tests/shaders/sso-user-varying-01.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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file sso-user-varying-01.c
  26  * Test separate shader objects with user-defined varyings.
  27  *
  28  * \author Ian Romanick <ian.d.romanick@intel.com>
  29  */
  30 #include "piglit-util-gl.h"
  31
  32 PIGLIT_GL_TEST_CONFIG_BEGIN
  33
  34         config.supports_gl_compat_version = 10;
  35
  36         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  37
  38 PIGLIT_GL_TEST_CONFIG_END
  39
  40 static const char vs_text[] =
  41         "varying vec4 color;\n"
  42         "\n"
  43         "void main()\n"
  44         "{\n"
  45         "  gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
  46         "  color = vec4(0.0, 1.0, 0.0, 1.0);\n"
  47         "}\n"
  48         ;
  49
  50 static const char fs_text[] =
  51         "varying vec4 color;\n"
  52         "\n"
  53         "void main()\n"
  54         "{\n"
  55         "  gl_FragColor = color;\n"
  56         "}\n"
  57         ;
  58
  59 GLuint prog[2];
  60
  61 enum piglit_result
  62 piglit_display(void)
  63 {
  64         enum piglit_result result = PIGLIT_PASS;
  65         float junk[4];
  66
  67         glClear(GL_COLOR_BUFFER_BIT);
  68
  69         glUseShaderProgramEXT(GL_VERTEX_SHADER, prog[0]);
  70         glUseShaderProgramEXT(GL_FRAGMENT_SHADER, prog[1]);
  71         piglit_draw_rect(10, 10, 10, 10);
  72
  73         /* The result is undefined (and in particular we may find
  74          * green since so many other tests happen to load our
  75          * registers with green), but the GPU shouldn't hang.
  76          * So we read the value, but don't test it for anything.
  77          */
  78         glReadPixels(15, 15, 1, 1, GL_RGBA, GL_FLOAT, junk);
  79
  80         if (!piglit_automatic)
  81                 piglit_present_results();
  82
  83         return result;
  84 }
  85
  86 void
  87 piglit_init(int argc, char **argv)
  88 {
  89         GLboolean try_to_render;
  90         GLuint vs;
  91         GLuint fs;
  92
  93         piglit_require_gl_version(20);
  94
  95         piglit_require_extension("GL_EXT_separate_shader_objects");
  96
  97         glClearColor(0.3, 0.3, 0.3, 0.0);
  98         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  99
 100         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
 101         fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_text);
 102
 103         prog[0] = piglit_link_simple_program(vs, 0);
 104         prog[1] = piglit_link_simple_program(0,  fs);
 105
 106         glDeleteShader(vs);
 107         glDeleteShader(fs);
 108
 109         /* Don't try to render if either program failed to link, and linking
 110          * had better succeed!
 111          */
 112         try_to_render = piglit_link_check_status(prog[0]);
 113         try_to_render = piglit_link_check_status(prog[1])
 114                 && try_to_render;
 115
 116         if (!try_to_render)
 117                 piglit_report_result(PIGLIT_FAIL);
 118 }