tests/general/framebuffer-srgb.c

   1 /*
   2  * Copyright © 2010 Red Hat
   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  * Authors:
  24  *    Dave Airlie
  25  *
  26  */
  27
  28 /** @file framebuffer-srgb
  29  *
  30  * Test the EXT_framebuffer_sRGB API changes
  31  * this test enables even when the extension isn't available, and confirms
  32  * the API acts correctly in that case.
  33  */
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_compat_version = 10;
  40
  41         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  42
  43 PIGLIT_GL_TEST_CONFIG_END
  44
  45 /* size of texture/renderbuffer (power of two) */
  46 #define FBO_SIZE 128
  47
  48 /* do some basic API tests */
  49 static GLboolean
  50 framebuffer_srgb_api_no_ext(void)
  51 {
  52         GLboolean pass = GL_TRUE;
  53         GLboolean boolmode = GL_FALSE;
  54         GLenum ret;
  55
  56         glGetBooleanv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &boolmode);
  57         ret = glGetError();
  58         if (ret != GL_INVALID_ENUM || boolmode) {
  59                 printf("no extension but no enum error or enabled\n");
  60                 pass = GL_FALSE;
  61         }
  62
  63         (void)glIsEnabled(GL_FRAMEBUFFER_SRGB_EXT);
  64         ret = glGetError();
  65         if (ret != GL_INVALID_ENUM) {
  66                 printf("no invalid enum on glIsEnabled(GL_FRAMEBUFFER_SRGB_EXT)\n");
  67                 pass = GL_FALSE;
  68         }
  69
  70         glEnable(GL_FRAMEBUFFER_SRGB_EXT);
  71         ret = glGetError();
  72         if (ret != GL_INVALID_ENUM) {
  73                 printf("no invalid enum on glEnable(GL_FRAMEBUFFER_SRGB_EXT)\n");
  74                 pass = GL_FALSE;
  75         }
  76
  77         glDisable(GL_FRAMEBUFFER_SRGB_EXT);
  78         ret = glGetError();
  79         if (ret != GL_INVALID_ENUM) {
  80                 printf("no invalid enum on glDisable(GL_FRAMEBUFFER_SRGB_EXT)\n");
  81                 pass = GL_FALSE;
  82         }
  83         return pass;
  84 }
  85
  86 /* do some basic API tests */
  87 static GLboolean
  88 framebuffer_srgb_api_ext(void)
  89 {
  90         GLboolean pass = GL_TRUE;
  91         GLboolean boolmode;
  92         GLenum ret;
  93         GLboolean is_enabled;
  94         /* check if visual supports API */
  95         glGetBooleanv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &boolmode);
  96         ret = glGetError();
  97         if (ret != 0) {
  98                 printf("unexpected error glGetBooleanv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT) %d\n", ret);
  99                 pass = GL_FALSE;
 100         }
 101
 102         (void) glIsEnabled(GL_FRAMEBUFFER_SRGB_EXT); /* ignore return value */
 103         ret = glGetError();
 104         if (ret != 0) {
 105                 printf("unexpected error getting IsEnabled %d\n", ret);
 106                 pass = GL_FALSE;
 107         }
 108
 109         /* should be possible to enable/disable independent of capable bit */
 110         glEnable(GL_FRAMEBUFFER_SRGB_EXT);
 111         is_enabled = glIsEnabled(GL_FRAMEBUFFER_SRGB_EXT);
 112         if (!is_enabled) {
 113                 printf("SRGB not enabled after calling glEnable\n");
 114                 pass = GL_FALSE;
 115         }
 116
 117         glDisable(GL_FRAMEBUFFER_SRGB_EXT);
 118         is_enabled = glIsEnabled(GL_FRAMEBUFFER_SRGB_EXT);
 119         if (is_enabled) {
 120                 printf("SRGB not disabled after calling glDisable\n");
 121                 pass = GL_FALSE;
 122         }
 123         return pass;
 124 }
 125
 126 /**
 127  * Common code for framebuffer and FBO tests.
 128  */
 129 static GLboolean
 130 test_srgb(void)
 131 {
 132         GLboolean pass = GL_TRUE;
 133         GLboolean srgb_capable;
 134         float green[] = {0, 0.3, 0, 0};
 135         float expected_green[4];
 136         float expected_blend[4];
 137
 138         /*
 139          * Note: the window-system framebuffer may or may not be sRGB capable.
 140          * But the user-created FBO should be sRGB capable.
 141          */
 142         glGetBooleanv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 143
 144         glDisable(GL_BLEND);
 145         glClear(GL_COLOR_BUFFER_BIT);
 146         glDisable(GL_FRAMEBUFFER_SRGB_EXT);
 147         glColor4fv(green);
 148
 149         /*
 150          * First square: draw green square without sRGB and no blending
 151          */
 152         piglit_draw_rect(0, 0, 20, 20);
 153
 154         /*
 155          * Second square: draw a green square with sRGB enabled and no blending
 156          */
 157         glEnable(GL_FRAMEBUFFER_SRGB_EXT);
 158         piglit_draw_rect(20, 0, 20, 20);
 159
 160         /*
 161          * Third square: draw green square, then blend/add another on top of it
 162          */
 163         glEnable(GL_FRAMEBUFFER_SRGB_EXT);
 164         piglit_draw_rect(40, 0, 20, 20);
 165         glEnable(GL_BLEND);
 166         glBlendFunc(GL_ONE, GL_ONE);
 167         piglit_draw_rect(40, 0, 20, 20);
 168         glDisable(GL_BLEND);
 169         glDisable(GL_FRAMEBUFFER_SRGB_EXT);
 170
 171         /*
 172          * Check first square.
