CN108257075B - Dereferencing and assembling method for vertex array command - Google Patents
Dereferencing and assembling method for vertex array command Download PDFInfo
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- CN108257075B CN108257075B CN201711280984.3A CN201711280984A CN108257075B CN 108257075 B CN108257075 B CN 108257075B CN 201711280984 A CN201711280984 A CN 201711280984A CN 108257075 B CN108257075 B CN 108257075B
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Abstract
The invention belongs to the field of computer graphics, and relates to a method for dereferencing and assembling vertex array commands, which comprises the following steps: step 1, initial state of vertex array assembly; step 2, judging the type of the vertex array command; step 3, dereferencing the single vertex group class; step 4, dereferencing the multi-vertex group class; step 5, obtaining an attribute index address; step 6, calculating the storage address of the effective attribute; step 7, obtaining single-vertex effective attribute data; step 8, supporting the assembly of the attribute array with local disorder; 9, issuing a single-vertex effective attribute drawing command; step 10, completing a single vertex attribute command; step 11, inquiring the number of vertexes carried by the multi-vertex array command; step 12, completing a multi-vertex array command; and step 13, dereferencing and assembling the vertex array.
Description
Technical Field
The invention belongs to the field of computer graphics, and relates to a method for dereferencing and assembling vertex array commands.
Background
In the graphics processor, before the 3D engine receives the vertex group command, the 3D engine needs to perform dereferencing and assembling of the command, assembles the command into an agreed packet header and a format of each component attribute data, and then issues the packet header and the format into the 3D engine to execute a graphics drawing process, so that a simple and efficient vertex group command dereferencing and assembling mechanism has important influence on the graphics drawing efficiency of the graphics processor. The currently disclosed research is mostly directed to the research of the unified stainer kernel and the graphics processing algorithm, and no research on the dereferencing and assembling method of the vertex array command is found.
Disclosure of Invention
The purpose of the invention is:
the invention mainly provides a dereferencing and assembling method of vertex array commands, which is beneficial to reducing the number of graphics application programs, reducing the transmission number of graphics commands of a host and improving the graphics drawing efficiency.
The solution of the invention is:
a method for dereferencing and assembling vertex array commands, comprising:
step 2, judging the type of the vertex array command, judging that the current command needs to draw a single vertex and attribute information thereof or at least two vertexes and attributes according to the input command code, if the current command needs to draw a single vertex and attribute information thereof, turning to step 3, and if the current command does not need to draw a single vertex and attribute information thereof, turning to step 4;
step 3, dereferencing the single-vertex array class, dereferencing the packet head parts of at least two effective attribute drawing commands of a single vertex according to the input configuration information, and turning to step 6 if dereferencing is finished;
step 4, dereferencing the multi-vertex groups, dereferencing the packet head parts of at least two vertexes which have at least two effective attribute drawing commands according to the input configuration information, and turning to step 5 if dereferencing is completed;
step 5, acquiring an attribute index address, acquiring at least two vertex array commands from a defined storage space according to input configuration information, calculating the attribute index address required by each vertex in the vertex array commands, and turning to step 6 if an effective index address is acquired;
step 6, calculating the storage addresses of the effective attributes, calculating the storage address information of each effective attribute acquired from the defined attribute array according to the input configuration information, and turning to step 7 if the calculation is finished;
step 7, acquiring single-vertex effective attribute data, acquiring and caching each effective attribute data according to the storage address of each effective attribute, and then turning to step 8;
step 9, issuing a single-vertex effective attribute drawing command, counting and identifying attribute data assembly and issuing information of the same vertex, and turning to step 10 when all effective attributes of the same vertex are completely assembled and issued;
step 10, completing the single-vertex attribute command, if the single-vertex attribute command is a single-vertex array type command, turning to step 13, identifying that dereferencing and assembling of the single-vertex array are completed, and if the single-vertex attribute command is a multi-vertex array type command, turning to step 11;
step 11, inquiring the vertex number carried by the multi-vertex array command, inquiring whether the vertex needing to be drawn and the effective attribute thereof carried by the current command are acquired, cached, assembled and issued, if the vertex is not drawn, turning to step 5 to acquire an attribute index address, and if the assembly and the issue of all the current vertices are finished, turning to step 12;
step 12, completing the multi-vertex array command, identifying that the dereferencing and assembling of all vertex arrays carried by the command are completed, and turning to step 13;
and step 13, completing dereferencing and assembling of the vertex array, completing dereferencing and assembling processes of the identification vertex array class command, and turning to step 1.
