tests/shaders/glsl-vs-statechange-1.c

   1 /*
   2  * Copyright © 2011 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 glsl-vs-statechange-1.c
  29  *
  30  * Tests for a bug that appeared to exist in Mesa 7.11 where the
  31  * constant attribute color from the previous fixed function setup
  32  * would be used, but was hidden by multiple state updates occurring
  33  * per draw call.
  34  */
  35
  36 #include "piglit-util-gl.h"
  37
  38 PIGLIT_GL_TEST_CONFIG_BEGIN
  39
  40         config.supports_gl_compat_version = 10;
  41
  42         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  43
  44 PIGLIT_GL_TEST_CONFIG_END
  45
  46 const char *vs_source =
  47         "void main()\n"
  48         "{\n"
  49         "       gl_Position = gl_Vertex;\n"
  50         "       gl_FrontColor = vec4(0.0, 0.0, 1.0, 0.0);\n"
  51         "}\n";
  52
  53 static GLint prog;
  54
  55 enum piglit_result
  56 piglit_display(void)
  57 {
  58         bool pass = true;
  59         float green[4] = {0, 1, 0, 0};
  60         float blue[4] =  {0, 0, 1, 0};
  61
  62         glColor4fv(green);
  63         piglit_draw_rect(-1, -1, 1, 2);
  64
  65         glUseProgram(prog);
  66         piglit_draw_rect(0, -1, 1, 2);
  67
  68         glUseProgram(0);
  69
  70         pass &= piglit_probe_rect_rgba(0, 0,
  71                                        piglit_width / 2, piglit_height, green);
  72         pass &= piglit_probe_rect_rgba(piglit_width / 2, 0,
  73                                        piglit_width / 2, piglit_height, blue);
  74
  75         piglit_present_results();
  76
  77         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  78 }
  79
  80 void
  81 piglit_init(int argc, char **argv)
  82 {
  83         GLint vs;
  84
  85         piglit_require_gl_version(20);
  86
  87         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
  88
  89         prog = piglit_link_simple_program(vs, 0);
  90
  91         glDeleteShader(vs);
  92 }