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glGetPixelMapfv, glGetPixelMapuiv, glGetPixelMapusv - return the
specified pixel map
void glGetPixelMapfv( GLenum map,
GLfloat *values )
void glGetPixelMapuiv( GLenum map,
GLuint *values )
void glGetPixelMapusv( GLenum map,
GLushort *values )
- 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.
See 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.
If an error is generated,
no change is made to the contents of values.
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.
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
glColorSubTable(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)
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