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This tutorial is based on Text and images Copyright © 2002 Seth Burgess. The original tutorial can be found in the Internet [TUT01].
5. How to Draw Straight Lines
- Preface
- I. Getting Started
- 1. Introduction
- 2. Fire up GIMP
- 3. First Steps with GIMP
- 4. What to do if you are stuck
- 1. There is a floating selection
- 2. Common Causes of GIMP Non-Responsiveness
- 2.2. The selection is hidden
- 2.3. You are acting outside the selection
- 2.4. The active drawable is not visible
- 2.5. The active drawable is transparent
- 2.6. You are trying to act outside the layer
- 2.7. You are trying to act on a layer group
- 2.8. The image is in indexed color mode.
- 2.9. No visible effect when trying to use a brush, eraser or other tool
- 2.10. No visible effect when trying to use the move tool, rotate or other transform tool
- 2.11. Eraser and brushes no longer work
- 2.12. Eraser does not make area transparent
- 2.13. Unexpected colors when trying to use a brush or eraser
- 2.14. The crop tool leaves an empty area after cropping
- 2.15. I’ve been waiting for a long time and GIMP is not responding
- 2.16. General guidelines on what to check if you are stuck
- 3. How to fix missing windows and dialogs
- 3.2. Tool options dialog is missing
- 3.3. Some of the tool icons are missing
- 3.4. The area showing the opened images at the top is missing
- 4. How to fix problems exporting images
- 4.2. I am exporting to a gif image and the colors changed
- II. How do I Become a GIMP Wizard?
- 5. Getting Images into GIMP
- 6. Getting Images out of GIMP
- 7. Painting with GIMP
- 2. Creating and Using Selections
- 2.2. Adding or subtracting selections
- 3. The QuickMask
- 3.2. Properties
- 4. Using QuickMask Mode
- 5. Paths
- 5.2. Path Properties
- 5.3. Paths and Selections
- 5.4. Transforming Paths
- 5.5. Stroking a Path
- 5.6. Paths and Text
- 5.7. Paths and SVG files
- 6. Brushes
- 7. Adding New Brushes
- 8. The GIH Dialog Box
- 9. Changing brush size
- 9.2. Creating a brush quickly
- 10. Gradients
- 11. Patterns
- 12. Palettes
- 13. Presets
- 14. Drawing Simple Objects
- 14.2. Creating a Basic Shape
- 8. Combining Images
- 9. Text Management
- 10. Enhancing Photographs
- 11. Color Management with GIMP
- 12. Enrich my GIMP
- 13. Scripting
- 2. Using Script-Fu Scripts
- 2.2. Installing Script-Fu scripts
- 2.3. Do’s and Don’ts
- 2.4. Different Kinds Of Script-Fus
- 3. A Script-Fu Tutorial
- 3.2. Variables And Functions
- 3.3. Lists, Lists And More Lists
- 3.4. Your First Script-Fu Script
- 3.5. Giving Our Script Some Guts
- 3.6. Extending The Text Box Script
- 3.7. Your script and its working
- III. Function Reference
- 14. Tools
- 2. Selection Tools
- 2.2. Rectangle Selection
- 2.3. Ellipse Selection
- 2.4. Free Selection (Lasso)
