diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/video/riscos/SDL_riscosFullScreenVideo.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/video/riscos/SDL_riscosFullScreenVideo.c | 777 |
1 files changed, 0 insertions, 777 deletions
diff --git a/distrib/sdl-1.2.12/src/video/riscos/SDL_riscosFullScreenVideo.c b/distrib/sdl-1.2.12/src/video/riscos/SDL_riscosFullScreenVideo.c deleted file mode 100644 index 3604738..0000000 --- a/distrib/sdl-1.2.12/src/video/riscos/SDL_riscosFullScreenVideo.c +++ /dev/null @@ -1,777 +0,0 @@ -/* - 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 RISC OS full screen display. -*/ - -#include "SDL_video.h" -#include "SDL_mouse.h" -#include "../SDL_sysvideo.h" -#include "../SDL_pixels_c.h" -#include "../../events/SDL_events_c.h" - -#include "SDL_riscostask.h" -#include "SDL_riscosvideo.h" -#include "SDL_riscosevents_c.h" -#include "SDL_riscosmouse_c.h" - -#include "kernel.h" -#include "swis.h" -#include "unixlib/os.h" -#include "unixlib/local.h" - -/* Private structures */ -typedef struct tagScreenModeBlock -{ - int flags; // mode selector flags, bit 0 = 1, bit 1-7 format specifier, 8-31 reserved - int x_pixels; - int y_pixels; - int pixel_depth; // 2^pixel_depth = bpp,i.e. 0 = 1, 1 = 2, 4 = 16, 5 = 32 - int frame_rate; // -1 use first match - int mode_vars[5]; // array of index, value pairs terminated by -1 -} SCREENMODEBLOCK; - - -/* Helper functions */ -void FULLSCREEN_SetDeviceMode(_THIS); -int FULLSCREEN_SetMode(int width, int height, int bpp); -void FULLSCREEN_SetupBanks(_THIS); - -/* SDL video device functions for fullscreen mode */ -static int FULLSCREEN_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors); -static int FULLSCREEN_FlipHWSurface(_THIS, SDL_Surface *surface); -void FULLSCREEN_SetWMCaption(_THIS, const char *title, const char *icon); -extern int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo *info); - -/* UpdateRects variants */ -static void FULLSCREEN_UpdateRects(_THIS, int numrects, SDL_Rect *rects); -static void FULLSCREEN_UpdateRectsMemCpy(_THIS, int numrects, SDL_Rect *rects); -static void FULLSCREEN_UpdateRects8bpp(_THIS, int numrects, SDL_Rect *rects); -static void FULLSCREEN_UpdateRects16bpp(_THIS, int numrects, SDL_Rect *rects); -static void FULLSCREEN_UpdateRects32bpp(_THIS, int numrects, SDL_Rect *rects); -static void FULLSCREEN_UpdateRectsOS(_THIS, int numrects, SDL_Rect *rects); - -/* Local helper functions */ -static int cmpmodes(const void *va, const void *vb); -static int FULLSCREEN_AddMode(_THIS, int bpp, int w, int h); -void FULLSCREEN_SetWriteBank(int bank); -void FULLSCREEN_SetDisplayBank(int bank); -static void FULLSCREEN_DisableEscape(); -static void FULLSCREEN_EnableEscape(); -void FULLSCREEN_BuildModeList(_THIS); - -/* Following variable is set up in riskosTask.c */ -extern int riscos_backbuffer; /* Create a back buffer in system memory for full screen mode */ - -/* Following is used to create a sprite back buffer */ -extern unsigned char *WIMP_CreateBuffer(int width, int height, int bpp); - -/* Fast assembler copy */ -extern void RISCOS_Put32(void *to, int pixels, int pitch, int rows, void *from, int src_skip_bytes); - -SDL_Surface *FULLSCREEN_SetVideoMode(_THIS, SDL_Surface *current, - int width, int height, int bpp, Uint32 flags) -{ - _kernel_swi_regs regs; - Uint32 Rmask = 0; - Uint32 Gmask = 0; - Uint32 Bmask = 0; - int create_back_buffer = riscos_backbuffer; - - switch(bpp) - { - case 