本文整理汇总了C#中System.Drawing.Bitmap.Lock方法的典型用法代码示例。如果您正苦于以下问题：C# Bitmap.Lock方法的具体用法？C# Bitmap.Lock怎么用？C# Bitmap.Lock使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Drawing.Bitmap的用法示例。
在下文中一共展示了Bitmap.Lock方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: GetTooltip
public static Bitmap GetTooltip(Bitmap source, bool limitSearchArea = true)
{
Func<double, int> h = percent => (int)Math.Round(percent / 100.0 * source.Width);
Func<double, int> v = percent => (int)Math.Round(percent / 100.0 * source.Height);
Func<Color, bool> borderFunc = c => c.R < 10 && c.G < 10 && c.B < 10; // outermost tooltip 1px "black" border
var cur = Cursor.Position;
var projectedTooltipWidth = v(39); // 39% of screen resolution, that's pretty much how it scales
Rectangle searchArea = new Rectangle(Point.Empty, source.Size);
if (limitSearchArea)
{
// limit the area being searched by a rectangle around the mouse cursor to avoid getting incorrect tooltip (when two are visible)
searchArea = Rectangle.FromLTRB(
(int)Math.Max(0, cur.X - projectedTooltipWidth * 1.2), // a little more to the left than the projected tooltip width (sometimes the tooltip is not shown directly next to the cursor)
0,
Math.Min(cur.X + projectedTooltipWidth * 3 / 4, source.Width),
(int)(source.Height * 0.8)
);
}
var searchAreaSize = searchArea.Width * searchArea.Height;
using (var locked = source.Lock())
{
var lines = GetTooltipBlackLines(locked, searchArea, projectedTooltipWidth, v);
if (lines == null || lines.Count == 0)
{
return null; // tooltip not found
}
var first = lines[0];
var last = lines.Last();
// searching for left border
var range = Enumerable.Range(first.P1.X - v(1), v(0.5)).Reverse();
var left = FindVerticalBorder(locked, range, first.P1.Y, v, borderFunc);
range = Enumerable.Range(first.P2.X + v(0.5), v(0.5));
var right = FindVerticalBorder(locked, range, first.P2.Y, v, borderFunc, false);
if (left == null || right == null)
{
return null; // tooltip not found - why here? :/
}
Trace.WriteLine(string.Format("Searched {0:0.00%} of pixels", locked.PixelsRead * 1f / (source.Width * source.Height)));
var borderWidth = first.P1.X - left.P1.X; // distance between first pixel of first black line and the outer black 1px border found just above
var ttRect = Rectangle.FromLTRB(left.P1.X, left.P1.Y, right.P1.X + 1, last.P1.Y + borderWidth);
//g.DrawRectangle(Pens.Lime, ttRect);
return source.Clone(ttRect, source.PixelFormat);
}
}示例2: GetTooltip_LinesV2
public Bitmap GetTooltip_LinesV2(Bitmap source, Rectangle searchArea, Graphics g)
{
Func<double, int> h = percent => (int)Math.Round(percent / 100.0 * source.Width);
Func<double, int> v = percent => (int)Math.Round(percent / 100.0 * source.Height);
Func<Color, bool> borderFunc = c => c.R < 10 && c.G < 10 && c.B < 10; // tooltip 1px border
var searchAreaSize = searchArea.Width * searchArea.Height;
var projectedTooltipWidth = v(39); // 39% of screen resolution
using (var locked = source.Lock())
{
var lines = GetTooltipBlackLines(locked, searchArea, projectedTooltipWidth, v, g);
if (lines == null || lines.Count == 0)
{
return null; // tooltip not found
}
var first = lines[0];
var last = lines.Last();
// searching for left border
var range = Enumerable.Range(first.P1.X - v(1), v(0.5)).Reverse();
var left = FindVerticalBorder(locked, range, first.P1.Y, v, borderFunc);
range = Enumerable.Range(first.P2.X + v(0.5), v(0.5));
var right = FindVerticalBorder(locked, range, first.P2.Y, v, borderFunc, false);
if (left == null || right == null)
{
return null; // tooltip not found - why here? :/
}
var borderWidth = first.P1.X - left.P1.X; // distance between first pixel of first black line and the outer black 1px border found just above
var ttRect = Rectangle.FromLTRB(left.P1.X, left.P1.Y, right.P1.X + 1, last.P1.Y + borderWidth);
g.DrawRectangle(Pens.Lime, ttRect);
Trace.WriteLine(string.Format("Searched {0:0.00%} of pixels", locked.PixelsRead * 1f / (source.Width * source.Height)));
return source.Clone(ttRect, source.PixelFormat);
}
}示例3: GetTextBounding
public static Rectangle GetTextBounding(Bitmap bitmap, Rectangle outerBound, Func<Color, bool> colorFunc)
{
using (var locked = bitmap.Lock())
{
return GetTextBounding(locked, outerBound, colorFunc);
}
}