- 2.5. Fuzzy selection (Magic wand)
- 2.6. Select By Color
- 2.7. Intelligent Scissors
- 2.8. Foreground Select
- 3. Paint Tools
- 3.2. Dynamics
- 3.3. Brush Tools (Pencil, Paintbrush, Airbrush)
- 3.4. Bucket Fill
- 3.5. Gradient
- 3.6. Pencil
- 3.7. Paintbrush
- 3.8. MyPaint Brush
- 3.9. Eraser
- 3.10. Airbrush
- 3.11. Ink
- 3.12. Clone
- 3.13. Heal
- 3.14. Perspective Clone
- 3.15. Blur/Sharpen
- 3.16. Smudge
- 3.17. Dodge/Burn
- 4. Transform Tools
- 4.2. Align
- 4.3. Move
- 4.4. Crop
- 4.5. Rotate
- 4.6. Scale
- 4.7. Shear
- 4.8. Perspective
- 4.9. 3D Transform
- 4.10. Unified Transform
- 4.11. Handle Transform
- 4.12. Flip
- 4.13. The Cage Tool
- 4.14. Warp Transform
- 5. Other
- 5.2. Paths
- 5.3. Color Picker
- 5.4. Zoom
- 5.5. Measure
- 5.6. Text
- 5.7. GEGL Operation
- 15. Dialogs
- 2. Image Structure Related Dialogs
- 2.2. Channels Dialog
- 2.3. Paths Dialog
- 2.4. Colormap Dialog
- 2.5. Histogram dialog
- 2.6. Navigation Dialog
- 2.7. Undo History Dialog
- 3. Image-content Related Dialogs
- 3.2. Brushes Dialog
- 3.3. MyPaint Brushes Dialog
- 3.4. Patterns Dialog
- 3.5. Gradients Dialog
- 3.6. Palettes Dialog
- 3.7. Tagging
- 3.8. Fonts Dialog
- 4. Image Management Related Dialogs
- 4.2. Images Dialog
- 4.3. Document History Dialog
- 4.4. Templates Dialog
- 5. Miscellaneous Dialogs
- 5.2. Tool Preset Editor
- 5.3. Device Status Dialog
- 5.4. Error Console
- 5.5. Dashboard
- 5.6. Save File
- 5.7. Export File
- 5.8. Sample Points Dialog
- 5.9. Pointer Dialog
- 5.10. Symmetry Painting dialog
- 5.11. Keyboard Shortcuts Dialog
- 16. Menus
- 2. The “File” Menu
- 2.2. New…
- 2.3. Create
- 2.4. File Open…
- 2.5. Open as Layers…
- 2.6. Open Location…
- 2.7. Open Recent
- 2.8. Save
- 2.9. Save as…
- 2.10. Save a Copy…
- 2.11. Revert
- 2.12. Export… and Overwrite…
- 2.13. Export As…
- 2.14. Create Template…
- 2.15. Print
- 2.16. Send by Email
- 2.17. Copy Image Location
- 2.18. Show in File Manager
- 2.19. Close
- 2.20. Close all
- 2.21. Quit
- 3. The “Edit” Menu
- 3.2. Undo
- 3.3. Redo
- 3.4. Undo History
- 3.5. Cut
- 3.6. Copy
- 3.7. Copy Visible
- 3.8. Paste
- 3.9. Paste Into Selection
- 3.10. Paste In Place
- 3.11. Paste Into Selection In Place
- 3.12. Paste as
- 3.13. Buffer
- 3.14. Clear
- 3.15. Fill with FG Color
- 3.16. Fill with BG Color
- 3.17. Fill with Pattern
- 3.18. Fill Selection Outline
- 3.19. Fill Path
- 3.20. Stroke Selection
- 3.21. Stroke Path
- 3.22. Preferences
- 3.23. Input Devices
- 3.24. Keyboard Shortcuts
- 3.25. Modules
- 3.26. Units
- 4. The “Select” Menu
- 4.2. Select All
- 4.3. None
- 4.4. Invert
- 4.5. Float
- 4.6. By Color
- 4.7. From Path
- 4.8. Selection Editor
- 4.9. Feather
- 4.10. Sharpen
- 4.11. Shrink
- 4.12. Grow
- 4.13. Border
- 4.14. Remove Holes
- 4.15. Distort
- 4.16. Rounded Rectangle
- 4.17. Toggle QuickMask
- 4.18. Save to Channel
