Automated Presentation of directory src/tutorials/custEducation/opengl2/examples/rasterops/

HUB | Up | Download | Pheedbak | Tree | Topic | A-Z | Search | Hot | New

    ~opengl2/examples/raster README

            Copyright 1993, 1995, 1996, Silicon Graphics,  Inc.
            Technical Education Development
            All Rights Reserved.


		 A collection of programs implementing raster 
              positioning and pixel operations within the OpenGL.
   


    blendrgb.c
	Demonstrates how to use the GL_EXT_blend_color extensions
	to blend two images that do not have an alpha channel.

	Up Arrow		- increase blend factor
	Down Arrow		- decrease blend factor
	Escape key		- exit the program


    collage.c:  display one or more image files as a collage.
        Display one or more image files as a collage using glRasterPos2f()
	and glDrawPixels()
		
  	usage:  collage <file.rgb> [<file2.rgb>] ...
  
  	Up to MAX_IMAGES can be read.  collage will randomly
  	display images zoomed randomly in random positions.

	Escape key		- exit the program
  	SPACEBAR		- toggle fixed/random zoom
  

    copyImage.c
        Demonstrates the glCopyPixels() routine.  copyImage copies the 
	pixels under the cursor when LEFTMOUSE is pressed.

  	Escape key		 - exit the program
  	Left Mousebutton, down	 - copy pixels
  	Middle Mousebutton, down - expand viewing area
  	Right Mousebutton, down	 - shrink viewing area


    copyZoom.c:  demonstates the glCopyPixels() and glPixelZoom() routines.

	Escape key                      - exit the program
	Left Mousebutton, down          - copy pixels
	Middle Mousebutton, down        - zoom down
	Right Mousebutton, down         - zoom up



    show.c:  displays an sgi rgb format image file in a window.
        show creates a window displaying any RGB image stored in the SGI 
	.rgb format.  The filename is opened and the image data is read.  
  	The image is then displayed in a window.

	Escape key               - exit the program


    pan.c:  creates a window displaying a subimage of any RGB image 
	stored in the SGI .rgb format.  It opens the file specified on the
	command line and creates a window displaying a subimage taken 
	from the middle of the image.
	 
	The image can be panned by dragging the mouse with the
	Left Mousebutton pressed.

	Left Mousebutton, down   - pan subimage
	Escape key               - exit the program


    windowSnap.c:  write pixel data from the window to an image file.
  	When LEFTMOUSE is pressed and released the window is captured,
  	the pixel data is written into a file, and the program exits.

	Left Mousebutton, up     - get snapshot of window and exit

Source

• .m_rasterops
• .menu
• blendrgb.c
• collage.c
• copyImage.c
• copyZoom.c
• letterF.c
• pan.c
• show.c
• windowSnap.c

Documentation

• README
• index.html

Images

• aztecNM.rgb
• bricks.rgb
• poster.sm.rgb

Reference

• Makefile