tests/spec/arb_clear_texture/3d.c

   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
  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
  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
 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
 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
 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
 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 }