tests/fbo/fbo-1d.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   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  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 /** @file fbo-1d.c
  29  *
  30  * Tests that rendering to a 1D texture and then drawing it to the framebuffer
  31  * succeeds.
  32  */
  33
  34 #include "piglit-util-gl.h"
  35
  36 #define BUF_WIDTH 32
  37
  38 PIGLIT_GL_TEST_CONFIG_BEGIN
  39
  40         config.supports_gl_compat_version = 10;
  41
  42         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_DEPTH;
  43         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47 static int
  48 create_1d_fbo(void)
  49 {
  50         GLuint tex, fb;
  51         GLenum status;
  52
  53         glGenTextures(1, &tex);
  54         glBindTexture(GL_TEXTURE_1D, tex);
  55
  56         glTexImage1D(GL_TEXTURE_1D, 0, GL_RGBA,
  57                      BUF_WIDTH,
  58                      0,
  59                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  60         if (!piglit_check_gl_error(GL_NO_ERROR))
  61                 piglit_report_result(PIGLIT_FAIL);
  62
  63         glGenFramebuffersEXT(1, &fb);
  64         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  65
  66         glFramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
  67                                   GL_COLOR_ATTACHMENT0_EXT,
  68                                   GL_TEXTURE_1D,
  69                                   tex,
  70                                   0);
  71
  72         if (!piglit_check_gl_error(GL_NO_ERROR))
  73                 piglit_report_result(PIGLIT_FAIL);
  74
  75         status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
  76         if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  77                 fprintf(stderr, "FBO incomplete\n");
  78                 goto done;
  79         }
  80
  81         glViewport(0, 0, BUF_WIDTH, 1);
  82         piglit_ortho_projection(BUF_WIDTH, 1, GL_FALSE);
  83
  84         /* left side: red */
  85         glColor4f(1.0, 0.0, 0.0, 0.0);
  86         piglit_draw_rect(0, 0, BUF_WIDTH / 2, 1);
  87
  88         /* right side: green */
  89         glColor4f(0.0, 1.0, 0.0, 0.0);
  90         piglit_draw_rect(BUF_WIDTH / 2, 0, BUF_WIDTH, 1);
  91
  92 done:
  93         glBindFramebufferEXT(GL_FRAMEBUFFER, piglit_winsys_fbo);
  94         glDeleteFramebuffersEXT(1, &fb);
  95
  96         return tex;
  97 }
  98
  99 static void
 100 draw_fbo_1d(int x, int y)
 101 {
 102         glViewport(0, 0, piglit_width, piglit_height);
 103         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 104
 105         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 106
 107         glEnable(GL_TEXTURE_1D);
 108         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 109         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 110         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 111         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 112         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 113         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
 114
 115         piglit_draw_rect_tex(x, y, BUF_WIDTH, 1,
 116                              0, 0, 1, 1);
 117 }
 118
 119 enum piglit_result
 120 piglit_display(void)
 121 {
 122         GLboolean pass = GL_TRUE;
 123         float red[] = {1,0,0,0};
 124         float green[] = {0,1,0,0};
 125         float *expected;
 126         int x;
 127         GLuint tex;
 128
 129         glClearColor(1.0, 1.0, 1.0, 1.0);
 130         glClear(GL_COLOR_BUFFER_BIT);
 131
 132         tex = create_1d_fbo();
 133
 134         draw_fbo_1d(10, 10);
 135
 136         for (x = 0; x < BUF_WIDTH; x++) {
 137                 if (x < BUF_WIDTH / 2)
 138                         expected = red;
 139                 else
 140                         expected = green;
 141
 142                 pass &= piglit_probe_pixel_rgb(10 + x, 10, expected);
 143         }
 144
 145         glDeleteTextures(1, &tex);
 146
 147         piglit_present_results();
 148
 149         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 150 }
 151
 152 void piglit_init(int argc, char **argv)
 153 {
 154         piglit_require_extension("GL_EXT_framebuffer_object");
 155 }