- 4.19. To Path
- 5. The “View” Menu
- 5.2. New View
- 5.3. Show All
- 5.4. Dot for Dot
- 5.5. Zoom
- 5.6. Flip & Rotate (0°)
- 5.7. Center Image in Window
- 5.8. Shrink Wrap
- 5.9. Full Screen
- 5.10. Navigation Window
- 5.11. Display Filters
- 5.12. Color Management
- 5.13. Show Selection
- 5.14. Show Layer Boundary
- 5.15. Show Canvas Boundary
- 5.16. Show Guides
- 5.17. Show Grid
- 5.18. Show Sample Points
- 5.19. Snap to Guides
- 5.20. Snap to Grid
- 5.21. Snap to Canvas
- 5.22. Snap to Active Path
- 5.23. Padding Color
- 5.24. Show Menubar
- 5.25. Show Rulers
- 5.26. Show Scrollbars
- 5.27. Show Statusbar
- 6. The “Image” Menu
- 6.2. Duplicate
- 6.3. Mode
- 6.4. RGB mode
- 6.5. Grayscale mode
- 6.6. Indexed mode
- 6.7. Precision
- 6.8. Color Management
- 6.9. Enable Color Management
- 6.10. Assign Color Profile
- 6.11. Convert to Color Profile
- 6.12. Discard Color Profile
- 6.13. Save Color Profile to File
- 6.14. Transform
- 6.15. Flip Horizontally; Flip Vertically
- 6.16. Rotation
- 6.17. Canvas Size
- 6.18. Fit Canvas to Layers
- 6.19. Fit Canvas to Selection
- 6.20. Print Size
- 6.21. Scale Image
- 6.22. Crop Image
- 6.23. Slice Using Guides
- 6.24. Zealous Crop
- 6.25. Merge Visible Layers
- 6.26. Flatten Image
- 6.27. Align Visible Layers…
- 6.28. Guides
- 6.29. New Guide
- 6.30. New Guide (by Percent)
- 6.31. New Guides from Selection
- 6.32. Remove all guides
- 6.33. Configure Grid…
- 6.34. Image Properties
- 6.35. Metadata
- 6.36. Metadata Viewer
- 6.37. Metadata Editor
- 7. The “Layer” Menu
- 7.2. New Layer
- 7.3. New From Visible
- 7.4. New Layer Group
- 7.5. Duplicate layer
- 7.6. Anchor layer
- 7.7. Merge Down
- 7.8. Merge Layer Group
- 7.9. Delete Layer
- 7.10. The Text Commands of the Layer Menu
- 7.11. Discard Text Information
- 7.12. “Stack” Submenu
- 7.13. Select Previous Layer
- 7.14. Select Next Layer
- 7.15. Select Top Layer
- 7.16. Select Bottom Layer
- 7.17. Raise Layer
- 7.18. Lower Layer
- 7.19. Layer to Top
- 7.20. Layer to Bottom
- 7.21. The “Reverse Layer Order” command
- 7.22. The “Mask” Submenu
- 7.23. Add Layer Mask
- 7.24. Apply Layer Mask
- 7.25. Delete Layer Mask
- 7.26. Show Layer Mask
- 7.27. Edit Layer Mask
- 7.28. Disable Layer Mask
- 7.29. Mask to Selection
- 7.30. Add Layer Mask to Selection
- 7.31. Subtract Layer Mask from Selection
- 7.32. Intersect Layer Mask with Selection
- 7.33. The “Transparency” Submenu of the “Layer” menu
- 7.34. Add Alpha Channel
- 7.35. Remove Alpha Channel
- 7.36. Color to Alpha
- 7.37. Semi-flatten
- 7.38. Threshold Alpha
- 7.39. Alpha to Selection
- 7.40. Add Alpha channel to Selection
- 7.41. Subtract from Selection
- 7.42. Intersect Alpha channel with Selection
- 7.43. The “Transform” Submenu
- 7.44. Flip Horizontally
- 7.45. Flip Vertically
- 7.46. Rotate 90° clockwise
- 7.47. Rotate 90° counter-clockwise
