1 /*
2 * Copyright (c) 2014 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 /** @file 3d.c
25 *
26 * A test of using glClearTexSubImage to clear sub-regions of a 3D
27 * texture. A 4x4x4 texture is created with all green data. The region
28 * 1x2x2+1+1+1 is cleared to zeroes by setting the data to NULL and
29 * the region 1x2x2+2+1+1 is cleared to red. All four 4x4 images are
30 * then drawn to the screen in left-to-right order.
31 */
32
33 #define TEX_WIDTH 4
34 #define TEX_HEIGHT 4
35 #define TEX_DEPTH 4
36
37 #include "piglit-util-gl.h"
38
39 PIGLIT_GL_TEST_CONFIG_BEGIN
40
41 config.supports_gl_compat_version = 20;
42
43 config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
44
45 config.khr_no_error_support = PIGLIT_NO_ERRORS;
46
47 PIGLIT_GL_TEST_CONFIG_END
48
49 static const float green[3] = {0.0, 1.0, 0.0};
50 static const float red[3] = {1.0, 0.0, 0.0};
51 static const float black[3] = {0.0, 0.0, 0.0};
52
53 static GLuint
create_texture(void)54 create_texture(void)
55 {
56 GLubyte tex_data[TEX_WIDTH * TEX_HEIGHT * TEX_DEPTH * 3];
57 static const GLubyte green_bytes[3] = { 0x00, 0xff, 0x00 };
58 GLuint tex;
59 int i;
60
61 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
62
63 for (i = 0; i < TEX_WIDTH * TEX_HEIGHT * TEX_DEPTH; i++)
64 memcpy(tex_data + i * 3, green_bytes, sizeof green_bytes);
65
66 glGenTextures(1, &tex);
67 glBindTexture(GL_TEXTURE_3D, tex);
68 glTexImage3D(GL_TEXTURE_3D,
69 0, /* level */
70 GL_RGB,
71 TEX_WIDTH, TEX_HEIGHT, TEX_DEPTH,
72 0, /* border */
73 GL_RGB,
74 GL_UNSIGNED_BYTE,
75 tex_data);
76 glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
77 glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
78
79 if (!piglit_check_gl_error(GL_NO_ERROR))
80 piglit_report_result(PIGLIT_FAIL);
81
82 return tex;
83 }
84
85 static void
clear_texture(GLuint tex)86 clear_texture(GLuint tex)
87 {
88 glClearTexSubImage(tex,
89 0, /* level */
90 1, 1, 1, /* x/y/z */
91 1, 2, 2, /* width/height/depth */
92 GL_RGB,
93 GL_UNSIGNED_BYTE,
94 NULL);
95 glClearTexSubImage(tex,
96 0, /* level */
97 2, 1, 1, /* x/y/z */
98 1, 2, 2, /* width/height/depth */
99 GL_RGB,
100 GL_FLOAT,
101 red);
102
103 if (!piglit_check_gl_error(GL_NO_ERROR))
104 piglit_report_result(PIGLIT_FAIL);
105 }
106
107 static void
init_program(void)108 init_program(void)
109 {
110 GLuint prog;
111 GLuint uniform;
112
113 static const char vs_source[] =
114 "attribute vec2 piglit_vertex;\n"
115 "attribute vec3 piglit_texcoord;\n"
116 "uniform vec2 fb_size;\n"
117 "varying vec3 tex_coord;\n"
118 "\n"
119 "void main()\n"
120 "{\n"
121 " gl_Position = vec4(piglit_vertex * 2.0 /\n"
122 " fb_size - 1.0,\n"
123 " 0.0, 1.0);\n"
124 " tex_coord = piglit_texcoord;\n"
125 "}\n";
126 static const char fs_source[] =
127 "uniform sampler3D tex;\n"
128 "varying vec3 tex_coord;\n"
129 "\n"
130 "void main()\n"
131 "{\n"
132 " gl_FragColor = texture3D(tex, tex_coord);\n"
133 "}\n";
134
135 prog = piglit_build_simple_program(vs_source, fs_source);
136
137 glUseProgram(prog);
138
139 uniform = glGetUniformLocation(prog, "tex");
140 glUniform1i(uniform, 0);
141
142 uniform = glGetUniformLocation(prog, "fb_size");
143 glUniform2f(uniform, piglit_width, piglit_height);
