--- /dev/null
+//========================================================================
+// GLFW 3.4 - www.glfw.org
+//------------------------------------------------------------------------
+// Copyright (c) 2002-2006 Marcus Geelnard
+// Copyright (c) 2006-2016 Camilla Löwy <elmindreda@glfw.org>
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would
+// be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such, and must not
+// be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source
+// distribution.
+//
+//========================================================================
+// Please use C89 style variable declarations in this file because VS 2010
+//========================================================================
+
+#include "internal.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+#include <stdio.h>
+
+
+//////////////////////////////////////////////////////////////////////////
+////// GLFW internal API //////
+//////////////////////////////////////////////////////////////////////////
+
+// Checks whether the desired context attributes are valid
+//
+// This function checks things like whether the specified client API version
+// exists and whether all relevant options have supported and non-conflicting
+// values
+//
+GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
+{
+ if (ctxconfig->share)
+ {
+ if (ctxconfig->client == GLFW_NO_API ||
+ ctxconfig->share->context.client == GLFW_NO_API)
+ {
+ _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
+ return GLFW_FALSE;
+ }
+ }
+
+ if (ctxconfig->source != GLFW_NATIVE_CONTEXT_API &&
+ ctxconfig->source != GLFW_EGL_CONTEXT_API &&
+ ctxconfig->source != GLFW_OSMESA_CONTEXT_API)
+ {
+ _glfwInputError(GLFW_INVALID_ENUM,
+ "Invalid context creation API 0x%08X",
+ ctxconfig->source);
+ return GLFW_FALSE;
+ }
+
+ if (ctxconfig->client != GLFW_NO_API &&
+ ctxconfig->client != GLFW_OPENGL_API &&
+ ctxconfig->client != GLFW_OPENGL_ES_API)
+ {
+ _glfwInputError(GLFW_INVALID_ENUM,
+ "Invalid client API 0x%08X",
+ ctxconfig->client);
+ return GLFW_FALSE;
+ }
+
+ if (ctxconfig->client == GLFW_OPENGL_API)
+ {
+ if ((ctxconfig->major < 1 || ctxconfig->minor < 0) ||
+ (ctxconfig->major == 1 && ctxconfig->minor > 5) ||
+ (ctxconfig->major == 2 && ctxconfig->minor > 1) ||
+ (ctxconfig->major == 3 && ctxconfig->minor > 3))
+ {
+ // OpenGL 1.0 is the smallest valid version
+ // OpenGL 1.x series ended with version 1.5
+ // OpenGL 2.x series ended with version 2.1
+ // OpenGL 3.x series ended with version 3.3
+ // For now, let everything else through
+
+ _glfwInputError(GLFW_INVALID_VALUE,
+ "Invalid OpenGL version %i.%i",
+ ctxconfig->major, ctxconfig->minor);
+ return GLFW_FALSE;
+ }
+
+ if (ctxconfig->profile)
+ {
+ if (ctxconfig->profile != GLFW_OPENGL_CORE_PROFILE &&
+ ctxconfig->profile != GLFW_OPENGL_COMPAT_PROFILE)
+ {
+ _glfwInputError(GLFW_INVALID_ENUM,
+ "Invalid OpenGL profile 0x%08X",
+ ctxconfig->profile);
+ return GLFW_FALSE;
+ }
+
+ if (ctxconfig->major <= 2 ||
+ (ctxconfig->major == 3 && ctxconfig->minor < 2))
+ {
+ // Desktop OpenGL context profiles are only defined for version 3.2
+ // and above
+
+ _glfwInputError(GLFW_INVALID_VALUE,
+ "Context profiles are only defined for OpenGL version 3.2 and above");
+ return GLFW_FALSE;
+ }
+ }
+
+ if (ctxconfig->forward && ctxconfig->major <= 2)
+ {