8: - flags |= SDL_HWPALETTE; - break; - - case 15: - case 16: - Bmask = 0x00007c00; - Gmask = 0x000003e0; - Rmask = 0x0000001f; - break; - - case 32: - Bmask = 0x00ff0000; - Gmask = 0x0000ff00; - Rmask = 0x000000ff; - break; - - default: - SDL_SetError("Pixel depth not supported"); - return NULL; - break; - } - - if (FULLSCREEN_SetMode(width, height, bpp) == 0) - { - SDL_SetError("Couldn't set requested mode"); - return (NULL); - } - -/* printf("Setting mode %dx%d\n", width, height); */ - - /* Allocate the new pixel format for the screen */ - if ( ! SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, 0) ) { - RISCOS_RestoreWimpMode(); - SDL_SetError("Couldn't allocate new pixel format for requested mode"); - return(NULL); - } - - /* Set up the new mode framebuffer */ - current->w = width; - this->hidden->height = current->h = height; - - regs.r[0] = -1; /* -1 for current screen mode */ - - /* Get screen width in bytes */ - regs.r[1] = 6; // Screen Width in bytes - _kernel_swi(OS_ReadModeVariable, ®s, ®s); - - current->pitch = regs.r[2]; - - if (flags & SDL_DOUBLEBUF) - { - regs.r[0] = 2; /* Screen area */ - _kernel_swi(OS_ReadDynamicArea, ®s, ®s); - - /* Reg 1 has amount of memory currently used for display */ - regs.r[0] = 2; /* Screen area */ - regs.r[1] = (current->pitch * height * 2) - regs.r[1]; - if (_kernel_swi(OS_ChangeDynamicArea, ®s, ®s) != NULL) - { - /* Can't allocate enough screen memory for double buffer */ - flags &= ~SDL_DOUBLEBUF; - } - } - - current->flags = flags | SDL_FULLSCREEN | SDL_HWSURFACE | SDL_PREALLOC; - - - /* Need to set display banks here for double buffering */ - if (flags & SDL_DOUBLEBUF) - { - FULLSCREEN_SetWriteBank(0); - FULLSCREEN_SetDisplayBank(1); - - create_back_buffer = 0; /* Don't need a back buffer for a double buffered display */ - } - - FULLSCREEN_SetupBanks(this); - - if (create_back_buffer) - { - /* If not double buffered we may need to create a memory - ** back buffer to simulate processing on other OSes. - ** This is turned on by setting the enviromental variable - ** SDL$<name>$BackBuffer >= 1 - */ - if (riscos_backbuffer == 3) - this->hidden->bank[0] = WIMP_CreateBuffer(width, height, bpp); - else - this->hidden->bank[0] = SDL_malloc(height * current->pitch); - if (this->hidden->bank[0] == 0) - { - RISCOS_RestoreWimpMode(); - SDL_SetError("Couldnt allocate memory for back buffer"); - return (NULL); - } - /* Surface updated in programs is now a software surface */ - current->flags &= ~SDL_HWSURFACE; - } - - /* Store address of allocated screen bank to be freed later */ - if (this->hidden->alloc_bank) SDL_free(this->hidden->alloc_bank); - if (create_back_buffer) - { - this->hidden->alloc_bank = this->hidden->bank[0]; - if (riscos_backbuffer == 3) - { - this->hidden->bank[0] += 60; /* Start of sprite data */ - if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */ - } - } else - this->hidden->alloc_bank = 0; - - // Clear both banks to black - SDL_memset(this->hidden->bank[0], 0, height * current->pitch); - SDL_memset(this->hidden->bank[1], 0, height * current->pitch); - - this->hidden->current_bank = 0; - current->pixels = this->hidden->bank[0]; - - /* Have to set the screen here, so SetDeviceMode will pick it up */ - this->screen = current; - - /* Reset device functions for the wimp */ - FULLSCREEN_SetDeviceMode(this); - -/* FULLSCREEN_DisableEscape(); */ - - /* We're done */ - return(current); -} - -/* Reset any device functions that