| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (gl_capabilities.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <stdint.h> |
| 25 | #include <math.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | #include <boolean.h> |
| 29 | |
| 30 | #include <glsym/glsym.h> |
| 31 | |
| 32 | #include <gfx/gl_capabilities.h> |
| 33 | |
| 34 | static bool gl_core_context = false; |
| 35 | |
| 36 | bool gl_query_core_context_in_use(void) |
| 37 | { |
| 38 | return gl_core_context; |
| 39 | } |
| 40 | |
| 41 | void gl_query_core_context_set(bool set) |
| 42 | { |
| 43 | gl_core_context = set; |
| 44 | } |
| 45 | |
| 46 | void gl_query_core_context_unset(void) |
| 47 | { |
| 48 | gl_core_context = false; |
| 49 | } |
| 50 | |
| 51 | bool gl_query_extension(const char *ext) |
| 52 | { |
| 53 | bool ret = false; |
| 54 | |
| 55 | if (gl_query_core_context_in_use()) |
| 56 | { |
| 57 | #ifdef GL_NUM_EXTENSIONS |
| 58 | GLint i; |
| 59 | GLint exts = 0; |
| 60 | glGetIntegerv(GL_NUM_EXTENSIONS, &exts); |
| 61 | for (i = 0; i < exts; i++) |
| 62 | { |
| 63 | const char *str = (const char*)glGetStringi(GL_EXTENSIONS, i); |
| 64 | if (str && strstr(str, ext)) |
| 65 | { |
| 66 | ret = true; |
| 67 | break; |
| 68 | } |
| 69 | } |
| 70 | #endif |
| 71 | } |
| 72 | else |
| 73 | { |
| 74 | const char *str = (const char*)glGetString(GL_EXTENSIONS); |
| 75 | ret = str && strstr(str, ext); |
| 76 | } |
| 77 | |
| 78 | return ret; |
| 79 | } |
| 80 | |
| 81 | bool gl_check_error(char **error_string) |
| 82 | { |
| 83 | int error = glGetError(); |
| 84 | switch (error) |
| 85 | { |
| 86 | case GL_INVALID_ENUM: |
| 87 | *error_string = strdup("GL: Invalid enum."); |
| 88 | break; |
| 89 | case GL_INVALID_VALUE: |
| 90 | *error_string = strdup("GL: Invalid value."); |
| 91 | break; |
| 92 | case GL_INVALID_OPERATION: |
| 93 | *error_string = strdup("GL: Invalid operation."); |
| 94 | break; |
| 95 | case GL_OUT_OF_MEMORY: |
| 96 | *error_string = strdup("GL: Out of memory."); |
| 97 | break; |
| 98 | case GL_NO_ERROR: |
| 99 | return true; |
| 100 | default: |
| 101 | *error_string = strdup("Non specified GL error."); |
| 102 | break; |
| 103 | } |
| 104 | |
| 105 | return false; |
| 106 | } |
| 107 | |
| 108 | bool gl_check_capability(enum gl_capability_enum enum_idx) |
| 109 | { |
| 110 | unsigned major = 0; |
| 111 | unsigned minor = 0; |
| 112 | const char *vendor = (const char*)glGetString(GL_VENDOR); |
| 113 | const char *renderer = (const char*)glGetString(GL_RENDERER); |
| 114 | const char *version = (const char*)glGetString(GL_VERSION); |
| 115 | #ifdef HAVE_OPENGLES |
| 116 | if (version && sscanf(version, "OpenGL ES %u.%u", &major, &minor) != 2) |
| 117 | #else |
| 118 | if (version && sscanf(version, "%u.%u", &major, &minor) != 2) |
| 119 | #endif |
| 120 | major = minor = 0; |
| 121 | |
| 122 | (void)vendor; |
| 123 | (void)renderer; |
| 124 | |
| 125 | switch (enum_idx) |
| 126 | { |
| 127 | case GL_CAPS_GLES3_SUPPORTED: |
| 128 | #if defined(HAVE_OPENGLES) |
| 129 | if (major >= 3) |
| 130 | return true; |
| 131 | #endif |
| 132 | break; |
| 133 | case GL_CAPS_EGLIMAGE: |
| 134 | #if defined(HAVE_EGL) && defined(HAVE_OPENGLES) |
| 135 | if (glEGLImageTargetTexture2DOES != NULL) |
