tests/spec/gl-2.0/edgeflag.c

   1 /* Copyright © 2012 Intel Corporation
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a
   4  * copy of this software and associated documentation files (the "Software"),
   5  * to deal in the Software without restriction, including without limitation
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   7  * and/or sell copies of the Software, and to permit persons to whom the
   8  * Software is furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice (including the next
  11  * paragraph) shall be included in all copies or substantial portions of the
  12  * Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  20  * IN THE SOFTWARE.
  21  */
  22
  23 /** @file edgeflag.c
  24  *
  25  * Test for glEdgeFlagPointerv() API working with a GLSL program enabled.
  26  *
  27  * The i965 driver had a bug where edge flags didn't work under GLSL.
  28  * We also use both gl_Vertex and a user attribute so that edge flags
  29  * sit in the middle of the list of vertex attributes and results
  30  * in Mesa.
  31  */
  32
  33 #include "piglit-util-gl.h"
  34 #include "minmax-test.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  41         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  42
  43 PIGLIT_GL_TEST_CONFIG_END
  44
  45 static GLuint color_index;
  46
  47 enum piglit_result
  48 piglit_display(void)
  49 {
  50         bool pass = true;
  51         float green[] = {0, 1, 0, 0};
  52         float clear[] = {0.5, 0.5, 0.5, 0.5};
  53         struct {
  54                 GLfloat x, y;
  55                 GLfloat r, g, b, a;
  56                 GLboolean edgeflag;
  57         } verts[] = {
  58                 { 1.5, 1.5, 0.0, 1.0, 0.0, 0.0, GL_TRUE },
  59                 { 5.5, 1.5, 0.0, 1.0, 0.0, 0.0, GL_FALSE },
  60                 { 5.5, 5.5, 0.0, 1.0, 0.0, 0.0, GL_TRUE },
  61                 { 1.5, 5.5, 0.0, 1.0, 0.0, 0.0, GL_FALSE },
  62         };
  63
  64         piglit_ortho_projection(piglit_width, piglit_height, false);
  65
  66         glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
  67
  68         glClearColor(0.5, 0.5, 0.5, 0.5);
  69         glClear(GL_COLOR_BUFFER_BIT);
  70
  71         glColor4f(0, 1, 0, 0);
  72
  73         glVertexPointer(2, GL_FLOAT, sizeof(verts[0]), &verts[0].x);
  74         glVertexAttribPointer(color_index, 4, GL_FLOAT, GL_FALSE,
  75                               sizeof(verts[0]), &verts[0].r);
  76         glEdgeFlagPointer(sizeof(verts[0]), &verts[0].edgeflag);
  77         glEnableClientState(GL_VERTEX_ARRAY);
  78         glEnableVertexAttribArray(color_index);
  79         glEnableClientState(GL_EDGE_FLAG_ARRAY);
  80
  81         glDrawArrays(GL_POLYGON, 0, 4);
  82
  83         pass = piglit_probe_pixel_rgba(3, 1, green) && pass;
  84         pass = piglit_probe_pixel_rgba(3, 5, green) && pass;
  85         pass = piglit_probe_pixel_rgba(1, 3, clear) && pass;
  86         pass = piglit_probe_pixel_rgba(5, 3, clear) && pass;
  87
  88         piglit_present_results();
  89
  90         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  91 }
  92
  93 const char *vs_source =
  94         "attribute vec4 in_color;\n"
  95         "varying vec4 color;\n"
  96         "\n"
  97         "void main()\n"
  98         "{\n"
  99         "       gl_Position = ftransform();\n"
 100         "       color = in_color;\n"
 101         "}\n";
 102
 103 const char *fs_source =
 104         "varying vec4 color;\n"
 105         "\n"
 106         "void main()\n"
 107         "{\n"
 108         "       gl_FragColor = color;\n"
 109         "}\n";
 110
 111 void
 112 piglit_init(int argc, char **argv)
 113 {
 114         GLuint prog;
 115
 116         prog = piglit_build_simple_program(vs_source, fs_source);
 117         glUseProgram(prog);
 118         color_index = glGetAttribLocation(prog, "in_color");
 119 }