have been changed because we have run in WIMP mode */ -void FULLSCREEN_SetDeviceMode(_THIS) -{ - /* Update rects is different if we have a backbuffer */ - - if (riscos_backbuffer && (this->screen->flags & SDL_DOUBLEBUF) == 0) - { - switch(riscos_backbuffer) - { - case 2: /* ARM code full word copy */ - switch(this->screen->format->BytesPerPixel) - { - case 1: /* 8bpp modes */ - this->UpdateRects = FULLSCREEN_UpdateRects8bpp; - break; - case 2: /* 15/16bpp modes */ - this->UpdateRects = FULLSCREEN_UpdateRects16bpp; - break; - case 4: /* 32 bpp modes */ - this->UpdateRects = FULLSCREEN_UpdateRects32bpp; - break; - - default: /* Just default to the memcpy routine */ - this->UpdateRects = FULLSCREEN_UpdateRectsMemCpy; - break; - } - break; - - case 3: /* Use OS sprite plot routine */ - this->UpdateRects = FULLSCREEN_UpdateRectsOS; - break; - - default: /* Old but safe memcpy */ - this->UpdateRects = FULLSCREEN_UpdateRectsMemCpy; - break; - } - } else - this->UpdateRects = FULLSCREEN_UpdateRects; /* Default do nothing implementation */ - - this->SetColors = FULLSCREEN_SetColors; - - this->FlipHWSurface = FULLSCREEN_FlipHWSurface; - - this->SetCaption = FULLSCREEN_SetWMCaption; - this->SetIcon = NULL; - this->IconifyWindow = NULL; - - this->ShowWMCursor = RISCOS_ShowWMCursor; - this->WarpWMCursor = FULLSCREEN_WarpWMCursor; - - this->PumpEvents = FULLSCREEN_PumpEvents; -} - -/* Query for the list of available video modes */ -void FULLSCREEN_BuildModeList(_THIS) -{ - _kernel_swi_regs regs; - char *enumInfo = NULL; - char *enum_ptr; - int *blockInfo; - int j; - int num_modes; - - /* Find out how much space we need */ - regs.r[0] = 2; /* Reason code */ - regs.r[2] = 0; /* Number of modes to skip */ - regs.r[6] = 0; /* pointer to block or 0 for count */ - regs.r[7] = 0; /* Size of block in bytes */ - _kernel_swi(OS_ScreenMode, ®s, ®s); - - num_modes = -regs.r[2]; - - /* Video memory should be in r[5] */ - this->info.video_mem = regs.r[5]/1024; - - enumInfo = (unsigned char *)SDL_malloc(-regs.r[7]); - if (enumInfo == NULL) - { - SDL_OutOfMemory(); - return; - } - /* Read mode information into block */ - regs.r[2] = 0; - regs.r[6] = (int)enumInfo; - regs.r[7] = -regs.r[7]; - _kernel_swi(OS_ScreenMode, ®s, ®s); - - enum_ptr = enumInfo; - - for (j =0; j < num_modes;j++) - { - blockInfo = (int *)enum_ptr; - if ((blockInfo[1] & 255) == 1) /* We understand this format */ - { - switch(blockInfo[4]) - { - case 3: /* 8 bits per pixel */ - FULLSCREEN_AddMode(this, 8, blockInfo[2], blockInfo[3]); - break; - case 4: /* 15 bits per pixel */ - FULLSCREEN_AddMode(this, 15, blockInfo[2], blockInfo[3]); - break; - case 5: /* 32 bits per pixel */ - FULLSCREEN_AddMode(this, 32, blockInfo[2], blockInfo[3]); - break; - } - } - - enum_ptr += blockInfo[0]; - } - - SDL_free(enumInfo); - - /* Sort the mode lists */ - for ( j=0; j<NUM_MODELISTS; ++j ) { - if ( SDL_nummodes[j] > 0 ) { - SDL_qsort(SDL_modelist[j], SDL_nummodes[j], sizeof *SDL_modelist[j], cmpmodes); - } - } -} - -static int FULLSCREEN_FlipHWSurface(_THIS, SDL_Surface *surface) -{ - _kernel_swi_regs regs; - regs.r[0] = 19; - - FULLSCREEN_SetDisplayBank(this->hidden->current_bank); - this->hidden->current_bank ^= 1; - FULLSCREEN_SetWriteBank(this->hidden->current_bank); - surface->pixels = this->hidden->bank[this->hidden->current_bank]; - - /* Wait for Vsync */ - _kernel_swi(OS_Byte, ®s, ®s); - - return(0); -} - -/* Nothing to do if we are writing direct to