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I'm currently using graphicsmill v9.1.3, rendering a few paths using the pipeline api. I use ImageGenerator to create an image that is 4cm x 4cm (944x944 pixels at 600 dpi). Then use the Drawer to draw the shapes and finally output a jpg image to disk. This works well at 600dpi. If i increase it i start getting rendering issues, for example at 1200dpi i get my shapes 4 times, smaller and cut off. I've attached an example image to show whats happening at 600dpi and 1200dpi. Any ideas why this is happening? is it something i've done/not done or is it a bug? We're approaching release in a few months and this is worrying. I can try to make a cut down sample if you need it, just let me know. Thanks  
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Rank: Advanced Member
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Joined: 7/28/2003(UTC)
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Hi Chris,
Could you post a code sample to reproduce the problem? |
Best regards,
Fedor Skvortsov
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Rank: Advanced Member
Groups: Member
Joined: 6/9/2016(UTC)
Posts: 34
Thanks: 22 times
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I've attached the code for completeness but I've realised what the problem was. It was my fault in end. i didn't realise that the graphics transform has the position set for each chunk, so as you see in my code below, i'm overwriting it rather than transforming it. EDIT: I've removed my question as i realised i don't need to do anything other than clone the existing graphics transform, modify it and put it back. Thanks! Code:
public void Run()
{
var dpi = 1200f;
var widthMm = 40;
var heightMm = 40;
var widthPx = UnitConverter.ConvertUnitsToPixels(dpi, widthMm, Unit.Mm);
var heightPx = UnitConverter.ConvertUnitsToPixels(dpi, heightMm, Unit.Mm);
var outputFilename = $@"E:\Temp\Labels\issue-{dpi}dpi.jpg";
using (var generator = CreateImageGenerator(widthPx, heightPx, dpi))
using (var drawer = CreateDrawer(widthPx, heightPx))
using (var writer = ImageWriter.Create(outputFilename))
{
Pipeline.Run(generator + drawer + writer);
}
}
private Drawer CreateDrawer(float width, float height)
{
var drawer = new Drawer();
drawer.Draw += (sender, args) =>
{
var graphics = args.Graphics;
var matrix2 = new System.Drawing.Drawing2D.Matrix();
graphics.Transform = matrix2;
var brush = new SolidBrush(RgbColor.Green);
graphics.FillRectangle(brush, 0, 0, 200, 200);
};
return drawer;
}
private ImageGenerator CreateImageGenerator(int width, int height, float dpi)
{
return new ImageGenerator(width, height, PixelFormat.Format24bppRgb, new RgbColor(255, 255, 255))
{
DpiX = dpi,
DpiY = dpi
};
}
Edited by user Thursday, May 4, 2017 11:48:24 PM(UTC)
| Reason: Not specified
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Rank: Advanced Member
Groups: Member, Administration, Moderator
Joined: 7/28/2003(UTC)
Posts: 1,660
Thanks: 5 times
Was thanked: 76 time(s) in 74 post(s)
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Hi Chris, You discovered a reason of the problem correctly. Even though, if you need to apply a matrix transformation in the Pipeline mode you should just multiple matrices: Code:var transform = CreateTransform();
transform.Multiply(graphics.Transform, MatrixOrder.Append);
Code:using Aurigma.GraphicsMill;
using Aurigma.GraphicsMill.AdvancedDrawing;
using Aurigma.GraphicsMill.Codecs;
using System;
using System.Drawing.Drawing2D;
class Forum_15147
{
private static float dpi = 1200f;
private static float widthMm = 40f;
private static float heightMm = 40f;
private static int widthPx;
private static int heightPx;
static void Main(string[] args)
{
widthPx = UnitConverter.ConvertUnitsToPixels(dpi, widthMm, Unit.Mm);
heightPx = UnitConverter.ConvertUnitsToPixels(dpi, heightMm, Unit.Mm);
RunBitmap();
RunPipeline();
}
public static void RunBitmap()
{
var outputFilename = $@"../../../bitmap-{dpi}dpi.jpg";
using (var bitmap = new Bitmap(widthPx, heightPx, PixelFormat.Format24bppRgb, new RgbColor(255, 255, 255)))
{
bitmap.DpiX = dpi;
bitmap.DpiY = dpi;
var graphics = bitmap.GetAdvancedGraphics();
graphics.Transform = CreateTransform();
DrawGraphics(graphics);
bitmap.Save(outputFilename);
}
}
public static void RunPipeline()
{
var outputFilename = $@"../../../pipilene-{dpi}dpi.jpg";
using (var generator = new ImageGenerator(widthPx, heightPx, PixelFormat.Format24bppRgb, new RgbColor(255, 255, 255)))
using (var drawer = new Drawer())
using (var writer = ImageWriter.Create(outputFilename))
{
generator.DpiX = dpi;
generator.DpiY = dpi;
drawer.Draw += (sender, args) =>
{
var graphics = args.Graphics;
var transform = CreateTransform();
transform.Multiply(graphics.Transform, MatrixOrder.Append);
graphics.Transform = transform;
DrawGraphics(graphics);
};
Pipeline.Run(generator + drawer + writer);
}
}
public static void DrawGraphics(Graphics graphics)
{
var brush = new SolidBrush(RgbColor.Green);
graphics.FillRectangle(brush, 0, 0, 700, 700);
}
public static System.Drawing.Drawing2D.Matrix CreateTransform()
{
var transform = new System.Drawing.Drawing2D.Matrix();
transform.Translate(400f, 100f);
transform.Rotate(15f);
return transform;
}
}
Pipeline (incorrect): Pipeline (correct): Bitmap (correct): Edited by user Saturday, May 6, 2017 2:23:07 AM(UTC)
| Reason: Not specified |
Best regards,
Fedor Skvortsov
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 1 user thanked Fedor for this useful post.
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