| 136 | return true; |
| 137 | #endif |
| 138 | break; |
| 139 | case GL_CAPS_SYNC: |
| 140 | #ifdef HAVE_OPENGLES |
| 141 | if (major >= 3) |
| 142 | return true; |
| 143 | #else |
| 144 | if (gl_query_extension("ARB_sync") && |
| 145 | glFenceSync && glDeleteSync && glClientWaitSync) |
| 146 | return true; |
| 147 | #endif |
| 148 | break; |
| 149 | case GL_CAPS_MIPMAP: |
| 150 | { |
| 151 | static bool extension_queried = false; |
| 152 | static bool extension = false; |
| 153 | |
| 154 | if (!extension_queried) |
| 155 | { |
| 156 | extension = gl_query_extension("ARB_framebuffer_object"); |
| 157 | extension_queried = true; |
| 158 | } |
| 159 | |
| 160 | if (extension) |
| 161 | return true; |
| 162 | } |
| 163 | break; |
| 164 | case GL_CAPS_VAO: |
| 165 | #ifndef HAVE_OPENGLES |
| 166 | if (!gl_query_core_context_in_use() && !gl_query_extension("ARB_vertex_array_object")) |
| 167 | return false; |
| 168 | |
| 169 | if (glGenVertexArrays && glBindVertexArray && glDeleteVertexArrays) |
| 170 | return true; |
| 171 | #endif |
| 172 | break; |
| 173 | case GL_CAPS_FBO: |
| 174 | #if defined(HAVE_PSGL) || defined(HAVE_OPENGLES2) || defined(HAVE_OPENGLES3) || defined(HAVE_OPENGLES_3_1) || defined(HAVE_OPENGLES_3_2) |
| 175 | return true; |
| 176 | #else |
| 177 | if ( !gl_query_core_context_in_use() |
| 178 | && !gl_query_extension("ARB_framebuffer_object") |
| 179 | && !gl_query_extension("EXT_framebuffer_object")) |
| 180 | return false; |
| 181 | |
| 182 | if (gl_query_extension("ARB_framebuffer_object")) |
| 183 | return true; |
| 184 | |
| 185 | if (gl_query_extension("EXT_framebuffer_object")) |
| 186 | return true; |
| 187 | |
| 188 | if (major >= 3) |
| 189 | return true; |
| 190 | break; |
| 191 | #endif |
| 192 | case GL_CAPS_ARGB8: |
| 193 | #ifdef HAVE_OPENGLES |
| 194 | if (gl_query_extension("OES_rgb8_rgba8") |
| 195 | || gl_query_extension("ARM_rgba8") |
| 196 | || major >= 3) |
| 197 | return true; |
| 198 | #else |
| 199 | /* TODO/FIXME - implement this for non-GLES? */ |
| 200 | #endif |
| 201 | break; |
| 202 | case GL_CAPS_DEBUG: |
| 203 | if (gl_query_extension("KHR_debug")) |
| 204 | return true; |
| 205 | #ifndef HAVE_OPENGLES |
| 206 | if (gl_query_extension("ARB_debug_output")) |
| 207 | return true; |
| 208 | #endif |
| 209 | break; |
| 210 | case GL_CAPS_PACKED_DEPTH_STENCIL: |
| 211 | if (major >= 3) |
| 212 | return true; |
| 213 | if (gl_query_extension("OES_packed_depth_stencil")) |
| 214 | return true; |
| 215 | if (gl_query_extension("EXT_packed_depth_stencil")) |
| 216 | return true; |
| 217 | break; |
| 218 | case GL_CAPS_ES2_COMPAT: |
| 219 | #ifndef HAVE_OPENGLES |
| 220 | /* ATI card detected, skipping check for GL_RGB565 support... */ |
| 221 | if (vendor && renderer && (strstr(vendor, "ATI") || strstr(renderer, "ATI"))) |
| 222 | return false; |
| 223 | |
| 224 | if (gl_query_extension("ARB_ES2_compatibility")) |
| 225 | return true; |
| 226 | #endif |
| 227 | break; |
| 228 | case GL_CAPS_UNPACK_ROW_LENGTH: |
| 229 | #ifdef HAVE_OPENGLES |
| 230 | if (major >= 3) |
| 231 | return true; |
| 232 | |
| 233 | /* Extension GL_EXT_unpack_subimage, can copy textures faster |
| 234 | * than using UNPACK_ROW_LENGTH */ |
