mirror of
https://github.com/libretro/RetroArch
synced 2024-07-08 20:25:47 +00:00
336 lines
9.7 KiB
C
336 lines
9.7 KiB
C
/* Copyright (C) 2010-2020 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (gl_capabilities.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <math.h>
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#include <string.h>
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#include <boolean.h>
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#include <glsym/glsym.h>
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#include <gfx/gl_capabilities.h>
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static bool gl_core_context = false;
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bool gl_query_core_context_in_use(void)
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{
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return gl_core_context;
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}
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void gl_query_core_context_set(bool set)
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{
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gl_core_context = set;
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}
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void gl_query_core_context_unset(void)
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{
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gl_core_context = false;
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}
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bool gl_query_extension(const char *ext)
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{
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bool ret = false;
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if (gl_query_core_context_in_use())
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{
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#ifdef GL_NUM_EXTENSIONS
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GLint i;
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GLint exts = 0;
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glGetIntegerv(GL_NUM_EXTENSIONS, &exts);
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for (i = 0; i < exts; i++)
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{
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const char *str = (const char*)glGetStringi(GL_EXTENSIONS, i);
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if (str && strstr(str, ext))
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{
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ret = true;
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break;
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}
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}
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#endif
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}
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else
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{
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const char *str = (const char*)glGetString(GL_EXTENSIONS);
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ret = str && strstr(str, ext);
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}
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return ret;
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}
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bool gl_check_error(char **error_string)
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{
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int error = glGetError();
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switch (error)
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{
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case GL_INVALID_ENUM:
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*error_string = strdup("GL: Invalid enum.");
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break;
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case GL_INVALID_VALUE:
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*error_string = strdup("GL: Invalid value.");
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break;
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case GL_INVALID_OPERATION:
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*error_string = strdup("GL: Invalid operation.");
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break;
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case GL_OUT_OF_MEMORY:
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*error_string = strdup("GL: Out of memory.");
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break;
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case GL_NO_ERROR:
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return true;
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default:
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*error_string = strdup("Non specified GL error.");
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break;
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}
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return false;
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}
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bool gl_check_capability(enum gl_capability_enum enum_idx)
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{
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unsigned major = 0;
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unsigned minor = 0;
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const char *vendor = (const char*)glGetString(GL_VENDOR);
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const char *renderer = (const char*)glGetString(GL_RENDERER);
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const char *version = (const char*)glGetString(GL_VERSION);
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#ifdef HAVE_OPENGLES
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if (version && sscanf(version, "OpenGL ES %u.%u", &major, &minor) != 2)
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#else
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if (version && sscanf(version, "%u.%u", &major, &minor) != 2)
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#endif
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major = minor = 0;
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(void)vendor;
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(void)renderer;
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switch (enum_idx)
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{
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case GL_CAPS_GLES3_SUPPORTED:
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#if defined(HAVE_OPENGLES)
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if (major >= 3)
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return true;
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#endif
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break;
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case GL_CAPS_EGLIMAGE:
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#if defined(HAVE_EGL) && defined(HAVE_OPENGLES)
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if (glEGLImageTargetTexture2DOES != NULL)
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return true;
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#endif
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break;
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case GL_CAPS_SYNC:
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#ifdef HAVE_OPENGLES
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if (major >= 3)
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return true;
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#else
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if (gl_query_extension("ARB_sync") &&
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glFenceSync && glDeleteSync && glClientWaitSync)
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return true;
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#endif
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break;
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case GL_CAPS_MIPMAP:
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{
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static bool extension_queried = false;
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static bool extension = false;
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if (!extension_queried)
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{
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extension = gl_query_extension("ARB_framebuffer_object");
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extension_queried = true;
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}
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if (extension)
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return true;
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}
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break;
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case GL_CAPS_VAO:
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#ifndef HAVE_OPENGLES
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if (!gl_query_core_context_in_use() && !gl_query_extension("ARB_vertex_array_object"))
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return false;
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if (glGenVertexArrays && glBindVertexArray && glDeleteVertexArrays)
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return true;
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#endif
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break;
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case GL_CAPS_FBO:
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#if defined(HAVE_PSGL) || defined(HAVE_OPENGLES2) || defined(HAVE_OPENGLES3) || defined(HAVE_OPENGLES_3_1) || defined(HAVE_OPENGLES_3_2)
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return true;
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#else
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if ( !gl_query_core_context_in_use()
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&& !gl_query_extension("ARB_framebuffer_object")
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&& !gl_query_extension("EXT_framebuffer_object"))
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return false;
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if (gl_query_extension("ARB_framebuffer_object"))
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return true;
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if (gl_query_extension("EXT_framebuffer_object"))
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return true;
