Package org.lwjgl.opengl

Class EXTGeometryShader4

java.lang.Object

org.lwjgl.opengl.EXTGeometryShader4

public class EXTGeometryShader4
extends java.lang.Object

Native bindings to the EXT_geometry_shader4 extension.

EXT_geometry_shader4 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, flat shading 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 OpenGL primitive specified by the application.

Furthermore, EXT_geometry_shader4 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 Begin() time, if a primitive mode of TRIANGLES is specified.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GL_FRAMEBUFFER_ATTACHMENT_LAYERED_EXT GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT Accepted by the pname parameter of GetFramebufferAttachment- ParameterivEXT.
static int	GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_EXT GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_EXT Returned by CheckFramebufferStatusEXT.
static int	GL_GEOMETRY_INPUT_TYPE_EXT GL_GEOMETRY_OUTPUT_TYPE_EXT Accepted by the pname parameter of ProgramParameteriEXT and GetProgramiv.
static int	GL_GEOMETRY_SHADER_EXT Accepted by the type parameter of CreateShader and returned by the params parameter of GetShaderiv.
static int	GL_GEOMETRY_VERTICES_OUT_EXT Accepted by the pname parameter of ProgramParameteriEXT and GetProgramiv.
static int	GL_LINE_STRIP_ADJACENCY_EXT GL_LINES_ADJACENCY_EXT Accepted by the mode parameter of Begin, DrawArrays, MultiDrawArrays, DrawElements, MultiDrawElements, and DrawRangeElements.
static int	GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_EXT GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_EXT GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_EXT GL_MAX_GEOMETRY_VARYING_COMPONENTS_EXT GL_MAX_VARYING_COMPONENTS_EXT GL_MAX_VERTEX_VARYING_COMPONENTS_EXT Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
static int	GL_PROGRAM_POINT_SIZE_EXT Accepted by the cap parameter of Enable, Disable, and IsEnabled, and by the pname parameter of GetIntegerv, GetFloatv, GetDoublev, and GetBooleanv.
static int	GL_TRIANGLE_STRIP_ADJACENCY_EXT GL_TRIANGLES_ADJACENCY_EXT Accepted by the mode parameter of Begin, DrawArrays, MultiDrawArrays, DrawElements, MultiDrawElements, and DrawRangeElements.

Method Summary

Modifier and Type	Method and Description
static void	glFramebufferTextureEXT(int target, int attachment, int texture, int level)
static void	glFramebufferTextureFaceEXT(int target, int attachment, int texture, int level, int face)
static void	glFramebufferTextureLayerEXT(int target, int attachment, int texture, int level, int layer)
static void	glProgramParameteriEXT(int program, int pname, int value)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

GL_GEOMETRY_SHADER_EXT

Accepted by the type parameter of CreateShader and returned by the params parameter of GetShaderiv.

GL_GEOMETRY_VERTICES_OUT_EXT, GL_GEOMETRY_INPUT_TYPE_EXT, GL_GEOMETRY_OUTPUT_TYPE_EXT

Accepted by the pname parameter of ProgramParameteriEXT and GetProgramiv.

GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_EXT, GL_MAX_GEOMETRY_VARYING_COMPONENTS_EXT, GL_MAX_VERTEX_VARYING_COMPONENTS_EXT, GL_MAX_VARYING_COMPONENTS_EXT, GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_EXT, GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT, GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_EXT

Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.

GL_LINES_ADJACENCY_EXT, GL_LINE_STRIP_ADJACENCY_EXT, GL_TRIANGLES_ADJACENCY_EXT, GL_TRIANGLE_STRIP_ADJACENCY_EXT

Accepted by the mode parameter of Begin, DrawArrays, MultiDrawArrays, DrawElements, MultiDrawElements, and DrawRangeElements.

GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_EXT, GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_EXT

Returned by CheckFramebufferStatusEXT.

GL_FRAMEBUFFER_ATTACHMENT_LAYERED_EXT, GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT

Accepted by the pname parameter of GetFramebufferAttachment- ParameterivEXT.

GL_PROGRAM_POINT_SIZE_EXT

Accepted by the cap parameter of Enable, Disable, and IsEnabled, and by the pname parameter of GetIntegerv, GetFloatv, GetDoublev, and GetBooleanv.

Method Detail

glProgramParameteriEXT

public static void glProgramParameteriEXT(int program,
                                          int pname,
                                          int value)

glFramebufferTextureEXT

public static void glFramebufferTextureEXT(int target,
                                           int attachment,
                                           int texture,
                                           int level)

glFramebufferTextureLayerEXT

public static void glFramebufferTextureLayerEXT(int target,
                                                int attachment,
                                                int texture,
                                                int level,
                                                int layer)

glFramebufferTextureFaceEXT

public static void glFramebufferTextureFaceEXT(int target,
                                               int attachment,
                                               int texture,
                                               int level,
                                               int face)