GLsizei _h_e_i_g_h_t, GLfloat _x_o_r_i_g, GLfloat _y_o_r_i_g, GLfloat _x_m_o_v_e, GLfloat _y_m_o_v_e, const GLubyte _*_b_i_t_m_a_p )
delim $$
ggllBBiittmmaapp takes seven arguments. The first pair specifies the width and height of the bitmap image. The second pair specifies the location of the bitmap origin relative to the lower left corner of the bitmap image. The third pair of arguments specifies _x and _y offsets to be added to the current raster position after the bitmap has been drawn. The final argument is a pointer to the bitmap image itself.
The bitmap image is interpreted like image data for the ggllDDrraawwPPiixxeellss command, with _w_i_d_t_h and _h_e_i_g_h_t corresponding to the width and height arguments of that command, and with _t_y_p_e set to GGLL__BBIITTMMAAPP and _f_o_r_m_a_t set to GGLL__CCOOLLOORR__IINNDDEEXX. Modes specified using ggllPPiixxeellSSttoorree affect the interpretation of bitmap image data; modes specified using ggllPPiixxeellTTrraannssffeerr do not.
If the current raster position is invalid, ggllBBiittmmaapp is ignored.
Otherwise,
the lower left corner of the bitmap image is positioned at the window coordinates
$ x sub w ~=~ ~ x sub r ~-~ x sub o ~ $
$ y sub w ~=~ ~ y sub r ~-~ y sub o ~ $
where $ ( x sub r , y sub r ) $ is the raster position
and $ ( x sub o , y sub o ) $ is the bitmap origin.
Fragments are then generated for each pixel corresponding to a 1 (one)
in the bitmap image.
These fragments are generated using the current raster _z coordinate,
color or color index, and current raster texture coordinates.
They are then treated just as if they had been generated
by a point, line, or polygon,
including texture mapping,
fogging,
and all per-fragment operations such as alpha and depth testing.
After the bitmap has been drawn, the _x and _y coordinates of the current raster position are offset by _x_m_o_v_e and _y_m_o_v_e. No change is made to the _z coordinate of the current raster position, or to the current raster color, texture coordinates, or index.
GGLL__IINNVVAALLIIDD__OOPPEERRAATTIIOONN is generated if ggllBBiittmmaapp is executed between the execution of ggllBBeeggiinn and the corresponding execution of ggllEEnndd.