| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2012 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 mouse cursor shape definitions and positioning |
| */ |
| |
| #include "SDL_mouse.h" |
| #include "../../events/SDL_events_c.h" |
| |
| #include "SDL_riscosmouse_c.h" |
| |
| #include "kernel.h" |
| #include "swis.h" |
| |
| static WMcursor *current_cursor = NULL; |
| static WMcursor *defined_cursor = NULL; |
| |
| extern int mouseInWindow; |
| |
| /* Area to save cursor palette colours changed by SDL. |
| Actual values will be read before we change to the SDL cursor */ |
| static Uint8 wimp_cursor_palette[2][5] = { |
| {1, 25, 255, 255, 255}, |
| {3, 25, 255, 255, 255} |
| }; |
| |
| static int cursor_palette_saved = 0; |
| |
| void WIMP_SaveCursorPalette(); |
| void WIMP_RestoreWimpCursor(); |
| void WIMP_SetSDLCursorPalette(); |
| |
| |
| void RISCOS_FreeWMCursor(_THIS, WMcursor *cursor) |
| { |
| SDL_free(cursor->data); |
| SDL_free(cursor); |
| } |
| |
| WMcursor *RISCOS_CreateWMCursor(_THIS, |
| Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) |
| { |
| WMcursor *cursor; |
| Uint8 *cursor_data; |
| Uint8 *ptr; |
| int i,j,k; |
| int data_byte, mask_byte; |
| |
| /* Check to make sure the cursor size is okay */ |
| if ( (w > 32) || (h > 32) ) { |
| SDL_SetError("Only with width and height <= 32 pixels are allowed"); |
| return(NULL); |
| } |
| |
| /* Allocate the cursor */ |
| cursor = (WMcursor *)SDL_malloc(sizeof(*cursor)); |
| if ( cursor == NULL ) { |
| SDL_SetError("Out of memory"); |
| return(NULL); |
| } |
| |
| /* Note: SDL says width must be a multiple of 8 */ |
| cursor_data = SDL_malloc(w/4 * h); |
| if (cursor_data == NULL) |
| { |
| SDL_free(cursor); |
| SDL_SetError("Out of memory"); |
| return(NULL); |
| } |
| |
| cursor->w = w; |
| cursor->h = h; |
| cursor->hot_x = hot_x; |
| cursor->hot_y = hot_y; |
| cursor->data = cursor_data; |
| |
| |
| /* Data / Mask Resulting pixel on screen |
| 0 / 1 White |
| 1 / 1 Black |
| 0 / 0 Transparent |
| 1 / 0 Inverted color if possible, black if not. |
| */ |
| ptr = cursor_data; |
| |
| for ( i=0; i<h; ++i ) |
| { |
| for (j = 0; j < w/8; ++j) |
| { |
| data_byte = *data; |
| mask_byte = *mask; |
| *ptr++ = 0; /* Sets whole byte transparent */ |
| *ptr = 0; |
| for (k = 0; k < 8; k++) |
| { |
| (*ptr) <<= 2; |
| if (data_byte & 1) *ptr |= 3; /* Black or inverted */ |
| else if(mask_byte & 1) *ptr |= 1; /* White */ |
| if ((k&3) == 3) ptr--; |
| data_byte >>= 1; |
| mask_byte >>= 1; |
| } |
| |
| ptr+=3; |
| data++; |
| mask++; |
| } |
| } |
| |
| return(cursor); |
| } |
| |
| int RISCOS_ShowWMCursor(_THIS, WMcursor *cursor) |
| { |
| current_cursor = cursor; |
| |
| if (cursor == NULL) |
| { |
| _kernel_osbyte(106,0,0); |
| defined_cursor = NULL; |
| } else |
| { |
| WMcursor *old_cursor = defined_cursor; |
| |
| if (cursor != defined_cursor) |
| { |
| Uint8 cursor_def[10]; |
| |
| cursor_def[0] = 0; |
| cursor_def[1] = 2; /* Use shape number 2 */ |
| cursor_def[2] = cursor->w/4; /* Width in bytes */ |
