Initial community commit

Src/Plugins/Library/ml_devices/backBuffer.cpp

@@ -0,0 +1,276 @@
+#include "main.h"
+#include "./backBuffer.h"
+
+
+BOOL 
+BackBuffer_Initialize(BackBuffer *self, HWND hwnd)
+{
+	if (NULL == self)
+		return FALSE;
+
+	ZeroMemory(self, sizeof(BackBuffer));
+
+	self->hwnd = hwnd;
+
+	return TRUE;
+}
+
+void 
+BackBuffer_Uninitialize(BackBuffer *self)
+{
+	BackBuffer_Reset(self);
+}
+
+void 
+BackBuffer_Reset(BackBuffer *self)
+{
+	if (NULL == self)
+		return;
+
+	if (NULL != self->hdc)
+	{
+		if (NULL != self->previous)
+			SelectBitmap(self->hdc, self->previous);
+		
+		DeleteDC(self->hdc);
+	}
+	
+	if (NULL != self->bitmap)
+	{
+		DeleteObject(self->bitmap);
+	}
+
+	ZeroMemory(self, sizeof(BackBuffer));
+}
+
+BOOL 
+BackBuffer_EnsureSize(BackBuffer *self, long width, long height)
+{
+	return BackBuffer_EnsureSizeEx(self, width, height, width, height);
+}
+
+BOOL 
+BackBuffer_EnsureSizeEx(BackBuffer *self, long width, long height, long allocWidth, long allocHeight)
+{
+	BOOL result;
+	HDC windowDC;
+	HBITMAP bitmap;
+	long bitmapWidth, bitmapHeight;
+
+	if (NULL == self)
+		return FALSE;
+
+	if (width < 0)
+		width = 0;
+
+	if (height < 0)
+		height = 0;
+	
+	if (NULL != self->bitmap)
+	{
+		BITMAP bitmapInfo;
+		if (sizeof(bitmapInfo) == GetObject(self->bitmap, sizeof(bitmapInfo), &bitmapInfo))
+		{
+			if (bitmapInfo.bmWidth >= width && bitmapInfo.bmHeight >= height)
+				return TRUE;
+
+			bitmapWidth = bitmapInfo.bmWidth;
+			bitmapHeight = bitmapInfo.bmHeight;
+		}
+		else
+		{
+			bitmapWidth = 0;
+			bitmapHeight = 0;
+		}
+	}
+	else
+	{
+		bitmapWidth = 0;
+		bitmapHeight = 0;
+	}
+			
+	result = FALSE;
+	bitmap = NULL;
+
+	windowDC = GetDCEx(self->hwnd, NULL, DCX_CACHE | DCX_NORESETATTRS);
+	if(NULL != windowDC)
+	{
+		if (allocWidth < width)
+			allocWidth = width;
+
+		if (allocWidth < bitmapWidth)
+			allocWidth = bitmapWidth;
+
+		if (allocHeight < height)
+			allocHeight = height;
+		
+		if (allocHeight < bitmapHeight)
+			allocHeight = bitmapHeight;
+
+		bitmap = CreateCompatibleBitmap(windowDC, allocWidth, allocHeight);
+		ReleaseDC(self->hwnd, windowDC);
+	}
+
+	if (NULL != bitmap)
+	{
+		if (NULL != self->hdc)
+			SelectBitmap(self->hdc, bitmap);
+	
+		if (NULL != self->bitmap)
+			DeleteObject(self->bitmap);
+
+		self->bitmap = bitmap;
+		result = TRUE;
+	}
+
+	return result;
+}
+
+HDC 
+BackBuffer_GetDC(BackBuffer *self)
+{
+	if (NULL == self)
+		return FALSE;
+
+	if (NULL == self->hdc)
+	{
+		HDC windowDC;
+		windowDC = GetDCEx(self->hwnd, NULL, DCX_CACHE | DCX_NORESETATTRS);
+		if (NULL != windowDC)
+		{
+			self->hdc = CreateCompatibleDC(windowDC);
+			ReleaseDC(self->hwnd, windowDC);
+			
+			if (NULL != self->hdc)
+			{
+				if (NULL != self->bitmap)
+					self->previous = SelectBitmap(self->hdc, self->bitmap);
+				else
+					self->previous = GetCurrentBitmap(self->hdc);
+			}
+		}
+	}
+
+	return self->hdc;
+}
+
+BOOL
+BackBuffer_Copy(BackBuffer *self, HDC hdc, long x, long y, long width, long height)
+{