- 7.48. Rotate 180°
- 7.49. Arbitrary Rotation
- 7.50. Offset
- 7.51. Layer Boundary Size
- 7.52. Layer to Image Size
- 7.53. Scale Layer
- 7.54. Crop Layer
- 8. The “Colors” Menu
- 8.2. Color Balance
- 8.3. Color Temperature
- 8.4. Hue Chroma
- 8.5. Hue-Saturation
- 8.6. Saturation
- 8.7. Exposure
- 8.8. Shadows-Highlights
- 8.9. Brightness-Contrast
- 8.10. Levels
- 8.11. Curves
- 8.12. Invert
- 8.13. Linear Invert
- 8.14. Value Invert
- 8.15. The “Auto” Submenu
- 8.16. Equalize
- 8.17. White Balance
- 8.18. Stretch Contrast
- 8.19. Stretch Contrast HSV
- 8.20. Color Enhance
- 8.21. Color Enhance (legacy)
- 8.22. The “Components” Submenu
- 8.23. Channel Mixer
- 8.24. Extract Component
- 8.25. Mono Mixer
- 8.26. Compose
- 8.27. Decompose
- 8.28. Recompose
- 8.29. The “Desaturate” Submenu
- 8.30. Color to Gray
- 8.31. Desaturate
- 8.32. Mono Mixer
- 8.33. Sepia
- 8.34. The “Map” Submenu
- 8.35. Rearrange Colormap
- 8.36. Set Colormap
- 8.37. Alien Map
- 8.38. Color Exchange
- 8.39. Rotate Colors
- 8.40. Gradient Map
- 8.41. Palette Map
- 8.42. Sample Colorize
- 8.43. The “Tone Mapping” Submenu
- 8.44. Fattal et al. 2002
- 8.45. Mantiuk 2006
- 8.46. Reinhard 2005
- 8.47. Stress
- 8.48. Retinex
- 8.49. The “Info” Submenu
- 8.50. Histogram
- 8.51. Border Average
- 8.52. Colorcube Analysis
- 8.53. Export Histogram
- 8.54. Smooth Palette
- 8.55. Threshold
- 8.56. Colorize
- 8.57. Posterize
- 8.58. Color to Alpha…
- 8.59. Dither
- 8.60. RGB Clip
- 8.61. Hot…
- 9. The “Tools” Menu
- 10. The “Filters” Menu
- 10.2. Repeat Last
- 10.3. Re-show Last
- 10.4. Reset All Filters
- 10.5. The “Python-Fu” Submenu
- 10.6. The “Script-Fu” Submenu
- 11. “Windows” Menu
- 12. The “Help” Menu
- 12.2. Help
- 12.3. Context Help
- 12.4. Tip of the Day
- 12.5. About
- 12.6. Search and Run a Command
- 12.7. Plug-In Browser
- 12.8. The Procedure Browser
- 12.9. Bug Reports and Feature Requests
- 12.10. GIMP online
- 12.11. User Manual
- 17. Filters
- 2. Common Features
- 3. Blur Filters
- 3.2. Focus Blur
- 3.3. Gaussian Blur
- 3.4. Lens Blur
- 3.5. Mean Curvature Blur
- 3.6. Median Blur
- 3.7. Pixelize
- 3.8. Selective Gaussian Blur
- 3.9. Variable Blur
- 3.10. Circular Motion Blur
- 3.11. Linear Motion Blur
- 3.12. Zoom Motion Blur
- 3.13. Tileable Blur
- 4. Enhance Filters
- 4.2. Antialias
- 4.3. Deinterlace
- 4.4. High Pass
- 4.5. Noise Reduction
- 4.6. Red Eye Removal
- 4.7. Symmetric Nearest Neighbor
- 4.8. Sharpen (Unsharp Mask)
- 4.9. Despeckle
- 4.10. Destripe
- 4.11. NL Filter
- 4.12. Wavelet Decompose
- 5. Distort Filters
- 5.2. Apply Lens
- 5.3. Emboss
- 5.4. Engrave
- 5.5. Lens Distortion
- 5.6. Kaleidoscope
- 5.7. Mosaic
- 5.8. Newsprint
- 5.9. Polar Coordinates
- 5.10. Ripple
- 5.11. Shift
- 5.12. Spherize
- 5.13. Value Propagate
- 5.14. Video
- 5.15. Waves
- 5.16. Whirl and Pinch
