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Better error handling for GenerateTextBadgeIcon()

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GamesTrap 2023-03-07 01:52:15 +01:00
parent aa0e9f8aa7
commit 13f1b96386
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GPG Key ID: 31DFD452434ECDA3
1 changed files with 175 additions and 37 deletions
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212
src/win32_window.c
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@ -1644,20 +1644,88 @@ void _glfwSetWindowTaskbarProgressWin32(_GLFWwindow* window, int progressState,
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR, "Win32: Failed to set taskbar progress state");
}
static HICON GenerateBadgeIcon(HWND hWnd, WCHAR* text)
typedef struct
{
HDC hdc;
HDC hdcMem;
HDC hdcMemMask;
HBITMAP hBitmap;
HBITMAP hBitmapMask;
HBITMAP hOldBitmap;
HBITMAP hOldBitmapMask;
HBRUSH hBackgroundBrush;
HBRUSH hOldBrush;
HFONT hFont;
HFONT hOldFont;
COLORREF hOldColor;
int oldBkMode;
UINT oldTextAlign;
} BadgeData;
static void CleanupBadgeData(HWND hWnd, BadgeData* data)
{
if(!data)
return;
if(data->oldTextAlign != GDI_ERROR)
SetTextAlign(data->hdcMem, data->oldTextAlign);
if(data->oldBkMode)
SetBkMode(data->hdcMem, data->oldBkMode);
if(data->hOldColor != CLR_INVALID)
SetTextColor(data->hdcMem, data->hOldColor);
if(data->hFont)
DeleteObject(data->hFont);
if(data->hOldFont)
SelectObject(data->hdcMem, data->hOldFont);
if (data->hBackgroundBrush)
DeleteObject(data->hBackgroundBrush);
if(data->hOldBrush)
SelectObject(data->hdcMem, data->hOldBrush);
if(data->hOldBitmap)
SelectObject(data->hdcMem, data->hOldBitmap);
if(data->hOldBitmapMask)
SelectObject(data->hdcMem, data->hOldBitmapMask);
if(data->hBitmap)
DeleteObject(data->hBitmap);
if(data->hBitmapMask)
DeleteObject(data->hBitmapMask);
if(data->hdcMem)
DeleteDC(data->hdcMem);
if(data->hdcMemMask)
DeleteDC(data->hdcMemMask);
if(data->hdc)
ReleaseDC(hWnd, data->hdc);
}
static HICON GenerateTextBadgeIcon(HWND hWnd, WCHAR* text)
{
//Credits to GyrosGeier for helping with transparency
HDC hdc = NULL, hdcMem = NULL, hdcMemMask = NULL;
HBITMAP hBitmap = NULL, hBitmapMask = NULL;
ICONINFO iconInfo;
HICON hIcon = NULL;
HFONT hFont = NULL;
BadgeData badgeData;
void* bits = NULL;
DWORD* pixels = NULL;
ICONINFO iconInfo;
int width = 16, height = 16;
int fontSize = 16, weight = FW_REGULAR;
RECT contentRect = { 0, 0, width, height };
HICON hIcon = NULL;
memset(&badgeData, 0, sizeof(BadgeData));
if (!text)
return NULL;
@ -1675,22 +1743,65 @@ static HICON GenerateBadgeIcon(HWND hWnd, WCHAR* text)
}
};
hdc = GetDC(hWnd);
hdcMem = CreateCompatibleDC(hdc);
hdcMemMask = CreateCompatibleDC(hdc);
badgeData.hdc = GetDC(hWnd);
if(!badgeData.hdc)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
hBitmap = CreateDIBSection(hdc, &bmi, DIB_RGB_COLORS, &bits, NULL, 0);
badgeData.hdcMem = CreateCompatibleDC(badgeData.hdc);
if(!badgeData.hdcMem)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
badgeData.hdcMemMask = CreateCompatibleDC(badgeData.hdc);
if(!badgeData.hdcMemMask)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
badgeData.hBitmap = CreateDIBSection(badgeData.hdc, &bmi, DIB_RGB_COLORS, &bits, NULL, 0);
if(!badgeData.hBitmap)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
pixels = (DWORD*)bits;
hBitmapMask = CreateCompatibleBitmap(hdc, width, height);
ReleaseDC(hWnd, hdc);
SelectObject(hdcMem, hBitmap);
SelectObject(hdcMemMask, hBitmapMask);
badgeData.hBitmapMask = CreateCompatibleBitmap(badgeData.hdc, width, height);
if(!badgeData.hBitmapMask)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
BitBlt(hdcMemMask, 0, 0, width, height, hdcMem, 0, 0, SRCCOPY);
badgeData.hOldBitmap = (HBITMAP)SelectObject(badgeData.hdcMem, badgeData.hBitmap);
badgeData.hOldBitmapMask = (HBITMAP)SelectObject(badgeData.hdcMemMask, badgeData.hBitmapMask);
SelectObject(hdcMem, CreateSolidBrush(RGB(0x26, 0x25, 0x2D)));
Ellipse(hdcMem, 0, 0, width + 1, height + 1); //17x17 gives a more fancy ellipse
