tests/spec/arb_direct_state_access/gettextureimage-formats.c

   1 /*
   2  * Copyright (c) 2011 VMware, Inc.
   3  * Copyright (c) 2014 Intel Corporation.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19  * NON-INFRINGEMENT.  IN NO EVENT SHALL VMWARE AND/OR THEIR SUPPLIERS
  20  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  21  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  */
  25
  26
  27 /**
  28  * @file gettextureimage-formats.c
  29  */
  30
  31
  32 #include "piglit-util-gl.h"
  33 #include "../fbo/fbo-formats.h"
  34 #include "dsa-utils.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 20;
  39         config.supports_gl_core_version = 31;
  40
  41         config.window_width = 600;
  42         config.window_height = 200;
  43         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  44         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 static const char *TestName = "gettextureimage-formats";
  49
  50 static const GLfloat clearColor[4] = { 0.4, 0.4, 0.4, 0.0 };
  51 static GLuint texture_id;
  52 static GLuint prog;
  53 static bool init_by_rendering;
  54
  55 #define TEX_SIZE 128
  56
  57 #define DO_BLEND 1
  58
  59
  60 /**
  61  * Make a simple texture image where red increases from left to right,
  62  * green increases from bottom to top, blue stays constant (50%) and
  63  * the alpha channel is a checkerboard pattern.
  64  * \return true for success, false if unsupported format
  65  */
  66 static bool
  67 make_texture_image(GLenum intFormat, GLubyte upperRightTexel[4])
  68 {
  69         GLubyte tex[TEX_SIZE][TEX_SIZE][4];
  70         int i, j;
  71         GLuint fb, status;
  72
  73         for (i = 0; i < TEX_SIZE; i++) {
  74                 for (j = 0; j < TEX_SIZE; j++) {
  75                         tex[i][j][0] = j * 255 / TEX_SIZE;
  76                         tex[i][j][1] = i * 255 / TEX_SIZE;
  77                         tex[i][j][2] = 128;
  78                         if (((i >> 4) ^ (j >> 4)) & 1)
  79                                 tex[i][j][3] = 255;  /* opaque */
  80                         else
  81                                 tex[i][j][3] = 125;     /* transparent */
  82                 }
  83         }
  84
  85         memcpy(upperRightTexel, tex[TEX_SIZE-1][TEX_SIZE-1], 4);
  86
  87         if (init_by_rendering) {
  88                 /* Initialize the mipmap levels. */
  89                 for (i = TEX_SIZE, j = 0; i; i >>= 1, j++) {
  90                         glTexImage2D(GL_TEXTURE_2D, j, intFormat, i, i, 0,
  91                                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  92                 }
  93
  94                 /* Initialize the texture with glDrawPixels. */
  95                 glGenFramebuffers(1, &fb);
  96                 glBindFramebuffer(GL_FRAMEBUFFER, fb);
  97                 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
  98                                        GL_TEXTURE_2D, texture_id, 0);
  99                 status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
 100                 if (status != GL_FRAMEBUFFER_COMPLETE) {
 101                         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 102                         glDeleteFramebuffers(1, &fb);
 103                         return false;
 104                 }
 105
 106                 glViewport(0, 0, TEX_SIZE, TEX_SIZE);
 107
 108                 glWindowPos2iARB(0, 0);
 109                 glDrawPixels(TEX_SIZE, TEX_SIZE, GL_RGBA, GL_UNSIGNED_BYTE, tex);
 110                 glGenerateTextureMipmap(texture_id);
 111
 112                 glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 113                 glDeleteFramebuffers(1, &fb);
 114                 glViewport(0, 0, piglit_width, piglit_height);
 115         } else {
 116                 glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
 117                 glTexImage2D(GL_TEXTURE_2D, 0, intFormat, TEX_SIZE, TEX_SIZE, 0,
 118                              GL_RGBA, GL_UNSIGNED_BYTE, tex);
 119         }
 120
 121         return glGetError() == GL_NO_ERROR;
 122 }
 123
 124 static GLfloat
 125 ubyte_to_float(GLubyte b, GLint bits)
 126 {
 127         if (bits <= 8) {
 128                 GLint b2 = b >> (8 - bits);
 129                 GLint max = 255 >> (8 - bits);
 130                 return b2 / (float) max;
 131         } else {
 132                 return b / 255.0;
 133         }
 134 }
 135
 136
 137 static GLfloat
 138 bits_to_tolerance(GLint bits, bool compressed)
 139 {
 140         GLfloat t;
 141
 142         if (bits == 0) {
 143                 return 0.25;
 144         } else if (bits == 1) {
 145                 return 0.5;
 146         } else if (bits > 8) {
 147                 /* The original texture was specified as GLubyte and we
 148                  * assume that the window/surface is 8-bits/channel.
 149                  */
 150                 t = 4.0 / 255;
 151         } else {
 152                 t = 4.0 / (1 << (bits - 1));
 153         }
 154
 155         if (compressed) {
 156                 /* Use a fudge factor.  The queries for GL_TEXTURE_RED/
 157                  * GREEN/BLUE/ALPHA_SIZE don't return well-defined values for
 158                  * compressed formats so using them is unreliable.  This is
 159                  * pretty loose, but good enough to catch some Mesa bugs during
 160                  * development.
 161                  */
 162                 t = 0.3;
 163         }
 164         return t;
 165 }
 166
 167
 168 static void
 169 compute_expected_color(const struct format_desc *fmt,
 170                        const GLubyte upperRightTexel[4],
 171                        GLfloat expected[4], GLfloat tolerance[4])
 172 {
 173         GLfloat texel[4];
 174         GLint compressed;
 175         int bits[4];
 176
 177         bits[0] = bits[1] = bits[2] = bits[3] = 0;
 178
 179         /* Handle special cases first */
 180         if (fmt->internalformat == GL_R11F_G11F_B10F_EXT) {
 181                 bits[0] = bits[1] = bits[2] = 8;
 182                 bits[3] = 0;
 183                 texel[0] = ubyte_to_float(upperRightTexel[0], bits[0]);
 184                 texel[1] = ubyte_to_float(upperRightTexel[1], bits[1]);
 185                 texel[2] = ubyte_to_float(upperRightTexel[2], bits[2]);
 186                 texel[3] = 1.0;
 187                 compressed = GL_FALSE;
 188         } else {
 189                 GLint r, g, b, a, l, i;
 190                 GLenum baseFormat = 0;
 191
 192                 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_RED_SIZE, &r);
 193                 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &g);
 194                 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_SIZE, &b);
 195                 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &a);
 196                 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_LUMINANCE_SIZE, &l);
 197                 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTENSITY_SIZE, &i);
 198                 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED, &compressed);
 199
 200                 if (0)
 201                         printf("r=%d g=%d b=%d a=%d l=%d i=%d\n", r, g, b, a, l, i);
 202
 203                 if (i > 0) {
 204                         baseFormat = GL_INTENSITY;
 205                         bits[0] = i;
 206                         bits[1] = 0;
 207                         bits[2] = 0;
 208                         bits[3] = i;
 209                         texel[0] = ubyte_to_float(upperRightTexel[0], bits[0]);
 210                         texel[1] = 0.0;
 211                         texel[2] = 0.0;
 212                         texel[3] = ubyte_to_float(upperRightTexel[0], bits[3]);
 213                 } else if (a > 0) {
 214                         if (l > 0) {
 215                                 baseFormat = GL_LUMINANCE_ALPHA;
 216                                 bits[0] = l;
 217                                 bits[1] = 0;
 218                                 bits[2] = 0;
 219                                 bits[3] = a;
 220                                 texel[0] = ubyte_to_float(upperRightTexel[0], bits[0]);
 221                                 texel[1] = 0.0;
 222                                 texel[2] = 0.0;
 223                                 texel[3] = ubyte_to_float(upperRightTexel[3], bits[3]);
 224                         } else if (r > 0 && g > 0 && b > 0) {
 225                                 baseFormat = GL_RGBA;
 226                                 bits[0] = r;
 227                                 bits[1] = g;
 228                                 bits[2] = b;
 229                                 bits[3] = a;
 230                                 texel[0] = ubyte_to_float(upperRightTexel[0], bits[0]);
 231                                 texel[1] = ubyte_to_float(upperRightTexel[1], bits[1]);
 232                                 texel[2] = ubyte_to_float(upperRightTexel[2], bits[2]);
 233                                 texel[3] = ubyte_to_float(upperRightTexel[3], bits[3]);
 234                         } else if (r == 0 && g == 0 && b == 0) {
 235                                 baseFormat = GL_ALPHA;
 236                                 bits[0] = 0;
 237                                 bits[1] = 0;
 238                                 bits[2] = 0;