+ // Forward-compatible contexts are only defined for OpenGL version 3.0 and above
+ _glfwInputError(GLFW_INVALID_VALUE,
+ "Forward-compatibility is only defined for OpenGL version 3.0 and above");
+ return GLFW_FALSE;
+ }
+ }
+ else if (ctxconfig->client == GLFW_OPENGL_ES_API)
+ {
+ if (ctxconfig->major < 1 || ctxconfig->minor < 0 ||
+ (ctxconfig->major == 1 && ctxconfig->minor > 1) ||
+ (ctxconfig->major == 2 && ctxconfig->minor > 0))
+ {
+ // OpenGL ES 1.0 is the smallest valid version
+ // OpenGL ES 1.x series ended with version 1.1
+ // OpenGL ES 2.x series ended with version 2.0
+ // For now, let everything else through
+
+ _glfwInputError(GLFW_INVALID_VALUE,
+ "Invalid OpenGL ES version %i.%i",
+ ctxconfig->major, ctxconfig->minor);
+ return GLFW_FALSE;
+ }
+ }
+
+ if (ctxconfig->robustness)
+ {
+ if (ctxconfig->robustness != GLFW_NO_RESET_NOTIFICATION &&
+ ctxconfig->robustness != GLFW_LOSE_CONTEXT_ON_RESET)
+ {
+ _glfwInputError(GLFW_INVALID_ENUM,
+ "Invalid context robustness mode 0x%08X",
+ ctxconfig->robustness);
+ return GLFW_FALSE;
+ }
+ }
+
+ if (ctxconfig->release)
+ {
+ if (ctxconfig->release != GLFW_RELEASE_BEHAVIOR_NONE &&
+ ctxconfig->release != GLFW_RELEASE_BEHAVIOR_FLUSH)
+ {
+ _glfwInputError(GLFW_INVALID_ENUM,
+ "Invalid context release behavior 0x%08X",
+ ctxconfig->release);
+ return GLFW_FALSE;
+ }
+ }
+
+ return GLFW_TRUE;
+}
+
+// Chooses the framebuffer config that best matches the desired one
+//
+const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
+ const _GLFWfbconfig* alternatives,
+ unsigned int count)
+{
+ unsigned int i;
+ unsigned int missing, leastMissing = UINT_MAX;
+ unsigned int colorDiff, leastColorDiff = UINT_MAX;
+ unsigned int extraDiff, leastExtraDiff = UINT_MAX;
+ const _GLFWfbconfig* current;
+ const _GLFWfbconfig* closest = NULL;
+
+ for (i = 0; i < count; i++)
+ {
+ current = alternatives + i;
+
+ if (desired->stereo > 0 && current->stereo == 0)
+ {
+ // Stereo is a hard constraint
+ continue;
+ }
+
+ if (desired->doublebuffer != current->doublebuffer)
+ {
+ // Double buffering is a hard constraint
+ continue;
+ }
+
+ // Count number of missing buffers
+ {
+ missing = 0;
+
+ if (desired->alphaBits > 0 && current->alphaBits == 0)
+ missing++;
+
+ if (desired->depthBits > 0 && current->depthBits == 0)
+ missing++;
+
+ if (desired->stencilBits > 0 && current->stencilBits == 0)
+ missing++;
+
+ if (desired->auxBuffers > 0 &&
+ current->auxBuffers < desired->auxBuffers)
+ {
+ missing += desired->auxBuffers - current->auxBuffers;
+ }
+
+ if (desired->samples > 0 && current->samples == 0)
+ {
+ // Technically, several multisampling buffers could be
+ // involved, but that's a lower level implementation detail and
+ // not important to us here, so we count them as one
+ missing++;
+ }
+
+ if (desired->transparent != current->transparent)
+ missing++;
+ }
+
+ // These polynomials make many small channel size differences matter
+ // less than one large channel size difference
+
+ // Calculate color channel size difference value
+ {
+ colorDiff = 0;
+
+ if (desired->redBits != GLFW_DONT_CARE)
+ {
+ colorDiff += (desired->redBits - current->redBits) *
+ (desired->redBits - current->redBits);
+ }
+
+ if (desired->greenBits != GLFW_DONT_CARE)
+ {
+ colorDiff += (desired->greenBits - current->greenBits) *
+ (desired->greenBits - current->greenBits);
+ }
+
