SDL  2.0
SDL_nullframebuffer.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22 
23 #if SDL_VIDEO_DRIVER_DUMMY
24 
25 #include "../SDL_sysvideo.h"
26 #include "SDL_nullframebuffer_c.h"
27 
28 
29 #define DUMMY_SURFACE "_SDL_DummySurface"
30 
32 {
34  const Uint32 surface_format = SDL_PIXELFORMAT_RGB888;
35  int w, h;
36  int bpp;
37  Uint32 Rmask, Gmask, Bmask, Amask;
38 
39  /* Free the old framebuffer surface */
40  surface = (SDL_Surface *) SDL_GetWindowData(window, DUMMY_SURFACE);
41  SDL_FreeSurface(surface);
42 
43  /* Create a new one */
44  SDL_PixelFormatEnumToMasks(surface_format, &bpp, &Rmask, &Gmask, &Bmask, &Amask);
45  SDL_GetWindowSize(window, &w, &h);
46  surface = SDL_CreateRGBSurface(0, w, h, bpp, Rmask, Gmask, Bmask, Amask);
47  if (!surface) {
48  return -1;
49  }
50 
51  /* Save the info and return! */
52  SDL_SetWindowData(window, DUMMY_SURFACE, surface);
53  *format = surface_format;
54  *pixels = surface->pixels;
55  *pitch = surface->pitch;
56  return 0;
57 }
58 
59 int SDL_DUMMY_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rect * rects, int numrects)
60 {
61  static int frame_number;
63 
64  surface = (SDL_Surface *) SDL_GetWindowData(window, DUMMY_SURFACE);
65  if (!surface) {
66  return SDL_SetError("Couldn't find dummy surface for window");
67  }
68 
69  /* Send the data to the display */
70  if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
71  char file[128];
72  SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",
73  SDL_GetWindowID(window), ++frame_number);
74  SDL_SaveBMP(surface, file);
75  }
76  return 0;
77 }
78 
80 {
82 
83  surface = (SDL_Surface *) SDL_SetWindowData(window, DUMMY_SURFACE, NULL);
84  SDL_FreeSurface(surface);
85 }
86 
87 #endif /* SDL_VIDEO_DRIVER_DUMMY */
88 
89 /* vi: set ts=4 sw=4 expandtab: */
#define SDL_GetWindowData
#define SDL_GetWindowID
GLfloat GLfloat GLfloat GLfloat h
EGLSurface surface
Definition: eglext.h:248
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
#define SDL_SaveBMP(surface, file)
Definition: SDL_surface.h:223
uint32_t Uint32
Definition: SDL_stdinc.h:181
#define SDL_SetWindowData
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: SDL_opengl.h:1572
#define SDL_GetWindowSize
void SDL_DUMMY_DestroyWindowFramebuffer(_THIS, SDL_Window *window)
int SDL_DUMMY_UpdateWindowFramebuffer(_THIS, SDL_Window *window, const SDL_Rect *rects, int numrects)
void * pixels
Definition: SDL_surface.h:75
#define SDL_FreeSurface
#define _THIS
GLubyte GLubyte GLubyte GLubyte w
#define SDL_PixelFormatEnumToMasks
GLint GLint GLsizei GLsizei GLsizei GLint GLenum GLenum const GLvoid * pixels
Definition: SDL_opengl.h:1572
#define SDL_getenv
#define NULL
Definition: begin_code.h:164
#define SDL_SetError
#define SDL_CreateRGBSurface
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
The type used to identify a window.
Definition: SDL_sysvideo.h:73
#define SDL_snprintf
EGLSurface EGLint * rects
Definition: eglext.h:282
int SDL_DUMMY_CreateWindowFramebuffer(_THIS, SDL_Window *window, Uint32 *format, void **pixels, int *pitch)
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64