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SDL_nullframebuffer.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "../SDL_sysvideo.h"
#define DUMMY_SURFACE "_SDL_DummySurface"
int SDL_DUMMY_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch)
{
SDL_Surface *surface;
const Uint32 surface_format = SDL_PIXELFORMAT_RGB888;
int w, h;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
/* Free the old framebuffer surface */
surface = (SDL_Surface *) SDL_GetWindowData(window, DUMMY_SURFACE);
if (surface) {
SDL_FreeSurface(surface);
}
/* Create a new one */
SDL_PixelFormatEnumToMasks(surface_format, &bpp, &Rmask, &Gmask, &Bmask, &Amask);
SDL_GetWindowSize(window, &w, &h);
surface = SDL_CreateRGBSurface(0, w, h, bpp, Rmask, Gmask, Bmask, Amask);
if (!surface) {
return -1;
}
/* Save the info and return! */
SDL_SetWindowData(window, DUMMY_SURFACE, surface);
*format = surface_format;
*pixels = surface->pixels;
*pitch = surface->pitch;
return 0;
}
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int SDL_DUMMY_UpdateWindowFramebuffer(_THIS, SDL_Window * window, SDL_Rect * rects, int numrects)
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{
static int frame_number;
SDL_Surface *surface;
surface = (SDL_Surface *) SDL_GetWindowData(window, DUMMY_SURFACE);
if (!surface) {
SDL_SetError("Couldn't find dummy surface for window");
return -1;
}
/* Send the data to the display */
if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
char file[128];
SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",
SDL_GetWindowID(window), ++frame_number);
SDL_SaveBMP(surface, file);
}
return 0;
}
void SDL_DUMMY_DestroyWindowFramebuffer(_THIS, SDL_Window * window)
{
SDL_Surface *surface;
surface = (SDL_Surface *) SDL_SetWindowData(window, DUMMY_SURFACE, NULL);
if (surface) {
SDL_FreeSurface(surface);
}
}
/* vi: set ts=4 sw=4 expandtab: */