/* 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$$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 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; iw == 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; }