tests/spec/gles-2.0/draw-buffers.c

   1 /*
   2  * Copyright © 2015 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  *    Tapani Pälli <tapani.palli@intel.com>
  25  */
  26
  27 /** @file draw-buffers.c
  28  *
  29  * Tests GL_EXT_draw_buffers implementation
  30  *
  31  * Test iterates over valid and invalid arguments and checks that the
  32  * implementation returns correct error codes.
  33  *
  34  * GL_EXT_draw_buffers specification "Errors" section states:
  35  *
  36  *  "The INVALID_OPERATION error is generated if DrawBuffersEXT is called
  37  *   when the default framebuffer is bound and any of the following conditions
  38  *   hold:
  39  *    - <n> is zero,
  40  *    - <n> is greater than 1 and less than MAX_DRAW_BUFFERS_EXT,
  41  *    - <bufs> contains a value other than BACK or NONE.
  42  *
  43  *   The INVALID_OPERATION error is generated if DrawBuffersEXT is called
  44  *   when bound to a draw framebuffer object and any of the following
  45  *   conditions hold:
  46  *   - the <i>th value in <bufs> is not COLOR_ATTACHMENT<i>_EXT or NONE.
  47  *
  48  *   The INVALID_VALUE error is generated if DrawBuffersEXT is called
  49  *   with a value of <n> which is greater than MAX_DRAW_BUFFERS_EXT.
  50  *
  51  *   The INVALID_ENUM error is generated by FramebufferRenderbuffer if
  52  *   the <attachment> parameter is not one of the values listed in Table 4.x.
  53  *
  54  *   The INVALID_ENUM error is generated by FramebufferTexture2D if
  55  *   the <attachment> parameter is not one of the values listed in Table 4.x.
  56  *
  57  *   The INVALID_ENUM error is generated by GetFramebufferAttachmentParameteriv
  58  *   if the <attachment> parameter is not one of the values listed in Table 4.x."
  59  */
  60
  61 #include "piglit-util-gl.h"
  62
  63 PIGLIT_GL_TEST_CONFIG_BEGIN
  64
  65         config.supports_gl_es_version = 20;
  66
  67 PIGLIT_GL_TEST_CONFIG_END
  68
  69 #define TEXTURE_AMOUNT 3
  70
  71 static const GLenum valid_buffer_list[] = {
  72         GL_COLOR_ATTACHMENT0,
  73         GL_COLOR_ATTACHMENT1,
  74         GL_COLOR_ATTACHMENT2,
  75 };
  76
  77 static const GLenum invalid_buffer_list[] = {
  78         GL_COLOR_ATTACHMENT0,
  79         GL_BACK,
  80         GL_COLOR_ATTACHMENT1,
  81 };
  82
  83 static GLuint
  84 create_fbo(int max_draw_buffers)
  85 {
  86         GLuint fbo;
  87         GLuint depth;
  88         int test_attachments = MIN2(max_draw_buffers, TEXTURE_AMOUNT);
  89         GLuint textures[TEXTURE_AMOUNT];
  90         GLint param;
  91         unsigned i;
  92
  93         /* Generate fbo with test_attachments color attachments. */
  94         glGenFramebuffers(1, &fbo);
  95         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
  96         glGenTextures(test_attachments, textures);
  97
  98         for (i = 0; i < test_attachments; i++) {
  99                 glBindTexture(GL_TEXTURE_2D, textures[i]);
 100                 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 4, 4, 0, GL_RGBA,
 101                         GL_UNSIGNED_BYTE, NULL);
 102
 103                 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
 104                         GL_COLOR_ATTACHMENT0_EXT + i,
 105                         GL_TEXTURE_2D,
 106                         textures[i], 0);
 107
 108         }
 109
 110         /* Test adding invalid attachment. */
 111         glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
 112                 GL_FALSE,
 113                 GL_TEXTURE_2D,
 114                 textures[0], 0);
 115
 116         if (!piglit_check_gl_error(GL_INVALID_ENUM))
 117                 return 0;
 118
 119         /* Create a depth buffer. */
 120         glGenRenderbuffersEXT(1, &depth);
 121         glBindRenderbuffer(GL_RENDERBUFFER_EXT, depth);
