glPixelZoom — specify the pixel zoom factors
void glPixelZoom( | GLfloat | xfactor, |
GLfloat | yfactor) ; |
glPixelZoom
specifies values for the
(
(
are candidates for replacement. Any pixel whose center lies on the bottom or left edge of this rectangular region is also modified.
Pixel zoom factors are not limited to positive values. Negative zoom factors reflect the resulting image about the current raster position.
GL_INVALID_OPERATION
is generated if glPixelZoom
is executed between the execution of glBegin
and the corresponding execution of glEnd.
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