GLGETPIXELMAP - Online Linux Manual PageSection : 3G
NAME"glGetPixelMapfv, glGetPixelMapuiv, glGetPixelMapusv − return the specified pixel map
C SPECIFICATIONvoid glGetPixelMapfv( GLenum map, GLfloat *values )void glGetPixelMapuiv( GLenum map, GLuint *values )void glGetPixelMapusv( GLenum map, GLushort *values )
PARAMETERSmap  Specifies the name of the pixel map to return. Accepted values are ­GL_PIXEL_MAP_I_TO_I, ­GL_PIXEL_MAP_S_TO_S, ­GL_PIXEL_MAP_I_TO_R, ­GL_PIXEL_MAP_I_TO_G, ­GL_PIXEL_MAP_I_TO_B, ­GL_PIXEL_MAP_I_TO_A, ­GL_PIXEL_MAP_R_TO_R, ­GL_PIXEL_MAP_G_TO_G, ­GL_PIXEL_MAP_B_TO_B, and ­GL_PIXEL_MAP_A_TO_A. values  Returns the pixel map contents.
DESCRIPTIONSee the ­glPixelMap reference page for a description of the acceptable values for the map parameter. ­glGetPixelMap returns in values the contents of the pixel map specified in map. Pixel maps are used during the execution of ­glReadPixels, ­glDrawPixels, ­glCopyPixels, ­glTexImage1D, ­glTexImage2D, ­glTexImage3D, ­glTexSubImage1D, ­glTexSubImage2D, ­glTexSubImage3D, ­glCopyTexImage1D, ­glCopyTexImage2D, ­glCopyTexSubImage1D, ­glCopyTexSubImage2D, ­glCopyTexSubImage3D, ­glColorTable, ­glColorSubTable, ­glCopyColorTable, ­glCopyColorSubTable, ­glConvolutionFilter1D, ­glConvolutionFilter2D, ­glSeparableFilter2D, ­glGetHistogram, ­glGetMinmax, and ­glGetTexImage to map color indices, stencil indices, color components, and depth components to other values. Unsigned integer values, if requested, are linearly mapped from the internal fixed or floating-point representation such that 1.0 maps to the largest representable integer value, and 0.0 maps to 0. Return unsigned integer values are undefined if the map value was not in the range [0,1]. To determine the required size of map, call ­glGet with the appropriate symbolic constant.
NOTESIf an error is generated, no change is made to the contents of values.
ERRORS­GL_INVALID_ENUM is generated if map is not an accepted value. ­GL_INVALID_OPERATION is generated if ­glGetPixelMap is executed between the execution of ­glBegin and the corresponding execution of ­glEnd.
ASSOCIATED GETS­glGet with argument ­GL_PIXEL_MAP_I_TO_I_SIZE
­glGet with argument ­GL_PIXEL_MAP_S_TO_S_SIZE
­glGet with argument ­GL_PIXEL_MAP_I_TO_R_SIZE
­glGet with argument ­GL_PIXEL_MAP_I_TO_G_SIZE
­glGet with argument ­GL_PIXEL_MAP_I_TO_B_SIZE
­glGet with argument ­GL_PIXEL_MAP_I_TO_A_SIZE
­glGet with argument ­GL_PIXEL_MAP_R_TO_R_SIZE
­glGet with argument ­GL_PIXEL_MAP_G_TO_G_SIZE
­glGet with argument ­GL_PIXEL_MAP_B_TO_B_SIZE
­glGet with argument ­GL_PIXEL_MAP_A_TO_A_SIZE
­glGet with argument ­GL_MAX_PIXEL_MAP_TABLE
SEE ALSO­glColorSubTable(3G), ­glColorTable(3G), ­glConvolutionFilter1D(3G), ­glConvolutionFilter2D(3G), ­glCopyColorSubTable(3G), ­glCopyColorTable(3G), ­glCopyPixels(3G), ­glCopyTexImage1D(3G), ­glCopyTexImage2D(3G), ­glCopyTexSubImage1D(3G), ­glCopyTexSubImage2D(3G), ­glCopyTexSubImage3D(3G), ­glDrawPixels(3G), ­glGetHistogram(3G), ­glGetMinmax(3G), ­glGetTexImage(3G), ­glPixelMap(3G), ­glPixelTransfer(3G), ­glReadPixels(3G), ­glSeparableFilter2D(3G), ­glTexImage1D(3G), ­glTexImage2D(3G) ­glTexImage3D(3G), ­glTexSubImage1D(3G), ­glTexSubImage2D(3G), ­glTexSubImage3D(3G) 0
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