tests/fbo/fbo-drawbuffers2-colormask.c

   1 /*
   2  * Copyright © 2010 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-drawbuffers2-colormask.c
  29  *
  30  * Tests that individual color masks per render target with
  31  * EXT_draw_buffers2 works.
  32  */
  33
  34 #include "piglit-util-gl.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  41         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  42
  43 PIGLIT_GL_TEST_CONFIG_END
  44
  45 static GLboolean test_clear;
  46
  47 static GLuint
  48 attach_texture(int i)
  49 {
  50         GLuint tex;
  51
  52         glGenTextures(1, &tex);
  53         glBindTexture(GL_TEXTURE_2D, tex);
  54         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
  55                      piglit_width, piglit_height, 0,
  56                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  57
  58         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  59         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  60
  61         glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
  62                                   GL_COLOR_ATTACHMENT0_EXT + i,
  63                                   GL_TEXTURE_2D,
  64                                   tex,
  65                                   0);
  66         if (!piglit_check_gl_error(GL_NO_ERROR))
  67                 piglit_report_result(PIGLIT_FAIL);
  68
  69         return tex;
  70 }
  71
  72 enum piglit_result
  73 piglit_display(void)
  74 {
  75         GLboolean pass = GL_TRUE;
  76         GLuint tex0, tex1, fb;
  77         GLenum status;
  78         float white[] = {1, 1, 1, 1};
  79         float green[] = {0, 1, 0, 0};
  80         float blue[] = {0, 0, 1, 0};
  81         const GLenum attachments[] = {
  82                 GL_COLOR_ATTACHMENT0_EXT,
  83                 GL_COLOR_ATTACHMENT1_EXT,
  84         };
  85
  86         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  87
  88         glGenFramebuffersEXT(1, &fb);
  89         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  90
  91         tex0 = attach_texture(0);
  92         tex1 = attach_texture(1);
  93
  94         glDrawBuffersARB(2, attachments);
  95
  96         status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
  97         if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  98                 fprintf(stderr, "fbo incomplete (status = 0x%04x)\n", status);
  99                 piglit_report_result(PIGLIT_SKIP);
 100         }
 101
 102         /* Clear to black */
 103         glClearColor(0.0, 0.0, 0.0, 0.0);
 104         glClear(GL_COLOR_BUFFER_BIT);
 105
 106         /* Mask only green in RT 0, blue in RT 1, then try to draw in white */
 107         glColorMaskIndexedEXT(0, GL_FALSE, GL_TRUE, GL_FALSE, GL_FALSE);
 108         glColorMaskIndexedEXT(1, GL_FALSE, GL_FALSE, GL_TRUE, GL_FALSE);
 109
 110         if (test_clear) {
 111                 glClearColor(1.0, 1.0, 1.0, 1.0);
 112                 glClear(GL_COLOR_BUFFER_BIT);
 113         } else {
 114                 glColor4fv(white);
 115                 piglit_draw_rect(0, 0, piglit_width, piglit_height);
 116         }
 117
 118         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 119         glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
 120
 121         /* Draw the two textures to halves of the window. */
 122         glEnable(GL_TEXTURE_2D);
 123         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 124         glBindTexture(GL_TEXTURE_2D, tex0);
 125         piglit_draw_rect_tex(0, 0,
 126                              piglit_width / 2, piglit_height,
 127                              0, 0, 1, 1);
 128         glBindTexture(GL_TEXTURE_2D, tex1);
 129         piglit_draw_rect_tex(piglit_width / 2, 0,
 130                              piglit_width, piglit_height,
 131                              0, 0, 1, 1);
 132         glDisable(GL_TEXTURE_2D);
 133         glDeleteTextures(1, &tex0);
 134         glDeleteTextures(1, &tex1);
 135         glDeleteFramebuffersEXT(1, &fb);
 136
 137         pass = pass && piglit_probe_rect_rgb(0, 0, piglit_width/2,
 138                                              piglit_height, green);
 139         pass = pass && piglit_probe_rect_rgb(piglit_width/2, 0, piglit_width/2,
 140                                              piglit_height, blue);
 141
 142         piglit_present_results();
 143
 144         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 145 }
 146
 147 void
 148 piglit_init(int argc, char **argv)
 149 {
 150         GLint num;
 151         int i;
 152
 153         for (i = 1; i < argc; i++) {
 154                 if (strcmp(argv[i], "clear") == 0) {
 155                         puts("Testing glClear.");
 156                         test_clear = GL_TRUE;
 157                 }
 158         }
 159
 160         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 161
 162         piglit_require_extension("GL_EXT_framebuffer_object");
 163         piglit_require_extension("GL_ARB_draw_buffers");
 164         piglit_require_extension("GL_EXT_draw_buffers2");
 165         piglit_require_extension("GL_ARB_texture_non_power_of_two");
 166
 167         glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &num);
 168         if (num < 2)
 169                 piglit_report_result(PIGLIT_SKIP);
 170 }