+	HDC sourceDC;
+
+	if (NULL == self || NULL == self->bitmap)
+		return FALSE;
+
+	sourceDC = BackBuffer_GetDC(self);
+	if (NULL == sourceDC)
+		return FALSE;
+
+	return BitBlt(hdc, x, y, width, height, sourceDC, 0, 0, SRCCOPY);
+}
+
+BOOL
+BackBuffer_DrawTextEx(BackBuffer *self, HDC hdc, const wchar_t *string, 
+					int length, RECT *rect, unsigned int format,
+					HFONT font, COLORREF backColor, COLORREF textColor, int backMode)
+{
+	BOOL result = FALSE;
+	RECT bufferRect;
+
+	if (NULL == hdc || NULL == rect)
+		return FALSE;
+
+	SetRect(&bufferRect, 0, 0, RECTWIDTH(*rect), RECTHEIGHT(*rect));
+
+	if (NULL != self &&
+		FALSE != BackBuffer_EnsureSize(self, bufferRect.right, bufferRect.bottom))
+	{
+		HDC bufferDC = BackBuffer_GetDC(self);
+		if (NULL != bufferDC)
+		{
+			HFONT prevFont;
+			prevFont = SelectFont(bufferDC, font);
+			SetTextColor(bufferDC, textColor);
+			SetBkColor(bufferDC, backColor);
+			SetBkMode(bufferDC, backMode);
+			
+			if (OPAQUE == backMode)
+				ExtTextOut(bufferDC, 0, 0, ETO_OPAQUE, &bufferRect, NULL, 0, NULL);
+			
+			if (FALSE != DrawText(bufferDC, string, length, &bufferRect, format))
+			{
+				result = BackBuffer_Copy(self, hdc, rect->left, rect->top, 
+								bufferRect.right, bufferRect.bottom);
+			}
+
+			SelectFont(bufferDC, prevFont);
+		}
+	}
+
+	
+	if (FALSE == result)
+	{
+		HFONT prevFont;
+		COLORREF  prevBackColor, prevTextColor;
+		int prevBkMode;
+
+		prevFont = SelectFont(hdc, font);
+		prevTextColor = SetTextColor(hdc, textColor);
+		prevBackColor = SetBkColor(hdc, backColor);
+		prevBkMode= SetBkMode(hdc, backMode);
+
+		result = DrawText(hdc, string, length, rect, format);
+
+		SelectFont(hdc, prevFont);
+		SetTextColor(hdc, prevTextColor);
+		SetBkColor(hdc, prevBackColor);
+		SetBkMode(hdc, prevBkMode);
+	}
+	
+	return result;
+}
+
+BOOL
+BackBuffer_DrawText(BackBuffer *self, HDC hdc, const wchar_t *string, 
+					int length, RECT *rect, unsigned int format)
+{
+	BOOL result = FALSE;
+	RECT bufferRect;
+
+	if (NULL == hdc || NULL == rect)
+		return FALSE;
+
+	SetRect(&bufferRect, 0, 0, RECTWIDTH(*rect), RECTHEIGHT(*rect));
+
+	if (NULL != self &&
+		FALSE != BackBuffer_EnsureSize(self, bufferRect.right, bufferRect.bottom))
+	{
+		HDC bufferDC = BackBuffer_GetDC(self);
+		if (NULL != bufferDC)
+		{
+			HFONT prevFont;
+			int backMode;
+			prevFont = SelectFont(bufferDC, GetCurrentFont(hdc));
+			SetTextColor(bufferDC, GetTextColor(hdc));
+			SetBkColor(bufferDC, GetBkColor(hdc));
+			backMode = GetBkMode(hdc);
+			SetBkMode(bufferDC, backMode);
+			
+			if (OPAQUE == backMode)
+				ExtTextOut(bufferDC, 0, 0, ETO_OPAQUE, &bufferRect, NULL, 0, NULL);
+
+			if (FALSE != DrawText(bufferDC, string, length, &bufferRect, format))
+			{
+				result = BackBuffer_Copy(self, hdc, rect->left, rect->top, 
+								bufferRect.right, bufferRect.bottom);
+			}
+
+			SelectFont(bufferDC, prevFont);
+		}
+	}
+
+	if (FALSE == result)
+		result = DrawText(hdc, string, length, rect, format);
+
+	return result;
+}