tests/spec/arb_bindless_texture/limit.c

   1 /*
   2  * Copyright (C) 2017 Valve 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  *  Marek Olšák <maraeo@gmail.com>
  25  *  Samuel Pitoiset <samuel.pitoiset@gmail.com>
  26  */
  27
  28 /**
  29  * Test that samplers accessed using texture handles are not counted against
  30  * the texture limits.
  31  * Derived from Marek's max-samplers test.
  32  */
  33
  34 #include "common.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 33;
  39         config.supports_gl_core_version = 33;
  40
  41         config.window_width = 300;
  42         config.window_height = 300;
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  44         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 static const char *vs_source =
  49         "#version 330\n"
  50         "#extension GL_ARB_bindless_texture: require\n"
  51         "\n"
  52         "#define NUM %i \n"
  53         "layout (bindless_sampler) uniform;\n"
  54         "\n"
  55         "uniform sampler2D vertex_tex[NUM]; \n"
  56         "uniform int vertex_index;"
  57         "in vec4 piglit_vertex;\n"
  58         "out vec3 vertex_tex_color; \n"
  59         "\n"
  60         "void main() \n"
  61         "{ \n"
  62         "       int i; \n"
  63         "       gl_Position = piglit_vertex;\n"
  64         "       vertex_tex_color = vec3(0.0); \n"
  65         "       for (i = 0; i < NUM; i++) \n"
  66         "               if (i == vertex_index) \n"
  67         "                       vertex_tex_color = textureLod(vertex_tex[i], vec2(%f), 0.0).xyz; \n"
  68         "} \n";
  69
  70 static const char *fs_source =
  71         "#version 330\n"
  72         "#extension GL_ARB_bindless_texture: require\n"
  73         "\n"
  74         "#define NUM %i \n"
  75         "layout (bindless_sampler) uniform;\n"
  76         "\n"
  77         "uniform sampler2D fragment_tex[NUM]; \n"
  78         "uniform int fragment_index;"
  79         "in vec3 vertex_tex_color; \n"
  80         "void main() \n"
  81         "{ \n"
  82         "       int i; \n"
  83         "       vec3 fragment_tex_color = vec3(0.0); \n"
  84         "       for (i = 0; i < NUM; i++) \n"
  85         "               if (i == fragment_index) \n"
  86         "                       fragment_tex_color = texture2D(fragment_tex[i], vec2(%f), 0.0).xyz; \n"
  87         "       gl_FragColor = vec4(fragment_tex_color + vertex_tex_color, 1.0); \n"
  88         "} \n";
  89
  90 GLuint prog;
  91 static int max_vs_textures, max_fs_textures;
  92
  93 static void
  94 get_texture_color(int unit, float out[4])
  95 {
  96         out[0] = (unit % 16) / 15.0;
  97         out[1] = (unit / 16) / 15.0;
  98         out[2] = 0;
  99         out[3] = 1;
 100 }
 101
 102 static void
 103 set_uniform(GLuint prog, const char *name, int value)
 104 {
 105         GLuint loc = glGetUniformLocation(prog, name);
 106         if (loc != -1)
 107                 glUniform1i(loc, value);
 108 }
 109
 110 static GLvoid
 111 draw_rect_core(int ix, int iy, int iw, int ih)
 112 {
 113         float x = -1 + 2.0*ix/piglit_width;
 114         float y = -1 + 2.0*iy/piglit_height;
 115         float w = 2.0*iw/piglit_width;
 116         float h = 2.0*ih/piglit_height;
 117         float verts[4][4];
 118         GLuint vbo;
 119
 120         verts[0][0] = x;
 121         verts[0][1] = y;
 122         verts[0][2] = 0.0;
 123         verts[0][3] = 1.0;
 124         verts[1][0] = x + w;
 125         verts[1][1] = y;
 126         verts[1][2] = 0.0;
 127         verts[1][3] = 1.0;
 128         verts[2][0] = x + w;
 129         verts[2][1] = y + h;
 130         verts[2][2] = 0.0;
 131         verts[2][3] = 1.0;
 132         verts[3][0] = x;
 133         verts[3][1] = y + h;
 134         verts[3][2] = 0.0;
 135         verts[3][3] = 1.0;
 136
 137         glGenBuffers(1, &vbo);
 138         glBindBuffer(GL_ARRAY_BUFFER, vbo);
 139         glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
 140
 141         glEnableVertexAttribArray(0);
 142         glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, NULL);
 143
 144         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 145
 146         glDisableVertexAttribArray(0);
 147         glDeleteBuffers(1, &vbo);
 148 }
 149
 150 static GLboolean
 151 probe_pixel(int num, int x, int y)
 152 {
 153         float expected[4];
 154
 155         get_texture_color(num, expected);
 156
 157         if (piglit_probe_pixel_rgb(x, y, expected))
 158                 return GL_TRUE;
 159
 160         printf("  When testing texture num %i\n", num);
 161         return GL_FALSE;
 162 }
 163
 164 enum piglit_result
 165 piglit_display(void)
 166 {
 167         GLboolean pass = GL_TRUE;
 168         int i, num, x, y;
 169
 170         glClear(GL_COLOR_BUFFER_BIT);
 171
 172         x = 0;
 173         y = 0;
 174         num = 0;
 175
