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 int
MIR_CreateWindowFramebuffer(_THIS,SDL_Window * window,Uint32 * format,void ** pixels,int * pitch)37 MIR_CreateWindowFramebuffer(_THIS, SDL_Window* window, Uint32* format,
38 void** pixels, int* pitch)
39 {
40 MIR_Data* mir_data = _this->driverdata;
41
42 mir_data->software = SDL_TRUE;
43
44 if (MIR_CreateWindow(_this, window) < 0)
45 return SDL_SetError("Failed to created a mir window.");
46
47 *format = MIR_GetSDLPixelFormat(mir_data->pixel_format);
48 if (*format == SDL_PIXELFORMAT_UNKNOWN)
49 return SDL_SetError("Unknown pixel format");
50
51 *pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3);
52
53 *pixels = SDL_malloc(window->h*(*pitch));
54 if (*pixels == NULL)
55 return SDL_OutOfMemory();
56
57 return 0;
58 }
59
60 int
MIR_UpdateWindowFramebuffer(_THIS,SDL_Window * window,const SDL_Rect * rects,int numrects)61 MIR_UpdateWindowFramebuffer(_THIS, SDL_Window* window,
62 const SDL_Rect* rects, int numrects)
63 {
64 MIR_Window* mir_window = window->driverdata;
65
66 MirGraphicsRegion region;
67 MirBufferStream* bs;
68 int i, j, x, y, w, h, start;
69 int bytes_per_pixel, bytes_per_row, s_stride, d_stride;
70 char* s_dest;
71 char* pixels;
72
73 bs = MIR_mir_surface_get_buffer_stream(mir_window->surface);
74 MIR_mir_buffer_stream_get_graphics_region(bs, ®ion);
75
76 s_dest = region.vaddr;
77 pixels = (char*)window->surface->pixels;
78
79 s_stride = window->surface->pitch;
80 d_stride = region.stride;
81 bytes_per_pixel = window->surface->format->BytesPerPixel;
82
83 for (i = 0; i < numrects; i++) {
84 s_dest = region.vaddr;
85 pixels = (char*)window->surface->pixels;
86
87 x = rects[i].x;
88 y = rects[i].y;
89 w = rects[i].w;
90 h = rects[i].h;
91
92 if (w <= 0 || h <= 0 || (x + w) <= 0 || (y + h) <= 0)
93 continue;
94
95 if (x < 0) {
96 x += w;
97 w += rects[i].x;
98 }
99
100 if (y < 0) {
101 y += h;
102 h += rects[i].y;
103 }
104
105 if (x + w > window->w)
106 w = window->w - x;
107 if (y + h > window->h)
108 h = window->h - y;
109
110 start = y * s_stride + x;
111 pixels += start;
112 s_dest += start;
113
114 bytes_per_row = bytes_per_pixel * w;
115 for (j = 0; j < h; j++) {
116 SDL_memcpy(s_dest, pixels, bytes_per_row);
117 pixels += s_stride;
118 s_dest += d_stride;
119 }
120 }
121
122 MIR_mir_buffer_stream_swap_buffers_sync(bs);
123
124 return 0;
125 }
126
127 void
MIR_DestroyWindowFramebuffer(_THIS,SDL_Window * window)128 MIR_DestroyWindowFramebuffer(_THIS, SDL_Window* window)
129 {
130 }
131
132 #endif /* SDL_VIDEO_DRIVER_MIR */
133
134 /* vi: set ts=4 sw=4 expandtab: */
135