java.lang.Object
- org.lwjgl.opengles.OESGeometryShader

```
public class OESGeometryShader
extends java.lang.Object
```
Native bindings to the OES_geometry_shader extension.
OES_geometry_shader defines a new shader type available to be run on the GPU, called a geometry shader. Geometry shaders are run after vertices are transformed, but prior to color clamping, flatshading and clipping.

A geometry shader begins with a single primitive (point, line, triangle). It can read the attributes of any of the vertices in the primitive and use them to generate new primitives. A geometry shader has a fixed output primitive type (point, line strip, or triangle strip) and emits vertices to define a new primitive. A geometry shader can emit multiple disconnected primitives. The primitives emitted by the geometry shader are clipped and then processed like an equivalent primitive specified by the application.

Furthermore, OES_geometry_shader provides four additional primitive types: lines with adjacency, line strips with adjacency, separate triangles with adjacency, and triangle strips with adjacency. Some of the vertices specified in these new primitive types are not part of the ordinary primitives, instead they represent neighboring vertices that are adjacent to the two line segment end points (lines/strips) or the three triangle edges (triangles/tstrips). These vertices can be accessed by geometry shaders and used to match up the vertices emitted by the geometry shader with those of neighboring primitives.

Since geometry shaders expect a specific input primitive type, an error will occur if the application presents primitives of a different type. For example, if a geometry shader expects points, an error will occur at drawing time if a primitive mode of TRIANGLES is specified.

This extension also adds the notion of layered framebuffer attachments and framebuffers that can be used in conjunction with geometry shaders to allow programs to direct primitives to a face of a cube map or layer of a three-dimensional texture or two-dimensional array texture. The layer used for rendering can be selected by the geometry shader at run time. The framebuffer layer count present in GL 4.x and removed from ES 3.1 is restored.

Not all geometry shader implementations have the ability to write the point size from a geometry shader. Thus a second extension string and shading language enable are provided for implementations which do support geometry shader point size.

This extension relies on the OES_shader_io_blocks extension to provide the required functionality for declaring input and output blocks and interfacing between shaders.

Requires GLES 3.1 and OES_shader_io_blocks or EXT_shader_io_blocks.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`GL_FIRST_VERTEX_CONVENTION_OES` Returned in the `data` parameter from a Get query with a `pname` of LAYER_PROVOKING_VERTEX_OES.
`static int`	`GL_FRAMEBUFFER_ATTACHMENT_LAYERED_OES` Accepted by the `pname` parameter of GetFramebufferAttachmentParameteriv.
`static int`	`GL_FRAMEBUFFER_DEFAULT_LAYERS_OES` Accepted by the `pname` parameter of FramebufferParameteri, and GetFramebufferParameteriv.
`static int`	`GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_OES` Returned by CheckFramebufferStatus.
`static int`	`GL_GEOMETRY_LINKED_INPUT_TYPE_OES GL_GEOMETRY_LINKED_OUTPUT_TYPE_OES GL_GEOMETRY_LINKED_VERTICES_OUT_OES` Accepted by the `pname` parameter of GetProgramiv.
`static int`	`GL_GEOMETRY_SHADER_BIT_OES` Accepted by the `stages` parameter of UseProgramStages.
`static int`	`GL_GEOMETRY_SHADER_INVOCATIONS_OES` Accepted by the `pname` parameter of GetProgramiv.
`static int`	`GL_GEOMETRY_SHADER_OES` Accepted by the `type` parameter of CreateShader and CreateShaderProgramv, by the `pname` parameter of GetProgramPipelineiv and returned in the `params` parameter of GetShaderiv when `pname` is SHADER_TYPE.
`static int`	`GL_LAST_VERTEX_CONVENTION_OES` Returned in the `data` parameter from a Get query with a `pname` of LAYER_PROVOKING_VERTEX_OES.
`static int`	`GL_LAYER_PROVOKING_VERTEX_OES` Accepted by the `pname` parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
`static int`	`GL_LINE_STRIP_ADJACENCY_OES GL_LINES_ADJACENCY_OES` Accepted by the `mode` parameter of DrawArrays, DrawElements, and other commands which draw primitives.
`static int`	`GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS_OES` Accepted by the `pname` parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
`static int`	`GL_MAX_FRAMEBUFFER_LAYERS_OES` Accepted by the `pname` parameter of GetIntegerv, GetBooleanv, GetInteger64v, and GetFloatv.
`static int`	`GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS_OES GL_MAX_GEOMETRY_ATOMIC_COUNTERS_OES GL_MAX_GEOMETRY_IMAGE_UNIFORMS_OES GL_MAX_GEOMETRY_INPUT_COMPONENTS_OES GL_MAX_GEOMETRY_OUTPUT_COMPONENTS_OES GL_MAX_GEOMETRY_OUTPUT_VERTICES_OES GL_MAX_GEOMETRY_SHADER_INVOCATIONS_OES GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS_OES GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_OES GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_OES GL_MAX_GEOMETRY_UNIFORM_BLOCKS_OES GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_OES` Accepted by the `pname` parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
`static int`	`GL_PRIMITIVES_GENERATED_OES` Accepted by the `target` parameter of BeginQuery, EndQuery, GetQueryiv, and GetQueryObjectuiv.
`static int`	`GL_REFERENCED_BY_GEOMETRY_SHADER_OES` Accepted by the `props` parameter of GetProgramResourceiv.
`static int`	`GL_TRIANGLE_STRIP_ADJACENCY_OES GL_TRIANGLES_ADJACENCY_OES` Accepted by the `mode` parameter of DrawArrays, DrawElements, and other commands which draw primitives.
`static int`	`GL_UNDEFINED_VERTEX_OES` Returned in the `data` parameter from a Get query with a `pname` of LAYER_PROVOKING_VERTEX_OES.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`glFramebufferTextureOES(int target, int attachment, int texture, int level)`

