Tinyclr - bitmap

General Discussions
1

here is some code to create a bitmap, draw a line and srt two pixels a specific color, we then loop through pixels to find all the colored pixels…well thats what is suppose to happen, any ideas?

Bitmap bitmap = new Bitmap((int)width, (int)height))
Graphics graphics = Graphics.FromImage(bitmap))

graphics.Clear(Color.Black);
graphics.DrawLine(new Pen(new SolidBrush(Color.Blue)), (int)x1, (int)y1, (int)x2, (int)y2);
graphics.Flush();

bitmap.SetPixel((int)x1, (int)y1, Color.Red);
bitmap.SetPixel((int)x2, (int)y2, Color.Green);

for (int y = 0; y < height; y++)
for (int x = 0; x < width; x++)
switch (bitmap.GetPixel(x, y).ToArgb())
{
case -65536: // red
case -16776961: // blue
case -16744448: // green

			// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
			// WE NEVER REACH THIS PART
			// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

			break;
	}
2

were you trying to reply to your last post?

3

i wasn’t getting any responses thought i’d start a fresh conversation

4

What is the question it the problem? What are you trying to do? I didn’t understand, sorry.

5

When setting pixels on the bitmap its not being reflected, the code above creates a bitmap, draws a line then proceeds to locate the colored pixels, but all pixels are black, this is running on a G400D module

6

Your code has more to it than just drawing. Please only draw to the screen and provide the smallest possible example that produces the issue.

7

if you ignore the memory stream block that is the smallest it can be

8

I am not seeing an issue. Can you please provide a complete example? One that shows the issue on a screen. And what board are you testing it on?

9

can you not draw to a bitmap?