HP Workstation zx2000 OpenGL 1.1 Reference for HP-UX 11.x - Page 31

B glBitMap where (xr, yr) is the raster position and (xo, yo) is the bitmap origin. Fragments are then generated for each pixel corresponding to a 1 (one) in the bitmap image. These fragments are generated using the current raster z coordinate, color or color index, and current raster texture coordinates. They are then treated just as if they had been generated by a point, line, or polygon, including texture mapping, fogging, and all per-fragment operations such as alpha and depth testing. After the bitmap has been drawn, the x and y coordinates of the current raster position are offset by xmove and ymove. No change is made to the z coordinate of the current raster position, or to the current raster color, texture coordinates, or index. Notes To set a valid raster position outside the viewport, first set a valid raster position inside the viewport, then call glBitmap with NULL as the bitmap parameter and with xmove and ymove set to the offsets of the new raster position. This technique is useful when panning an image around the viewport. Errors • GL_INVALID_VALUE is generated if width or height is negative. • GL_INVALID_OPERATION is generated if glBitmap is executed between the execution of glBegin and the corresponding execution of glEnd. Associated Gets glGet with argument GL_CURRENT_RASTER_POSITION glGet with argument GL_CURRENT_RASTER_COLOR glGet with argument GL_CURRENT_RASTER_INDEX glGet with argument GL_CURRENT_RASTER_TEXTURE_COORDS glGet with argument GL_CURRENT_RASTER_POSITION_VALID See Also glDrawPixels, glPixelStore, glPixelTransfer, glRasterPos Chapter 2 31