tests/shaders/glsl-light-model.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
  24 /**
  25  * \file glsl-link-initializer-01.c
  26  * Test conflicting variable initializers.
  27  *
  28  * Each of the 3 shaders involved in this test have a global variable called
  29  * \c global_variable.  Two of the shaders have (differing) initializers for
  30  * this variable, and the other lacks an initalizer.  The test verifies that
  31  * linking the 3 shaders together results in an error due to the conflicting
  32  * initializer.
  33  *
  34  * \author Ian Romanick
  35  */
  36
  37 #include "piglit-util-gl.h"
  38
  39 PIGLIT_GL_TEST_CONFIG_BEGIN
  40
  41         config.supports_gl_compat_version = 10;
  42
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47 static const GLfloat verts[12] = {
  48         10.0, 10.0,
  49         20.0, 10.0,
  50         20.0, 20.0,
  51         10.0, 20.0
  52 };
  53
  54 static const char *vs_code =
  55         "void main()\n"
  56         "{\n"
  57         "       gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
  58         "}\n";
  59
  60 static const char *fs_code =
  61         "void main()\n"
  62         "{\n"
  63         "       gl_FragColor = gl_LightModel.ambient;\n"
  64         "}\n";
  65
  66
  67 void
  68 piglit_init(int argc, char **argv)
  69 {
  70         GLuint vs, fs, prog;
  71
  72         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  73
  74         piglit_require_gl_version(20);
  75
  76         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_code);
  77         fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_code);
  78         prog = piglit_link_simple_program(vs, fs);
  79
  80         glUseProgram(prog);
  81
  82         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(GLfloat),
  83                               verts);
  84         glEnableVertexAttribArray(0);
  85 }
  86
  87
  88 enum piglit_result
  89 piglit_display(void)
  90 {
  91         GLboolean pass = GL_TRUE;
  92         static const GLfloat green[4] = { 0.0, 1.0, 0.0, 1.0 };
  93
  94         glClearColor(0.5, 0.5, 0.5, 1.0);
  95         glClear(GL_COLOR_BUFFER_BIT);
  96
  97         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, green);
  98
  99         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 100
 101         pass = pass && piglit_probe_pixel_rgb(15, 15, green);
 102
 103         piglit_present_results();
 104
 105         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 106 }