ARBDrawIndirect (LWJGL 3.2.4 SNAPSHOT

java.lang.Object
- org.lwjgl.opengl.ARBDrawIndirect

```
public class ARBDrawIndirect
extends java.lang.Object
```
Native bindings to the ARB_draw_indirect extension.
This extension provides a mechanism for supplying the arguments to a DrawArraysInstanced or DrawElementsInstancedBaseVertex from buffer object memory. This is not particularly useful for applications where the CPU knows the values of the arguments beforehand, but is helpful when the values will be generated on the GPU through any mechanism that can write to a buffer object including image stores, atomic counters, or compute interop. This allows the GPU to consume these arguments without a round- trip to the CPU or the expensive synchronization that would involve. This is similar to the DrawTransformFeedbackEXT command from EXT_transform_feedback2, but offers much more flexibility in both generating the arguments and in the type of Draws that can be accomplished.

Requires OpenGL 3.1. Promoted to core in OpenGL 4.0.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`GL_DRAW_INDIRECT_BUFFER` Accepted by the `target` parameters of BindBuffer, BufferData, BufferSubData, MapBuffer, UnmapBuffer, GetBufferSubData, GetBufferPointerv, MapBufferRange, FlushMappedBufferRange, GetBufferParameteriv, and CopyBufferSubData.
`static int`	`GL_DRAW_INDIRECT_BUFFER_BINDING` Accepted by the `value` parameter of GetIntegerv, GetBooleanv, GetFloatv, and GetDoublev.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`glDrawArraysIndirect(int mode, java.nio.ByteBuffer indirect)` Renders primitives from array data, taking parameters from memory.
`static void`	`glDrawArraysIndirect(int mode, int[] indirect)` Array version of: `DrawArraysIndirect`
`static void`	`glDrawArraysIndirect(int mode, java.nio.IntBuffer indirect)` Renders primitives from array data, taking parameters from memory.
`static void`	`glDrawArraysIndirect(int mode, long indirect)` Renders primitives from array data, taking parameters from memory.
`static void`	`glDrawElementsIndirect(int mode, int type, java.nio.ByteBuffer indirect)` Renders indexed primitives from array data, taking parameters from memory.
`static void`	`glDrawElementsIndirect(int mode, int type, int[] indirect)` Array version of: `DrawElementsIndirect`
`static void`	`glDrawElementsIndirect(int mode, int type, java.nio.IntBuffer indirect)` Renders indexed primitives from array data, taking parameters from memory.
`static void`	`glDrawElementsIndirect(int mode, int type, long indirect)` Renders indexed primitives from array data, taking parameters from memory.
`static void`	`nglDrawArraysIndirect(int mode, long indirect)` Unsafe version of: `DrawArraysIndirect`
`static void`	`nglDrawElementsIndirect(int mode, int type, long indirect)` Unsafe version of: `DrawElementsIndirect`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - GL_DRAW_INDIRECT_BUFFER
```
public static final int GL_DRAW_INDIRECT_BUFFER
```
    Accepted by the target parameters of BindBuffer, BufferData, BufferSubData, MapBuffer, UnmapBuffer, GetBufferSubData, GetBufferPointerv, MapBufferRange, FlushMappedBufferRange, GetBufferParameteriv, and CopyBufferSubData.
    
    See Also:
    
    Constant Field Values
  - GL_DRAW_INDIRECT_BUFFER_BINDING
```
public static final int GL_DRAW_INDIRECT_BUFFER_BINDING
```
    Accepted by the value parameter of GetIntegerv, GetBooleanv, GetFloatv, and GetDoublev.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - nglDrawArraysIndirect
```
public static void nglDrawArraysIndirect(int mode,
                                         long indirect)
```
    Unsafe version of: DrawArraysIndirect
  - glDrawArraysIndirect
```
public static void glDrawArraysIndirect(int mode,
                                        java.nio.ByteBuffer indirect)
```
    Renders primitives from array data, taking parameters from memory.
    glDrawArraysIndirect behaves similarly to DrawArraysInstancedBaseInstance, except that the parameters to glDrawArraysInstancedBaseInstance are stored in memory at the address given by indirect.
    
    The parameters addressed by indirect are packed into a structure that takes the form (in C):
```
 typedef struct {
     uint count;
     uint primCount;
     uint first;
     uint baseInstance; // must be 0 unless OpenGL 4.2 is supported
 } DrawArraysIndirectCommand;
 
 const DrawArraysIndirectCommand *cmd = (const DrawArraysIndirectCommand *)indirect;
 glDrawArraysInstancedBaseInstance(mode, cmd->first, cmd->count, cmd->primCount, cmd->baseInstance);
```
    Parameters:
    
    mode - what kind of primitives to render. One of:
    POINTS LINE_STRIP LINE_LOOP LINES TRIANGLE_STRIP TRIANGLE_FAN TRIANGLES
    LINES_ADJACENCY LINE_STRIP_ADJACENCY TRIANGLES_ADJACENCY TRIANGLE_STRIP_ADJACENCY PATCHES POLYGON QUADS
    QUAD_STRIP
    
    indirect - a structure containing the draw parameters
  - glDrawArraysIndirect
```
public static void glDrawArraysIndirect(int mode,
                                        long indirect)
```
    Renders primitives from array data, taking parameters from memory.
    glDrawArraysIndirect behaves similarly to DrawArraysInstancedBaseInstance, except that the parameters to glDrawArraysInstancedBaseInstance are stored in memory at the address given by indirect.
    
