SDL  2.0
SDL_nullframebuffer.c
Go to the documentation of this file.
1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2020 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);
42 
43  /* Create a new one */
44  SDL_PixelFormatEnumToMasks(surface_format, &bpp, &Rmask, &Gmask, &Bmask, &Amask);
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 
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",
74  SDL_SaveBMP(surface, file);
75  }
76  return 0;
77 }
78 
80 {
82 
83  surface = (SDL_Surface *) SDL_SetWindowData(window, DUMMY_SURFACE, NULL);
85 }
86 
87 #endif /* SDL_VIDEO_DRIVER_DUMMY */
88 
89 /* vi: set ts=4 sw=4 expandtab: */
format
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: SDL_opengl.h:1572
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:203
SDL_DUMMY_CreateWindowFramebuffer
int SDL_DUMMY_CreateWindowFramebuffer(_THIS, SDL_Window *window, Uint32 *format, void **pixels, int *pitch)
SDL_GetWindowData
#define SDL_GetWindowData
Definition: SDL_dynapi_overrides.h:523
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:70
SDL_PIXELFORMAT_RGB888
@ SDL_PIXELFORMAT_RGB888
Definition: SDL_pixels.h:239
NULL
#define NULL
Definition: begin_code.h:167
surface
EGLSurface surface
Definition: eglext.h:248
SDL_GetWindowID
#define SDL_GetWindowID
Definition: SDL_dynapi_overrides.h:516
SDL_nullframebuffer_c.h
h
GLfloat GLfloat GLfloat GLfloat h
Definition: SDL_opengl_glext.h:1949
SDL_Window
The type used to identify a window.
Definition: SDL_sysvideo.h:74
SDL_GetWindowSize
#define SDL_GetWindowSize
Definition: SDL_dynapi_overrides.h:527
SDL_DUMMY_UpdateWindowFramebuffer
int SDL_DUMMY_UpdateWindowFramebuffer(_THIS, SDL_Window *window, const SDL_Rect *rects, int numrects)
window
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
SDL_SetWindowData
#define SDL_SetWindowData
Definition: SDL_dynapi_overrides.h:522
SDL_FreeSurface
#define SDL_FreeSurface
Definition: SDL_dynapi_overrides.h:446
SDL_PixelFormatEnumToMasks
#define SDL_PixelFormatEnumToMasks
Definition: SDL_dynapi_overrides.h:278
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
pixels
GLint GLint GLsizei GLsizei GLsizei GLint GLenum GLenum const GLvoid * pixels
Definition: SDL_opengl.h:1572
bpp
set set set set set set set macro pixldst1 abits if abits op else op endif endm macro pixldst2 abits if abits op else op endif endm macro pixldst4 abits if abits op else op endif endm macro pixldst0 abits op endm macro pixldst3 mem_operand op endm macro pixldst30 mem_operand op endm macro pixldst abits if abits elseif abits elseif abits elseif abits elseif abits pixldst0 abits else pixldst0 abits pixldst0 abits pixldst0 abits pixldst0 abits endif elseif abits else pixldst0 abits pixldst0 abits endif elseif abits else error unsupported bpp
Definition: pixman-arm-neon-asm.h:146
SDL_CreateRGBSurface
#define SDL_CreateRGBSurface
Definition: SDL_dynapi_overrides.h:444
SDL_getenv
#define SDL_getenv
Definition: SDL_dynapi_overrides.h:378
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_snprintf
#define SDL_snprintf
Definition: SDL_dynapi_overrides.h:40
SDL_Rect
A rectangle, with the origin at the upper left (integer).
Definition: SDL_rect.h:77
frame_number
static int frame_number
Definition: testoffscreen.c:30
SDL_SaveBMP
#define SDL_SaveBMP(surface, file)
Definition: SDL_surface.h:224
rects
EGLSurface EGLint * rects
Definition: eglext.h:282
SDL_DUMMY_DestroyWindowFramebuffer
void SDL_DUMMY_DestroyWindowFramebuffer(_THIS, SDL_Window *window)
w
GLubyte GLubyte GLubyte GLubyte w
Definition: SDL_opengl_glext.h:734