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 / 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#include "state_tracker/st_context.h"
43
44#include "dri_screen.h"
45#include "dri_context.h"
46#include "dri_drawable.h"
47
48DEBUG_GET_ONCE_BOOL_OPTION(swrast_no_present, "SWRAST_NO_PRESENT", FALSE);
49static boolean swrast_no_present = FALSE;
50
51static INLINE void
52get_drawable_info(__DRIdrawable *dPriv, int *x, int *y, int *w, int *h)
53{
54   __DRIscreen *sPriv = dPriv->driScreenPriv;
55   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
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 INLINE void
74get_image(__DRIdrawable *dPriv, int x, int y, int width, int height, void *data)
75{
76   __DRIscreen *sPriv = dPriv->driScreenPriv;
77   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
78
79   loader->getImage(dPriv,
80                    x, y, width, height,
81                    data, dPriv->loaderPrivate);
82}
83
84static void
85drisw_update_drawable_info(struct dri_drawable *drawable)
86{
87   __DRIdrawable *dPriv = drawable->dPriv;
88   int x, y;
89
90   get_drawable_info(dPriv, &x, &y, &dPriv->w, &dPriv->h);
91}
92
93static void
94drisw_put_image(struct dri_drawable *drawable,
95                void *data, unsigned width, unsigned height)
96{
97   __DRIdrawable *dPriv = drawable->dPriv;
98
99   put_image(dPriv, data, width, height);
100}
101
102static INLINE void
103drisw_present_texture(__DRIdrawable *dPriv,
104                      struct pipe_resource *ptex)
105{
106   struct dri_drawable *drawable = dri_drawable(dPriv);
107   struct dri_screen *screen = dri_screen(drawable->sPriv);
108
109   if (swrast_no_present)
110      return;
111
112   screen->base.screen->flush_frontbuffer(screen->base.screen, ptex, 0, 0, drawable);
113}
114
115static INLINE void
116drisw_invalidate_drawable(__DRIdrawable *dPriv)
117{
118   struct dri_drawable *drawable = dri_drawable(dPriv);
119
120   drawable->texture_stamp = dPriv->lastStamp - 1;
121
122   p_atomic_inc(&drawable->base.stamp);
123}
124
125static INLINE void
126drisw_copy_to_front(__DRIdrawable * dPriv,
127                    struct pipe_resource *ptex)
128{
129   drisw_present_texture(dPriv, ptex);
130
131   drisw_invalidate_drawable(dPriv);
132}
133
134/*
135 * Backend functions for st_framebuffer interface and swap_buffers.
136 */
137
138static void
139drisw_swap_buffers(__DRIdrawable *dPriv)
140{
141   struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
142   struct dri_drawable *drawable = dri_drawable(dPriv);
143   struct pipe_resource *ptex;
144
145   if (!ctx)
146      return;
147
148   ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
149
150   if (ptex) {
151      if (ctx->pp && drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL])
152         pp_run(ctx->pp, ptex, ptex, drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL]);
153
154      ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
155
156      drisw_copy_to_front(dPriv, ptex);
157   }
158}
159
160static void
161drisw_flush_frontbuffer(struct dri_drawable *drawable,
162                        enum st_attachment_type statt)
163{
164   struct dri_context *ctx = dri_get_current(drawable->sPriv);
165   struct pipe_resource *ptex;
166
167   if (!ctx)
168      return;
169
170   ptex = drawable->textures[statt];
171
172   if (ptex) {
173      drisw_copy_to_front(ctx->dPriv, ptex);
174   }
175}
176
177/**
178 * Allocate framebuffer attachments.
179 *
180 * During fixed-size operation, the function keeps allocating new attachments
181 * as they are requested. Unused attachments are not removed, not until the
182 * framebuffer is resized or destroyed.
