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2ba76dbe80
SDL_Surface has been simplified and internal details are no longer in the public structure. The `format` member of SDL_Surface is now an enumerated pixel format value. You can get the full details of the pixel format by calling `SDL_GetPixelFormatDetails(surface->format)`. You can get the palette associated with the surface by calling SDL_GetSurfacePalette(). You can get the clip rectangle by calling SDL_GetSurfaceClipRect(). SDL_PixelFormat has been renamed SDL_PixelFormatDetails and just describes the pixel format, it does not include a palette for indexed pixel types. SDL_PixelFormatEnum has been renamed SDL_PixelFormat and is used instead of Uint32 for API functions that refer to pixel format by enumerated value. SDL_MapRGB(), SDL_MapRGBA(), SDL_GetRGB(), and SDL_GetRGBA() take an optional palette parameter for indexed color lookups.
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifdef SDL_VIDEO_DRIVER_OFFSCREEN
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#include "../SDL_sysvideo.h"
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#include "../../SDL_properties_c.h"
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#include "SDL_offscreenframebuffer_c.h"
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#define OFFSCREEN_SURFACE "SDL.internal.window.surface"
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int SDL_OFFSCREEN_CreateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *window, SDL_PixelFormat *format, void **pixels, int *pitch)
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{
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SDL_Surface *surface;
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const SDL_PixelFormat surface_format = SDL_PIXELFORMAT_XRGB8888;
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int w, h;
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/* Create a new framebuffer */
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SDL_GetWindowSizeInPixels(window, &w, &h);
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surface = SDL_CreateSurface(w, h, surface_format);
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if (!surface) {
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return -1;
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}
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/* Save the info and return! */
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SDL_SetSurfaceProperty(SDL_GetWindowProperties(window), OFFSCREEN_SURFACE, surface);
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*format = surface_format;
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*pixels = surface->pixels;
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*pitch = surface->pitch;
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return 0;
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}
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int SDL_OFFSCREEN_UpdateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *window, const SDL_Rect *rects, int numrects)
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{
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static int frame_number;
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SDL_Surface *surface;
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surface = (SDL_Surface *)SDL_GetProperty(SDL_GetWindowProperties(window), OFFSCREEN_SURFACE, NULL);
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if (!surface) {
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return SDL_SetError("Couldn't find offscreen surface for window");
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}
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/* Send the data to the display */
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if (SDL_getenv("SDL_VIDEO_OFFSCREEN_SAVE_FRAMES")) {
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char file[128];
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(void)SDL_snprintf(file, sizeof(file), "SDL_window%" SDL_PRIu32 "-%8.8d.bmp",
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SDL_GetWindowID(window), ++frame_number);
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SDL_SaveBMP(surface, file);
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}
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return 0;
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}
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void SDL_OFFSCREEN_DestroyWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *window)
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{
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SDL_ClearProperty(SDL_GetWindowProperties(window), OFFSCREEN_SURFACE);
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}
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#endif /* SDL_VIDEO_DRIVER_OFFSCREEN */
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