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if (major >= 3)
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return true;
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break;
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#endif
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case GL_CAPS_ARGB8:
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#ifdef HAVE_OPENGLES
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if (gl_query_extension("OES_rgb8_rgba8")
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|| gl_query_extension("ARM_rgba8")
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|| major >= 3)
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return true;
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#else
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/* TODO/FIXME - implement this for non-GLES? */
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#endif
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break;
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case GL_CAPS_DEBUG:
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if (gl_query_extension("KHR_debug"))
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return true;
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#ifndef HAVE_OPENGLES
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if (gl_query_extension("ARB_debug_output"))
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return true;
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#endif
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break;
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case GL_CAPS_PACKED_DEPTH_STENCIL:
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if (major >= 3)
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return true;
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if (gl_query_extension("OES_packed_depth_stencil"))
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return true;
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if (gl_query_extension("EXT_packed_depth_stencil"))
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return true;
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break;
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case GL_CAPS_ES2_COMPAT:
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#ifndef HAVE_OPENGLES
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/* ATI card detected, skipping check for GL_RGB565 support... */
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if (vendor && renderer && (strstr(vendor, "ATI") || strstr(renderer, "ATI")))
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return false;
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if (gl_query_extension("ARB_ES2_compatibility"))
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return true;
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#endif
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break;
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case GL_CAPS_UNPACK_ROW_LENGTH:
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#ifdef HAVE_OPENGLES
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if (major >= 3)
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return true;
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/* Extension GL_EXT_unpack_subimage, can copy textures faster
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* than using UNPACK_ROW_LENGTH */
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if (gl_query_extension("GL_EXT_unpack_subimage"))
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return true;
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#endif
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break;
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case GL_CAPS_FULL_NPOT_SUPPORT:
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if (major >= 3)
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return true;
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#ifdef HAVE_OPENGLES
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if (gl_query_extension("ARB_texture_non_power_of_two") ||
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gl_query_extension("OES_texture_npot"))
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return true;
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#else
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{
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GLint max_texture_size = 0;
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GLint max_native_instr = 0;
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/* try to detect actual npot support. might fail for older cards. */
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bool arb_npot = gl_query_extension("ARB_texture_non_power_of_two");
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bool arb_frag_program = gl_query_extension("ARB_fragment_program");
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glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
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#ifdef GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB
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if (arb_frag_program && glGetProgramivARB)
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glGetProgramivARB(GL_FRAGMENT_PROGRAM_ARB,
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GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB, &max_native_instr);
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#endif
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if (arb_npot && arb_frag_program &&
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(max_texture_size >= 8192) && (max_native_instr >= 4096))
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return true;
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}
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#endif
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break;
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case GL_CAPS_SRGB_FBO_ES3:
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#ifdef HAVE_OPENGLES
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if (major >= 3)
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return true;
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#else
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break;
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#endif
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case GL_CAPS_SRGB_FBO:
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#if defined(HAVE_OPENGLES)
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if (major >= 3 || gl_query_extension("EXT_sRGB"))
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return true;
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#endif
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if (gl_check_capability(GL_CAPS_FBO))
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{
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if ( gl_query_core_context_in_use() ||
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(gl_query_extension("EXT_texture_sRGB")
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&& gl_query_extension("ARB_framebuffer_sRGB"))
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)
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return true;
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}
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break;
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case GL_CAPS_FP_FBO:
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/* GLES - No extensions for float FBO currently. */
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#ifndef HAVE_OPENGLES
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if (gl_check_capability(GL_CAPS_FBO))
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{
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/* Float FBO is core in 3.2. */
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if (gl_query_core_context_in_use() || gl_query_extension("ARB_texture_float"))
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return true;
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}
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#endif
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break;
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case GL_CAPS_BGRA8888:
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#ifdef HAVE_OPENGLES
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/* There are both APPLE and EXT variants. */
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if (gl_query_extension("BGRA8888"))
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return true;
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#else
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return true;
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#endif
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break;
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case GL_CAPS_TEX_STORAGE:
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#ifdef HAVE_OPENGLES
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if (major >= 3)
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return true;
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#else
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if (vendor && strstr(vendor, "ATI Technologies"))
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return false;
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if (gl_query_extension("ARB_texture_storage"))
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return true;
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#endif
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break;
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case GL_CAPS_TEX_STORAGE_EXT:
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#ifdef TARGET_OS_IPHONE
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/* Not working on iOS */
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return false;
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#else
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if (gl_query_extension("EXT_texture_storage"))
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return true;
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#endif
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break;
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case GL_CAPS_NONE:
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default:
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break;
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}
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return false;
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}
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