183 */
184static void
185drisw_allocate_textures(struct dri_drawable *drawable,
186                        const enum st_attachment_type *statts,
187                        unsigned count)
188{
189   struct dri_screen *screen = dri_screen(drawable->sPriv);
190   struct pipe_resource templ;
191   unsigned width, height;
192   boolean resized;
193   unsigned i;
194
195   width  = drawable->dPriv->w;
196   height = drawable->dPriv->h;
197
198   resized = (drawable->old_w != width ||
199              drawable->old_h != height);
200
201   /* remove outdated textures */
202   if (resized) {
203      for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
204         pipe_resource_reference(&drawable->textures[i], NULL);
205   }
206
207   memset(&templ, 0, sizeof(templ));
208   templ.target = screen->target;
209   templ.width0 = width;
210   templ.height0 = height;
211   templ.depth0 = 1;
212   templ.array_size = 1;
213   templ.last_level = 0;
214
215   for (i = 0; i < count; i++) {
216      enum pipe_format format;
217      unsigned bind;
218
219      /* the texture already exists or not requested */
220      if (drawable->textures[statts[i]])
221         continue;
222
223      dri_drawable_get_format(drawable, statts[i], &format, &bind);
224
225      /* if we don't do any present, no need for display targets */
226      if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL && !swrast_no_present)
227         bind |= PIPE_BIND_DISPLAY_TARGET;
228
229      if (format == PIPE_FORMAT_NONE)
230         continue;
231
232      templ.format = format;
233      templ.bind = bind;
234
235      drawable->textures[statts[i]] =
236         screen->base.screen->resource_create(screen->base.screen, &templ);
237   }
238
239   drawable->old_w = width;
240   drawable->old_h = height;
241}
242
243static void
244drisw_update_tex_buffer(struct dri_drawable *drawable,
245                        struct dri_context *ctx,
246                        struct pipe_resource *res)
247{
248   __DRIdrawable *dPriv = drawable->dPriv;
249
250   struct st_context *st_ctx = (struct st_context *)ctx->st;
251   struct pipe_context *pipe = st_ctx->pipe;
252   struct pipe_transfer *transfer;
253   char *map;
254   int x, y, w, h;
255   int ximage_stride, line;
256   int cpp = util_format_get_blocksize(res->format);
257
258   get_drawable_info(dPriv, &x, &y, &w, &h);
259
260   transfer = pipe_get_transfer(pipe, res,
261                                0, 0, // level, layer,
262                                PIPE_TRANSFER_WRITE,
263                                x, y, w, h);
264   map = pipe_transfer_map(pipe, transfer);
265
266   /* Copy the Drawable content to the mapped texture buffer */
267   get_image(dPriv, x, y, w, h, map);
268
269   /* The pipe transfer has a pitch rounded up to the nearest 64 pixels. */
270   ximage_stride = w * cpp;
271   for (line = h-1; line; --line) {
272      memmove(&map[line * transfer->stride],
273              &map[line * ximage_stride],
274              ximage_stride);
275   }
276
277   pipe_transfer_unmap(pipe, transfer);
278   pipe_transfer_destroy(pipe, transfer);
279}
280
281/*
282 * Backend function for init_screen.
283 */
284
285static const __DRIextension *drisw_screen_extensions[] = {
286   &driTexBufferExtension.base,
287   NULL
288};
289
290static struct drisw_loader_funcs drisw_lf = {
291   .put_image = drisw_put_image
292};
293
294static const __DRIconfig **
295drisw_init_screen(__DRIscreen * sPriv)
296{
297   const __DRIconfig **configs;
298   struct dri_screen *screen;
299   struct pipe_screen *pscreen;
300
301   screen = CALLOC_STRUCT(dri_screen);
302   if (!screen)
303      return NULL;
304
305   screen->sPriv = sPriv;
306   screen->fd = -1;
307
308   swrast_no_present = debug_get_option_swrast_no_present();
309
310   sPriv->driverPrivate = (void *)screen;
311   sPriv->extensions = drisw_screen_extensions;
312
313   pscreen = drisw_create_screen(&drisw_lf);
314   /* dri_init_screen_helper checks pscreen for us */
315
316   configs = dri_init_screen_helper(screen, pscreen, 32);
317   if (!configs)
318      goto fail;
319
320   return configs;
321fail:
322   dri_destroy_screen_helper(screen);
323   FREE(screen);
324   return NULL;
325}
326
327static boolean
328drisw_create_buffer(__DRIscreen * sPriv,
329                    __DRIdrawable * dPriv,
330                    const struct gl_config * visual, boolean isPixmap)
331{
332   struct dri_drawable *drawable = NULL;
333
334   if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
335      return FALSE;
336
337   drawable = dPriv->driverPrivate;
338
339   drawable->allocate_textures = drisw_allocate_textures;
340   drawable->update_drawable_info = drisw_update_drawable_info;
341   drawable->flush_frontbuffer = drisw_flush_frontbuffer;
342   drawable->update_tex_buffer = drisw_update_tex_buffer;
343
344   return TRUE;
345}
346
347/**
348 * DRI driver virtual function table.
349 *
350 * DRI versions differ in their implementation of init_screen and swap_buffers.
351 */
352const struct __DriverAPIRec driDriverAPI = {
353   .InitScreen = drisw_init_screen,
354   .DestroyScreen = dri_destroy_screen,
355   .CreateContext = dri_create_context,
356   .DestroyContext = dri_destroy_context,
357   .CreateBuffer = drisw_create_buffer,
358   .DestroyBuffer = dri_destroy_buffer,
359   .SwapBuffers = drisw_swap_buffers,
360   .MakeCurrent = dri_make_current,
361   .UnbindContext = dri_unbind_context,
362};
363
364/* This is the table of extensions that the loader will dlsym() for. */
365PUBLIC const __DRIextension *__driDriverExtensions[] = {
366    &driCoreExtension.base,
367    &driSWRastExtension.base,
368    NULL
369};
370
371/* vim: set sw=3 ts=8 sts=3 expandtab: */
372