tests/fbo/fbo-flushing-2.c

   1 /*
   2  * Copyright © 2009,2011 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-flushing-2.c
  29  *
  30  * Tests that rendering to a texture then texturing from it gets
  31  * correct results.
  32  *
  33  * This caught a bug where the texture cache wasn't flushed
  34  * appropriately on the Intel drivers once additional state changes
  35  * had been removed.
  36  */
  37
  38 #include "piglit-util-gl.h"
  39
  40 #define TEX_WIDTH 8
  41 #define TEX_HEIGHT 8
  42
  43 PIGLIT_GL_TEST_CONFIG_BEGIN
  44
  45         config.supports_gl_compat_version = 10;
  46
  47         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  48         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  49
  50 PIGLIT_GL_TEST_CONFIG_END
  51
  52 enum piglit_result
  53 piglit_display(void)
  54 {
  55         GLboolean pass = GL_TRUE;
  56         int x, y;
  57         GLuint tex, fb;
  58         float blue[] =   {1, 0, 0, 0};
  59         float green[] = {0, 1, 0, 0};
  60         bool draw_green;
  61         float *draw_colors[] = {blue, green};
  62         float w_screen = 2.0f * TEX_WIDTH / piglit_width;
  63         float h_screen = 2.0f * TEX_HEIGHT / piglit_height;
  64
  65         glGenTextures(1, &tex);
  66         glBindTexture(GL_TEXTURE_2D, tex);
  67         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
  68                      TEX_WIDTH, TEX_HEIGHT, 0,
  69                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  70
  71         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  72         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  73         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
  74
  75         glGenFramebuffersEXT(1, &fb);
  76         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  77         glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
  78                                   GL_COLOR_ATTACHMENT0_EXT,
  79                                   GL_TEXTURE_2D,
  80                                   tex,
  81                                   0);
  82         if (!piglit_check_gl_error(GL_NO_ERROR))
  83                 piglit_report_result(PIGLIT_FAIL);
  84
  85         assert(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) ==
  86                GL_FRAMEBUFFER_COMPLETE_EXT);
  87
  88         draw_green = true;
  89         for (y = 0; y <= piglit_height - TEX_HEIGHT; y += TEX_HEIGHT) {
  90                 float y_screen = -1.0 + 2.0 * ((float)y / piglit_height);
  91
  92                 for (x = 0; x <= piglit_width - TEX_WIDTH; x += TEX_WIDTH) {
  93                         float x_screen = -1.0 + 2.0 * ((float)x / piglit_width);
  94
  95                         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  96                         glDisable(GL_TEXTURE_2D);
  97                         glColor4fv(draw_colors[draw_green]);
  98                         piglit_draw_rect(-1, -1, 2, 2);
  99
 100                         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 101                         glEnable(GL_TEXTURE_2D);
 102                         piglit_draw_rect_tex(x_screen, y_screen,
 103                                              w_screen, h_screen,
 104                                              0, 0,
 105                                              1, 1);
 106
 107                         draw_green = !draw_green;
 108                 }
 109                 /* Make it a checkerboard. */
 110                 draw_green = !draw_green;
 111         }
 112
 113         glDeleteFramebuffersEXT(1, &fb);
 114         glDeleteTextures(1, &tex);
 115
 116         draw_green = true;
 117         for (y = 0; y <= piglit_height - TEX_HEIGHT; y += TEX_HEIGHT) {
 118                 for (x = 0; x <= piglit_width - TEX_WIDTH; x += TEX_WIDTH) {
 119                         float *expected = draw_colors[draw_green];
 120
 121                         pass = pass && piglit_probe_rect_rgb(x, y,
 122                                                              TEX_WIDTH,
 123                                                              TEX_HEIGHT,
 124                                                              expected);
 125
 126                         draw_green = !draw_green;
 127                 }
 128                 draw_green = !draw_green;
 129         }
 130
 131         piglit_present_results();
 132
 133         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 134 }
 135
 136 void
 137 piglit_init(int argc, char **argv)
 138 {
 139         piglit_require_extension("GL_EXT_framebuffer_object");
 140 }