Mercurial > sdl-ios-xcode
view src/video/riscos/SDL_wimppoll.c @ 1554:0ca607a5d173
Fixed bug #84
Date: Sun, 23 Oct 2005 16:39:03 +0200
From: "A. Schmid" <sahib@phreaker.net>
Subject: [SDL] no software surfaces with svgalib driver?
Hi,
I noticed that the SDL (1.2.9) svgalib driver only makes use of linear
addressable (framebuffer) video modes. On older systems (like one of
mine), linear addressable modes are often not available.
Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is
unusable, since VESA only supports framebuffering for VBE 2.0 and later.
The changes necessary to add support for software surfaces seem to be
relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see
attached patch). The code worked fine for me, but it is no more than a
proof of concept and should be reviewed (probably has a memory leak when
switching modes). It also uses the vgagl library (included in the
svgalib package) and needs to be linked against it.
-Alex
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 19 Mar 2006 12:04:40 +0000 |
parents | a30f8553eeb1 |
children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" /* File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability 27 March 2003 Implements Pumping of events and WIMP polling */ #include "SDL.h" #include "SDL_syswm.h" #include "../../events/SDL_sysevents.h" #include "../../events/SDL_events_c.h" #include "SDL_riscosvideo.h" #include "SDL_riscosevents_c.h" #include "SDL_riscosmouse_c.h" #include "../../timer/SDL_timer_c.h" #include "memory.h" #include "stdlib.h" #include "ctype.h" #include "kernel.h" #include "swis.h" #include "unixlib/os.h" #if !SDL_THREADS_DISABLED #include <pthread.h> #endif /* Local functions */ void WIMP_Poll(_THIS, int waitTime); void WIMP_SetFocus(int win); /* SDL_riscossprite functions */ void WIMP_PlotSprite(_THIS, int x, int y); void WIMP_ModeChanged(_THIS); void WIMP_PaletteChanged(_THIS); extern void WIMP_PollMouse(_THIS); extern void RISCOS_PollKeyboard(); #if SDL_THREADS_DISABLED /* Timer running function */ extern void RISCOS_CheckTimer(); #else extern int riscos_using_threads; #endif /* Mouse cursor handling */ extern void WIMP_ReshowCursor(_THIS); extern void WIMP_RestoreWimpCursor(); int hasFocus = 0; int mouseInWindow = 0; /* Flag to ensure window is correct size after a mode change */ static int resizeOnOpen = 0; void WIMP_PumpEvents(_THIS) { WIMP_Poll(this, 0); if (hasFocus) RISCOS_PollKeyboard(); if (mouseInWindow) WIMP_PollMouse(this); #if SDL_THREADS_DISABLED if (SDL_timer_running) RISCOS_CheckTimer(); #endif } void WIMP_Poll(_THIS, int waitTime) { _kernel_swi_regs regs; int message[64]; unsigned int code; int pollMask = 0; int doPoll = 1; int sysEvent; int sdlWindow = this->hidden->window_handle; if (this->PumpEvents != WIMP_PumpEvents) return; if (waitTime > 0) { _kernel_swi(OS_ReadMonotonicTime, ®s, ®s); waitTime += regs.r[0]; } while (doPoll) { #if !SDL_THREADS_DISABLED /* Stop thread callbacks while program is paged out */ if (riscos_using_threads) __pthread_stop_ticker(); #endif if (waitTime <= 0) { regs.r[0] = pollMask; /* Poll Mask */ /* For no wait time mask out null event so we wait until something happens */ if (waitTime < 0) regs.r[0] |= 1; regs.r[1] = (int)message; _kernel_swi(Wimp_Poll, ®s, ®s); } else { regs.r[0] = pollMask; regs.r[1] = (int)message; regs.r[2] = waitTime; _kernel_swi(Wimp_PollIdle, ®s, ®s); } /* Flag to specify if we post a SDL_SysWMEvent */ sysEvent = 0; code = (unsigned int)regs.r[0]; switch(code) { case 0: /* Null Event - drop out for standard processing*/ doPoll = 0; break; case 1: /* Redraw window */ _kernel_swi(Wimp_RedrawWindow, ®s,®s); if (message[0] == sdlWindow) { while (regs.r[0]) { WIMP_PlotSprite(this, message[1], message[2]); _kernel_swi(Wimp_GetRectangle, ®s, ®s); } } else { /* TODO: Currently we just eat them - we may