tests/spec/arb_clear_texture/simple.c

   1 /*
   2  * Copyright 2014 Ilia Mirkin
   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 simple.c
  25  *
  26  * A very simple test of basic ClearTexImage and ClearTexSubImage
  27  * functionality. Clears 2 textures, and puts them up side-by-side for
  28  * display.
  29  *
  30  * The output should look like
  31  *
  32  * +-----+--+--+
  33  * |     |  |  |
  34  * |     |  |  |
  35  * +-----+--+--+
  36  *
  37  * With the boxes from left to right being green, blue, and yellow.
  38  */
  39
  40 #include "piglit-util-gl.h"
  41
  42 PIGLIT_GL_TEST_CONFIG_BEGIN
  43
  44         config.supports_gl_compat_version = 13;
  45
  46         config.window_width = 128;
  47         config.window_height = 64;
  48         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  49         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  50
  51 PIGLIT_GL_TEST_CONFIG_END
  52
  53 static GLuint texture[2];
  54 static const float green[3] = {0.0, 1.0, 0.0};
  55 static const float red[3] = {1.0, 0.0, 0.0};
  56 static const float blue[3] = {0.0, 0.0, 1.0};
  57 static const float yellow[3] = {1.0, 1.0, 0.0};
  58
  59 void
  60 piglit_init(int argc, char **argv)
  61 {
  62         int i;
  63         float *color = malloc(sizeof(float) * 64 * 64 * 3);
  64
  65         piglit_require_extension("GL_ARB_clear_texture");
  66         piglit_require_extension("GL_EXT_framebuffer_object");
  67
  68         /* Create color data for texture */
  69         for (i = 0; i < 64 * 64; i++) {
  70                 memcpy(&color[i*3], &red[0], sizeof(red));
  71         }
  72
  73         glGenTextures(2, texture);
  74
  75         /* Initialize textures to all red. */
  76         glBindTexture(GL_TEXTURE_2D, texture[0]);
  77         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 64, 64,
  78                      0, GL_RGB, GL_FLOAT, color);
  79         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  80         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  81
  82         glBindTexture(GL_TEXTURE_2D, texture[1]);
  83         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 64, 64,
  84                      0, GL_RGB, GL_FLOAT, color);
  85         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  86         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  87
  88         free(color);
  89 }
  90
  91 enum piglit_result
  92 piglit_display(void)
  93 {
  94         bool pass = true;
  95
  96         if (!piglit_check_gl_error(GL_NO_ERROR))
  97                 piglit_report_result(PIGLIT_FAIL);
  98
  99         /* Clear the whole first texture with green */
 100         glClearTexImage(texture[0], 0, GL_RGB, GL_FLOAT, green);
 101         pass &= piglit_check_gl_error(GL_NO_ERROR);
 102
 103         /* Clear the left half of the second texture with blue */
 104         glClearTexSubImage(texture[1], 0,
 105                            0, 0, 0,
 106                            32, 64, 1,
 107                            GL_RGB, GL_FLOAT, blue);
 108         pass &= piglit_check_gl_error(GL_NO_ERROR);
 109         /* And the right half with yellow */
 110         glClearTexSubImage(texture[1], 0,
 111                            32, 0, 0,
 112                            32, 64, 1,
 113                            GL_RGB, GL_FLOAT, yellow);
 114         pass &= piglit_check_gl_error(GL_NO_ERROR);
 115
 116         /* Render both textures to the screen */
 117         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 118
 119         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 120         glEnable(GL_TEXTURE_2D);
 121         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 122
 123         glBindTexture(GL_TEXTURE_2D, texture[0]);
 124         piglit_draw_rect_tex(0, 0, 64, 64, 0, 0, 1, 1);
 125
 126         glBindTexture(GL_TEXTURE_2D, texture[1]);
 127         piglit_draw_rect_tex(64, 0, 64, 64, 0, 0, 1, 1);
 128
 129         glDisable(GL_TEXTURE_2D);
 130
 131         /* Check for the 3 separate regions */
 132         pass &= piglit_probe_rect_rgb(0, 0, 64, 64, green);
 133         pass &= piglit_probe_rect_rgb(64, 0, 32, 64, blue);
 134         pass &= piglit_probe_rect_rgb(96, 0, 32, 64, yellow);
 135
 136         piglit_present_results();
 137
 138         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 139 }