Mercurial > sdl-ios-xcode
view src/video/dga/SDL_dgaevents.c @ 1542:a8bf1aa21020
Fixed bug #15
SDL_blit_A.mmx-speed.patch.txt --
Speed improvements and a bugfix for the current GCC inline mmx
asm code:
- Changed some ops and removed some resulting useless ones.
- Added some instruction parallelism (some gain)
The resulting speed on my Xeon improved upto 35% depending on
the function (measured in fps).
- Fixed a bug where BlitRGBtoRGBSurfaceAlphaMMX() was
setting the alpha component on the destination surfaces (to
opaque-alpha) even when the surface had none.
SDL_blit_A.mmx-msvc.patch.txt --
MSVC mmx intrinsics version of the same GCC asm code.
MSVC compiler tries to parallelize the code and to avoid
register stalls, but does not always do a very good job.
Per-surface blending MSVC functions run quite a bit faster
than their pure-asm counterparts (upto 55% faster for 16bit
ones), but the per-pixel blending runs somewhat slower than asm.
- BlitRGBtoRGBSurfaceAlphaMMX and BlitRGBtoRGBPixelAlphaMMX (and all
variants) can now also handle formats other than (A)RGB8888. Formats
like RGBA8888 and some quite exotic ones are allowed -- like
RAGB8888, or actually anything having channels aligned on 8bit
boundary and full 8bit alpha (for per-pixel alpha blending).
The performance cost of this change is virtually 0 for per-surface
alpha blending (no extra ops inside the loop) and a single non-MMX
op inside the loop for per-pixel blending. In testing, the per-pixel
alpha blending takes a ~2% performance hit, but it still runs much
faster than the current code in CVS. If necessary, a separate function
with this functionality can be made.
This code requires Processor Pack for VC6.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Wed, 15 Mar 2006 15:39:29 +0000 |
parents | d910939febfa |
children | 3ba88cb7eb1b |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2006 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" /* Handle the event stream, converting DGA events into SDL events */ #include <stdio.h> #include <X11/Xlib.h> #include "../Xext/extensions/xf86dga.h" #include "../SDL_sysvideo.h" #include "../../events/SDL_events_c.h" #include "SDL_dgavideo.h" #include "SDL_dgaevents_c.h" /* get function pointers... */ #include "../x11/SDL_x11dyn.h" /* Heheh we're using X11 event code */ extern int X11_Pending(Display *display); extern void X11_InitKeymap(void); extern SDLKey X11_TranslateKeycode(Display *display, KeyCode kc); static int DGA_DispatchEvent(_THIS) { int posted; SDL_NAME(XDGAEvent) xevent; pXNextEvent(DGA_Display, (XEvent *)&xevent); posted = 0; xevent.type -= DGA_event_base; switch (xevent.type) { /* Mouse motion? */ case MotionNotify: { if ( SDL_VideoSurface ) { posted = SDL_PrivateMouseMotion(0, 1, xevent.xmotion.dx, xevent.xmotion.dy); } } break; /* Mouse button press? */ case ButtonPress: { posted = SDL_PrivateMouseButton(SDL_PRESSED, xevent.xbutton.button, 0, 0); } break; /* Mouse button release? */ case ButtonRelease: { posted = SDL_PrivateMouseButton(SDL_RELEASED, xevent.xbutton.button, 0, 0); } break; /* Key press? */ case KeyPress: { SDL_keysym keysym; KeyCode keycode; XKeyEvent xkey; SDL_NAME(XDGAKeyEventToXKeyEvent)(&xevent.xkey, &xkey); keycode = xkey.keycode; #ifdef DEBUG_XEVENTS printf("KeyPress (X11 keycode = 0x%X)\n", xkey.keycode); #endif /* Get the translated SDL virtual keysym */ keysym.scancode = keycode; keysym.sym = X11_TranslateKeycode(DGA_Display, keycode); keysym.mod = KMOD_NONE; keysym.unicode = 0; /* Look up the translated value for the key event */ if ( SDL_TranslateUNICODE ) { static XComposeStatus state; char keybuf[32]; if ( pXLookupString(&xkey, keybuf, sizeof(keybuf), NULL, &state) ) { /* * FIXME: XLookupString() may yield more than one * character, so we need a mechanism to allow for * this (perhaps null keypress events with a * unicode value) */ keysym.unicode = (Uint8)keybuf[0]; } } posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym); } break; /* Key release? */ case KeyRelease: { SDL_keysym keysym; KeyCode keycode; XKeyEvent xkey; SDL_NAME(XDGAKeyEventToXKeyEvent)(&xevent.xkey, &xkey); keycode = xkey.keycode; #ifdef DEBUG_XEVENTS printf("KeyRelease (X11 keycode = 0x%X)\n", xkey.keycode); #endif /* Get the translated SDL virtual keysym */ keysym.scancode = keycode; keysym.sym = X11_TranslateKeycode(DGA_Display, keycode); keysym.mod = KMOD_NONE; keysym.unicode = 0; posted = SDL_PrivateKeyboard(SDL_RELEASED, &keysym); } break; break; } return(posted); } void DGA_PumpEvents(_THIS) { /* Keep processing pending events */ LOCK_DISPLAY(); while ( X11_Pending(DGA_Display) ) { DGA_DispatchEvent(this); } UNLOCK_DISPLAY(); } void DGA_InitOSKeymap(_THIS) { X11_InitKeymap(); }