| 235 | if (gl_query_extension("GL_EXT_unpack_subimage")) |
| 236 | return true; |
| 237 | #endif |
| 238 | break; |
| 239 | case GL_CAPS_FULL_NPOT_SUPPORT: |
| 240 | if (major >= 3) |
| 241 | return true; |
| 242 | #ifdef HAVE_OPENGLES |
| 243 | if (gl_query_extension("ARB_texture_non_power_of_two") || |
| 244 | gl_query_extension("OES_texture_npot")) |
| 245 | return true; |
| 246 | #else |
| 247 | { |
| 248 | GLint max_texture_size = 0; |
| 249 | GLint max_native_instr = 0; |
| 250 | /* try to detect actual npot support. might fail for older cards. */ |
| 251 | bool arb_npot = gl_query_extension("ARB_texture_non_power_of_two"); |
| 252 | bool arb_frag_program = gl_query_extension("ARB_fragment_program"); |
| 253 | |
| 254 | glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size); |
| 255 | |
| 256 | #ifdef GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB |
| 257 | if (arb_frag_program && glGetProgramivARB) |
| 258 | glGetProgramivARB(GL_FRAGMENT_PROGRAM_ARB, |
| 259 | GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB, &max_native_instr); |
| 260 | #endif |
| 261 | |
| 262 | if (arb_npot && arb_frag_program && |
| 263 | (max_texture_size >= 8192) && (max_native_instr >= 4096)) |
| 264 | return true; |
| 265 | } |
| 266 | #endif |
| 267 | break; |
| 268 | case GL_CAPS_SRGB_FBO_ES3: |
| 269 | #ifdef HAVE_OPENGLES |
| 270 | if (major >= 3) |
| 271 | return true; |
| 272 | #else |
| 273 | break; |
| 274 | #endif |
| 275 | case GL_CAPS_SRGB_FBO: |
| 276 | #if defined(HAVE_OPENGLES) |
| 277 | if (major >= 3 || gl_query_extension("EXT_sRGB")) |
| 278 | return true; |
| 279 | #endif |
| 280 | if (gl_check_capability(GL_CAPS_FBO)) |
| 281 | { |
| 282 | if ( gl_query_core_context_in_use() || |
| 283 | (gl_query_extension("EXT_texture_sRGB") |
| 284 | && gl_query_extension("ARB_framebuffer_sRGB")) |
| 285 | ) |
| 286 | return true; |
| 287 | } |
| 288 | break; |
| 289 | case GL_CAPS_FP_FBO: |
| 290 | /* GLES - No extensions for float FBO currently. */ |
| 291 | #ifndef HAVE_OPENGLES |
| 292 | if (gl_check_capability(GL_CAPS_FBO)) |
| 293 | { |
| 294 | /* Float FBO is core in 3.2. */ |
| 295 | if (gl_query_core_context_in_use() || gl_query_extension("ARB_texture_float")) |
| 296 | return true; |
| 297 | } |
| 298 | #endif |
| 299 | break; |
| 300 | case GL_CAPS_BGRA8888: |
| 301 | #ifdef HAVE_OPENGLES |
| 302 | /* There are both APPLE and EXT variants. */ |
| 303 | if (gl_query_extension("BGRA8888")) |
| 304 | return true; |
| 305 | #else |
| 306 | return true; |
| 307 | #endif |
| 308 | break; |
| 309 | case GL_CAPS_TEX_STORAGE: |
| 310 | #ifdef HAVE_OPENGLES |
| 311 | if (major >= 3) |
| 312 | return true; |
| 313 | #else |
| 314 | if (vendor && strstr(vendor, "ATI Technologies")) |
| 315 | return false; |
| 316 | if (gl_query_extension("ARB_texture_storage")) |
| 317 | return true; |
| 318 | #endif |
| 319 | break; |
| 320 | case GL_CAPS_TEX_STORAGE_EXT: |
| 321 | #ifdef TARGET_OS_IPHONE |
| 322 | /* Not working on iOS */ |
| 323 | return false; |
| 324 | #else |
| 325 | if (gl_query_extension("EXT_texture_storage")) |
| 326 | return true; |
| 327 | #endif |
| 328 | break; |
| 329 | case GL_CAPS_NONE: |
| 330 | default: |
| 331 | break; |
| 332 | } |
| 333 | |
| 334 | return false; |
| 335 | } |