    The parameters addressed by indirect are packed into a structure that takes the form (in C):
```
 typedef struct {
     uint count;
     uint primCount;
     uint first;
     uint baseInstance; // must be 0 unless OpenGL 4.2 is supported
 } DrawArraysIndirectCommand;
 
 const DrawArraysIndirectCommand *cmd = (const DrawArraysIndirectCommand *)indirect;
 glDrawArraysInstancedBaseInstance(mode, cmd->first, cmd->count, cmd->primCount, cmd->baseInstance);
```
    Parameters:
    
    mode - what kind of primitives to render. One of:
    POINTS LINE_STRIP LINE_LOOP LINES TRIANGLE_STRIP TRIANGLE_FAN TRIANGLES
    LINES_ADJACENCY LINE_STRIP_ADJACENCY TRIANGLES_ADJACENCY TRIANGLE_STRIP_ADJACENCY PATCHES POLYGON QUADS
    QUAD_STRIP
    
    indirect - a structure containing the draw parameters
  - glDrawArraysIndirect
```
public static void glDrawArraysIndirect(int mode,
                                        java.nio.IntBuffer indirect)
```
    Renders primitives from array data, taking parameters from memory.
    glDrawArraysIndirect behaves similarly to DrawArraysInstancedBaseInstance, except that the parameters to glDrawArraysInstancedBaseInstance are stored in memory at the address given by indirect.
    
    The parameters addressed by indirect are packed into a structure that takes the form (in C):
```
 typedef struct {
     uint count;
     uint primCount;
     uint first;
     uint baseInstance; // must be 0 unless OpenGL 4.2 is supported
 } DrawArraysIndirectCommand;
 
 const DrawArraysIndirectCommand *cmd = (const DrawArraysIndirectCommand *)indirect;
 glDrawArraysInstancedBaseInstance(mode, cmd->first, cmd->count, cmd->primCount, cmd->baseInstance);
```
    Parameters:
    
    mode - what kind of primitives to render. One of:
    POINTS LINE_STRIP LINE_LOOP LINES TRIANGLE_STRIP TRIANGLE_FAN TRIANGLES
    LINES_ADJACENCY LINE_STRIP_ADJACENCY TRIANGLES_ADJACENCY TRIANGLE_STRIP_ADJACENCY PATCHES POLYGON QUADS
    QUAD_STRIP
    
    indirect - a structure containing the draw parameters
  - nglDrawElementsIndirect
```
public static void nglDrawElementsIndirect(int mode,
                                           int type,
                                           long indirect)
```
    Unsafe version of: DrawElementsIndirect
  - glDrawElementsIndirect
```
public static void glDrawElementsIndirect(int mode,
                                          int type,
                                          java.nio.ByteBuffer indirect)
```
    Renders indexed primitives from array data, taking parameters from memory.
    glDrawElementsIndirect behaves similarly to DrawElementsInstancedBaseVertexBaseInstance, execpt that the parameters to glDrawElementsInstancedBaseVertexBaseInstance are stored in memory at the address given by indirect.
    
    The parameters addressed by indirect are packed into a structure that takes the form (in C):
```
 typedef struct {
     uint count;
     uint primCount;
     uint firstIndex;
     uint baseVertex;
     uint baseInstance;
 } DrawElementsIndirectCommand;
```
    glDrawElementsIndirect is equivalent to:
```
 void glDrawElementsIndirect(GLenum mode, GLenum type, const void *indirect) {
     const DrawElementsIndirectCommand *cmd  = (const DrawElementsIndirectCommand *)indirect;
     glDrawElementsInstancedBaseVertexBaseInstance(
         mode,
         cmd->count,
         type,
         cmd->firstIndex + size-of-type,
         cmd->primCount,
         cmd->baseVertex,
         cmd->baseInstance
     );
 }
```
    Parameters:
    
    mode - what kind of primitives to render. One of:
    POINTS LINE_STRIP LINE_LOOP LINES TRIANGLE_STRIP TRIANGLE_FAN TRIANGLES
    LINES_ADJACENCY LINE_STRIP_ADJACENCY TRIANGLES_ADJACENCY TRIANGLE_STRIP_ADJACENCY PATCHES POLYGON QUADS
    QUAD_STRIP
    
    type - the type of data in the buffer bound to the ELEMENT_ARRAY_BUFFER binding. One of:
    UNSIGNED_BYTE UNSIGNED_SHORT UNSIGNED_INT
    
    indirect - the address of a structure containing the draw parameters
  - glDrawElementsIndirect
```
public static void glDrawElementsIndirect(int mode,
                                          int type,
                                          long indirect)
```
    Renders indexed primitives from array data, taking parameters from memory.
    glDrawElementsIndirect behaves similarly to DrawElementsInstancedBaseVertexBaseInstance, execpt that the parameters to glDrawElementsInstancedBaseVertexBaseInstance are stored in memory at the address given by indirect.
    