 239                                 bits[3] = a;
 240                                 texel[0] = 0.0;
 241                                 texel[1] = 0.0;
 242                                 texel[2] = 0.0;
 243                                 texel[3] = ubyte_to_float(upperRightTexel[3], bits[3]);
 244                         } else {
 245                                 baseFormat = 0;  /* ??? */
 246                                 texel[0] = 0.0;
 247                                 texel[1] = 0.0;
 248                                 texel[2] = 0.0;
 249                                 texel[3] = 0.0;
 250                         }
 251                 } else if (l > 0) {
 252                         baseFormat = GL_LUMINANCE;
 253                         bits[0] = l;
 254                         bits[1] = 0;
 255                         bits[2] = 0;
 256                         bits[3] = 0;
 257                         texel[0] = ubyte_to_float(upperRightTexel[0], bits[0]);
 258                         texel[1] = 0.0;
 259                         texel[2] = 0.0;
 260                         texel[3] = 1.0;
 261                 } else if (r > 0) {
 262                         if (g > 0) {
 263                                 if (b > 0) {
 264                                         baseFormat = GL_RGB;
 265                                         bits[0] = r;
 266                                         bits[1] = g;
 267                                         bits[2] = b;
 268                                         bits[3] = 0;
 269                                         texel[0] = ubyte_to_float(upperRightTexel[0], bits[0]);
 270                                         texel[1] = ubyte_to_float(upperRightTexel[1], bits[1]);
 271                                         texel[2] = ubyte_to_float(upperRightTexel[2], bits[2]);
 272                                         texel[3] = 1.0;
 273                                 } else {
 274                                         baseFormat = GL_RG;
 275                                         bits[0] = r;
 276                                         bits[1] = g;
 277                                         bits[2] = 0;
 278                                         bits[3] = 0;
 279                                         texel[0] = ubyte_to_float(upperRightTexel[0], bits[0]);
 280                                         texel[1] = ubyte_to_float(upperRightTexel[1], bits[1]);
 281                                         texel[2] = 0.0;
 282                                         texel[3] = 1.0;
 283                                 }
 284                         } else {
 285                                 baseFormat = GL_RED;
 286                                 bits[0] = r;
 287                                 bits[1] = 0;
 288                                 bits[2] = 0;
 289                                 bits[3] = 0;
 290                                 texel[0] = ubyte_to_float(upperRightTexel[0], bits[0]);
 291                                 texel[1] = 0.0;
 292                                 texel[2] = 0.0;
 293                                 texel[3] = 1.0;
 294                         }
 295                 } else {
 296                         assert(!"Unexpected texture component sizes");
 297                         texel[0] = 0.0;
 298                         texel[1] = 0.0;
 299                         texel[2] = 0.0;
 300                         texel[3] = 0.0;
 301                 }
 302
 303                 (void) baseFormat;  /* not used, at this time */
 304         }
 305
 306         /* compute texel color blended with background color */
 307 #if DO_BLEND
 308         expected[0] = texel[0] * texel[3] + clearColor[0] * (1.0 - texel[3]);
 309         expected[1] = texel[1] * texel[3] + clearColor[1] * (1.0 - texel[3]);
 310         expected[2] = texel[2] * texel[3] + clearColor[2] * (1.0 - texel[3]);
 311         expected[3] = texel[3] * texel[3] + clearColor[3] * (1.0 - texel[3]);
 312 #else
 313         expected[0] = texel[0];
 314         expected[1] = texel[1];
 315         expected[2] = texel[2];
 316         expected[3] = texel[3];
 317 #endif
 318
 319         assert(expected[0] == expected[0]);
 320
 321         tolerance[0] = bits_to_tolerance(bits[0], compressed);
 322         tolerance[1] = bits_to_tolerance(bits[1], compressed);
 323         tolerance[2] = bits_to_tolerance(bits[2], compressed);
 324         tolerance[3] = bits_to_tolerance(bits[3], compressed);
 325 }
 326
 327
 328 static bool
