Image synthesizing system with texture mapping

An image synthesizing system for forming a displayed image comprising:

• a plurality of image computing units for determining coordinates of each of dots in polygons forming said displayed image and texture coordinates corresponding to said coordinates of dots by parallel calculation, said coordinates of dots and said texture coordinates being determined by three dimensional computation which includes perspective transformation;
• a plurality of field buffer units for storing said texture coordinates determined by said image computing units at an address specified by said coordinates of dots, instead of storing color data, the field buffer units storing said texture coordinates per pixel unit;
• a multiplexer unit for selecting said texture coordinates input from said field buffer units;
• a function computing unit that applies function computation to said texture coordinates input from said multiplexer unit to determine rendering data which include color data, wherein said function computing unit is shared by said plurality of field buffer units;
• only one rendering data storage unit for storing the rendering data;
• and
• a color synthesizing unit for receiving the color data which is included in the rendering data input from said function computing unit and for synthesizing color to be displayed.

An image synthesizing method for forming a displayed image which includes a polygon image and a background image, comprising:

• determining coordinates of dots in polygons forming said polygon image and determining polygon texture coordinates corresponding to said coordinates of dots by parallel calculation, said coordinates of dots and said polygon texture coordinates being determined by three dimensional computation which includes perspective transformation;
• storing said polygon texture coordinates at an address specified by said coordinates of dots, instead of storing color data, said polygon texture coordinates being stored per pixel unit;
• judging that a dot not used to display polygons in the displayed image is a background dot;
• generating background texture coordinates by given computation;
• selecting at least one of said polygon texture coordinates and said background texture coordinates, based on the judging that a dot not used to display polygons in the displayed image is a background dot;
• only one rendering data storage unit for storing rendering data;
• reading rendering data which include color data stored in a data storage unit at an address specified by the selected at least one of said polygon texture coordinates and said background texture coordinates;
• and
• receiving the color data which is included in the rendering data input from said rendering data storage unit and for synthesizing color to be displayed.

An image synthesizing method for forming a displayed image, comprising:

• determining coordinates of each of dots in polygons forming said displayed image and determining texture coordinates corresponding to said coordinates of dots by parallel calculation, said coordinates of dots and said texture coordinates being determined by three dimensional computation which includes perspective transformation;
• storing said texture coordinates in a plurality of field buffer units at addresses specified by said coordinates of dots, instead of storing color data, said texture coordinates being stored per pixel unit;
• selecting said texture coordinates from said plurality of field buffer units;
• reading rendering data which include color data stored in only one data storage unit at addresses specified by said texture coordinates selected for output from said plurality of field buffer units;
• and
• receiving the color data which is included in the rendering data input from said data storage unit and synthesizing color to be displayed.