    The parameters addressed by indirect are packed into a structure that takes the form (in C):
```
 typedef struct {
     uint count;
     uint primCount;
     uint firstIndex;
     uint baseVertex;
     uint baseInstance;
 } DrawElementsIndirectCommand;
```
    glDrawElementsIndirect is equivalent to:
```
 void glDrawElementsIndirect(GLenum mode, GLenum type, const void *indirect) {
     const DrawElementsIndirectCommand *cmd  = (const DrawElementsIndirectCommand *)indirect;
     glDrawElementsInstancedBaseVertexBaseInstance(
         mode,
         cmd->count,
         type,
         cmd->firstIndex + size-of-type,
         cmd->primCount,
         cmd->baseVertex,
         cmd->baseInstance
     );
 }
```
    Parameters:
    
    mode - what kind of primitives to render. One of:
    POINTS LINE_STRIP LINE_LOOP LINES TRIANGLE_STRIP TRIANGLE_FAN TRIANGLES
    LINES_ADJACENCY LINE_STRIP_ADJACENCY TRIANGLES_ADJACENCY TRIANGLE_STRIP_ADJACENCY PATCHES POLYGON QUADS
    QUAD_STRIP
    
    type - the type of data in the buffer bound to the ELEMENT_ARRAY_BUFFER binding. One of:
    UNSIGNED_BYTE UNSIGNED_SHORT UNSIGNED_INT
    
    indirect - the address of a structure containing the draw parameters
  - glDrawElementsIndirect
```
public static void glDrawElementsIndirect(int mode,
                                          int type,
                                          java.nio.IntBuffer indirect)
```
    Renders indexed primitives from array data, taking parameters from memory.
    glDrawElementsIndirect behaves similarly to DrawElementsInstancedBaseVertexBaseInstance, execpt that the parameters to glDrawElementsInstancedBaseVertexBaseInstance are stored in memory at the address given by indirect.
    
    The parameters addressed by indirect are packed into a structure that takes the form (in C):
```
 typedef struct {
     uint count;
     uint primCount;
     uint firstIndex;
     uint baseVertex;
     uint baseInstance;
 } DrawElementsIndirectCommand;
```
    glDrawElementsIndirect is equivalent to:
```
 void glDrawElementsIndirect(GLenum mode, GLenum type, const void *indirect) {
     const DrawElementsIndirectCommand *cmd  = (const DrawElementsIndirectCommand *)indirect;
     glDrawElementsInstancedBaseVertexBaseInstance(
         mode,
         cmd->count,
         type,
         cmd->firstIndex + size-of-type,
         cmd->primCount,
         cmd->baseVertex,
         cmd->baseInstance
     );
 }
```
    Parameters:
    
    mode - what kind of primitives to render. One of:
    POINTS LINE_STRIP LINE_LOOP LINES TRIANGLE_STRIP TRIANGLE_FAN TRIANGLES
    LINES_ADJACENCY LINE_STRIP_ADJACENCY TRIANGLES_ADJACENCY TRIANGLE_STRIP_ADJACENCY PATCHES POLYGON QUADS
    QUAD_STRIP
    
    type - the type of data in the buffer bound to the ELEMENT_ARRAY_BUFFER binding. One of:
    UNSIGNED_BYTE UNSIGNED_SHORT UNSIGNED_INT
    
    indirect - the address of a structure containing the draw parameters
  - glDrawArraysIndirect
```
public static void glDrawArraysIndirect(int mode,
                                        int[] indirect)
```
    Array version of: DrawArraysIndirect
  - glDrawElementsIndirect
```
public static void glDrawElementsIndirect(int mode,
                                          int type,
                                          int[] indirect)
```
    Array version of: DrawElementsIndirect

`POINTS`	`LINE_STRIP`	`LINE_LOOP`	`LINES`	`TRIANGLE_STRIP`	`TRIANGLE_FAN`	`TRIANGLES`
`LINES_ADJACENCY`	`LINE_STRIP_ADJACENCY`	`TRIANGLES_ADJACENCY`	`TRIANGLE_STRIP_ADJACENCY`	`PATCHES`	`POLYGON`	`QUADS`
`QUAD_STRIP`

Class ARBDrawIndirect

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

GL_DRAW_INDIRECT_BUFFER

GL_DRAW_INDIRECT_BUFFER_BINDING

Method Detail

nglDrawArraysIndirect

glDrawArraysIndirect

glDrawArraysIndirect

glDrawArraysIndirect

nglDrawElementsIndirect

glDrawElementsIndirect

glDrawElementsIndirect

glDrawElementsIndirect

glDrawArraysIndirect

glDrawElementsIndirect