public void Reset(int hPageNum, int vPageNum, int newWidth, int newHeight)
{
this.pageNumFlags = (hPageNum << 8) | vPageNum;
this.ReleaseUnManagedResource();
this.ClearPreviousStoredValues();
var orgHdc = MyWin32.CreateCompatibleDC(IntPtr.Zero);
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(newWidth, newHeight, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
hbmp = bmp.GetHbitmap();
MyWin32.SelectObject(orgHdc, hbmp);
MyWin32.PatBlt(orgHdc, 0, 0, newWidth, newHeight, MyWin32.WHITENESS);
MyWin32.SetBkMode(orgHdc, MyWin32._SetBkMode_TRANSPARENT);
hFont = defaultHFont;
MyWin32.SelectObject(orgHdc, hFont);
currentClipRect = new System.Drawing.Rectangle(0, 0, newWidth, newHeight);
MyWin32.SelectObject(orgHdc, hRgn);
gx = System.Drawing.Graphics.FromHdc(orgHdc);
this.originalHdc = orgHdc;
gx.Clear(System.Drawing.Color.White);
MyWin32.SetRectRgn(hRgn, 0, 0, newWidth, newHeight);
left = hPageNum * newWidth;
top = vPageNum * newHeight;
right = left + newWidth;
bottom = top + newHeight;
#if DEBUG
debug_resetCount++;
#endif
}
void PrepareCharacterMapWhiteOnBlack(char[] buffer)
{
//-----------------------------------------------------------------------
IntPtr gxdc = gx.GetHdc();
int len = buffer.Length;
//draw each character
int curX = 0;
int curY = 0;
//1. clear with white color,
MyWin32.PatBlt(gxdc, 0, 0, width, height, MyWin32.BLACKNESS);
//2. transparent background
MyWin32.SetBkMode(gxdc, MyWin32._SetBkMode_TRANSPARENT);
//3. white brush
//set user font to dc
MyWin32.SelectObject(gxdc, this.hFont);
int rgb = ((255 & 0xFF) << 16 | (255 & 0xFF) << 8 | 255);
MyWin32.SetTextColor(gxdc, rgb);
//TODO:correct white text on black bg for subpixel rendering
//when draw with subpixel rendering
//on white bg -> red come first from left ,end with blue
//on black bg -> blue come first from left, end with red
int fontHeight = fontInfo.FontHeight;
int maxLineHeight = fontHeight;
for (int i = 0; i < len; ++i)
{
//-----------------------------------------------------------------------
//measure string
//and make simple character map
//-----------------------------------------------------------------------
//measure each character ***
//not adjust kerning***
char c = buffer[i];
FontABC abcWidth = fontInfo.GetCharABCWidth(c);
int glyphBoxWidth = Math.Abs(abcWidth.a) + (int)abcWidth.b + abcWidth.c;
if (abcWidth.Sum + curX > this.width)
{
//start newline
curX = 0;
curY += maxLineHeight;
maxLineHeight = fontHeight;
}
NativeTextWin32.TextOut(gxdc, curX, curY, new char[] { c }, 1);
charMap.Add(c, new PixelFarm.Drawing.RectangleF(curX, curY, glyphBoxWidth, fontHeight));
curX += glyphBoxWidth; //move next
}
gx.ReleaseHdc(gxdc);
//myTextBoardBmp = new Bitmap(width, height, new LazyGdiBitmapBufferProvider(this.textBoardBmp));
//myTextBoardBmp.InnerImage = GLBitmapTextureHelper.CreateBitmapTexture(this.textBoardBmp);
}
void PrepareCharacterMapBlackOnWhite(char[] buffer)
{
//-----------------------------------------------------------------------
IntPtr gxdc = gx.GetHdc();
int len = buffer.Length;
//draw each character
int curX = 0;
int curY = 0;
//1. clear with white color,
MyWin32.PatBlt(gxdc, 0, 0, width, height, MyWin32.WHITENESS);
//2. transparent background
MyWin32.SetBkMode(gxdc, MyWin32._SetBkMode_TRANSPARENT);
//set user font to dc
MyWin32.SelectObject(gxdc, this.hFont);
int fontHeight = fontInfo.FontHeight;
int maxLineHeight = fontHeight;
for (int i = 0; i < len; ++i)
{
//-----------------------------------------------------------------------
//measure string
//and make simple character map
//-----------------------------------------------------------------------
//measure each character ***
//not adjust kerning***
char c = buffer[i];
FontABC abcWidth = fontInfo.GetCharABCWidth(c);
int glyphBoxWidth = Math.Abs(abcWidth.a) + (int)abcWidth.b + abcWidth.c;
if (abcWidth.Sum + curX > this.width)
{
//start newline
curX = 0;
curY += maxLineHeight;
maxLineHeight = fontHeight;
}
NativeTextWin32.TextOut(gxdc, curX, curY, new char[] { c }, 1);
charMap.Add(c, new PixelFarm.Drawing.RectangleF(curX, curY, glyphBoxWidth, fontHeight));
curX += glyphBoxWidth; //move next
}
gx.ReleaseHdc(gxdc);
//myTextBoardBmp = new Bitmap(width, height, new LazyGdiBitmapBufferProvider(this.textBoardBmp));
//myTextBoardBmp.InnerImage = GLBitmapTextureHelper.CreateBitmapTexture(this.textBoardBmp);
}
void CreateGraphicsFromNativeHdc(int width, int height)
{
//3. create original dc from memory dc and prepare background
var orgHdc = MyWin32.CreateCompatibleDC(IntPtr.Zero);
bgBmp = new System.Drawing.Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
hbmp = bgBmp.GetHbitmap();
MyWin32.SelectObject(orgHdc, hbmp);
MyWin32.PatBlt(orgHdc, 0, 0, width, height, MyWin32.WHITENESS);
MyWin32.SetBkMode(orgHdc, MyWin32._SetBkMode_TRANSPARENT);
//4. font
hFont = MyWin32.SelectObject(orgHdc, hFont);
//5. region
hRgn = MyWin32.CreateRectRgn(0, 0, width, height);
MyWin32.SelectObject(orgHdc, hRgn);
//6. create graphics from hdc***
gx = System.Drawing.Graphics.FromHdc(orgHdc);
this.originalHdc = orgHdc;
}