[Mwinapi-commits] SF.net SVN: mwinapi:[101] trunk/ManagedWinapi/Screenshot.cs
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[Mwinapi-commits] SF.net SVN: mwinapi:[101] trunk/ManagedWinapi/Screenshot.cs
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From: <sch...@us...> - 2011-01-13 21:44:52
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Revision: 101
http://mwinapi.svn.sourceforge.net/mwinapi/?rev=101&view=rev
Author: schierlm
Date: 2011-01-13 21:44:46 +0000 (Thu, 13 Jan 2011)
Log Message:
-----------
speed scrolling screenshots up a bit
Modified Paths:
--------------
trunk/ManagedWinapi/Screenshot.cs
Modified: trunk/ManagedWinapi/Screenshot.cs
===================================================================
--- trunk/ManagedWinapi/Screenshot.cs 2011-01-12 22:47:10 UTC (rev 100)
+++ trunk/ManagedWinapi/Screenshot.cs 2011-01-13 21:44:46 UTC (rev 101)
@@ -268,6 +268,7 @@
Bitmap buffer = screenshot(rect);
int usedHeight = buffer.Height;
buffer = ResizeBitmap(buffer, buffer.Height * 4);
+ bool lastMayBeIncomplete = false;
while (Cursor.Position == mousePoint)
{
scrollCount++;
@@ -282,7 +283,7 @@
}
Application.DoEvents();
Bitmap nextPart = screenshot(rect);
- int scrollHeight = AppendBelow(buffer, usedHeight, nextPart);
+ int scrollHeight = AppendBelow(buffer, usedHeight, nextPart, false);
foreach (int delay in new int[] { 0, 2, 10, 100, 200, 1000 })
{
if (scrollHeight > 0 || Cursor.Position != mousePoint)
@@ -290,12 +291,24 @@
Thread.Sleep(delay);
Application.DoEvents();
nextPart = screenshot(rect);
- scrollHeight = AppendBelow(buffer, usedHeight, nextPart);
+ scrollHeight = AppendBelow(buffer, usedHeight, nextPart, false);
}
if (scrollHeight == -1)
{
+ if (lastMayBeIncomplete)
+ {
+ scrollHeight = AppendBelow(buffer, usedHeight, nextPart, true);
+ }
+ lastMayBeIncomplete = false;
+ }
+ else
+ {
+ lastMayBeIncomplete = true;
+ }
+ if (scrollHeight == -1)
+ {
CropToSimilarRange(centerPoint, ref rect, ref buffer, ref usedHeight, ref nextPart);
- scrollHeight = AppendBelow(buffer, usedHeight, nextPart);
+ scrollHeight = AppendBelow(buffer, usedHeight, nextPart, false);
}
if (scrollHeight <= 0)
break;
@@ -313,9 +326,21 @@
int relX = centerPoint.X - rect.X;
int relY = centerPoint.Y - rect.Y;
+ // copy all pixel values
+ int[,] bufferPixels = new int[rect.Width, rect.Height];
+ int[,] nextPartPixels = new int[rect.Width, rect.Height];
+ for (int x = 0; x < rect.Width; x++)
+ {
+ for (int y = 0; y < rect.Height; y++)
+ {
+ bufferPixels[x, y] = buffer.GetPixel(x, y + offs).ToArgb();
+ nextPartPixels[x, y] = nextPart.GetPixel(x, y).ToArgb();
+ }
+ }
+
// find a different point
int diffX = relX, diffY = relY;
- if (buffer.GetPixel(relX, relY + offs) == nextPart.GetPixel(relX, relY))
+ if (bufferPixels[relX, relY] == nextPartPixels[relX, relY])
{
bool found = false;
int maxDistance = Math.Min(Math.Min(relX, relY), Math.Min(nextPart.Width - relX, nextPart.Height - relY));
@@ -325,28 +350,28 @@
{
int x = relX - i + j;
int y = relY - i;
- if (buffer.GetPixel(x, y + offs) != nextPart.GetPixel(x, y))
+ if (bufferPixels[x, y] != nextPartPixels[x, y])
{
diffX = x; diffY = y; found = true;
break;
}
x = relX + i;
y = relY - i + j;
- if (buffer.GetPixel(x, y + offs) != nextPart.GetPixel(x, y))
+ if (bufferPixels[x, y] != nextPartPixels[x, y])
{
diffX = x; diffY = y; found = true;
break;
}
x = relX + i - j;
y = relY + i;
- if (buffer.GetPixel(x, y + offs) != nextPart.GetPixel(x, y))
+ if (bufferPixels[x, y] != nextPartPixels[x, y])
{
diffX = x; diffY = y; found = true;
break;
}
x = relX - i;
y = relY + i - j;
- if (buffer.GetPixel(x, y + offs) != nextPart.GetPixel(x, y))
+ if (bufferPixels[x, y] != nextPartPixels[x, y])
{
diffX = x; diffY = y; found = true;
break;
@@ -366,13 +391,13 @@
for (int y = 0; y < rect.Height; y++)
{
// look at every pixel that does not match unmoved
- Color pixel = nextPart.GetPixel(x, y);
- if (buffer.GetPixel(x, y + offs) != pixel)