+ if (desired->blueBits != GLFW_DONT_CARE)
+ {
+ colorDiff += (desired->blueBits - current->blueBits) *
+ (desired->blueBits - current->blueBits);
+ }
+ }
+
+ // Calculate non-color channel size difference value
+ {
+ extraDiff = 0;
+
+ if (desired->alphaBits != GLFW_DONT_CARE)
+ {
+ extraDiff += (desired->alphaBits - current->alphaBits) *
+ (desired->alphaBits - current->alphaBits);
+ }
+
+ if (desired->depthBits != GLFW_DONT_CARE)
+ {
+ extraDiff += (desired->depthBits - current->depthBits) *
+ (desired->depthBits - current->depthBits);
+ }
+
+ if (desired->stencilBits != GLFW_DONT_CARE)
+ {
+ extraDiff += (desired->stencilBits - current->stencilBits) *
+ (desired->stencilBits - current->stencilBits);
+ }
+
+ if (desired->accumRedBits != GLFW_DONT_CARE)
+ {
+ extraDiff += (desired->accumRedBits - current->accumRedBits) *
+ (desired->accumRedBits - current->accumRedBits);
+ }
+
+ if (desired->accumGreenBits != GLFW_DONT_CARE)
+ {
+ extraDiff += (desired->accumGreenBits - current->accumGreenBits) *
+ (desired->accumGreenBits - current->accumGreenBits);
+ }
+
+ if (desired->accumBlueBits != GLFW_DONT_CARE)
+ {
+ extraDiff += (desired->accumBlueBits - current->accumBlueBits) *
+ (desired->accumBlueBits - current->accumBlueBits);
+ }
+
+ if (desired->accumAlphaBits != GLFW_DONT_CARE)
+ {
+ extraDiff += (desired->accumAlphaBits - current->accumAlphaBits) *
+ (desired->accumAlphaBits - current->accumAlphaBits);
+ }
+
+ if (desired->samples != GLFW_DONT_CARE)
+ {
+ extraDiff += (desired->samples - current->samples) *
+ (desired->samples - current->samples);
+ }
+
+ if (desired->sRGB && !current->sRGB)
+ extraDiff++;
+ }
+
+ // Figure out if the current one is better than the best one found so far
+ // Least number of missing buffers is the most important heuristic,
+ // then color buffer size match and lastly size match for other buffers
+
+ if (missing < leastMissing)
+ closest = current;
+ else if (missing == leastMissing)
+ {
+ if ((colorDiff < leastColorDiff) ||
+ (colorDiff == leastColorDiff && extraDiff < leastExtraDiff))
+ {
+ closest = current;
+ }
+ }
+
+ if (current == closest)
+ {
+ leastMissing = missing;
+ leastColorDiff = colorDiff;
+ leastExtraDiff = extraDiff;
+ }
+ }
+
+ return closest;
+}
+
+// Retrieves the attributes of the current context
+//
+GLFWbool _glfwRefreshContextAttribs(_GLFWwindow* window,
+ const _GLFWctxconfig* ctxconfig)
+{
+ int i;
+ _GLFWwindow* previous;
+ const char* version;
+ const char* prefixes[] =
+ {
+ "OpenGL ES-CM ",
+ "OpenGL ES-CL ",
+ "OpenGL ES ",
+ NULL
+ };
+
+ window->context.source = ctxconfig->source;
+ window->context.client = GLFW_OPENGL_API;
+
+ previous = _glfwPlatformGetTls(&_glfw.contextSlot);
+ glfwMakeContextCurrent((GLFWwindow*) window);
+
+ window->context.GetIntegerv = (PFNGLGETINTEGERVPROC)
+ window->context.getProcAddress("glGetIntegerv");
+ window->context.GetString = (PFNGLGETSTRINGPROC)
+ window->context.getProcAddress("glGetString");
+ if (!window->context.GetIntegerv || !window->context.GetString)
+ {
+ _glfwInputError(GLFW_PLATFORM_ERROR, "Entry point retrieval is broken");
+ glfwMakeContextCurrent((GLFWwindow*) previous);
+ return GLFW_FALSE;
+ }
+
+ version = (const char*) window->context.GetString(GL_VERSION);
+ if (!version)
+ {
+ if (ctxconfig->client == GLFW_OPENGL_API)
+ {
+ _glfwInputError(GLFW_PLATFORM_ERROR,