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

- Field Detail
  - GL_GEOMETRY_SHADER_OES
```
public static final int GL_GEOMETRY_SHADER_OES
```
    Accepted by the type parameter of CreateShader and CreateShaderProgramv, by the pname parameter of GetProgramPipelineiv and returned in the params parameter of GetShaderiv when pname is SHADER_TYPE.
    
    See Also:
    
    Constant Field Values
  - GL_GEOMETRY_SHADER_BIT_OES
```
public static final int GL_GEOMETRY_SHADER_BIT_OES
```
    Accepted by the stages parameter of UseProgramStages.
    
    See Also:
    
    Constant Field Values
  - GL_GEOMETRY_LINKED_VERTICES_OUT_OES
```
public static final int GL_GEOMETRY_LINKED_VERTICES_OUT_OES
```
    Accepted by the pname parameter of GetProgramiv.
    
    See Also:
    
    Constant Field Values
  - GL_GEOMETRY_LINKED_INPUT_TYPE_OES
```
public static final int GL_GEOMETRY_LINKED_INPUT_TYPE_OES
```
    Accepted by the pname parameter of GetProgramiv.
    
    See Also:
    
    Constant Field Values
  - GL_GEOMETRY_LINKED_OUTPUT_TYPE_OES
```
public static final int GL_GEOMETRY_LINKED_OUTPUT_TYPE_OES
```
    Accepted by the pname parameter of GetProgramiv.
    
    See Also:
    
    Constant Field Values
  - GL_GEOMETRY_SHADER_INVOCATIONS_OES
```
public static final int GL_GEOMETRY_SHADER_INVOCATIONS_OES
```
    Accepted by the pname parameter of GetProgramiv.
    
    See Also:
    