 122         glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT16, 4, 4);
 123
 124         /* Test adding invalid renderbuffer. */
 125         glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
 126                 GL_FALSE,
 127                 GL_RENDERBUFFER_EXT,
 128                 depth);
 129
 130         if (!piglit_check_gl_error(GL_INVALID_ENUM))
 131                 return 0;
 132
 133         glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
 134                 GL_DEPTH_ATTACHMENT_EXT,
 135                 GL_RENDERBUFFER_EXT,
 136                 depth);
 137
 138         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
 139                 GL_FRAMEBUFFER_COMPLETE) {
 140                 return 0;
 141         }
 142
 143         /* Test invalid attachment with GetFramebufferAttachmentParameteriv. */
 144         glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_FALSE,
 145                 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &param);
 146
 147         if (!piglit_check_gl_error(GL_INVALID_ENUM))
 148                 return 0;
 149
 150         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
 151
 152         return fbo;
 153 }
 154
 155 static GLboolean
 156 run_test(void)
 157 {
 158         const GLenum back = GL_BACK;
 159         const GLenum att0 = GL_COLOR_ATTACHMENT0;
 160         GLuint fbo;
 161         GLint max_buffers;
 162
 163         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
 164
 165         glGetIntegerv(GL_MAX_DRAW_BUFFERS_EXT, &max_buffers);
 166         if (!piglit_check_gl_error(GL_NO_ERROR))
 167                 return false;
 168
 169         /* Error cases when default framebuffer is bound. */
 170         glDrawBuffersEXT(0, &back);
 171         if (!piglit_check_gl_error(GL_INVALID_OPERATION))
 172                 return false;
 173
 174         if (max_buffers >= 2) {
 175                 glDrawBuffersEXT(2, &back);
 176                 if (!piglit_check_gl_error(GL_INVALID_OPERATION))
 177                         return false;
 178         }
 179
 180         if (max_buffers >= 3) {
 181                 glDrawBuffersEXT(3, &att0);
 182                 if (!piglit_check_gl_error(GL_INVALID_OPERATION))
 183                         return false;
 184         }
 185
 186         /* Positive case with default framebuffer. */
 187         glDrawBuffersEXT(1, &back);
 188         if (!piglit_check_gl_error(GL_NO_ERROR))
 189                 return false;
 190
 191         /* Create user fbo for rest of the tests. */
 192         fbo = create_fbo(max_buffers);
 193         if (!fbo || !piglit_check_gl_error(GL_NO_ERROR))
 194                 return false;
 195
 196         /* Error cases when user framebuffer is bound. */
 197         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 198
 199         if (max_buffers >= 3) {
 200                 glDrawBuffersEXT(3, invalid_buffer_list);
 201                 if (!piglit_check_gl_error(GL_INVALID_OPERATION))
 202                         return false;
 203         }
 204
 205         glDrawBuffersEXT(max_buffers + 1, valid_buffer_list);
 206         if (!piglit_check_gl_error(GL_INVALID_VALUE))
 207                 return false;
 208
 209         /* Positive case with user framebuffer. */
 210         glDrawBuffersEXT(MIN2(max_buffers, TEXTURE_AMOUNT), valid_buffer_list);
 211         if (!piglit_check_gl_error(GL_NO_ERROR))
 212                 return false;
 213
 214         return true;
 215 }
 216
 217
 218 enum piglit_result
 219 piglit_display(void)
 220 {
 221         GLboolean pass = run_test();
 222
 223         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 224 }
 225
 226 void
 227 piglit_init(int argc, char **argv)
 228 {
 229         piglit_require_extension("GL_EXT_draw_buffers");
 230 }