| cursor_def[3] = cursor->h; /* Height (h) in pixels */ |
| cursor_def[4] = cursor->hot_x; /* ActiveX in pixels from left */ |
| cursor_def[5] = cursor->hot_y; /* ActiveY in pixels from top */ |
| cursor_def[6] = ((int)(cursor->data) & 0xFF); /* Least significant byte of pointer to data */ |
| cursor_def[7] = ((int)(cursor->data) >> 8) & 0xFF; /* ... */ |
| cursor_def[8] = ((int)(cursor->data) >> 16) & 0xFF; /* ... */ |
| cursor_def[9] = ((int)(cursor->data) >> 24) & 0xFF; /* Most significant byte of pointer to data */ |
| |
| if (_kernel_osword(21, (int *)cursor_def) != 0) |
| { |
| SDL_SetError("RISCOS couldn't create the cursor to show"); |
| return(0); |
| } |
| defined_cursor = cursor; |
| } |
| |
| if (old_cursor == NULL) |
| { |
| /* First time or reshow in window, so save/setup palette */ |
| if (!cursor_palette_saved) |
| { |
| WIMP_SaveCursorPalette(); |
| } |
| WIMP_SetSDLCursorPalette(); |
| } |
| |
| _kernel_osbyte(106, 2, 0); |
| } |
| |
| return(1); |
| } |
| |
| void FULLSCREEN_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
| { |
| Uint8 move_block[5]; |
| int eig_block[3]; |
| _kernel_swi_regs regs; |
| int os_x, os_y; |
| |
| eig_block[0] = 4; /* X eig factor */ |
| eig_block[1] = 5; /* Y eig factor */ |
| eig_block[2] = -1; /* End of list of variables to request */ |
| |
| regs.r[0] = (int)eig_block; |
| regs.r[1] = (int)eig_block; |
| _kernel_swi(OS_ReadVduVariables, ®s, ®s); |
| |
| os_x = x << eig_block[0]; |
| os_y = y << eig_block[1]; |
| |
| move_block[0] = 3; /* Move cursor */ |
| move_block[1] = os_x & 0xFF; |
| move_block[2] = (os_x >> 8) & 0xFF; |
| move_block[3] = os_y & 0xFF; |
| move_block[4] = (os_y >> 8) & 0xFF; |
| |
| _kernel_osword(21, (int *)move_block); |
| SDL_PrivateMouseMotion(0, 0, x, y); |
| } |
| |
| |
| /* Reshow cursor when mouse re-enters the window */ |
| void WIMP_ReshowCursor(_THIS) |
| { |
| defined_cursor = NULL; |
| cursor_palette_saved = 0; |
| RISCOS_ShowWMCursor(this, current_cursor); |
| } |
| |
| void WIMP_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
| { |
| _kernel_swi_regs regs; |
| int window_state[9]; |
| char block[5]; |
| int osX, osY; |
| |
| window_state[0] = this->hidden->window_handle; |
| regs.r[1] = (unsigned int)window_state; |
| _kernel_swi(Wimp_GetWindowState, ®s, ®s); |
| |
| osX = (x << this->hidden->xeig) + window_state[1]; |
| osY = window_state[4] - (y << this->hidden->yeig); |
| |
| block[0] = 3; |
| block[1] = osX & 0xFF; |
| block[2] = (osX >> 8) & 0xFF; |
| block[3] = osY & 0xFF; |
| block[4] = (osY >> 8) & 0xFF; |
| |
| regs.r[0] = 21; |
| regs.r[1] = (int)block; |
| _kernel_swi(OS_Word, ®s, ®s); |
| SDL_PrivateMouseMotion(0, 0, x, y); |
| } |
| |
| int WIMP_ShowWMCursor(_THIS, WMcursor *cursor) |
| { |
| if (mouseInWindow) return RISCOS_ShowWMCursor(this, cursor); |
| else current_cursor = cursor; |
| |
| return 1; |
| } |
| |
| SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode) |
| { |
| /* In fullscreen mode we don't need to do anything */ |
| if (mode < SDL_GRAB_FULLSCREEN) |
| { |