    Constant Field Values
  - GL_LAYER_PROVOKING_VERTEX_OES
```
public static final int GL_LAYER_PROVOKING_VERTEX_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_OES
```
public static final int GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_UNIFORM_BLOCKS_OES
```
public static final int GL_MAX_GEOMETRY_UNIFORM_BLOCKS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS_OES
```
public static final int GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_INPUT_COMPONENTS_OES
```
public static final int GL_MAX_GEOMETRY_INPUT_COMPONENTS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_OUTPUT_COMPONENTS_OES
```
public static final int GL_MAX_GEOMETRY_OUTPUT_COMPONENTS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_OUTPUT_VERTICES_OES
```
public static final int GL_MAX_GEOMETRY_OUTPUT_VERTICES_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_OES
```
public static final int GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_SHADER_INVOCATIONS_OES
```
public static final int GL_MAX_GEOMETRY_SHADER_INVOCATIONS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_OES
```
public static final int GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS_OES
```
public static final int GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_ATOMIC_COUNTERS_OES
```
public static final int GL_MAX_GEOMETRY_ATOMIC_COUNTERS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_IMAGE_UNIFORMS_OES
```
public static final int GL_MAX_GEOMETRY_IMAGE_UNIFORMS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS_OES
```
public static final int GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS_OES
```
    Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetInteger64v.
    
    See Also:
    
    Constant Field Values
  - GL_FIRST_VERTEX_CONVENTION_OES
```
public static final int GL_FIRST_VERTEX_CONVENTION_OES
```
    Returned in the data parameter from a Get query with a pname of LAYER_PROVOKING_VERTEX_OES.
    
    See Also:
    
    Constant Field Values
  - GL_LAST_VERTEX_CONVENTION_OES
```
public static final int GL_LAST_VERTEX_CONVENTION_OES
```
    Returned in the data parameter from a Get query with a pname of LAYER_PROVOKING_VERTEX_OES.
    
    See Also:
    
    Constant Field Values
  - GL_UNDEFINED_VERTEX_OES
```
public static final int GL_UNDEFINED_VERTEX_OES
```
    Returned in the data parameter from a Get query with a pname of LAYER_PROVOKING_VERTEX_OES.
    
    See Also:
    
    Constant Field Values
  - GL_PRIMITIVES_GENERATED_OES
```
public static final int GL_PRIMITIVES_GENERATED_OES
```
    Accepted by the target parameter of BeginQuery, EndQuery, GetQueryiv, and GetQueryObjectuiv.
    
    See Also:
    
    Constant Field Values
  - GL_LINES_ADJACENCY_OES
```
public static final int GL_LINES_ADJACENCY_OES
```
    Accepted by the mode parameter of DrawArrays, DrawElements, and other commands which draw primitives.
    
    See Also:
    
    Constant Field Values
  - GL_LINE_STRIP_ADJACENCY_OES
```
public static final int GL_LINE_STRIP_ADJACENCY_OES
```
    Accepted by the mode parameter of DrawArrays, DrawElements, and other commands which draw primitives.
    
    See Also:
    
    Constant Field Values
  - GL_TRIANGLES_ADJACENCY_OES
```
public static final int GL_TRIANGLES_ADJACENCY_OES
```
    Accepted by the mode parameter of DrawArrays, DrawElements, and other commands which draw primitives.
    
    See Also:
    
    Constant Field Values
  - GL_TRIANGLE_STRIP_ADJACENCY_OES
```
public static final int GL_TRIANGLE_STRIP_ADJACENCY_OES
```
    Accepted by the mode parameter of DrawArrays, DrawElements, and other commands which draw primitives.
    
    See Also:
    
    Constant Field Values
  - GL_FRAMEBUFFER_DEFAULT_LAYERS_OES
```
public static final int GL_FRAMEBUFFER_DEFAULT_LAYERS_OES
```
    Accepted by the pname parameter of FramebufferParameteri, and GetFramebufferParameteriv.
    
    See Also:
    
    Constant Field Values
  - GL_MAX_FRAMEBUFFER_LAYERS_OES
```
public static final int GL_MAX_FRAMEBUFFER_LAYERS_OES
```
    Accepted by the pname parameter of GetIntegerv, GetBooleanv, GetInteger64v, and GetFloatv.
    
    See Also:
    
    Constant Field Values
  - GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_OES
```
public static final int GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_OES
```
    Returned by CheckFramebufferStatus.
    
    See Also:
    
    Constant Field Values
  - GL_FRAMEBUFFER_ATTACHMENT_LAYERED_OES
```
public static final int GL_FRAMEBUFFER_ATTACHMENT_LAYERED_OES
```
    Accepted by the pname parameter of GetFramebufferAttachmentParameteriv.
    
    See Also:
    
    Constant Field Values
  - GL_REFERENCED_BY_GEOMETRY_SHADER_OES
```
public static final int GL_REFERENCED_BY_GEOMETRY_SHADER_OES
```
    Accepted by the props parameter of GetProgramResourceiv.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - glFramebufferTextureOES
```
public static void glFramebufferTextureOES(int target,
                                           int attachment,
                                           int texture,
                                           int level)
```

Class OESGeometryShader

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

GL_GEOMETRY_SHADER_OES

GL_GEOMETRY_SHADER_BIT_OES

GL_GEOMETRY_LINKED_VERTICES_OUT_OES

GL_GEOMETRY_LINKED_INPUT_TYPE_OES

GL_GEOMETRY_LINKED_OUTPUT_TYPE_OES

GL_GEOMETRY_SHADER_INVOCATIONS_OES

GL_LAYER_PROVOKING_VERTEX_OES

GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_OES

GL_MAX_GEOMETRY_UNIFORM_BLOCKS_OES

GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS_OES

GL_MAX_GEOMETRY_INPUT_COMPONENTS_OES

GL_MAX_GEOMETRY_OUTPUT_COMPONENTS_OES

GL_MAX_GEOMETRY_OUTPUT_VERTICES_OES

GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_OES

GL_MAX_GEOMETRY_SHADER_INVOCATIONS_OES

GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_OES

GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS_OES

GL_MAX_GEOMETRY_ATOMIC_COUNTERS_OES

GL_MAX_GEOMETRY_IMAGE_UNIFORMS_OES

GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS_OES

GL_FIRST_VERTEX_CONVENTION_OES

GL_LAST_VERTEX_CONVENTION_OES

GL_UNDEFINED_VERTEX_OES

GL_PRIMITIVES_GENERATED_OES

GL_LINES_ADJACENCY_OES

GL_LINE_STRIP_ADJACENCY_OES

GL_TRIANGLES_ADJACENCY_OES

GL_TRIANGLE_STRIP_ADJACENCY_OES

GL_FRAMEBUFFER_DEFAULT_LAYERS_OES

GL_MAX_FRAMEBUFFER_LAYERS_OES

GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_OES

GL_FRAMEBUFFER_ATTACHMENT_LAYERED_OES

GL_REFERENCED_BY_GEOMETRY_SHADER_OES

Method Detail

glFramebufferTextureOES