 329 colors_equal(const GLfloat expected[4], const GLfloat pix[4],
 330              GLfloat tolerance[4])
 331 {
 332         if (fabsf(expected[0] - pix[0]) > tolerance[0] ||
 333                  fabsf(expected[1] - pix[1]) > tolerance[1] ||
 334                  fabsf(expected[2] - pix[2]) > tolerance[2] ||
 335                  fabsf(expected[3] - pix[3]) > tolerance[3]) {
 336                 return false;
 337         }
 338         return true;
 339 }
 340
 341
 342 static bool
 343 test_format(const struct test_desc *test,
 344             const struct format_desc *fmt)
 345 {
 346         int x, y;
 347         int w = TEX_SIZE, h = TEX_SIZE;
 348         GLfloat readback[TEX_SIZE][TEX_SIZE][4];
 349         GLubyte upperRightTexel[4];
 350         int level;
 351         GLfloat expected[4], pix[4], tolerance[4];
 352         bool pass = true;
 353
 354         glClear(GL_COLOR_BUFFER_BIT);
 355
 356         /* The RGBA_DXT1 formats seem to expose a Mesa/libtxc_dxtn bug.
 357          * Just skip them for now.  Testing the other compressed formats
 358          * is good enough.
 359          */
 360         if (fmt->internalformat != GL_COMPRESSED_RGBA_S3TC_DXT1_EXT &&
 361             fmt->internalformat != GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT) {
 362                 /* init texture image */
 363                 if (!make_texture_image(fmt->internalformat, upperRightTexel))
 364                         return true; /* unsupported = OK */
 365
 366                 x = 10;
 367                 y = 40;
 368
 369                 compute_expected_color(fmt, upperRightTexel, expected, tolerance);
 370
 371                 /* Draw with the texture */
 372                 glUseProgram(prog);
 373                 dsa_set_xform(prog, piglit_width, piglit_height);
 374 #if DO_BLEND
 375                 glEnable(GL_BLEND);
 376 #endif
 377                 piglit_draw_rect_tex(x, y, w, h,  0.0, 0.0, 1.0, 1.0);
 378                 glUseProgram(0);
 379                 glDisable(GL_BLEND);
 380
 381                 x += TEX_SIZE + 20;
 382
 383                 level = 0;
 384                 while (w > 0) {
 385                         /* Get the texture image */
 386                         glGetTextureImage(texture_id, level, GL_RGBA,
 387                                           GL_FLOAT, sizeof(readback),
 388                                           readback);
 389
 390                         /* Draw the texture image */
 391                         glWindowPos2iARB(x, y);
 392 #if DO_BLEND
 393                         glEnable(GL_BLEND);
 394 #endif
 395                         glDrawPixels(w, h, GL_RGBA, GL_FLOAT, readback);
 396                         glDisable(GL_BLEND);
 397
 398                         if (level <= 2) {
 399                                 GLint rx = x + w-1;
 400                                 GLint ry = y + h-1;
 401                                 glReadPixels(rx, ry, 1, 1, GL_RGBA, GL_FLOAT, pix);
 402                                 if (!colors_equal(expected, pix, tolerance)) {
 403                                         printf("%s failure: format: %s, level %d at pixel(%d, %d)\n",
 404                                                TestName,
 405                                                get_format_name(
 406                                                        fmt->internalformat),
 407                                                level, rx, ry);
 408                                         printf(" Expected (%f, %f, %f, %f)\n",
 409                                                          expected[0], expected[1], expected[2], expected[3]);
 410                                         printf("         Found (%f, %f, %f, %f)\n",
 411                                                          pix[0], pix[1], pix[2], pix[3]);
 412                                         printf("Tolerance (%f, %f, %f, %f)\n",
 413                                                          tolerance[0], tolerance[1], tolerance[2], tolerance[3]);
 414                                         pass = false;
 415                                 }
 416                         }
 417
 418                         x += w + 20;
 419                         w /= 2;
 420                         h /= 2;
 421                         level++;
 422                 }
 423
 424         }
 425
 426         piglit_present_results();
 427
 428         return pass;
 429 }
 430
 431
 432 /**
 433  * Is the given set of formats supported?
