A system for creating high resolution video images for later use in printing or the like. The operator draws with a stylus on a touch tablet (28) and video signals are processed to produce a high resolution image corresponding to what is drawn, the signals being stored in a high resolution store (25). While the processing of the signals progresses certain signals are copied to a lower resolution viewing store (26) and these signals read to a display (27) where the image can be viewed by the operator. In one example the store (25) is notionally divided into areas and when the signals representing a stroke drawn by the operator are present in an area the whole area is copied to the viewing store. Typically about four areas need to be copied in a frame period so the stroke drawn by the operator can be seen as he is drawing it. The image on display (27) may be a low resolution version of the whole image or a high resolution version of part of the image.
A graphics system having a beamformer operating on image data and sub-pixel or fractional address data coming from a modified image memory and graphics processor producing correctly anti-aliased data to be shown on raster displays and in particular on color mosaic active matrix displays.
A method of resetting the screen display mode in a computer system having a display monitor is disclosed. The method is arranged to reset the display mode while a designated operating system such as a windowing environment based operating system is running, without requiring the operating system or any currently running application(s) to be exited and reloaded. The method includes the step of receiving a user initiated input requesting a change in the display mode. After a display mode request is received, the operating system display characteristic variables are reset to values that are appropriate for the requested display mode. Additionally, the display driver display characteristic variables are reset to values that are appropriate for the requested display mode. Moreover, the hardware mode is set to a mode that is appropriate for the requested display mode. After all of these resetting steps have been completed, the display screen is repented to display the images dictated by any program(s) that is/are currently running in the requested display mode.
A method of resetting the screen display mode in a computer system having a display monitor is disclosed. The method is arranged to reset the display mode while a designated operating system such as a windowing environment based operating system is running, without requiring the operating system or any currently running application(s) to be exited and reloaded. The method includes the step of receiving a user initiated input requesting a change in the display mode. After a display mode request is received, the operating system display characteristic variables are reset to values that are appropriate for the requested display mode. Additionally, the display driver display characteristic variables are reset to values that are appropriate for the requested display mode. Moreover, the hardware mode is set to a mode that is appropriate for the requested display mode. After all of these resetting steps have been completed, the display screen is repainted to display the images dictated by any program(s) that is/are currently running in the requested display mode.
A method of resetting the screen display mode in a computer system having a display monitor is disclosed. The method is arranged to reset the display mode while a designated operating system such as a windowing environment based operating system is running, without requiring the operating system or any currently running application(s) to be exited and reloaded. The method includes the step of receiving a user initiated input requesting a change in the display mode. After a display mode request is received, the operating system display characteristic variables are reset to values that are appropriate for the requested display mode. Additionally, the display driver display characteristic variables are reset to values that are appropriate for the requested display mode. Moreover, the hardware mode is set to a mode that is appropriate for the requested display mode. After all of these resetting steps have been completed, the display screen is repainted to display the images dictated by any program(s) that is/are currently running in the requested display mode.
To accelerate drawing input processing, a plurality of drawing pipelines 20 are provided and each drawing pipeline comprises a queue 21, a density data generator 23, a multiplier 24, an accumulator 25, and a cache 26. A stroke is divided, for example, into four, and allocated to each drawing pipeline 20. By each drawing pipeline 20, a next pixel is processed after a former pixel is processed for a plurality of patches according to the scan order.