hardware */ -static void FULLSCREEN_UpdateRects(_THIS, int numrects, SDL_Rect *rects) -{ -} - -/* Safe but slower Memory copy from our allocated back buffer */ -static void FULLSCREEN_UpdateRectsMemCpy(_THIS, int numrects, SDL_Rect *rects) -{ - int j; - char *to, *from; - int pitch = this->screen->pitch; - int row; - int xmult = this->screen->format->BytesPerPixel; - for (j = 0; j < numrects; j++) - { - from = this->hidden->bank[0] + rects->x * xmult + rects->y * pitch; - to = this->hidden->bank[1] + rects->x * xmult + rects->y * pitch; - for (row = 0; row < rects->h; row++) - { - SDL_memcpy(to, from, rects->w * xmult); - from += pitch; - to += pitch; - } - rects++; - } -} - -/* Use optimized assembler memory copy. Deliberately copies extra columns if - necessary to ensure the rectangle is word aligned. */ -static void FULLSCREEN_UpdateRects8bpp(_THIS, int numrects, SDL_Rect *rects) -{ - int j; - char *to, *from; - int pitch = this->screen->pitch; - int width_bytes; - int src_skip_bytes; - - for (j = 0; j < numrects; j++) - { - from = this->hidden->bank[0] + rects->x + rects->y * pitch; - to = this->hidden->bank[1] + rects->x + rects->y * pitch; - width_bytes = rects->w; - if ((int)from & 3) - { - int extra = ((int)from & 3); - from -= extra; - to -= extra; - width_bytes += extra; - } - if (width_bytes & 3) width_bytes += 4 - (width_bytes & 3); - src_skip_bytes = pitch - width_bytes; - - RISCOS_Put32(to, (width_bytes >> 2), pitch, (int)rects->h, from, src_skip_bytes); - rects++; - } -} - -/* Use optimized assembler memory copy. Deliberately copies extra columns if - necessary to ensure the rectangle is word aligned. */ -static void FULLSCREEN_UpdateRects16bpp(_THIS, int numrects, SDL_Rect *rects) -{ - int j; - char *to, *from; - int pitch = this->screen->pitch; - int width_bytes; - int src_skip_bytes; - - for (j = 0; j < numrects; j++) - { - from = this->hidden->bank[0] + (rects->x << 1) + rects->y * pitch; - to = this->hidden->bank[1] + (rects->x << 1) + rects->y * pitch; - width_bytes = (((int)rects->w) << 1); - if ((int)from & 3) - { - from -= 2; - to -= 2; - width_bytes += 2; - } - if (width_bytes & 3) width_bytes += 2; - src_skip_bytes = pitch - width_bytes; - - RISCOS_Put32(to, (width_bytes >> 2), pitch, (int)rects->h, from, src_skip_bytes); - rects++; - } -} - -/* Use optimized assembler memory copy. 32 bpp modes are always word aligned */ -static void FULLSCREEN_UpdateRects32bpp(_THIS, int numrects, SDL_Rect *rects) -{ - int j; - char *to, *from; - int pitch = this->screen->pitch; - int width; - - for (j = 0; j < numrects; j++) - { - from = this->hidden->bank[0] + (rects->x << 2) + rects->y * pitch; - to = this->hidden->bank[1] + (rects->x << 2) + rects->y * pitch; - width = (int)rects->w ; - - RISCOS_Put32(to, width, pitch, (int)rects->h, from, pitch - (width << 2)); - rects++; - } -} - -/* Use operating system sprite plots. Currently this is much slower than the - other variants however accelerated sprite plotting can be seen on the horizon - so this prepares for it. */ -static void FULLSCREEN_UpdateRectsOS(_THIS, int numrects, SDL_Rect *rects) -{ - _kernel_swi_regs regs; - _kernel_oserror *err; - int j; - int y; - - regs.r[0] = 28 + 512; - regs.r[1] = (unsigned int)this->hidden->alloc_bank; - regs.r[2] = (unsigned int)this->hidden->alloc_bank+16; - regs.r[5] = 0; - - for (j = 0; j < numrects; j++) - { - y = this->screen->h - rects->y; /* top of clipping region */ - _kernel_oswrch(24); /* Set