+ "OpenGL version string retrieval is broken");
+ }
+ else
+ {
+ _glfwInputError(GLFW_PLATFORM_ERROR,
+ "OpenGL ES version string retrieval is broken");
+ }
+
+ glfwMakeContextCurrent((GLFWwindow*) previous);
+ return GLFW_FALSE;
+ }
+
+ for (i = 0; prefixes[i]; i++)
+ {
+ const size_t length = strlen(prefixes[i]);
+
+ if (strncmp(version, prefixes[i], length) == 0)
+ {
+ version += length;
+ window->context.client = GLFW_OPENGL_ES_API;
+ break;
+ }
+ }
+
+ if (!sscanf(version, "%d.%d.%d",
+ &window->context.major,
+ &window->context.minor,
+ &window->context.revision))
+ {
+ if (window->context.client == GLFW_OPENGL_API)
+ {
+ _glfwInputError(GLFW_PLATFORM_ERROR,
+ "No version found in OpenGL version string");
+ }
+ else
+ {
+ _glfwInputError(GLFW_PLATFORM_ERROR,
+ "No version found in OpenGL ES version string");
+ }
+
+ glfwMakeContextCurrent((GLFWwindow*) previous);
+ return GLFW_FALSE;
+ }
+
+ if (window->context.major < ctxconfig->major ||
+ (window->context.major == ctxconfig->major &&
+ window->context.minor < ctxconfig->minor))
+ {
+ // The desired OpenGL version is greater than the actual version
+ // This only happens if the machine lacks {GLX|WGL}_ARB_create_context
+ // /and/ the user has requested an OpenGL version greater than 1.0
+
+ // For API consistency, we emulate the behavior of the
+ // {GLX|WGL}_ARB_create_context extension and fail here
+
+ if (window->context.client == GLFW_OPENGL_API)
+ {
+ _glfwInputError(GLFW_VERSION_UNAVAILABLE,
+ "Requested OpenGL version %i.%i, got version %i.%i",
+ ctxconfig->major, ctxconfig->minor,
+ window->context.major, window->context.minor);
+ }
+ else
+ {
+ _glfwInputError(GLFW_VERSION_UNAVAILABLE,
+ "Requested OpenGL ES version %i.%i, got version %i.%i",
+ ctxconfig->major, ctxconfig->minor,
+ window->context.major, window->context.minor);
+ }
+
+ glfwMakeContextCurrent((GLFWwindow*) previous);
+ return GLFW_FALSE;
+ }
+
+ if (window->context.major >= 3)
+ {
+ // OpenGL 3.0+ uses a different function for extension string retrieval
+ // We cache it here instead of in glfwExtensionSupported mostly to alert
+ // users as early as possible that their build may be broken
+
+ window->context.GetStringi = (PFNGLGETSTRINGIPROC)
+ window->context.getProcAddress("glGetStringi");
+ if (!window->context.GetStringi)
+ {
+ _glfwInputError(GLFW_PLATFORM_ERROR,
+ "Entry point retrieval is broken");
+ glfwMakeContextCurrent((GLFWwindow*) previous);
+ return GLFW_FALSE;
+ }
+ }
+
+ if (window->context.client == GLFW_OPENGL_API)
+ {
+ // Read back context flags (OpenGL 3.0 and above)
+ if (window->context.major >= 3)
+ {
+ GLint flags;
+ window->context.GetIntegerv(GL_CONTEXT_FLAGS, &flags);
+
+ if (flags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT)
+ window->context.forward = GLFW_TRUE;
+
+ if (flags & GL_CONTEXT_FLAG_DEBUG_BIT)
+ window->context.debug = GLFW_TRUE;
+ else if (glfwExtensionSupported("GL_ARB_debug_output") &&
+ ctxconfig->debug)
+ {
+ // HACK: This is a workaround for older drivers (pre KHR_debug)
+ // not setting the debug bit in the context flags for
+ // debug contexts
+ window->context.debug = GLFW_TRUE;
+ }
+
+ if (flags & GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR)
+ window->context.noerror = GLFW_TRUE;
+ }
+
+ // Read back OpenGL context profile (OpenGL 3.2 and above)
+ if (window->context.major >= 4 ||
