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Preserve aspect ratio when scaling window.

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This commit is contained in:
bkaradzic 2012-05-15 22:56:01 -07:00
parent 39610d656e
commit a58537ebd1
2 changed files with 55 additions and 3 deletions
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7
src/bgfx.cpp
View File

@ -631,6 +631,13 @@ namespace bgfx
write(&_value, sizeof(void*) );
}
#if BX_PLATFORM_WINDOWS
LRESULT CALLBACK Context::Window::wndProc(HWND _hwnd, UINT _id, WPARAM _wparam, LPARAM _lparam)
{
return s_ctx.m_window.process(_hwnd, _id, _wparam, _lparam);
}
#endif // BX_PLATFORM_WINDOWS
void Context::init(bool _createRenderThread)
{
BX_TRACE("init");

51
src/bgfx_p.h
View File

@ -56,7 +56,7 @@ extern void dbgPrintfData(const void* _data, uint32_t _size, const char* _format
# include <windows.h>
extern HWND g_bgfxHwnd;
#elif BX_PLATFORM_XBOX360
# include <alloca.h>
# include <malloc.h>
# include <xtl.h>
#endif // BX_PLATFORM_WINDOWS
@ -2478,7 +2478,7 @@ namespace bgfx
}
}
static LRESULT CALLBACK wndProc(HWND _hwnd, UINT _id, WPARAM _wparam, LPARAM _lparam)
LRESULT process(HWND _hwnd, UINT _id, WPARAM _wparam, LPARAM _lparam)
{
switch (_id)
{
@ -2486,6 +2486,46 @@ namespace bgfx
TerminateProcess(GetCurrentProcess(), 0);
break;
case WM_SIZING:
{
RECT& rect = *(RECT*)_lparam;
uint32_t width = rect.right-rect.left;
uint32_t height = rect.bottom-rect.top;
switch (_wparam)
{
case WMSZ_LEFT:
case WMSZ_RIGHT:
{
float aspectRatio = 1.0f/m_aspectRatio;
width = bx::uint32_max(BGFX_DEFAULT_WIDTH/4, width);
height = uint32_t(float(width)*aspectRatio);
}
break;
default:
{
float aspectRatio = m_aspectRatio;
height = bx::uint32_max(BGFX_DEFAULT_HEIGHT/4, height);
width = uint32_t(float(height)*aspectRatio);
}
break;
}
rect.right = rect.left + width;
rect.bottom = rect.top + height;
SetWindowPos(_hwnd
, HWND_TOP
, rect.left
, rect.top
, (rect.right-rect.left)
, (rect.bottom-rect.top)
, SWP_SHOWWINDOW
);
}
return 0;
default:
break;
}
@ -2509,7 +2549,6 @@ namespace bgfx
void adjust(uint32_t _width, uint32_t _height, bool _windowFrame)
{
ShowWindow(g_bgfxHwnd, SW_SHOWNORMAL);
RECT rect;
RECT newrect = {0, 0, (LONG)_width, (LONG)_height};
@ -2563,11 +2602,17 @@ namespace bgfx
ShowWindow(g_bgfxHwnd, SW_RESTORE);
m_aspectRatio = float(_width)/float(_height);
m_frame = _windowFrame;
}
private:
static LRESULT CALLBACK wndProc(HWND _hwnd, UINT _id, WPARAM _wparam, LPARAM _lparam);
RECT m_rect;
DWORD m_style;
float m_aspectRatio;
bool m_frame;
bool m_update;
};