrawable *dPriv = drawable->dPriv;
86
87   put_image(dPriv, data, width, height);
88}
89
90static INLINE void
91drisw_present_texture(__DRIdrawable *dPriv,
92                      struct pipe_resource *ptex)
93{
94   struct dri_drawable *drawable = dri_drawable(dPriv);
95   struct dri_screen *screen = dri_screen(drawable->sPriv);
96
97   if (swrast_no_present)
98      return;
99
100   screen->base.screen->flush_frontbuffer(screen->base.screen, ptex, 0, 0, drawable);
101}
102
103static INLINE void
104drisw_invalidate_drawable(__DRIdrawable *dPriv)
105{
106   struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
107   struct dri_drawable *drawable = dri_drawable(dPriv);
108
109   drawable->texture_stamp = dPriv->lastStamp - 1;
110
111   /* check if swapping currently bound buffer */
112   if (ctx && ctx->dPriv == dPriv)
113      ctx->st->notify_invalid_framebuffer(ctx->st, &drawable->base);
114}
115
116static INLINE void
117drisw_copy_to_front(__DRIdrawable * dPriv,
118                    struct pipe_resource *ptex)
119{
120   drisw_present_texture(dPriv, ptex);
121
122   drisw_invalidate_drawable(dPriv);
123}
124
125/*
126 * Backend functions for st_framebuffer interface and swap_buffers.
127 */
128
129static void
130drisw_swap_buffers(__DRIdrawable *dPriv)
131{
132   struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
133   struct dri_drawable *drawable = dri_drawable(dPriv);
134   struct pipe_resource *ptex;
135
136   if (!ctx)
137      return;
138
139   ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
140
141   if (ptex) {
142      ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
143
144      drisw_copy_to_front(dPriv, ptex);
145   }
146}
147
148static void
149drisw_flush_frontbuffer(struct dri_drawable *drawable,
150                        enum st_attachment_type statt)
151{
152   struct dri_context *ctx = dri_get_current(drawable->sPriv);
153   struct pipe_resource *ptex;
154
155   if (!ctx)
156      return;
157
158   ptex = drawable->textures[statt];
159
160   if (ptex) {
161      drisw_copy_to_front(ctx->dPriv, ptex);
162   }
163}
164
165/**
166 * Allocate framebuffer attachments.
167 *
168 * During fixed-size operation, the function keeps allocating new attachments
169 * as they are requested. Unused attachments are not removed, not until the
170 * framebuffer is resized or destroyed.
171 */
172static void
173drisw_allocate_textures(struct dri_drawable *drawable,
174                        const enum st_attachment_type *statts,
175                        unsigned count)
176{
177   struct dri_screen *screen = dri_screen(drawable->sPriv);
178   struct pipe_resource templ;
179   unsigned width, height;
180   boolean resized;
181   unsigned i;
182
183   width  = drawable->dPriv->w;
184   height = drawable->dPriv->h;
185
186   resized = (drawable->old_w != width ||
187              drawable->old_h != height);
188
189   /* remove outdated textures */
190   if (resized) {
191      for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
192         pipe_resource_reference(&drawable->textures[i], NULL);
193   }
194
195   memset(&templ, 0, sizeof(templ));
196   templ.target = screen->target;
197   templ.width0 = width;
198   templ.height0 = height;
199   templ.depth0 = 1;
200   templ.array_size = 1;
201   templ.last_level = 0;
202
203   for (i = 0; i < count; i++) {
204      enum pipe_format format;
205      unsigned bind;
206
207      /* the texture already exists or not requested */
208      if (drawable->textures[statts[i]])
209         continue;
210
211      dri_drawable_get_format(drawable, statts[i], &format, &bind);
212
213      /* if we don't do any present, no need for display targets */
214      if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL && !swrast_no_present)
215         bind |= PIPE_BIND_DISPLAY_TARGET;
216
217      if (format == PIPE_FORMAT_NONE)
218         continue;
219
220      templ.format = format;
221      templ.bind = bind;
222
223      drawable->textures[statts[i]] =
224         screen->base.screen->resource_create(screen->base.screen, &templ);
225   }
226
227   drawable->old_w = width;
228   drawable->old_h = height;
229}
230
231/*
232 * Backend function for init_screen.
233 */
234
235static const __DRIextension *drisw_screen_extensions[] = {
236   &driTexBufferExtension.base,
237   NULL
238};
239
240static struct drisw_loader_funcs drisw_lf = {
241   .put_image = drisw_put_image
242};
243
244static const __DRIconfig **
245drisw_init_screen(__DRIscreen * sPriv)
246{
247   const __DRIconfig **configs;
248   struct dri_screen *screen;
249   struct pipe_screen *pscreen;
250
251   screen = CALLOC_STRUCT(dri_screen);
252   if (!screen)
253      return NULL;
254
255   screen->sPriv = sPriv;
256   screen->fd = -1;
257
258   swrast_no_present = debug_get_option_swrast_no_present();
259
260   sPriv->private = (void *)screen;
261   sPriv->extensions = drisw_screen_extensions;
262
263   pscreen = drisw_create_screen(&drisw_lf);
264   /* dri_init_screen_helper checks pscreen for us */
265
266   configs = dri_init_screen_helper(screen, pscreen, 32);
267   if (!configs)
268      goto fail;
269
270   return configs;
271fail:
272   dri_destroy_screen_helper(screen);
273   FREE(screen);
274   return NULL;
275}
276
277static boolean
278drisw_create_buffer(__DRIscreen * sPriv,
279                    __DRIdrawable * dPriv,
280                    const struct gl_config * visual, boolean isPixmap)
281{
282   struct dri_drawable *drawable = NULL;
283
284   if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
285      return FALSE;
286
287   drawable = dPriv->driverPrivate;
288
289   drawable->allocate_textures = drisw_allocate_textures;
290   drawable->update_drawable_info = drisw_update_drawable_info;
291   drawable->flush_frontbuffer = drisw_flush_frontbuffer;
292
293   return TRUE;
294}
295
296/**
297 * DRI driver virtual function table.
298 *
299 * DRI versions differ in their implementation of init_screen and swap_buffers.
300 */
301const struct __DriverAPIRec driDriverAPI = {
302   .InitScreen = drisw_init_screen,
303   .DestroyScreen = dri_destroy_screen,
304   .CreateContext = dri_create_context,
305   .DestroyContext = dri_destroy_context,
306   .CreateBuffer = drisw_create_buffer,
307   .DestroyBuffer = dri_destroy_buffer,
308   .MakeCurrent = dri_make_current,
309   .UnbindContext = dri_unbind_context,
310
311   .SwapBuffers = drisw_swap_buffers,
312};
313
314/* This is the table of extensions that the loader will dlsym() for. */
315PUBLIC const __DRIextension *__driDriverExtensions[] = {
316    &driCoreExtension.base,
317    &driSWRastExtension.base,
318    NULL
319};
320
321/* vim: set sw=3 ts=8 sts=3 expandtab: */
322