graphics clip region */ - _kernel_oswrch((rects->x << this->hidden->xeig) & 0xFF); /* left */ - _kernel_oswrch(((rects->x << this->hidden->xeig) >> 8) & 0xFF); - _kernel_oswrch(((y - rects->h) << this->hidden->yeig) & 0xFF); /* bottom */ - _kernel_oswrch((((y - rects->h) << this->hidden->yeig)>> 8) & 0xFF); - _kernel_oswrch(((rects->x + rects->w - 1) << this->hidden->xeig) & 0xFF); /* right */ - _kernel_oswrch((((rects->x + rects->w - 1)<< this->hidden->xeig) >> 8) & 0xFF); - _kernel_oswrch(((y-1) << this->hidden->yeig) & 0xFF); /* top */ - _kernel_oswrch((((y-1) << this->hidden->yeig) >> 8) & 0xFF); - - regs.r[3] = 0; - regs.r[4] = 0; - - if ((err = _kernel_swi(OS_SpriteOp, ®s, ®s)) != 0) - { - printf("OS_SpriteOp failed \n%s\n",err->errmess); - } - - rects++; - - /* Reset to full screen clipping */ - _kernel_oswrch(24); /* Set graphics clip region */ - _kernel_oswrch(0); /* left */ - _kernel_oswrch(0); - _kernel_oswrch(0); /* bottom */ - _kernel_oswrch(0); - _kernel_oswrch(((this->screen->w-1) << this->hidden->xeig) & 0xFF); /* right */ - _kernel_oswrch((((this->screen->w-1) << this->hidden->xeig) >> 8) & 0xFF); - _kernel_oswrch(((this->screen->h-1) << this->hidden->yeig) & 0xFF); /* top */ - _kernel_oswrch((((this->screen->h-1) << this->hidden->yeig) >> 8) & 0xFF); - } -} - - -int FULLSCREEN_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) -{ - _kernel_swi_regs regs; - int palette[256]; - - regs.r[0] = -1; - regs.r[1] = -1; - regs.r[2] = (int)palette; - regs.r[3] = 1024; - regs.r[4] = 0; - _kernel_swi(ColourTrans_ReadPalette, ®s, ®s); - - while(ncolors--) - { - palette[firstcolor] = ((colors->b) << 24) | ((colors->g) << 16) | ((colors->r) << 8); - firstcolor++; - colors++; - } - - regs.r[0] = -1; - regs.r[1] = -1; - regs.r[2] = (int)palette; - regs.r[3] = 0; - regs.r[4] = 0; - _kernel_swi(ColourTrans_WritePalette, ®s, ®s); - - return(1); -} - - -static int cmpmodes(const void *va, const void *vb) -{ - SDL_Rect *a = *(SDL_Rect **)va; - SDL_Rect *b = *(SDL_Rect **)vb; - if(a->w == b->w) - return b->h - a->h; - else - return b->w - a->w; -} - -static int FULLSCREEN_AddMode(_THIS, int bpp, int w, int h) -{ - SDL_Rect *mode; - int i, index; - int next_mode; - - /* Check to see if we already have this mode */ - if ( bpp < 8 ) { /* Not supported */ - return(0); - } - index = ((bpp+7)/8)-1; - for ( i=0; i<SDL_nummodes[index]; ++i ) { - mode = SDL_modelist[index][i]; - if ( (mode->w == w) && (mode->h == h) ) { - return(0); - } - } - - /* Set up the new video mode rectangle */ - mode = (SDL_Rect *)SDL_malloc(sizeof *mode); - if ( mode == NULL ) { - SDL_OutOfMemory(); - return(-1); - } - mode->x = 0; - mode->y = 0; - mode->w = w; - mode->h = h; - - /* Allocate the new list of modes, and fill in the new mode */ - next_mode = SDL_nummodes[index]; - SDL_modelist[index] = (SDL_Rect **) - SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *)); - if ( SDL_modelist[index] == NULL ) { - SDL_OutOfMemory(); - SDL_nummodes[index] = 0; - SDL_free(mode); - return(-1); - } - SDL_modelist[index][next_mode] = mode; - SDL_modelist[index][next_mode+1] = NULL; - SDL_nummodes[index]++; - - return(0); -} - -void FULLSCREEN_SetWriteBank(int bank) -{ - _kernel_swi_regs regs; - regs.r[0] = 112; - regs.r[1] = bank+1; - _kernel_swi(OS_Byte, ®s, ®s); -} - -void FULLSCREEN_SetDisplayBank(int bank) -{ - _kernel_swi_regs regs; - regs.r[0] = 113; - regs.r[1] = bank+1; - _kernel_swi(OS_Byte, ®s, ®s); -} - - -/** Disable