| _kernel_swi_regs regs; |
| unsigned char block[9]; |
| block[0] = 1; /* Define mouse cursor bounding block */ |
| |
| if ( mode == SDL_GRAB_OFF ) |
| { |
| /* Clip to whole screen */ |
| |
| int r = (this->hidden->screen_width << this->hidden->xeig) - 1; |
| int t = (this->hidden->screen_height << this->hidden->yeig) - 1; |
| |
| block[1] = 0; block[2] = 0; /* Left*/ |
| block[3] = 0; block[4] = 0; /* Bottom */ |
| block[5] = r & 0xFF; block[6] = (r >> 8) & 0xFF; /* Right */ |
| block[7] = t & 0xFF; block[8] = (t >> 8) & 0xFF; /* Top */ |
| } else |
| { |
| /* Clip to window */ |
| unsigned char window_state[36]; |
| |
| *((int *)window_state) = this->hidden->window_handle; |
| regs.r[1] = (unsigned int)window_state; |
| _kernel_swi(Wimp_GetWindowState, ®s, ®s); |
| |
| block[1] = window_state[4]; |
| block[2] = window_state[5]; |
| block[3] = window_state[8]; |
| block[4] = window_state[9]; |
| block[5] = window_state[12]; |
| block[6] = window_state[13]; |
| block[7] = window_state[16]; |
| block[8] = window_state[17]; |
| |
| } |
| |
| regs.r[0] = 21; /* OS word code */ |
| regs.r[1] = (int)block; |
| _kernel_swi(OS_Word, ®s, ®s); |
| } |
| |
| return mode; |
| } |
| |
| /* Save mouse cursor palette to be restore when we are no longer |
| defining a cursor */ |
| |
| void WIMP_SaveCursorPalette() |
| { |
| _kernel_swi_regs regs; |
| int colour; |
| |
| for (colour = 0; colour < 2; colour++) |
| { |
| regs.r[0] = (int)wimp_cursor_palette[colour][0]; |
| regs.r[1] = 25; |
| /* Read settings with OS_ReadPalette */ |
| if (_kernel_swi(0x2f, ®s, ®s) == NULL) |
| { |
| wimp_cursor_palette[colour][2] = (unsigned char)((regs.r[2] >> 8) & 0xFF); |
| wimp_cursor_palette[colour][3] = (unsigned char)((regs.r[2] >> 16) & 0xFF); |
| wimp_cursor_palette[colour][4] = (unsigned char)((regs.r[2] >> 24) & 0xFF); |
| } |
| } |
| |
| cursor_palette_saved = 1; |
| } |
| |
| /* Restore the WIMP's cursor when we leave the SDL window */ |
| void WIMP_RestoreWimpCursor() |
| { |
| int colour; |
| |
| /* Reset to pointer shape 1 */ |
| _kernel_osbyte(106, 1, 0); |
| |
| /* Reset pointer colours */ |
| if (cursor_palette_saved) |
| { |
| for (colour = 0; colour < 2; colour++) |
| { |
| _kernel_osword(12, (int *)wimp_cursor_palette[colour]); |
| } |
| } |
| cursor_palette_saved = 0; |
| } |
| |
| /* Set palette used for SDL mouse cursors */ |
| void WIMP_SetSDLCursorPalette() |
| { |
| /* First time set up the mouse colours */ |
| Uint8 block[5]; |
| |
| /* Set up colour 1 as white */ |
| block[0] = 1; /* Colour to change 1 - 3 */ |
| block[1] = 25; /* Set pointer colour */ |
| block[2] = 255; /* red component*/ |
| block[3] = 255; /* green component */ |
| block[4] = 255; /* blue component*/ |
| _kernel_osword(12, (int *)block); |
| |
| /* Set colour 3 to back */ |
| block[0] = 3; /* Colour to change 1 - 3 */ |
| block[1] = 25; /* Set pointer colour*/ |
| block[2] = 0; /* red component*/ |
| block[3] = 0; /* green component */ |
| block[4] = 0; /* blue component*/ |
| _kernel_osword(12, (int *)block); |
| } |