 176         set_uniform(prog, "fragment_index", max_fs_textures);
 177         for (i = 0; i < max_vs_textures; i++) {
 178                 set_uniform(prog, "vertex_index", i);
 179                 draw_rect_core(x, y, 20, 20);
 180                 pass = probe_pixel(num, x+10, y+10) && pass;
 181
 182                 num++;
 183                 x += 20;
 184                 if (x+20 > piglit_width) {
 185                         x = 0;
 186                         y += 20;
 187                 }
 188         }
 189
 190         set_uniform(prog, "vertex_index", max_vs_textures);
 191         for (i = 0; i < max_fs_textures; i++) {
 192                 set_uniform(prog, "fragment_index", i);
 193                 draw_rect_core(x, y, 20, 20);
 194                 pass = probe_pixel(num, x+10, y+10) && pass;
 195
 196                 num++;
 197                 x += 20;
 198                 if (x+20 > piglit_width) {
 199                         x = 0;
 200                         y += 20;
 201                 }
 202         }
 203
 204         piglit_check_gl_error(GL_NO_ERROR);
 205         piglit_present_results();
 206
 207         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 208 }
 209
 210 static void
 211 set_texture_handle(GLuint prog, const char *name, GLuint64 handle)
 212 {
 213         GLint loc;
 214
 215         loc = glGetUniformLocation(prog, name);
 216         if (loc != -1)
 217                 glUniformHandleui64vARB(loc, 1, &handle);
 218 }
 219
 220 static GLuint64
 221 new_bindless_texture(int idx)
 222 {
 223         GLuint64 handle;
 224         float color[4];
 225         GLuint tex;
 226
 227         get_texture_color(idx, color);
 228
 229         glGenTextures(1, &tex);
 230         glBindTexture(GL_TEXTURE_2D, tex);
 231         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1, 1, 0,
 232                      GL_RGBA, GL_FLOAT, color);
 233         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 234         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 235         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
 236         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
 237         glBindTexture(GL_TEXTURE_2D, 0);
 238
 239         handle = glGetTextureHandleARB(tex);
 240         glMakeTextureHandleResidentARB(handle);
 241
 242         return handle;
 243 }
 244
 245 void
 246 piglit_init(int argc, char **argv)
 247 {
 248         GLuint vs, fs, vao;
 249         int max_combined_textures, i, num;
 250         char str[2048];
 251         float texcoord = 0.5;
 252         GLuint64 handle;
 253
 254         piglit_require_extension("GL_ARB_bindless_texture");
 255
 256         /* get limits */
 257         glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_fs_textures);
 258         glGetIntegerv(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &max_vs_textures);
 259         glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_textures);
 260         printf("GL_MAX_TEXTURE_IMAGE_UNITS = %d\n", max_fs_textures);
 261         printf("GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS = %d\n", max_vs_textures);
 262         printf("GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS = %d\n", max_combined_textures);
 263
 264         assert(max_fs_textures <= max_combined_textures);
 265
 266         /* use max_combined_textures + max_vs_textures */
 267         max_vs_textures = MIN2(max_vs_textures, max_combined_textures - max_fs_textures);
 268         max_fs_textures = max_combined_textures;
 269
 270         /* compile shaders */
 271         sprintf(str, vs_source, max_vs_textures, texcoord);
 272         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, str);
 273         sprintf(str, fs_source, max_fs_textures, texcoord);
 274         fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, str);
 275
 276         prog = piglit_link_simple_program(vs, fs);
 277         glUseProgram(prog);
 278
 279         /* initialize resident textures */
 280         num = 0;
 281         for (i = 0; i < max_vs_textures; i++) {
 282                 char name[64];
 283                 sprintf(name, "vertex_tex[%i]", i);
 284                 handle = new_bindless_texture(num);
 285                 set_texture_handle(prog, name, handle);
 286                 num++;
 287         }
 288
 289         for (i = 0; i < max_fs_textures; i++) {
 290                 char name[64];
 291                 sprintf(name, "fragment_tex[%i]", i);
 292                 handle = new_bindless_texture(num);
 293                 set_texture_handle(prog, name, handle);
 294                 num++;
 295         }
 296
 297         piglit_check_gl_error(GL_NO_ERROR);
 298
 299         glClearColor(0.0, 0.0, 1.0, 1.0);
 300
 301         glGenVertexArrays(1, &vao);
 302         glBindVertexArray(vao);
 303
 304         piglit_check_gl_error(GL_NO_ERROR);
 305 }