tests/glx/glx-multithread-texture.c

   1 /*
   2  * Copyright 2013 Google Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /** @file glx-multithread-texture.c
  25  *
  26  * Test loading texture data from one thread and context while drawing with
  27  * those textures from another thread and shared context.  The threads are
  28  * synchronized so they do not attempt to use the same texture at the same time.
  29  */
  30
  31 #include <unistd.h>
  32
  33 #include "piglit-util-gl.h"
  34 #include "piglit-glx-util.h"
  35 #include "pthread.h"
  36
  37 int piglit_width = 50, piglit_height = 50;
  38 static int tex_width = 512, tex_height = 512;
  39 static unsigned num_test = 300;
  40 static bool quit = false;
  41
  42 static Display *dpy;
  43 static Window draw_win;
  44 static GLXPixmap load_win;
  45 static pthread_mutex_t mutex;
  46 static XVisualInfo *visinfo;
  47 static GLXContext draw_ctx, load_ctx;
  48
  49 /*
  50  * list of textures
  51  *
  52  * user == DRAW means draw thread may draw with this texture
  53  * user == LOAD means load thread may load data into this texture
  54  * user == NONE means texture not in use and may be claimed by either thread
  55  *
  56  * Minimum of three items needed in this array for the code to work.
  57  */
  58 static struct texture {
  59         GLuint id;
  60         int color;
  61         enum user { DRAW, LOAD, NONE } user;
  62 } texture[5];
  63
  64 /*
  65  * If texture at *pos is not in use claim it for 'user' and increment *pos.
  66  * Return texture at *pos.
  67  */
  68 static struct texture *
  69 advance(int *pos, enum user user)
  70 {
  71         int cur = *pos % ARRAY_SIZE(texture);
  72         int next = (cur + 1) % ARRAY_SIZE(texture);
  73
  74         pthread_mutex_lock(&mutex);
  75         assert(texture[cur].user == user);
  76         if (texture[next].user == NONE) {
  77                 texture[cur].user = NONE;
  78                 cur = next;
  79                 *pos += 1;
  80                 texture[cur].user = user;
  81         }
  82         pthread_mutex_unlock(&mutex);
  83
  84         /* helps avoid starvation */
  85         usleep(1);
  86
  87         return texture + cur;
  88 }
  89
  90 /*
  91  * Texture writing thread: loads data into successive textures, taking note
  92  * of what color was used so it can be checked later.
  93  * Return NULL on failure, else non-NULL.
  94  */
  95 static void *
  96 load_func(void *arg)
  97 {
  98         int count = 1;
  99         struct texture *tex = texture + count;
 100         unsigned int tex_bytes = tex_width * tex_height * 4;
 101         unsigned char *tex_data = malloc(tex_bytes);
 102         int ret;
 103
 104         ret = glXMakeCurrent(dpy, load_win, load_ctx);
 105         assert(ret);
 106
 107         glEnable(GL_TEXTURE_2D);
 108
 109         while (!quit && count <= num_test) {
 110                 int color = (3 * count) & 0xff;
 111
 112                 assert(tex->user == LOAD);
 113                 if (tex->color != color) {
 114                         memset(tex_data, color, tex_bytes);
 115                         tex->color = color;
 116                         glBindTexture(GL_TEXTURE_2D, tex->id);
 117                         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_width,
 118                                      tex_height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 119                                      tex_data);
 120                         glFlush();
 121                 }
 122
 123                 tex = advance(&count, LOAD);
 124         }
 125
 126         glFinish();
 127         free(tex_data);
 128
 129         if (count <= num_test) {
 130                 quit = true;
 131                 return NULL;
 132         }
 133
 134         return "";
 135 }
 136
 137 /*
 138  * Texture using thread: draws with successive textures and checks that the
 139  * correct color is drawn.  Return NULL on failure, else non-NULL.
