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3bf00b6c6a
Rather than checking if the function name maps to a valid entry in the respective table, just create a dummy entry at the end of each table. This allows us to remove some unnessesary "index >= 0" checks, which get executed quite often. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
#include <string.h>
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#include <X11/Xlib.h>
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#include "glvnd/libglxabi.h"
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#include "glxglvnd.h"
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static Bool __glXGLVNDIsScreenSupported(Display *dpy, int screen)
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{
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/* TODO: Think of a better heuristic... */
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return True;
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}
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static void *__glXGLVNDGetProcAddress(const GLubyte *procName)
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{
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return glXGetProcAddressARB(procName);
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}
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static unsigned FindGLXFunction(const GLubyte *name)
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{
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unsigned first = 0;
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unsigned last = DI_FUNCTION_COUNT - 1;
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while (first <= last) {
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unsigned middle = (first + last) / 2;
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int comp = strcmp((const char *) name,
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__glXDispatchTableStrings[middle]);
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if (comp < 0)
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first = middle + 1;
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else if (comp > 0)
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last = middle - 1;
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else
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return middle;
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}
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/* Just point to the dummy entry at the end of the respective table */
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return DI_FUNCTION_COUNT;
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}
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static void *__glXGLVNDGetDispatchAddress(const GLubyte *procName)
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{
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unsigned internalIndex = FindGLXFunction(procName);
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return __glXDispatchFunctions[internalIndex];
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}
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static void __glXGLVNDSetDispatchIndex(const GLubyte *procName, int index)
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{
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unsigned internalIndex = FindGLXFunction(procName);
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__glXDispatchTableIndices[internalIndex] = index;
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}
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_X_EXPORT Bool __glx_Main(uint32_t version, const __GLXapiExports *exports,
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__GLXvendorInfo *vendor, __GLXapiImports *imports)
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{
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static Bool initDone = False;
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if (GLX_VENDOR_ABI_GET_MAJOR_VERSION(version) !=
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GLX_VENDOR_ABI_MAJOR_VERSION ||
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GLX_VENDOR_ABI_GET_MINOR_VERSION(version) <
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GLX_VENDOR_ABI_MINOR_VERSION)
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return False;
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if (!initDone) {
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initDone = True;
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__glXGLVNDAPIExports = exports;
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imports->isScreenSupported = __glXGLVNDIsScreenSupported;
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imports->getProcAddress = __glXGLVNDGetProcAddress;
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imports->getDispatchAddress = __glXGLVNDGetDispatchAddress;
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imports->setDispatchIndex = __glXGLVNDSetDispatchIndex;
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imports->notifyError = NULL;
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imports->isPatchSupported = NULL;
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imports->initiatePatch = NULL;
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}
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return True;
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}
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