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Win32_Repaint(): only redraw the required rectangle

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This commit is contained in:
Thomas Bernard 2019-01-22 10:04:58 +01:00
parent 69640743c9
commit 24b197e6a6
1 changed files with 9 additions and 3 deletions
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12
src/win32screen.c
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@ -53,6 +53,7 @@ HWND GFX2_Get_Window_Handle()
return Win32_hwnd; return Win32_hwnd;
} }
/// Blit our "framebuffer" bitmap to the Window.
static void Win32_Repaint(HWND hwnd) static void Win32_Repaint(HWND hwnd)
{ {
PAINTSTRUCT ps; PAINTSTRUCT ps;
@ -62,17 +63,22 @@ static void Win32_Repaint(HWND hwnd)
RECT rect; RECT rect;
if (!GetUpdateRect(hwnd, &rect, FALSE)) return; if (!GetUpdateRect(hwnd, &rect, FALSE)) return;
//GFX2_Log(GFX2_DEBUG, "Repaint rect : (%d,%d)-(%d,%d)\n", rect.left, rect.top, rect.right, rect.bottom);
dc = BeginPaint(hwnd, &ps); dc = BeginPaint(hwnd, &ps);
dc2 = CreateCompatibleDC(dc); dc2 = CreateCompatibleDC(dc);
old_bmp = (HBITMAP)SelectObject(dc2, Windows_DIB); old_bmp = (HBITMAP)SelectObject(dc2, Windows_DIB);
BitBlt(dc, 0, 0, Windows_DIB_width, Windows_DIB_height, if (!BitBlt(dc, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,
dc2, 0, 0, dc2, rect.left, rect.top,
SRCCOPY); SRCCOPY))
GFX2_Log(GFX2_INFO, "BitBlt(dc, %d, %d, %d, %d, dc2, %d, %d, SRCCOPY) FAILED\n",
rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,
rect.left, rect.top);
SelectObject(dc2, old_bmp); SelectObject(dc2, old_bmp);
DeleteDC(dc2); DeleteDC(dc2);
EndPaint(hwnd, &ps); EndPaint(hwnd, &ps);
} }
/// WindowProc callback function
static LRESULT CALLBACK Win32_WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) static LRESULT CALLBACK Win32_WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{ {
switch(uMsg) switch(uMsg)