1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
#include <platform/platform.h>
#include <windows.h>
struct Win32OffscreenBuffer {
PlatformOffscreenBuffer platform_offscreen_buffer;
BITMAPINFO bitmap_info;
};
struct PlatformWindow {
HWND wnd;
HDC dc;
Win32OffscreenBuffer offscreen_buffer;
};
Win32Window::Win32Window(HWND handle, HDC dc)
{
m_Wnd = handle;
m_Dc = dc;
memset((void*)&m_OffscreenBuffer, 0, sizeof(m_OffscreenBuffer));
}
bool
Win32Window::RecreateOffscreenBuffer(i32 width, i32 height)
{
Sys_Offscreen_Buffer *sys_screen = &m_OffscreenBuffer.sys_offscreen_buffer;
sys_screen->red_shift = 16;
sys_screen->green_shift = 8;
sys_screen->blue_shift = 0;
sys_screen->alpha_shift = 24;
u32 *new_pixels = (u32*)malloc(sizeof(sys_screen->pixels[0]) * width * height);
if (!new_pixels)
{
return false;
}
free(sys_screen->pixels);
sys_screen->width = width;
sys_screen->height = height;
sys_screen->pixels = new_pixels;
BITMAPINFO *bmi = &m_OffscreenBuffer.bitmap_info;
memset(bmi, 0, sizeof(*bmi));
bmi->bmiHeader.biSize = sizeof(bmi->bmiHeader);
bmi->bmiHeader.biWidth = width;
bmi->bmiHeader.biHeight = height;
bmi->bmiHeader.biPlanes = 1;
bmi->bmiHeader.biBitCount = 32;
bmi->bmiHeader.biCompression = BI_RGB;
return true;
}
Sys_Offscreen_Buffer *
Win32Window::GetOffscreenBuffer()
{
Sys_Offscreen_Buffer *screen = &m_OffscreenBuffer.sys_offscreen_buffer;
return screen;
}
void
Win32Window::ShowOffscreenBuffer()
{
i32 width = m_OffscreenBuffer.sys_offscreen_buffer.width;
i32 height = m_OffscreenBuffer.sys_offscreen_buffer.height;
u32 *pixels = m_OffscreenBuffer.sys_offscreen_buffer.pixels;
BITMAPINFO *bmi = &m_OffscreenBuffer.bitmap_info;
StretchDIBits(m_Dc,
0, 0, width, height,
0, 0, width, height,
pixels, bmi, DIB_RGB_COLORS, SRCCOPY);
}
|
