tests/spec/gl-1.2/texture-base-level.c

   1 /*
   2  * Copyright 2016 VMware, 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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /*
  25  * Test a texture construction / base level issue in Mesa/gallium state tracker.
  26  * The texture images are defined for levels 2, 3, ... and the height of
  27  * all images is one.
  28  * Mesa was asserting in this case.
  29  *
  30  * Brian Paul
  31  * 6 June 2016
  32  */
  33
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38         config.supports_gl_compat_version = 12;
  39         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  40 PIGLIT_GL_TEST_CONFIG_END
  41
  42
  43 const GLubyte gray = 220;
  44
  45
  46 void
  47 piglit_init(int argc, char **argv)
  48 {
  49         const int width0 = 512;
  50         const int height = 1;
  51         const int base_level = 2;
  52         GLuint tex;
  53         int level;
  54         int nr_bytes;
  55         GLubyte *texdata;
  56
  57         glGenTextures(1, &tex);
  58         glBindTexture(GL_TEXTURE_2D, tex);
  59
  60         nr_bytes = (width0 >> base_level) * height * 4 * sizeof(GLubyte);
  61         texdata = malloc(nr_bytes);
  62         memset(texdata, gray, nr_bytes);
  63
  64         for (level = base_level; ; level++) {
  65                 int width = width0 >> level;
  66                 if (width == 0)
  67                         break;
  68                 printf("level %d: %d x %d\n", level, width, height);
  69                 glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, width, height, 0,
  70                              GL_RGBA, GL_UNSIGNED_BYTE, texdata);
  71         }
  72
  73         free(texdata);
  74
  75         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
  76         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  77
  78         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, base_level);
  79
  80         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
  81 }
  82
  83
  84 enum piglit_result
  85 piglit_display(void)
  86 {
  87         const float exp_color[4] = {gray / 255.0f, gray / 255.0f,
  88                                     gray / 255.0f, gray / 255.0f};
  89         bool pass;
  90
  91         glClearColor(1, 0, 0, 0);
  92         glClear(GL_COLOR_BUFFER_BIT);
  93
  94         glEnable(GL_TEXTURE_2D);
  95
  96         piglit_draw_rect_tex(-1, -1, 2, 2, 0, 0, 1, 1);
  97
  98         pass = piglit_probe_pixel_rgba(piglit_width / 2, piglit_height / 2,
  99                                        exp_color);
 100
 101         piglit_present_results();
 102
 103         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 104 }