 173          */
 174         if (!piglit_probe_rect_rgb(0, 0, 20, 20, green))
 175                 pass = GL_FALSE;
 176         /* check pixel path */
 177         glEnable(GL_FRAMEBUFFER_SRGB_EXT);
 178         if (!piglit_probe_rect_rgb(0, 0, 20, 20, green))
 179                 pass = GL_FALSE;
 180         glDisable(GL_FRAMEBUFFER_SRGB_EXT);
 181
 182         /*
 183          * Check second square
 184          */
 185         memcpy(expected_green, green, sizeof(float) * 4);
 186         if (srgb_capable)
 187                 expected_green[1] = piglit_linear_to_srgb(green[1]);
 188         if (!piglit_probe_rect_rgb(20, 0, 20, 20, expected_green))
 189                 pass = GL_FALSE;
 190         /* check it doesn't affect the pixel path */
 191         glEnable(GL_FRAMEBUFFER_SRGB_EXT);
 192         if (!piglit_probe_rect_rgb(20, 0, 20, 20, expected_green))
 193                 pass = GL_FALSE;
 194         glDisable(GL_FRAMEBUFFER_SRGB_EXT);
 195
 196         /*
 197          * Check third square
 198          */
 199         memcpy(expected_blend, green, sizeof(float) * 4);
 200         if (srgb_capable)
 201                 expected_blend[1] = piglit_linear_to_srgb(green[1] * 2.0);
 202         else
 203                 expected_blend[1] = green[1] * 2.0;
 204         if (!piglit_probe_rect_rgb(40, 0, 20, 20, expected_blend))
 205                 pass = GL_FALSE;
 206
 207         return pass;
 208 }
 209
 210 static GLboolean
 211 framebuffer_srgb_non_fbo(void)
 212 {
 213         GLboolean pass;
 214
 215         glViewport(0, 0, piglit_width, piglit_height);
 216         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 217
 218         pass = test_srgb();
 219         piglit_present_results();
 220         return pass;
 221 }
 222
 223 static GLuint
 224 make_fbo(int w, int h)
 225 {
 226         GLuint tex;
 227         GLuint fb;
 228         GLenum status;
 229
 230         glGenFramebuffersEXT(1, &fb);
 231         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
 232
 233         glGenTextures(1, &tex);
 234         glBindTexture(GL_TEXTURE_2D, tex);
 235         glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8_ALPHA8_EXT,
 236                      w, h, 0,
 237                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 238
 239         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 240         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 241
 242         glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
 243                                   GL_COLOR_ATTACHMENT0_EXT,
 244                                   GL_TEXTURE_2D,
 245                                   tex,
 246                                   0);
 247         if (!piglit_check_gl_error(GL_NO_ERROR))
 248                 piglit_report_result(PIGLIT_FAIL);
 249
 250         status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
 251         if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 252                 fprintf(stderr, "fbo incomplete (status = 0x%04x)\n", status);
 253                 piglit_report_result(PIGLIT_SKIP);
 254         }
 255
 256         return fb;
 257 }
 258
 259 static void
 260 draw_fbo(int x, int y)
 261 {
 262         glViewport(0, 0, piglit_width, piglit_height);
 263         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 264
 265         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 266
 267         glEnable(GL_TEXTURE_2D);
 268         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 269         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 270         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 271         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 272         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 273         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
 274
 275         glClear(GL_COLOR_BUFFER_BIT);
 276         piglit_draw_rect_tex(x, y, FBO_SIZE, FBO_SIZE,
 277                              0, 0, 1, 1);
 278         glDisable(GL_TEXTURE_2D);
 279 }
 280
 281 static GLboolean
 282 framebuffer_srgb_fbo(void)
 283 {
 284         GLboolean pass = GL_TRUE;
 285         int fbo_width = FBO_SIZE;
 286         int fbo_height = FBO_SIZE;
 287         GLuint fbo;
 288
 289         fbo = make_fbo(fbo_width, fbo_height);
 290         glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fbo);
 291         glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fbo);
 292         glViewport(0, 0, fbo_width, fbo_height);
 293
 294         piglit_ortho_projection(fbo_width, fbo_height, GL_FALSE);
 295
 296         pass = test_srgb();
 297
 298         glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 299         glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 300         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 301
 302         draw_fbo(0, 0);
 303         piglit_present_results();
 304         glDeleteFramebuffersEXT(1, &fbo);
 305         return pass;
 306 }
 307
 308 enum piglit_result
 309 piglit_display(void)
 310 {
 311         GLboolean pass = GL_TRUE;
 312         GLboolean have_srgb_ext = GL_FALSE;
 313
 314         if (piglit_is_extension_supported("GL_ARB_framebuffer_sRGB"))
 315                 have_srgb_ext = GL_TRUE;
 316
 317         if (!have_srgb_ext) {
 318                 pass = framebuffer_srgb_api_no_ext();
 319                 goto out;
 320         }
 321
 322         pass = framebuffer_srgb_api_ext();
 323         if (pass == GL_TRUE)
 324                 pass = framebuffer_srgb_non_fbo();
 325
 326         if (pass == GL_TRUE)
 327                 pass = framebuffer_srgb_fbo();
 328
 329  out:
 330         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 331 }
 332
 333
 334 static void reshape(int width, int height)
 335 {
 336         piglit_width = width;
 337         piglit_height = height;
 338
 339         piglit_ortho_projection(width, height, GL_FALSE);
 340 }
 341
 342 void
 343 piglit_init(int argc, char **argv)
 344 {
 345         reshape(piglit_width, piglit_height);
 346         piglit_require_extension("GL_EXT_framebuffer_object");
 347         piglit_require_extension("GL_EXT_framebuffer_blit");
 348
 349         glClearColor(0.5, 0.5, 0.5, 1.0);
 350 }