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Cogl Reference Manual | |
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void cogl_clip_push_rectangle (float x0,float y0,float x1,float y1); void cogl_clip_push_window_rectangle (int x_offset,int y_offset,int width,int height); void cogl_clip_push_from_path (void); void cogl_clip_push_from_path_preserve (void); void cogl_clip_pop (void);
To support clipping your geometry to rectangles or paths Cogl exposes a stack based API whereby each clip region you push onto the stack is intersected with the previous region.
void cogl_clip_push_rectangle (float x0,float y0,float x1,float y1);
Specifies a rectangular clipping area for all subsequent drawing operations. Any drawing commands that extend outside the rectangle will be clipped so that only the portion inside the rectangle will be displayed. The rectangle dimensions are transformed by the current model-view matrix.
The rectangle is intersected with the current clip region. To undo
the effect of this function, call cogl_clip_pop().
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x coordinate for top left corner of the clip rectangle |
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y coordinate for top left corner of the clip rectangle |
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x coordinate for bottom right corner of the clip rectangle |
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y coordinate for bottom right corner of the clip rectangle |
Since 1.2
void cogl_clip_push_window_rectangle (int x_offset,int y_offset,int width,int height);
Specifies a rectangular clipping area for all subsequent drawing operations. Any drawing commands that extend outside the rectangle will be clipped so that only the portion inside the rectangle will be displayed. The rectangle dimensions are not transformed by the current model-view matrix.
The rectangle is intersected with the current clip region. To undo
the effect of this function, call cogl_clip_pop().
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left edge of the clip rectangle in window coordinates |
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top edge of the clip rectangle in window coordinates |
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width of the clip rectangle |
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height of the clip rectangle |
Since 1.2
void cogl_clip_push_from_path (void);
Sets a new clipping area using the current path. The current path
is then cleared. The clipping area is intersected with the previous
clipping area. To restore the previous clipping area, call
cogl_clip_pop().
Since 1.0
Stability Level: Unstable
void cogl_clip_push_from_path_preserve (void);
Sets a new clipping area using the current path. The current path
is then cleared. The clipping area is intersected with the previous
clipping area. To restore the previous clipping area, call
cogl_clip_pop().
Since 1.0
void cogl_clip_pop (void);
Reverts the clipping region to the state before the last call to
cogl_clip_push().