- 5.17. Wind
- 5.18. Curve Bend
- 5.19. Emboss (legacy)
- 5.20. Page Curl
- 6. Light and Shadow Filters
- 6.2. Bloom
- 6.3. Supernova
- 6.4. Lens Flare
- 6.5. Gradient Flare
- 6.6. Lighting Effects
- 6.7. Sparkle
- 6.8. Drop Shadow
- 6.9. Long Shadow
- 6.10. Vignette
- 6.11. Drop Shadow (legacy)
- 6.12. Perspective
- 6.13. Xach-Effect
- 7. Noise Filters
- 7.2. CIE lch Noise
- 7.3. HSV Noise
- 7.4. Hurl
- 7.5. Pick
- 7.6. RGB Noise
- 7.7. Slur
- 7.8. Spread
- 8. Edge-Detect Filters
- 8.2. Difference of Gaussians
- 8.3. Edge
- 8.4. Laplace
- 8.5. Neon
- 8.6. Sobel
- 8.7. Image Gradient
- 9. Generic Filters
- 9.2. Convolution Matrix
- 9.3. Distance Map
- 9.4. GEGL graph
- 9.5. Normal Map
- 9.6. Dilate
- 9.7. Erode
- 10. Combine Filters
- 10.2. Depth Merge
- 10.3. Filmstrip
- 11. Artistic Filters
- 11.2. Apply Canvas
- 11.3. Cartoon
- 11.4. Cubism
- 11.5. Glass Tile
- 11.6. Oilify
- 11.7. Photocopy
- 11.8. Simple Linear Iterative Clustering (SLIC)
- 11.9. Softglow
- 11.10. Waterpixels
- 11.11. Cartoon (legacy)
- 11.12. Clothify
- 11.13. GIMPressionist
- 11.14. Oilify (legacy)
- 11.15. Predator
- 11.16. Softglow (legacy)
- 11.17. Van Gogh (LIC)
- 11.18. Weave
- 12. Decor Filters
- 12.2. Add Bevel
- 12.3. Add Border
- 12.4. Coffee Stain
- 12.5. Fog
- 12.6. Fuzzy Border
- 12.7. Old Photo
- 12.8. Round Corners
- 12.9. Slide
- 12.10. Stencil Carve
- 12.11. Stencil Chrome
- 13. Map Filters
- 13.2. Bump Map
- 13.3. Displace
- 13.4. Fractal Trace
- 13.5. Illusion
- 13.6. Little Planet
- 13.7. Panorama Projection
- 13.8. Recursive Transform
- 13.9. Paper Tile
- 13.10. Tile Seamless
- 13.11. Fractal Trace (legacy)
- 13.12. Map Object
- 13.13. Tile
- 14. Rendering Filters
- 14.2. Flame
- 14.3. Fractal Explorer
- 14.4. IFS Fractal
- 14.5. Cell Noise
- 14.6. Perlin Noise
- 14.7. Plasma
- 14.8. Simplex Noise
- 14.9. Solid Noise
- 14.10. Difference Clouds
- 14.11. Bayer Matrix
- 14.12. Checkerboard
- 14.13. Diffraction Patterns
- 14.14. Grid
- 14.15. Linear Sinusoid
- 14.16. Maze
- 14.17. Sinus
- 14.18. Spiral
- 14.19. Checkerboard (legacy)
- 14.20. CML Explorer
- 14.21. Grid (legacy)
- 14.22. Jigsaw
- 14.23. Qbist
- 14.24. Spyrogimp
- 14.25. Circuit
- 14.26. Gfig
- 14.27. Lava
- 14.28. Line Nova
- 14.29. Sphere Designer
- 15. Web Filters
- 15.2. ImageMap
- 15.3. Semi-Flatten
- 15.4. Slice
- 16. Animation Filters
- 16.2. Blend
- 16.3. Burn-In
- 16.4. Rippling
- 16.5. Spinning Globe
- 16.6. Waves
- 16.7. Optimize
- 16.8. Playback
- 14. Tools
- I. Keys and Mouse Reference
- Glossary
- Bibliography
- A. GIMP History
- B. Reporting Bugs and Requesting Enhancements
- C. How to Contribute
- D. Tone Mapping and Shadow Recovery Using GIMP’s ‘Colors/Exposure’
- E. GNU Free Documentation License
- F. Eeek! There is Missing Help
- Index
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