zenilib: zenilib/jni/external/sdl/src/video/windows/SDL_windowsframebuffer.c Source File

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SDL_windowsframebuffer.c
Go to the documentation of this file.
1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2013 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_config.h"
22
23 #if SDL_VIDEO_DRIVER_WINDOWS
24
25 #include "SDL_windowsvideo.h"
26
27 int WIN_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch)
28 {
29 SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
30 size_t size;
31 LPBITMAPINFO info;
32 HBITMAP hbm;
33
34 /* Free the old framebuffer surface */
35 if (data->mdc) {
36 DeleteDC(data->mdc);
37 }
38 if (data->hbm) {
39 DeleteObject(data->hbm);
40 }
41
42 /* Find out the format of the screen */
43 size = sizeof(BITMAPINFOHEADER) + 256 * sizeof (RGBQUAD);
44 info = (LPBITMAPINFO)SDL_stack_alloc(Uint8, size);
45
46 SDL_memset(info, 0, size);
47 info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
48
49 /* The second call to GetDIBits() fills in the bitfields */
50 hbm = CreateCompatibleBitmap(data->hdc, 1, 1);
51 GetDIBits(data->hdc, hbm, 0, 0, NULL, info, DIB_RGB_COLORS);
52 GetDIBits(data->hdc, hbm, 0, 0, NULL, info, DIB_RGB_COLORS);
53 DeleteObject(hbm);
54
55 *format = SDL_PIXELFORMAT_UNKNOWN;
56 if (info->bmiHeader.biCompression == BI_BITFIELDS) {
57 int bpp;
58 Uint32 *masks;
59
60 bpp = info->bmiHeader.biPlanes * info->bmiHeader.biBitCount;
61 masks = (Uint32*)((Uint8*)info + info->bmiHeader.biSize);
62 *format = SDL_MasksToPixelFormatEnum(bpp, masks[0], masks[1], masks[2], 0);
63 }
64 if (*format == SDL_PIXELFORMAT_UNKNOWN)
65 {
66 /* We'll use RGB format for now */
67 *format = SDL_PIXELFORMAT_RGB888;
68
69 /* Create a new one */
70 SDL_memset(info, 0, size);
71 info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
72 info->bmiHeader.biPlanes = 1;
73 info->bmiHeader.biBitCount = 32;
74 info->bmiHeader.biCompression = BI_RGB;
75 }
76
77 /* Fill in the size information */
78 *pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3);
79 info->bmiHeader.biWidth = window->w;
80 info->bmiHeader.biHeight = -window->h; /* negative for topdown bitmap */
81 info->bmiHeader.biSizeImage = window->h * (*pitch);
82
83 data->mdc = CreateCompatibleDC(data->hdc);
84 data->hbm = CreateDIBSection(data->hdc, info, DIB_RGB_COLORS, pixels, NULL, 0);
85 SDL_stack_free(info);
86
87 if (!data->hbm) {
88 return WIN_SetError("Unable to create DIB");
89 }
90 SelectObject(data->mdc, data->hbm);
91
92 return 0;
93 }
94
95 int WIN_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rect * rects, int numrects)
96 {
97 SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
98
99 BitBlt(data->hdc, 0, 0, window->w, window->h, data->mdc, 0, 0, SRCCOPY);
100 return 0;
101 }
102
103 void WIN_DestroyWindowFramebuffer(_THIS, SDL_Window * window)
104 {
105 SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
106
107 if (!data) {
108 /* The window wasn't fully initialized */
109 return;
110 }
111
112 if (data->mdc) {
113 DeleteDC(data->mdc);
114 data->mdc = NULL;
115 }
116 if (data->hbm) {
117 DeleteObject(data->hbm);
118 data->hbm = NULL;
119 }
120 }
121
122 #endif /* SDL_VIDEO_DRIVER_WINDOWS */
123
124 /* vi: set ts=4 sw=4 expandtab: */
BI_RGB
#define BI_RGB
Definition: SDL_bmp.c:43
SDL_Window::w
int w
Definition: SDL_sysvideo.h:78
NULL
#define NULL
Definition: ftobjs.h:61
SDL_stack_free
#define SDL_stack_free(data)
Definition: SDL_stdinc.h:227
SDL_WindowData::hbm
HBITMAP hbm
Definition: SDL_windowswindow.h:32
SDL_PIXELFORMAT_UNKNOWN
Definition: SDL_pixels.h:149
SDL_MasksToPixelFormatEnum
DECLSPEC Uint32 SDLCALL SDL_MasksToPixelFormatEnum(int bpp, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
Convert a bpp and RGBA masks to an enumerated pixel format.
Definition: SDL_pixels.c:291
SDL_BYTESPERPIXEL
#define SDL_BYTESPERPIXEL(X)
Definition: SDL_pixels.h:123
SDL_WindowData::hdc
HDC hdc
Definition: SDL_windowswindow.h:30
if
if(!yyg->yy_init)
Definition: glslang_lex.cpp:1037
SDL_config.h
SDL_WindowData
Definition: SDL_androidwindow.h:33
WIN_CreateWindowFramebuffer
int WIN_CreateWindowFramebuffer(_THIS, SDL_Window *window, Uint32 *format, void **pixels, int *pitch)
Uint32
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:145
WIN_DestroyWindowFramebuffer
void WIN_DestroyWindowFramebuffer(_THIS, SDL_Window *window)
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl2ext.h:848
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
SDL_memset
DECLSPEC void *SDLCALL SDL_memset(void *dst, int c, size_t len)
Definition: SDL_string.c:261
format
GLint GLenum GLsizei GLsizei GLsizei GLint GLenum format
Definition: gl2ext.h:845
BI_BITFIELDS
#define BI_BITFIELDS
Definition: SDL_bmp.c:46
SDL_Window::h
int h
Definition: SDL_sysvideo.h:78
SDL_WindowData::mdc
HDC mdc
Definition: SDL_windowswindow.h:31
pixels
GLint GLenum GLsizei GLsizei GLsizei GLint GLenum GLenum const GLvoid * pixels
Definition: gl2ext.h:845
WIN_SetError
int WIN_SetError(const char *prefix)
Uint8
uint8_t Uint8
An unsigned 8-bit integer type.
Definition: SDL_stdinc.h:129
SDL_Window
Definition: SDL_sysvideo.h:71
SDL_stack_alloc
#define SDL_stack_alloc(type, count)
Definition: SDL_stdinc.h:226
SDL_PIXELFORMAT_RGB888
Definition: SDL_pixels.h:212
SDL_Window::driverdata
void * driverdata
Definition: SDL_sysvideo.h:99
SDL_windowsvideo.h
SDL_Rect
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:63
WIN_UpdateWindowFramebuffer
int WIN_UpdateWindowFramebuffer(_THIS, SDL_Window *window, const SDL_Rect *rects, int numrects)
size
GLsizei size
Definition: gl2ext.h:1467