1 /*
2 * Copyright © 2012 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 elements.c
26 *
27 * Tests that glDrawElementsInstancedARB() can render multiple
28 * instances and the instance IDs are propagated to the shader.
29 *
30 * This is a derivative of instance-array-dereference.c, which uses
31 * glDrawArraysInstancedARB().
32 */
33
34 #include "piglit-util-gl.h"
35
36 PIGLIT_GL_TEST_CONFIG_BEGIN
37
38 config.supports_gl_compat_version = 10;
39 config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
40 config.khr_no_error_support = PIGLIT_NO_ERRORS;
41
42 PIGLIT_GL_TEST_CONFIG_END
43
44 static const char *vs_source =
45 "#version 120\n"
46 "#extension GL_ARB_draw_instanced: require\n"
47 "\n"
48 "uniform vec4 instance_colors[] = vec4[](vec4(0.0, 1.0, 0.0, 1.0),\n"
49 " vec4(0.0, 1.0, 1.0, 1.0),\n"
50 " vec4(0.0, 0.0, 1.0, 1.0));\n"
51 "\n"
52 "varying vec4 color;\n"
53 "\n"
54 "void main()\n"
55 "{\n"
56 " color = instance_colors[gl_InstanceIDARB];\n"
57 "\n"
58 " vec4 v = gl_Vertex;\n"
59 " v.x += 20.0 * float(gl_InstanceIDARB);\n"
60 "\n"
61 " gl_Position = gl_ModelViewProjectionMatrix * v;\n"
62 "}\n";
63
64 static const char *fs_source =
65 "varying vec4 color;\n"
66 "void main()\n"
67 "{\n"
68 " gl_FragColor = color;\n"
69 "}\n";
70
71 enum piglit_result
piglit_display(void)72 piglit_display(void)
73 {
74 static const int indices[6] = {0, 1, 2, 0, 2, 3};
75 static const float verts[] = {
76 10, 10,
77 20, 10,
78 20, 20,
79 10, 20,
80 };
81 static const float green[4] = {0.0, 1.0, 0.0, 1.0};
82 static const float cyan[4] = {0.0, 1.0, 1.0, 1.0};
83 static const float blue[4] = {0.0, 0.0, 1.0, 1.0};
84 enum piglit_result result = PIGLIT_PASS;
85
86 piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
87
88 glViewport(0, 0, piglit_width, piglit_height);
89
90 glClearColor(0.5, 0.5, 0.5, 0.0);
91 glClear(GL_COLOR_BUFFER_BIT);
92
93 glVertexPointer(2, GL_FLOAT, 0, verts);
94 glEnableClientState(GL_VERTEX_ARRAY);
95 glDrawElementsInstancedARB(GL_TRIANGLES, 6, GL_UNSIGNED_INT,
96 indices, 3);
97 glDisableClientState(GL_VERTEX_ARRAY);
98
99 if (!piglit_probe_rect_rgba(10, 10, 10, 10, green))
100 result = PIGLIT_FAIL;
101
102 if (!piglit_probe_rect_rgba(30, 10, 10, 10, cyan))
103 result = PIGLIT_FAIL;
104
105 if (!piglit_probe_rect_rgba(50, 10, 10, 10, blue))
106 result = PIGLIT_FAIL;
107
108 piglit_present_results();
109
110 return result;
111 }
112
113 void
piglit_init(int argc,char ** argv)114 piglit_init(int argc, char **argv)
115 {
116 GLuint prog;
117
118 piglit_require_extension("GL_ARB_draw_instanced");
119
120 prog = piglit_build_simple_program(vs_source, fs_source);
121
122 glUseProgram(prog);
123 }
124