The invention has the beneficial effects that: the method realizes the dereferencing and assembling of the input vertex group commands, and simultaneously uses the assembling method of local disorder and global sequence, thereby effectively improving the dereferencing and assembling efficiency of the commands, being beneficial to reducing the number of graphic application programs, reducing the transmission number of the graphic commands of the host and improving the graphic drawing efficiency.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a method for dereferencing and assembling vertex array commands,
step 2, judging the type of the vertex array command, judging that the current command needs to draw a single vertex and attribute information thereof or at least two vertexes and attributes according to the input command code, if the current command needs to draw a single vertex and attribute information thereof, turning to step 3, and if the current command does not need to draw a single vertex and attribute information thereof, turning to step 4;
step 3, dereferencing the single-vertex array class, dereferencing the packet head parts of at least two effective attribute drawing commands of a single vertex according to the input configuration information, and turning to step 6 if dereferencing is finished;
step 4, dereferencing the multi-vertex groups, dereferencing the packet head parts of at least two vertexes which have at least two effective attribute drawing commands according to the input configuration information, and turning to step 5 if dereferencing is completed;
step 5, acquiring an attribute index address, acquiring at least two vertex array commands from a defined storage space according to input configuration information, calculating the attribute index address required by each vertex in the vertex array commands, and turning to step 6 if an effective index address is acquired;
step 6, calculating the storage addresses of the effective attributes, calculating the storage address information of each effective attribute acquired from the defined attribute array according to the input configuration information, and turning to step 7 if the calculation is finished;
step 7, acquiring single-vertex effective attribute data, acquiring and caching each effective attribute data according to the storage address of each effective attribute, and then turning to step 8;
step 9, issuing a single-vertex effective attribute drawing command, counting and identifying attribute data assembly and issuing information of the same vertex, and turning to step 10 when all effective attributes of the same vertex are completely assembled and issued;
step 10, completing the single-vertex attribute command, if the single-vertex attribute command is a single-vertex array type command, turning to step 13, identifying that dereferencing and assembling of the single-vertex array are completed, and if the single-vertex attribute command is a multi-vertex array type command, turning to step 11;
step 11, inquiring the vertex number carried by the multi-vertex array command, inquiring whether the vertex needing to be drawn and the effective attribute thereof carried by the current command are acquired, cached, assembled and issued, if the vertex is not drawn, turning to step 5 to acquire an attribute index address, and if the assembly and the issue of all the current vertices are finished, turning to step 12;
step 12, completing the multi-vertex array command, identifying that the dereferencing and assembling of all vertex arrays carried by the command are completed, and turning to step 13;
and step 13, completing dereferencing and assembling of the vertex array, completing dereferencing and assembling processes of the identification vertex array class command, and turning to step 1.
Claims (1)
1. A method for dereferencing and assembling vertex array commands,
step 1, monitoring whether effective vertex array class command input is received or not in an initial state of vertex array assembly, and if the input command is effective, turning to step 2;
step 2, judging the type of the vertex array command, judging that the current command needs to draw a single vertex and attribute information thereof or at least two vertexes and attributes according to the input command code, if the current command needs to draw a single vertex and attribute information thereof, turning to step 3, and if the current command does not need to draw a single vertex and attribute information thereof, turning to step 4;
step 3, dereferencing the single-vertex array class, dereferencing the packet head parts of at least two effective attribute drawing commands of a single vertex according to the input configuration information, and turning to step 6 if dereferencing is finished;
step 4, dereferencing the multi-vertex groups, dereferencing the packet head parts of at least two vertexes which have at least two effective attribute drawing commands according to the input configuration information, and turning to step 5 if dereferencing is completed;
step 5, acquiring an attribute index address, acquiring at least two vertex array commands from a defined storage space according to input configuration information, calculating the attribute index address required by each vertex in the vertex array commands, and turning to step 6 if an effective index address is acquired;
step 6, calculating the storage addresses of the effective attributes, calculating the storage address information of each effective attribute acquired from the defined attribute array according to the input configuration information, and turning to step 7 if the calculation is finished;
step 7, acquiring single-vertex effective attribute data, acquiring and caching each effective attribute data according to the storage address of each effective attribute, and then turning to step 8;
step 8, supporting the assembly of the attribute array of the local disorder, assembling the obtained effective attribute data into an agreed packet header and each component attribute data format, in the assembly process, except for representing the attributes of the vertex coordinates, other attributes belonging to the same vertex can be assembled in a disorder manner but are only limited to the local disorder, the order is still maintained among the attributes belonging to different vertices, and the step 9 is switched to after the assembly is finished;
step 9, issuing a single-vertex effective attribute drawing command, counting and identifying attribute data assembly and issuing information of the same vertex, and turning to step 10 when all effective attributes of the same vertex are completely assembled and issued;
step 10, completing the single-vertex attribute command, if the single-vertex attribute command is a single-vertex array type command, turning to step 13, identifying that dereferencing and assembling of the single-vertex array are completed, and if the single-vertex attribute command is a multi-vertex array type command, turning to step 11;
step 11, inquiring the vertex number carried by the multi-vertex array command, inquiring whether the vertex needing to be drawn and the effective attribute thereof carried by the current command are acquired, cached, assembled and issued, if the vertex is not drawn, turning to step 5 to acquire an attribute index address, and if the assembly and the issue of all the current vertices are finished, turning to step 12;
step 12, completing the multi-vertex array command, identifying that the dereferencing and assembling of all vertex arrays carried by the command are completed, and turning to step 13;
and step 13, completing dereferencing and assembling of the vertex array, completing dereferencing and assembling processes of the identification vertex array class command, and turning to step 1.
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