| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../../SDL_internal.h" |
| |
| #if SDL_VIDEO_DRIVER_RISCOS |
| |
| #include "../SDL_sysvideo.h" |
| #include "SDL_riscosframebuffer_c.h" |
| #include "SDL_riscosvideo.h" |
| #include "SDL_riscoswindow.h" |
| |
| #include <kernel.h> |
| #include <swis.h> |
| |
| int RISCOS_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch) |
| { |
| SDL_WindowData *driverdata = (SDL_WindowData *) window->driverdata; |
| const char *sprite_name = "display"; |
| unsigned int sprite_mode; |
| _kernel_oserror *error; |
| _kernel_swi_regs regs; |
| SDL_DisplayMode mode; |
| int size; |
| |
| /* Free the old framebuffer surface */ |
| RISCOS_DestroyWindowFramebuffer(_this, window); |
| |
| /* Create a new one */ |
| SDL_GetCurrentDisplayMode(SDL_GetWindowDisplayIndex(window), &mode); |
| if ((SDL_ISPIXELFORMAT_PACKED(mode.format) || SDL_ISPIXELFORMAT_ARRAY(mode.format))) { |
| *format = mode.format; |
| sprite_mode = (unsigned int)mode.driverdata; |
| } else { |
| *format = SDL_PIXELFORMAT_BGR888; |
| sprite_mode = (1 | (90 << 1) | (90 << 14) | (6 << 27)); |
| } |
| |
| /* Calculate pitch */ |
| *pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3); |
| |
| /* Allocate the sprite area */ |
| size = sizeof(sprite_area) + sizeof(sprite_header) + ((*pitch) * window->h); |
| driverdata->fb_area = SDL_malloc(size); |
| if (!driverdata->fb_area) { |
| return SDL_OutOfMemory(); |
| } |
| |
| driverdata->fb_area->size = size; |
| driverdata->fb_area->count = 0; |
| driverdata->fb_area->start = 16; |
| driverdata->fb_area->end = 16; |
| |
| /* Create the actual image */ |
| regs.r[0] = 256+15; |
| regs.r[1] = (int)driverdata->fb_area; |
| regs.r[2] = (int)sprite_name; |
| regs.r[3] = 0; |
| regs.r[4] = window->w; |
| regs.r[5] = window->h; |
| regs.r[6] = sprite_mode; |
| error = _kernel_swi(OS_SpriteOp, ®s, ®s); |
| if (error != NULL) { |
| SDL_free(driverdata->fb_area); |
| return SDL_SetError("Unable to create sprite: %s (%i)", error->errmess, error->errnum); |
| } |
| |
| driverdata->fb_sprite = (sprite_header *)(((Uint8 *)driverdata->fb_area) + driverdata->fb_area->start); |
| *pixels = ((Uint8 *)driverdata->fb_sprite) + driverdata->fb_sprite->image_offset; |
| |
| return 0; |
| } |
| |
| int RISCOS_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rect * rects, int numrects) |
| { |
| SDL_WindowData *driverdata = (SDL_WindowData *) window->driverdata; |
| _kernel_swi_regs regs; |
| _kernel_oserror *error; |
| |
| regs.r[0] = 512+52; |
| regs.r[1] = (int)driverdata->fb_area; |
| regs.r[2] = (int)driverdata->fb_sprite; |
| regs.r[3] = 0; /* window->x << 1; */ |
| regs.r[4] = 0; /* window->y << 1; */ |
| regs.r[5] = 0x50; |
| regs.r[6] = 0; |
| regs.r[7] = 0; |
| error = _kernel_swi(OS_SpriteOp, ®s, ®s); |
| if (error != NULL) { |
| return SDL_SetError("OS_SpriteOp 52 failed: %s (%i)", error->errmess, error->errnum); |
| } |
| |
| return 0; |
| } |
| |
| void RISCOS_DestroyWindowFramebuffer(_THIS, SDL_Window * window) |
| { |
| SDL_WindowData *driverdata = (SDL_WindowData *) window->driverdata; |
| |
| if (driverdata->fb_area) { |
| SDL_free(driverdata->fb_area); |
| driverdata->fb_area = NULL; |
| } |
| driverdata->fb_sprite = NULL; |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_RISCOS */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |