SDL  2.0
SDL_mirframebuffer.c
Go to the documentation of this file.
1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2016 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 
22 /*
23  Contributed by Brandon Schaefer, <brandon.schaefer@canonical.com>
24 */
25 
26 #include "../../SDL_internal.h"
27 
28 #if SDL_VIDEO_DRIVER_MIR
29 
30 #include "SDL_mirevents.h"
31 #include "SDL_mirframebuffer.h"
32 #include "SDL_mirwindow.h"
33 
34 #include "SDL_mirdyn.h"
35 
36 static const Uint32 mir_pixel_format_to_sdl_format[] = {
37  SDL_PIXELFORMAT_UNKNOWN, /* mir_pixel_format_invalid */
38  SDL_PIXELFORMAT_ABGR8888, /* mir_pixel_format_abgr_8888 */
39  SDL_PIXELFORMAT_BGR888, /* mir_pixel_format_xbgr_8888 */
40  SDL_PIXELFORMAT_ARGB8888, /* mir_pixel_format_argb_8888 */
41  SDL_PIXELFORMAT_RGB888, /* mir_pixel_format_xrgb_8888 */
42  SDL_PIXELFORMAT_BGR24, /* mir_pixel_format_bgr_888 */
43  SDL_PIXELFORMAT_RGB24, /* mir_pixel_format_rgb_888 */
44  SDL_PIXELFORMAT_RGB565, /* mir_pixel_format_rgb_565 */
45  SDL_PIXELFORMAT_RGBA5551, /* mir_pixel_format_rgba_5551 */
46  SDL_PIXELFORMAT_RGBA4444 /* mir_pixel_format_rgba_4444 */
47 };
48 
49 Uint32
50 MIR_GetSDLPixelFormat(MirPixelFormat format)
51 {
52  return mir_pixel_format_to_sdl_format[format];
53 }
54 
55 int
57  void** pixels, int* pitch)
58 {
59  MIR_Data* mir_data = _this->driverdata;
60 
61  mir_data->software = SDL_TRUE;
62 
63  if (MIR_CreateWindow(_this, window) < 0)
64  return SDL_SetError("Failed to created a mir window.");
65 
66  *format = MIR_GetSDLPixelFormat(mir_data->pixel_format);
67  if (*format == SDL_PIXELFORMAT_UNKNOWN)
68  return SDL_SetError("Unknown pixel format");
69 
70  *pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3);
71 
72  *pixels = SDL_malloc(window->h*(*pitch));
73  if (*pixels == NULL)
74  return SDL_OutOfMemory();
75 
76  return 0;
77 }
78 
79 int
81  const SDL_Rect* rects, int numrects)
82 {
83  MIR_Window* mir_window = window->driverdata;
84 
85  MirGraphicsRegion region;
86  MirBufferStream* bs;
87  int i, j, x, y, w, h, start;
88  int bytes_per_pixel, bytes_per_row, s_stride, d_stride;
89  char* s_dest;
90  char* pixels;
91 
92  bs = MIR_mir_surface_get_buffer_stream(mir_window->surface);
93  MIR_mir_buffer_stream_get_graphics_region(bs, &region);
94 
95  s_dest = region.vaddr;
96  pixels = (char*)window->surface->pixels;
97 
98  s_stride = window->surface->pitch;
99  d_stride = region.stride;
100  bytes_per_pixel = window->surface->format->BytesPerPixel;
101 
102  for (i = 0; i < numrects; i++) {
103  s_dest = region.vaddr;
104  pixels = (char*)window->surface->pixels;
105 
106  x = rects[i].x;
107  y = rects[i].y;
108  w = rects[i].w;
109  h = rects[i].h;
110 
111  if (w <= 0 || h <= 0 || (x + w) <= 0 || (y + h) <= 0)
112  continue;
113 
114  if (x < 0) {
115  x += w;
116  w += rects[i].x;
117  }
118 
119  if (y < 0) {
120  y += h;
121  h += rects[i].y;
122  }
123 
124  if (x + w > window->w)
125  w = window->w - x;
126  if (y + h > window->h)
127  h = window->h - y;
128 
129  start = y * s_stride + x;
130  pixels += start;
131  s_dest += start;
132 
133  bytes_per_row = bytes_per_pixel * w;
134  for (j = 0; j < h; j++) {
135  memcpy(s_dest, pixels, bytes_per_row);
136  pixels += s_stride;
137  s_dest += d_stride;
138  }
139  }
140 
141  MIR_mir_buffer_stream_swap_buffers_sync(bs);
142 
143  return 0;
144 }
145 
146 void
148 {
149 }
150 
151 #endif /* SDL_VIDEO_DRIVER_MIR */
152 
153 /* vi: set ts=4 sw=4 expandtab: */
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: SDL_opengl.h:1565
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:155
int MIR_CreateWindowFramebuffer(_THIS, SDL_Window *sdl_window, Uint32 *format, void **pixels, int *pitch)
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1567
Uint8 BytesPerPixel
Definition: SDL_pixels.h:304
int MIR_CreateWindow(_THIS, SDL_Window *window)
SDL_Window * window
MirPixelFormat pixel_format
Definition: SDL_mirvideo.h:39
#define SDL_BYTESPERPIXEL(X)
Definition: SDL_pixels.h:127
GLuint start
Definition: SDL_opengl.h:1564
GLint GLint GLsizei GLsizei GLsizei GLint GLenum GLenum const GLvoid * pixels
Definition: SDL_opengl.h:1565
static SDL_VideoDevice * _this
Definition: SDL_video.c:114
SDL_bool software
Definition: SDL_mirvideo.h:38
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1567
void * pixels
Definition: SDL_surface.h:75
#define _THIS
int MIR_UpdateWindowFramebuffer(_THIS, SDL_Window *sdl_window, const SDL_Rect *rects, int numrects)
int x
Definition: SDL_rect.h:66
int w
Definition: SDL_rect.h:67
void MIR_DestroyWindowFramebuffer(_THIS, SDL_Window *sdl_window)
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:42
#define NULL
Definition: begin_code.h:143
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_PixelFormat * format
Definition: SDL_surface.h:72
#define SDL_SetError
#define memcpy
Definition: SDL_malloc.c:640
int h
Definition: SDL_rect.h:67
The type used to identify a window.
Definition: SDL_sysvideo.h:71
SDL_Rect rects[MAX_RECTS]
#define SDL_malloc
GLubyte GLubyte GLubyte GLubyte w
void * driverdata
Definition: SDL_sysvideo.h:106
MirSurface * surface
Definition: SDL_mirwindow.h:38
SDL_Surface * surface
Definition: SDL_sysvideo.h:93
int y
Definition: SDL_rect.h:66
GLfloat GLfloat GLfloat GLfloat h
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int int in j)
Definition: SDL_x11sym.h:42