need to pass them on */ while (regs.r[0]) { _kernel_swi(Wimp_GetRectangle, ®s, ®s); } } break; case 2: /* Open window */ if ( resizeOnOpen && message[0] == sdlWindow) { /* Ensure window is correct size */ resizeOnOpen = 0; message[3] = message[1] + (this->screen->w << this->hidden->xeig); message[4] = message[2] + (this->screen->h << this->hidden->yeig); } _kernel_swi(Wimp_OpenWindow, ®s, ®s); break; case 3: /* Close window */ if (message[0] == sdlWindow) { /* Documentation makes it looks as if the following line is correct: ** if (SDL_PrivateQuit() == 1) _kernel_swi(Wimp_CloseWindow, ®s, ®s); ** However some programs don't process this message and so sit there invisibly ** in the background so I just post the quit message and hope the application ** does the correct thing. */ SDL_PrivateQuit(); } else sysEvent = 1; doPoll = 0; break; case 4: /* Pointer_Leaving_Window */ if (message[0] == sdlWindow) { mouseInWindow = 0; //TODO: Lose buttons / dragging /* Reset to default pointer */ WIMP_RestoreWimpCursor(); SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS); } else sysEvent = 1; break; case 5: /* Pointer_Entering_Window */ if (message[0] == sdlWindow) { mouseInWindow = 1; WIMP_ReshowCursor(this); SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS); } else sysEvent = 1; break; case 6: /* Mouse_Click */ if (hasFocus == 0) { /* First click gives focus if it's not a menu */ /* we only count non-menu clicks on a window that has the focus */ WIMP_SetFocus(message[3]); } else doPoll = 0; // So PollMouse gets a chance to pick it up break; case 7: /* User_Drag_Box - Used for mouse release */ //TODO: May need to implement this in the future sysEvent = 1; break; case 8: /* Keypressed */ doPoll = 0; /* PollKeyboard should pick it up */ if (message[0] != sdlWindow) sysEvent = 1; /*TODO: May want to always pass F12 etc to the wimp { regs.r[0] = message[6]; _kernel_swi(Wimp_ProcessKey, ®s, ®s); } */ break; case 11: /* Lose Caret */ hasFocus = 0; if (message[0] == sdlWindow) SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS); else sysEvent = 1; break; case 12: /* Gain Caret */ hasFocus = 1; if (message[0] == sdlWindow) SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS); else sysEvent = 1; break; case 17: case 18: sysEvent = 1; /* All messages are passed on */ switch(message[4]) { case 0: /* Quit Event */ /* No choice - have to quit */ SDL_Quit(); exit(0); break; case 8: /* Pre Quit */ SDL_PrivateQuit(); break; case 0x400c1: /* Mode change */ WIMP_ModeChanged(this); resizeOnOpen = 1; break; case 9: /* Palette changed */ WIMP_PaletteChanged(this); break; } break; default: /* Pass unknown events on */ sysEvent = 1; break; } if (sysEvent) { SDL_SysWMmsg wmmsg; SDL_VERSION(&wmmsg.version); wmmsg.eventCode = code; SDL_memcpy(wmmsg.pollBlock, message, 64 * sizeof(int)); /* Fall out of polling loop if message is successfully posted */ if (SDL_PrivateSysWMEvent(&wmmsg)) doPoll = 0; } #if !SDL_THREADS_DISABLED if (riscos_using_threads) { /* Restart ticker here so other thread can not interfere with the Redraw processing */ if (riscos_using_threads) __pthread_start_ticker(); /* Give other threads a better chance of running */ pthread_yield(); } #endif } } /* Set focus to specified window */ void WIMP_SetFocus(int win) { _kernel_swi_regs regs; regs.r[0] = win; regs.r[1] = -1; /* Icon handle */ regs.r[2] = 0; /* X-offset we just put it at position 0 */ regs.r[3] = 0; /* Y-offset as above */ regs.r[4] = 1 << 25; /* Caret is invisible */ regs.r[5] = 0; /* index into string */ _kernel_swi(Wimp_SetCaretPosition, ®s, ®s); } /** Run background task while in a sleep command */ void RISCOS_BackgroundTasks(void) { if (current_video && current_video->hidden->window_handle) { WIMP_Poll(current_video, 0); } #if SDL_THREADS_DISABLED if (SDL_timer_running) RISCOS_CheckTimer(); #endif }