+ (window->context.major == 3 && window->context.minor >= 2))
+ {
+ GLint mask;
+ window->context.GetIntegerv(GL_CONTEXT_PROFILE_MASK, &mask);
+
+ if (mask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT)
+ window->context.profile = GLFW_OPENGL_COMPAT_PROFILE;
+ else if (mask & GL_CONTEXT_CORE_PROFILE_BIT)
+ window->context.profile = GLFW_OPENGL_CORE_PROFILE;
+ else if (glfwExtensionSupported("GL_ARB_compatibility"))
+ {
+ // HACK: This is a workaround for the compatibility profile bit
+ // not being set in the context flags if an OpenGL 3.2+
+ // context was created without having requested a specific
+ // version
+ window->context.profile = GLFW_OPENGL_COMPAT_PROFILE;
+ }
+ }
+
+ // Read back robustness strategy
+ if (glfwExtensionSupported("GL_ARB_robustness"))
+ {
+ // NOTE: We avoid using the context flags for detection, as they are
+ // only present from 3.0 while the extension applies from 1.1
+
+ GLint strategy;
+ window->context.GetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_ARB,
+ &strategy);
+
+ if (strategy == GL_LOSE_CONTEXT_ON_RESET_ARB)
+ window->context.robustness = GLFW_LOSE_CONTEXT_ON_RESET;
+ else if (strategy == GL_NO_RESET_NOTIFICATION_ARB)
+ window->context.robustness = GLFW_NO_RESET_NOTIFICATION;
+ }
+ }
+ else
+ {
+ // Read back robustness strategy
+ if (glfwExtensionSupported("GL_EXT_robustness"))
+ {
+ // NOTE: The values of these constants match those of the OpenGL ARB
+ // one, so we can reuse them here
+
+ GLint strategy;
+ window->context.GetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_ARB,
+ &strategy);
+
+ if (strategy == GL_LOSE_CONTEXT_ON_RESET_ARB)
+ window->context.robustness = GLFW_LOSE_CONTEXT_ON_RESET;
+ else if (strategy == GL_NO_RESET_NOTIFICATION_ARB)
+ window->context.robustness = GLFW_NO_RESET_NOTIFICATION;
+ }
+ }
+
+ if (glfwExtensionSupported("GL_KHR_context_flush_control"))
+ {
+ GLint behavior;
+ window->context.GetIntegerv(GL_CONTEXT_RELEASE_BEHAVIOR, &behavior);
+
+ if (behavior == GL_NONE)
+ window->context.release = GLFW_RELEASE_BEHAVIOR_NONE;
+ else if (behavior == GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH)
+ window->context.release = GLFW_RELEASE_BEHAVIOR_FLUSH;
+ }
+
+ // Clearing the front buffer to black to avoid garbage pixels left over from
+ // previous uses of our bit of VRAM
+ {
+ PFNGLCLEARPROC glClear = (PFNGLCLEARPROC)
+ window->context.getProcAddress("glClear");
+ glClear(GL_COLOR_BUFFER_BIT);
+ window->context.swapBuffers(window);
+ }
+
+ glfwMakeContextCurrent((GLFWwindow*) previous);
+ return GLFW_TRUE;
+}
+
+// Searches an extension string for the specified extension
+//
+GLFWbool _glfwStringInExtensionString(const char* string, const char* extensions)
+{
+ const char* start = extensions;
+
+ for (;;)
+ {
+ const char* where;
+ const char* terminator;
+
+ where = strstr(start, string);
+ if (!where)
+ return GLFW_FALSE;
+
+ terminator = where + strlen(string);
+ if (where == start || *(where - 1) == ' ')
+ {
+ if (*terminator == ' ' || *terminator == '\0')
+ break;
+ }
+
+ start = terminator;
+ }
+
+ return GLFW_TRUE;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+////// GLFW public API //////
+//////////////////////////////////////////////////////////////////////////
+
+GLFWAPI void glfwMakeContextCurrent(GLFWwindow* handle)
+{
+ _GLFWwindow* window = (_GLFWwindow*) handle;