144 }
145
146 void
piglit_init(int argc,char ** argv)147 piglit_init(int argc, char **argv)
148 {
149 /* glClearTexture is either in the GL_ARB_clear_texture
150 * extension or in core in GL 4.4
151 */
152 if (piglit_get_gl_version() < 44 &&
153 !piglit_is_extension_supported("GL_ARB_clear_texture")) {
154 printf("OpenGL 4.4 or GL_ARB_clear_texture is required.\n");
155 piglit_report_result(PIGLIT_SKIP);
156 }
157
158 init_program();
159 }
160
161 static void
draw_rect(float x,float y,float width,float height,float tex_z)162 draw_rect(float x, float y, float width, float height, float tex_z)
163 {
164 struct {
165 float x, y;
166 float tx, ty, tz;
167 } attribs[] = {
168 { x, y, 0.0f, 0.0f, tex_z },
169 { x + width, y, 1.0f, 0.0f, tex_z },
170 { x, y + height, 0.0f, 1.0f, tex_z },
171 { x + width, y + height, 1.0f, 1.0f, tex_z },
172 };
173
174 glEnableVertexAttribArray(PIGLIT_ATTRIB_POS);
175 glVertexAttribPointer(PIGLIT_ATTRIB_POS,
176 2, /* size */
177 GL_FLOAT,
178 GL_FALSE, /* normalized */
179 sizeof attribs[0],
180 &attribs[0].x);
181 glEnableVertexAttribArray(PIGLIT_ATTRIB_TEX);
182 glVertexAttribPointer(PIGLIT_ATTRIB_TEX,
183 3, /* size */
184 GL_FLOAT,
185 GL_FALSE, /* normalized */
186 sizeof attribs[0],
187 &attribs[0].tx);
188
189 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
190
191 glDisableVertexAttribArray(PIGLIT_ATTRIB_POS);
192 glDisableVertexAttribArray(PIGLIT_ATTRIB_TEX);
193 }
194
195 enum piglit_result
piglit_display(void)196 piglit_display(void)
197 {
198 bool pass = true;
199 GLuint tex;
200 int i;
201
202 tex = create_texture();
203
204 clear_texture(tex);
205
206 glBindTexture(GL_TEXTURE_3D, tex);
207
208 /* Render all of the images to the screen */
209 for (i = 0; i < TEX_DEPTH; i++) {
210 draw_rect(i * TEX_WIDTH, 0.0, /* x/y */
211 TEX_WIDTH, TEX_HEIGHT,
212 i / (TEX_DEPTH - 1.0f));
213 }
214
215 glBindTexture(GL_TEXTURE_3D, 0);
216
217 glDeleteTextures(1, &tex);
218
219 /* First image is all green */
220 pass &= piglit_probe_rect_rgb(0, 0, 4, 4, green);
221
222 /* Second image is green with with a short black and red bar
223 * in the middle */
224 pass &= piglit_probe_rect_rgb(4, 0, 1, 4, green);
225 pass &= piglit_probe_pixel_rgb(5, 0, green);
226 pass &= piglit_probe_rect_rgb(5, 1, 1, 2, black);
227 pass &= piglit_probe_pixel_rgb(5, 3, green);
228 pass &= piglit_probe_pixel_rgb(6, 0, green);
229 pass &= piglit_probe_rect_rgb(6, 1, 1, 2, red);
230 pass &= piglit_probe_pixel_rgb(6, 3, green);
231 pass &= piglit_probe_rect_rgb(7, 0, 1, 4, green);
232 /* Third image is the same */
233 pass &= piglit_probe_rect_rgb(8, 0, 1, 4, green);
234 pass &= piglit_probe_pixel_rgb(9, 0, green);
235 pass &= piglit_probe_rect_rgb(9, 1, 1, 2, black);
236 pass &= piglit_probe_pixel_rgb(9, 3, green);
237 pass &= piglit_probe_pixel_rgb(10, 0, green);
238 pass &= piglit_probe_rect_rgb(10, 1, 1, 2, red);
239 pass &= piglit_probe_pixel_rgb(10, 3, green);
240 pass &= piglit_probe_rect_rgb(11, 0, 1, 4, green);
241
242 /* Fourth image is all green */
243 pass &= piglit_probe_rect_rgb(12, 0, 4, 4, green);
244
245 piglit_present_results();
246
247 return pass ? PIGLIT_PASS : PIGLIT_FAIL;
248 }
249