 434  * This checks if required extensions are present and if this piglit test
 435  * can actually grok the formats.
 436  */
 437 static bool
 438 supported_format_set(const struct test_desc *set)
 439 {
 440         if (!supported(set))
 441                 return false;
 442
 443         if (set->format == ext_texture_integer ||
 444             set->format == ext_packed_depth_stencil ||
 445             set->format == arb_texture_rg_int ||
 446             set->format == arb_depth_texture ||
 447             set->format == arb_depth_buffer_float) {
 448                 /* texture_integer requires a fragment shader, different
 449                  * glTexImage calls.  Depth/stencil formats not implemented.
 450                  */
 451                 return false;
 452         }
 453
 454         return true;
 455 }
 456
 457
 458 static bool
 459 test_all_formats(void)
 460 {
 461         bool pass = true;
 462         int i, j;
 463
 464         for (i = 0; i < ARRAY_SIZE(test_sets); i++) {
 465                 const struct test_desc *set = &test_sets[i];
 466                 if (supported_format_set(set)) {
 467                         for (j = 0; j < set->num_formats; j++) {
 468                                 if (!test_format(set, &set->format[j])) {
 469                                         pass = false;
 470                                 }
 471                         }
 472                 }
 473         }
 474
 475         return pass;
 476 }
 477
 478
 479 enum piglit_result
 480 piglit_display(void)
 481 {
 482         bool pass;
 483
 484         piglit_ortho_projection(piglit_width, piglit_height, false);
 485
 486         if (piglit_automatic) {
 487                 pass = test_all_formats();
 488         } else {
 489                 const struct test_desc *set = &test_sets[test_index];
 490                 if (supported_format_set(set)) {
 491                         pass = test_format(set, &set->format[format_index]);
 492                 } else {
 493                         /* unsupported format - not a failure */
 494                         pass = true;
 495                         glClear(GL_COLOR_BUFFER_BIT);
 496                         piglit_present_results();
 497                 }
 498         }
 499
 500         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 501 }
 502
 503 void
 504 piglit_init(int argc, char **argv)
 505 {
 506         int i;
 507
 508         piglit_require_extension("GL_ARB_direct_state_access");
 509
 510         fbo_formats_init(1, argv, !piglit_automatic);
 511         (void) fbo_formats_display;
 512
 513         for (i = 1; i < argc; i++) {
 514                 if (strcmp(argv[i], "init-by-rendering") == 0) {
 515                         init_by_rendering = true;
 516                         puts("The textures will be initialized by rendering "
 517                              "to them using glDrawPixels.");
 518                         break;
 519                 }
 520         }
 521
 522         glGenTextures(1, &texture_id);
 523         glBindTexture(GL_TEXTURE_2D, texture_id);
 524         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 525         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 526
 527         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 528
 529         glClearColor(clearColor[0], clearColor[1], clearColor[2], clearColor[3]);
 530
 531         prog = dsa_create_program(GL_TEXTURE_2D);
 532 }