+ _GLFWwindow* previous = _glfwPlatformGetTls(&_glfw.contextSlot);
+
+ _GLFW_REQUIRE_INIT();
+
+ if (window && window->context.client == GLFW_NO_API)
+ {
+ _glfwInputError(GLFW_NO_WINDOW_CONTEXT,
+ "Cannot make current with a window that has no OpenGL or OpenGL ES context");
+ return;
+ }
+
+ if (previous)
+ {
+ if (!window || window->context.source != previous->context.source)
+ previous->context.makeCurrent(NULL);
+ }
+
+ if (window)
+ window->context.makeCurrent(window);
+}
+
+GLFWAPI GLFWwindow* glfwGetCurrentContext(void)
+{
+ _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
+ return _glfwPlatformGetTls(&_glfw.contextSlot);
+}
+
+GLFWAPI void glfwSwapBuffers(GLFWwindow* handle)
+{
+ _GLFWwindow* window = (_GLFWwindow*) handle;
+ assert(window != NULL);
+
+ _GLFW_REQUIRE_INIT();
+
+ if (window->context.client == GLFW_NO_API)
+ {
+ _glfwInputError(GLFW_NO_WINDOW_CONTEXT,
+ "Cannot swap buffers of a window that has no OpenGL or OpenGL ES context");
+ return;
+ }
+
+ window->context.swapBuffers(window);
+}
+
+GLFWAPI void glfwSwapInterval(int interval)
+{
+ _GLFWwindow* window;
+
+ _GLFW_REQUIRE_INIT();
+
+ window = _glfwPlatformGetTls(&_glfw.contextSlot);
+ if (!window)
+ {
+ _glfwInputError(GLFW_NO_CURRENT_CONTEXT,
+ "Cannot set swap interval without a current OpenGL or OpenGL ES context");
+ return;
+ }
+
+ window->context.swapInterval(interval);
+}
+
+GLFWAPI int glfwExtensionSupported(const char* extension)
+{
+ _GLFWwindow* window;
+ assert(extension != NULL);
+
+ _GLFW_REQUIRE_INIT_OR_RETURN(GLFW_FALSE);
+
+ window = _glfwPlatformGetTls(&_glfw.contextSlot);
+ if (!window)
+ {
+ _glfwInputError(GLFW_NO_CURRENT_CONTEXT,
+ "Cannot query extension without a current OpenGL or OpenGL ES context");
+ return GLFW_FALSE;
+ }
+
+ if (*extension == '\0')
+ {
+ _glfwInputError(GLFW_INVALID_VALUE, "Extension name cannot be an empty string");
+ return GLFW_FALSE;
+ }
+
+ if (window->context.major >= 3)
+ {
+ int i;
+ GLint count;
+
+ // Check if extension is in the modern OpenGL extensions string list
+
+ window->context.GetIntegerv(GL_NUM_EXTENSIONS, &count);
+
+ for (i = 0; i < count; i++)
+ {
+ const char* en = (const char*)
+ window->context.GetStringi(GL_EXTENSIONS, i);
+ if (!en)
+ {
+ _glfwInputError(GLFW_PLATFORM_ERROR,
+ "Extension string retrieval is broken");
+ return GLFW_FALSE;
+ }
+
+ if (strcmp(en, extension) == 0)
+ return GLFW_TRUE;
+ }
+ }
+ else
+ {
+ // Check if extension is in the old style OpenGL extensions string
+
+ const char* extensions = (const char*)
+ window->context.GetString(GL_EXTENSIONS);
+ if (!extensions)
+ {
+ _glfwInputError(GLFW_PLATFORM_ERROR,
+ "Extension string retrieval is broken");
+ return GLFW_FALSE;
+ }
+
+ if (_glfwStringInExtensionString(extension, extensions))
+ return GLFW_TRUE;
+ }
+
+ // Check if extension is in the platform-specific string
+ return window->context.extensionSupported(extension);
+}
+
+GLFWAPI GLFWglproc glfwGetProcAddress(const char* procname)
+{
+ _GLFWwindow* window;
+ assert(procname != NULL);
+
+ _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
+
+ window = _glfwPlatformGetTls(&_glfw.contextSlot);
+ if (!window)
+ {
+ _glfwInputError(GLFW_NO_CURRENT_CONTEXT,
+ "Cannot query entry point without a current OpenGL or OpenGL ES context");
+ return NULL;
+ }
+
+ return window->context.getProcAddress(procname);
+}
+
projects / pistorm / blobdiff