 140  */
 141 static void *
 142 draw_func(void *arg)
 143 {
 144         int count = 0;
 145         int ret;
 146
 147         ret = glXMakeCurrent(dpy, draw_win, draw_ctx);
 148         assert(ret);
 149
 150         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 151
 152         glEnable(GL_TEXTURE_2D);
 153         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 154
 155         while (!quit && count < num_test) {
 156                 struct texture *tex = advance(&count, DRAW);
 157                 float expect[] = {
 158                         tex->color / 255.,
 159                         tex->color / 255.,
 160                         tex->color / 255.,
 161                 };
 162
 163                 assert(tex->user == DRAW);
 164
 165                 glBindTexture(GL_TEXTURE_2D, tex->id);
 166                 piglit_draw_rect_tex(0, 0, piglit_width, piglit_height,
 167                                      0, 0, 1, 1);
 168
 169                 /* first texture not filled so don't check it */
 170                 if (count > 0 &&
 171                         !piglit_probe_rect_rgb(0, 0, piglit_width,
 172                                                piglit_height, expect)) {
 173                         break;
 174                 }
 175         }
 176
 177         glXSwapBuffers(dpy, draw_win);
 178
 179         if (count < num_test) {
 180                 quit = true;
 181                 return NULL;
 182         }
 183
 184         return "";
 185 }
 186
 187 enum piglit_result
 188 draw(Display *dpy)
 189 {
 190         pthread_t draw_thread, load_thread;
 191         void *draw_ret, *load_ret;
 192         int ret, i;
 193         GLXContext my_ctx;
 194
 195         my_ctx = piglit_get_glx_context_share(dpy, visinfo, NULL);
 196         draw_ctx = piglit_get_glx_context_share(dpy, visinfo, my_ctx);
 197         load_ctx = piglit_get_glx_context_share(dpy, visinfo, my_ctx);
 198
 199         ret = glXMakeCurrent(dpy, draw_win, my_ctx);
 200         assert(ret);
 201         piglit_dispatch_default_init(PIGLIT_DISPATCH_GL);
 202
 203         glEnable(GL_TEXTURE_2D);
 204
 205         for (i = 0; i < ARRAY_SIZE(texture); ++i) {
 206                 glGenTextures(1, &texture[i].id);
 207                 texture[i].color = -1;
 208                 texture[i].user = NONE;
 209                 glBindTexture(GL_TEXTURE_2D, texture[i].id);
 210                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 211                                 GL_NEAREST);
 212                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 213                                 GL_NEAREST);
 214                 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_width, tex_height,
 215                              0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 216         }
 217         texture[0].user = DRAW;
 218         texture[1].user = LOAD;
 219
 220         pthread_mutex_init(&mutex, NULL);
 221
 222         pthread_create(&draw_thread, NULL, draw_func, NULL);
 223         pthread_create(&load_thread, NULL, load_func, NULL);
 224
 225         ret = pthread_join(draw_thread, &draw_ret);
 226         assert(ret == 0);
 227         ret = pthread_join(load_thread, &load_ret);
 228         assert(ret == 0);
 229
 230         pthread_mutex_destroy(&mutex);
 231
 232         glXDestroyContext(dpy, load_ctx);
 233         glXDestroyContext(dpy, draw_ctx);
 234         glXDestroyContext(dpy, my_ctx);
 235
 236         return draw_ret && load_ret ? PIGLIT_PASS : PIGLIT_FAIL;
 237 }
 238
 239 int
 240 main(int argc, char **argv)
 241 {
 242         int i;
 243         Pixmap pixmap;
 244
 245         for(i = 1; i < argc; ++i) {
 246                 if (!strcmp(argv[i], "-auto"))
 247                         piglit_automatic = 1;
 248                 else
 249                         fprintf(stderr, "Unknown option: %s\n", argv[i]);
 250         }
 251
 252         XInitThreads();
 253         dpy = XOpenDisplay(NULL);
 254         if (dpy == NULL) {
 255                 fprintf(stderr, "couldn't open display\n");
 256                 piglit_report_result(PIGLIT_FAIL);
 257         }
 258         visinfo = piglit_get_glx_visual(dpy);
 259         draw_win = piglit_get_glx_window(dpy, visinfo);
 260         pixmap = XCreatePixmap(dpy, DefaultRootWindow(dpy),
 261                 piglit_width, piglit_height, visinfo->depth);
 262         load_win = glXCreateGLXPixmap(dpy, visinfo, pixmap);
 263
 264         piglit_glx_event_loop(dpy, draw);
 265
 266         return 0;
 267 }