special escape key processing */ -static void FULLSCREEN_DisableEscape() -{ - _kernel_swi_regs regs; - regs.r[0] = 229; - regs.r[1] = 1; - regs.r[2] = 0; - _kernel_swi(OS_Byte, ®s, ®s); - -} - -/** Enable special escape key processing */ -static void FULLSCREEN_EnableEscape() -{ - _kernel_swi_regs regs; - regs.r[0] = 229; - regs.r[1] = 0; - regs.r[2] = 0; - _kernel_swi(OS_Byte, ®s, ®s); - -} - -/** Store caption in case this is called before we create a window */ -void FULLSCREEN_SetWMCaption(_THIS, const char *title, const char *icon) -{ - SDL_strlcpy(this->hidden->title, title, SDL_arraysize(this->hidden->title)); -} - -/* Set screen mode -* -* Returns 1 if mode is set ok, otherwise 0 -*/ - -int FULLSCREEN_SetMode(int width, int height, int bpp) -{ - SCREENMODEBLOCK smb; - _kernel_swi_regs regs; - - smb.flags = 1; - smb.x_pixels = width; - smb.y_pixels = height; - smb.mode_vars[0] = -1; - - switch(bpp) - { - case 8: - smb.pixel_depth = 3; - /* Note: Need to set ModeFlags to 128 and NColour variables to 255 get full 8 bit palette */ - smb.mode_vars[0] = 0; smb.mode_vars[1] = 128; /* Mode flags */ - smb.mode_vars[2] = 3; smb.mode_vars[3] = 255; /* NColour (number of colours -1) */ - smb.mode_vars[4] = -1; /* End of list */ - break; - - case 15: - case 16: - smb.pixel_depth = 4; - break; - - case 32: - smb.pixel_depth = 5; - break; - - default: - SDL_SetError("Pixel depth not supported"); - return 0; - break; - } - - smb.frame_rate = -1; - - regs.r[0] = 0; - regs.r[1] = (int)&smb; - - if (_kernel_swi(OS_ScreenMode, ®s, ®s) != 0) - { - SDL_SetError("Couldn't set requested mode"); - return 0; - } - - /* Turn cursor off*/ - _kernel_oswrch(23);_kernel_oswrch(1);_kernel_oswrch(0); - _kernel_oswrch(0);_kernel_oswrch(0);_kernel_oswrch(0); - _kernel_oswrch(0);_kernel_oswrch(0);_kernel_oswrch(0); - _kernel_oswrch(0);_kernel_oswrch(0); - - return 1; -} - -/* Get Start addresses for the screen banks */ -void FULLSCREEN_SetupBanks(_THIS) -{ - _kernel_swi_regs regs; - int block[5]; - block[0] = 148; /* Write screen start */ - block[1] = 149; /* Display screen start */ - block[2] = 4; /* X eig factor */ - block[3] = 5; /* Y eig factor */ - block[4] = -1; /* End of list of variables to request */ - - regs.r[0] = (int)block; - regs.r[1] = (int)block; - _kernel_swi(OS_ReadVduVariables, ®s, ®s); - - this->hidden->bank[0] = (void *)block[0]; - this->hidden->bank[1] = (void *)block[1]; - this->hidden->xeig = block[2]; - this->hidden->yeig = block[3]; -} - -/* Toggle to full screen mode from the WIMP */ - -int FULLSCREEN_ToggleFromWimp(_THIS) -{ - int width = this->screen->w; - int height = this->screen->h; - int bpp = this->screen->format->BitsPerPixel; - - RISCOS_StoreWimpMode(); - if (FULLSCREEN_SetMode(width, height, bpp)) - { - char *buffer = this->hidden->alloc_bank; /* This is start of sprite data */ - /* Support back buffer mode only */ - if (riscos_backbuffer == 0) riscos_backbuffer = 1; - - FULLSCREEN_SetupBanks(this); - - this->hidden->bank[0] = buffer + 60; /* Start of sprite data */ - if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */ - - this->hidden->current_bank = 0; - this->screen->pixels = this->hidden->bank[0]; - - /* Copy back buffer to screen memory */ - SDL_memcpy(this->hidden->bank[1], this->hidden->bank[0], width * height * this->screen->format->BytesPerPixel); - - FULLSCREEN_SetDeviceMode(this); - return 1; - } else - RISCOS_RestoreWimpMode(); - - return 0; -} |