tests/fbo/fbo-flushing.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-flushing.c
  29  *
  30  * Tests that rendering to a texture then texturing from it gets correct
  31  * results.
  32  *
  33  * This caught a bug where the texture cache wasn't flushed appropriately
  34  * on the Intel drivers once additional batchbuffer flushing had been
  35  * removed.
  36  */
  37
  38 #include "piglit-util-gl.h"
  39
  40 #define TEX_WIDTH 128
  41 #define TEX_HEIGHT 128
  42
  43 PIGLIT_GL_TEST_CONFIG_BEGIN
  44
  45         config.supports_gl_compat_version = 10;
  46
  47         config.window_width = 300;
  48         config.window_height = 300;
  49         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  50         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  51
  52 PIGLIT_GL_TEST_CONFIG_END
  53
  54 enum piglit_result
  55 piglit_display(void)
  56 {
  57         GLboolean pass = GL_TRUE;
  58         int y, size;
  59         GLuint tex, fb;
  60         const float red[] =   {1, 0, 0, 0};
  61         const float green[] = {0, 1, 0, 0};
  62
  63         glClearColor(0.5, 0.5, 0.5, 0.5);
  64         glClear(GL_COLOR_BUFFER_BIT);
  65
  66         glGenTextures(1, &tex);
  67         glBindTexture(GL_TEXTURE_2D, tex);
  68         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
  69                      TEX_WIDTH, TEX_HEIGHT, 0,
  70                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  71
  72         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  73         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  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         /* For each power of two size we test, draw red to it, draw it to
  89          * the framebuffer, then draw green to it and draw it to the
  90          * framebuffer.
  91          *
  92          * Hopefully between these we'll catch any flushing fail.
  93          */
  94         y = 0;
  95         for (size = TEX_WIDTH; size > 0; size /= 2) {
  96                 glDisable(GL_TEXTURE_2D);
  97                 glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  98                 glColor4fv(red);
  99                 piglit_ortho_projection(TEX_WIDTH, TEX_HEIGHT, GL_FALSE);
 100                 piglit_draw_rect(0, y, size, size);
 101
 102                 glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 103                 glEnable(GL_TEXTURE_2D);
 104                 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 105                 piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 106                 piglit_draw_rect_tex(0, y, size, size, 0, 0, 1, 1);
 107
 108                 glDisable(GL_TEXTURE_2D);
 109                 glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
 110                 glColor4fv(green);
 111                 piglit_ortho_projection(TEX_WIDTH, TEX_HEIGHT, GL_FALSE);
 112                 piglit_draw_rect(0, y, size, size);
 113
 114                 glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 115                 glEnable(GL_TEXTURE_2D);
 116                 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 117                 piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 118                 piglit_draw_rect_tex(0, y, size, size, 0, 0, 1, 1);
 119                 y += size + 5;
 120         }
 121
 122         glDeleteFramebuffersEXT(1, &fb);
 123         glDeleteTextures(1, &tex);
 124
 125         y = 0;
 126         for (size = TEX_WIDTH; size > 0; size /= 2) {
 127                 pass = pass && piglit_probe_rect_rgb(0, y, size, size, green);
 128                 y += size + 5;
 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 }