if(BitBlt(badgeData.hdcMemMask, 0, 0, width, height, badgeData.hdcMem, 0, 0, SRCCOPY) == FALSE)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
badgeData.hBackgroundBrush = CreateSolidBrush(RGB(0x26, 0x25, 0x2D));
if(!badgeData.hBackgroundBrush)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
badgeData.hOldBrush = (HBRUSH)SelectObject(badgeData.hdcMem, badgeData.hBackgroundBrush);
if(Ellipse(badgeData.hdcMem, 0, 0, width + 1, height + 1) == FALSE) //17x17 gives a more fancy ellipse
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
//Adjust font size depending on digits to display
if (lstrlen(text) > 2)
@ -1700,19 +1811,46 @@ static HICON GenerateBadgeIcon(HWND hWnd, WCHAR* text)
}
else if (lstrlen(text) > 1)
fontSize = 14;
//Create and set font
hFont = CreateFont(fontSize, 0, 0, 0, weight, FALSE, FALSE, FALSE, 0,
OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY,
DEFAULT_PITCH | FF_DONTCARE, TEXT("Segeo UI"));
SelectObject(hdcMem, hFont);
badgeData.hFont = CreateFont(fontSize, 0, 0, 0, weight, FALSE, FALSE, FALSE, 0,
OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY,
DEFAULT_PITCH | FF_DONTCARE, TEXT("Segeo UI"));
if(!badgeData.hFont)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
badgeData.hOldFont = (HFONT)SelectObject(badgeData.hdcMem, badgeData.hFont);
//Draw text (center aligned)
SetTextColor(hdcMem, RGB(255, 255, 255)); //Use white text color
SetBkMode(hdcMem, TRANSPARENT); //Make font background transparent
SetTextAlign(hdcMem, TA_LEFT | TA_TOP | TA_NOUPDATECP);
badgeData.hOldColor = SetTextColor(badgeData.hdcMem, RGB(255, 255, 255)); //Use white text color
if(badgeData.hOldColor == CLR_INVALID)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
DrawText(hdcMem, text, lstrlen(text), &contentRect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
badgeData.oldBkMode = SetBkMode(badgeData.hdcMem, TRANSPARENT); //Make font background transparent
if(!badgeData.oldBkMode)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
badgeData.oldTextAlign = SetTextAlign(badgeData.hdcMem, TA_LEFT | TA_TOP | TA_NOUPDATECP);
if(badgeData.oldTextAlign == GDI_ERROR)
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
if(!DrawText(badgeData.hdcMem, text, lstrlen(text), &contentRect, DT_CENTER | DT_VCENTER | DT_SINGLELINE))
{
CleanupBadgeData(hWnd, &badgeData);
return NULL;
}
//Transparency
for (int y = 0; y < height; ++y)
@ -1727,20 +1865,20 @@ static HICON GenerateBadgeIcon(HWND hWnd, WCHAR* text)
}
}
SelectObject(badgeData.hdcMem, badgeData.hOldBitmap);
badgeData.hOldBitmap = NULL;
SelectObject(badgeData.hdcMemMask, badgeData.hOldBitmapMask);
badgeData.hOldBitmapMask = NULL;
//Generate icon from bitmap
iconInfo.fIcon = TRUE;
iconInfo.xHotspot = 0;
iconInfo.yHotspot = 0;
iconInfo.hbmMask = hBitmapMask;
iconInfo.hbmColor = hBitmap;
iconInfo.hbmMask = badgeData.hBitmapMask;
iconInfo.hbmColor = badgeData.hBitmap;
hIcon = CreateIconIndirect(&iconInfo);
//Cleanup
DeleteDC(hdcMemMask);
DeleteDC(hdcMem);
DeleteObject(hBitmap);
DeleteObject(hBitmapMask);
DeleteObject(hFont);
CleanupBadgeData(hWnd, &badgeData);
return hIcon;
}
@ -1751,7 +1889,7 @@ void _glfwSetWindowTaskbarBadgeWin32(_GLFWwindow* window, int count)
HICON icon = NULL;
char countStr[4];
WCHAR* countWStr = NULL;
if (window == NULL)
{
_glfwInputError(GLFW_FEATURE_UNAVAILABLE, "Win32: Taskbar badge requires a valid window handle");
@ -1769,7 +1907,7 @@ void _glfwSetWindowTaskbarBadgeWin32(_GLFWwindow* window, int count)
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR, "Win32: Failed to set taskbar badge count");
return;
}
count = min(count, 999);
if (count > 0)
@ -1784,7 +1922,7 @@ void _glfwSetWindowTaskbarBadgeWin32(_GLFWwindow* window, int count)
return;
}
icon = GenerateBadgeIcon(window->win32.handle, countWStr);
icon = GenerateTextBadgeIcon(window->win32.handle, countWStr);
if (!icon)
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR, "Win32: Failed to set taskbar badge count");