OpenGL® SuperBible, Third Edition

Chapter 7. Imaging with OpenGL

by Richard S. Wright, Jr.

WHAT YOU'LL LEARN IN THIS CHAPTER:

How To	Functions You'll Use
Set the raster position	glRasterPos, glWindowPos
Draw bitmaps	glBitmap
Read and write color images	glReadPixels, glDrawPixels
Magnify, shrink, and flip images	glPixelZoom
Set up operations on colors	glPixelTransfer, glPixelMap
Perform color substitutions	glColorTable
Perform advanced image filtering	glConvolutionFilter2D
Collect statistics on images	glHistogram, glGetHistogram

In the preceding chapters, you learned the basics of OpenGL's acclaimed 3D graphics capabilities. Until now, all output has been the result of three-dimensional primitives being transformed and projected to 2D space and finally rasterized into the color buffer. However, OpenGL ...