Rechercher une page de manuel
glPixelZoom.3gl
Langue: en
Version: 377872 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
glPixelZoom - specify the pixel zoom factorsC SPECIFICATION
void glPixelZoom( GLfloat xfactor,GLfloat yfactor )
delim $$
PARAMETERS
- xfactor, yfactor
- Specify the $x$ and $y$ zoom factors for pixel write operations.
DESCRIPTION
glPixelZoom specifies values for the $x$ and $y$ zoom factors. During the execution of glDrawPixels or glCopyPixels, if ($xr $, $yr $) is the current raster position, and a given element is in the $m$th row and $n$th column of the pixel rectangle, then pixels whose centers are in the rectangle with corners atare 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.
ERRORS
GL_INVALID_OPERATION is generated if glPixelZoom is executed between the execution of glBegin and the corresponding execution of glEnd.ASSOCIATED GETS
glGet with argument GL_ZOOM_XglGet with argument GL_ZOOM_Y
SEE ALSO
glCopyPixels(3G), glDrawPixels(3G)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre