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-rw-r--r--src/video/riscos/SDL_riscosmouse.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/src/video/riscos/SDL_riscosmouse.c b/src/video/riscos/SDL_riscosmouse.c
new file mode 100644
index 0000000..44ce22b
--- /dev/null
+++ b/src/video/riscos/SDL_riscosmouse.c
@@ -0,0 +1,371 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2009 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, &regs, &regs);
+
+ 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, &regs, &regs);
+
+ 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, &regs, &regs);
+ 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, &regs, &regs);
+
+ 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, &regs, &regs);
+ }
+
+ 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, &regs, &regs) == 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);
+}
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