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GLGETPIXELMAP() GLGETPIXELMAP() NAME glGetPixelMapfv, glGetPixelMapuiv, glGetPixelMapusv - return the speci- fied pixel map C SPECIFICATION void glGetPixelMapfv( GLenum map, GLfloat *values ) void glGetPixelMapuiv( GLenum map, GLuint *values ) void glGetPixelMapusv( GLenum map, GLushort *values ) PARAMETERS map 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. DESCRIPTION See the glPixelMap reference page for a description of the acceptable values for the map parameter. glGetPixelMap returns in values the con- tents of the pixel map specified in map. Pixel maps are used during the execution of glReadPixels, glDrawPixels, glCopyPixels, glTexIm- age1D, and glTexImage2D to map color indices, stencil indices, color components, and depth components to other values. Unsigned integer values, if requested, are linearly mapped from the in- ternal fixed or floating-point representation such that 1.0 maps to the largest representable integer value, and 0.0 maps to 0. Return un- signed 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. NOTES If an error is generated, no change is made to the contents of values. ERRORS GL_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 GETS glGet 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 ALSO glCopyPixels, glDrawPixels, glPixelMap, glPixelTransfer, glReadPixels, glTexImage1D, glTexImage2D GLGETPIXELMAP()
NAME | C SPECIFICATION | PARAMETERS | DESCRIPTION | NOTES | ERRORS | ASSOCIATED GETS | SEE ALSO
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