probably a dumb question but I''ve only used OpenGL to draw polygons and textures. But how do I just write an array of pixels to the screen? The obvious solution would be (from RedBook): "glDrawPixels() - Writes a rectangular array of pixels from data kept in processor memory into the framebuffer at the current raster position specified by glRasterPos*(). " Also: "void glDrawPixels(GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels); Draws a rectangle of pixel data with dimensions width and height. The pixel rectangle is drawn with its lower-left corner at the current raster position. format and type have the same meaning as with glReadPixels(). (For legal values for format and type, see Table 8-1 and Table 8-2.) The array pointed to by pixels contains the pixel data to be drawn. If the current raster position is invalid, nothing is drawn, and the raster position remains invalid" say I set the format to GL_RGB, and the type to GL_UNSIGNED_BYTE that means every pixel will be 3*8 = 24 bits. So the GLvoid *pixels will have to point to an array of structures the size of width * height? I think I answered my own question and should probably just use trial and error. But, thanks in advance.

Sounds like you''ve figured it out.

Billy - BillyB@mrsnj.com
(Hey, I''''m no longer anonymous!)

GL_RGB = (8 + 8 + 8) = 24 bits.

so array size = (widht * height * 3) bytes.

this function is also affected by....

glPixelRasterPos
glPixelStore
glPixelTransfer
glPixelMap
glPixelZoom

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