+ int pixel = nextPartPixels[x, y];
+ if (bufferPixels[x, y] != pixel)
{
- int score = 1000 / (Math.Abs(relX - x) + Math.Abs(relY - y)) + 1;
- for (int scrollHeight = 1; scrollHeight < scrollScores.Length; scrollHeight++)
+ int score = 1000 / (Math.Abs(relX - x) + Math.Abs(relY - y)+1 ) + 1;
+ for (int scrollHeight = 1; scrollHeight < Math.Min(scrollScores.Length, rect.Height - y); scrollHeight++)
{
- if (buffer.GetPixel(x, y + offs + scrollHeight) == pixel)
+ if (bufferPixels[x, y + scrollHeight] == pixel)
{
scrollScores[scrollHeight] += score;
}
@@ -384,8 +409,8 @@
// remove scores that do not preserve relX/relY or diffX/diffY
for (int scrollHeight = 1; scrollHeight < scrollScores.Length; scrollHeight++)
{
- if (buffer.GetPixel(relX, relY + offs + scrollHeight) != nextPart.GetPixel(relX, relY)
- || buffer.GetPixel(diffX, diffY + offs + scrollHeight) != nextPart.GetPixel(diffX, diffY))
+ if ((relY + scrollHeight < rect.Height && bufferPixels[relX, relY + scrollHeight] != nextPartPixels[relX, relY])
+ || (diffY + scrollHeight < rect.Height && bufferPixels[diffX, diffY + scrollHeight] != nextPartPixels[diffX, diffY]))
{
scrollScores[scrollHeight] = 0;
}
@@ -417,14 +442,14 @@
scrollScores[scrollHeight] = 0;
// check the maximum rectangle that scrolls and its size
- int minY = 0, maxY = rect.Height - 1;
+ int minY = 0, maxY = rect.Height - 1 - scrollHeight;
// first scan up and down with a width of 7 pixels
for (int y = relY - 1; y >= minY; y--)
{
bool same = true;
for (int x = relX - 3; x <= relX + 3; x++)
{
- if (buffer.GetPixel(x, y + offs + scrollHeight) != nextPart.GetPixel(x, y))
+ if (bufferPixels[x, y + scrollHeight] != nextPartPixels[x, y])
{
same = false;
break;
@@ -440,7 +465,7 @@
bool same = true;
for (int x = relX - 3; x <= relX + 3; x++)
{
- if (buffer.GetPixel(x, y + offs + scrollHeight) != nextPart.GetPixel(x, y))
+ if (bufferPixels[x, y + scrollHeight] != nextPartPixels[x, y])
{
same = false;
break;
@@ -452,14 +477,14 @@
}
}
// now check left and right
- int minX = 0, maxX = rect.Height - 1;
+ int minX = 0, maxX = rect.Width - 1;
for (int x = relX - 1; x >= minX; x--)
{
bool same = true;
for (int y = minY; y <= maxY; y++)
{
- if (buffer.GetPixel(x, y + offs + scrollHeight) != nextPart.GetPixel(x, y))
+ if (bufferPixels[x, y + scrollHeight] != nextPartPixels[x, y])
{
same = false;
break;
@@ -473,7 +498,7 @@
bool same = true;
for (int y = minY; y <= maxY; y++)
{
- if (buffer.GetPixel(x, y + offs + scrollHeight) != nextPart.GetPixel(x, y))
+ if (bufferPixels[x, y + scrollHeight] != nextPartPixels[x, y])
{
same = false;
break;
@@ -519,17 +544,31 @@
return result;
}
- private static int AppendBelow(Bitmap buffer, int usedHeight, Bitmap nextPart)
+ private static int AppendBelow(Bitmap buffer, int usedHeight, Bitmap nextPart, bool ignoreLastPart)
{
int offs = usedHeight - nextPart.Height;
- for (int scrollHeight = 0; scrollHeight < nextPart.Height / 2; scrollHeight++)
+
+ // copy all pixel values
+ int[,] bufferPixels = new int[nextPart.Width, nextPart.Height];
+ int[,] nextPartPixels = new int[nextPart.Width, nextPart.Height];
+ for (int x = 0; x < nextPart.Width; x++)
{
+ for (int y = 0; y < nextPart.Height; y++)
+ {
+ bufferPixels[x, y] = buffer.GetPixel(x, y + offs).ToArgb();
+ nextPartPixels[x, y] = nextPart.GetPixel(x, y).ToArgb();
+ }
+ }
+
+ // find offset and append
+ for (int scrollHeight = 0; scrollHeight < nextPart.Height / (ignoreLastPart ? 4 : 2); scrollHeight++)
+ {
bool same = true;
- for (int y = 0; same && y < nextPart.Height - scrollHeight; y++)
+ for (int y = 0; same && y < nextPart.Height - scrollHeight * (ignoreLastPart ? 2 : 1); y++)
{
for (int x = 0; same && x < nextPart.Width; x++)
{
- if (nextPart.GetPixel(x, y) != buffer.GetPixel(x, y + offs + scrollHeight))
+ if (nextPartPixels[x, y] != bufferPixels[x, y + scrollHeight])
same = false;
}
}
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