Package org.lwjgl.opengl

Class EXTTransformFeedback

java.lang.Object

org.lwjgl.opengl.EXTTransformFeedback

public class EXTTransformFeedback
extends java.lang.Object

Native bindings to the EXT_transform_feedback extension.

This extension provides a new mode to the GL, called transform feedback, which records selected vertex attributes for each primitive processed by the GL. The selected attributes are written into buffer objects, and can be written with each attribute in a separate buffer object or with all attributes interleaved into a single buffer object. If a geometry shader is active, the primitives recorded are those emitted by the geometry shader. Otherwise, transform feedback captures primitives whose vertices are transformed by a vertex shader. In either case, the primitives captured are those generated prior to clipping. Transform feedback mode captures the values of specified varying variables emitted from GLSL vertex or geometry shaders.

The vertex data recorded in transform feedback mode is stored into buffer objects as an array of vertex attributes. The regular representation and the use of buffer objects allows the recorded data to be processed directly by the GL without requiring CPU intervention to copy data. In particular, transform feedback data can be used for vertex arrays (via vertex buffer objects), as the source for pixel data (via pixel buffer objects), as shader constant data (via the NV_parameter_buffer_object or EXT_bindable_uniform extensions), or via any other extension that makes use of buffer objects.

This extension introduces new query object support to allow transform feedback mode to operate asynchronously. Query objects allow applications to determine when transform feedback results are complete, as well as the number of primitives processed and written back to buffer objects while in transform feedback mode. This extension also provides a new rasterizer discard enable, which allows applications to use transform feedback to capture vertex attributes without rendering anything.

Requires OpenGL 2.0 or ARB_shader_objects. Promoted to core in OpenGL 3.0.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GL_INTERLEAVED_ATTRIBS_EXT Accepted by the bufferMode parameter of TransformFeedbackVaryingsEXT.
static int	GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS_EXT GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_EXT GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_EXT Accepted by the pname parameter of GetBooleanv, GetDoublev, GetIntegerv, and GetFloatv.
static int	GL_PRIMITIVES_GENERATED_EXT Accepted by the target parameter of BeginQuery, EndQuery, and GetQueryiv.
static int	GL_RASTERIZER_DISCARD_EXT Accepted by the cap parameter of Enable, Disable, and IsEnabled, and by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
static int	GL_SEPARATE_ATTRIBS_EXT Accepted by the bufferMode parameter of TransformFeedbackVaryingsEXT.
static int	GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_EXT Accepted by the param parameter of GetIntegerIndexedvEXT and GetBooleanIndexedvEXT, and by the pname parameter of GetBooleanv, GetDoublev, GetIntegerv, and GetFloatv.
static int	GL_TRANSFORM_FEEDBACK_BUFFER_EXT Accepted by the target parameters of BindBuffer, BufferData, BufferSubData, MapBuffer, UnmapBuffer, GetBufferSubData, GetBufferPointerv, BindBufferRangeEXT, BindBufferOffsetEXT and BindBufferBaseEXT.
static int	GL_TRANSFORM_FEEDBACK_BUFFER_MODE_EXT Accepted by the pname parameter of GetProgramiv.
static int	GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_EXT GL_TRANSFORM_FEEDBACK_BUFFER_START_EXT Accepted by the param parameter of GetIntegerIndexedvEXT and GetBooleanIndexedvEXT.
static int	GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_EXT Accepted by the target parameter of BeginQuery, EndQuery, and GetQueryiv.
static int	GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH_EXT GL_TRANSFORM_FEEDBACK_VARYINGS_EXT Accepted by the pname parameter of GetProgramiv.

Method Summary

Modifier and Type	Method and Description
static void	glBeginTransformFeedbackEXT(int primitiveMode)
static void	glBindBufferBaseEXT(int target, int index, int buffer)
static void	glBindBufferOffsetEXT(int target, int index, int buffer, long offset)
static void	glBindBufferRangeEXT(int target, int index, int buffer, long offset, long size)
static void	glEndTransformFeedbackEXT()
static boolean	glGetBooleanIndexedEXT(int param, int index)
static void	glGetBooleanIndexedvEXT(int param, int index, java.nio.ByteBuffer values)
static int	glGetIntegerIndexedEXT(int param, int index)
static void	glGetIntegerIndexedvEXT(int param, int index, int[] values) Array version of: GetIntegerIndexedvEXT
static void	glGetIntegerIndexedvEXT(int param, int index, java.nio.IntBuffer values)
static void	glGetTransformFeedbackVaryingEXT(int program, int index, int[] length, int[] size, int[] type, java.nio.ByteBuffer name) Array version of: GetTransformFeedbackVaryingEXT
static java.lang.String	glGetTransformFeedbackVaryingEXT(int program, int index, java.nio.IntBuffer size, java.nio.IntBuffer type)
static void	glGetTransformFeedbackVaryingEXT(int program, int index, java.nio.IntBuffer length, java.nio.IntBuffer size, java.nio.IntBuffer type, java.nio.ByteBuffer name)
static java.lang.String	glGetTransformFeedbackVaryingEXT(int program, int index, int bufSize, java.nio.IntBuffer size, java.nio.IntBuffer type)
static void	glTransformFeedbackVaryingsEXT(int program, java.lang.CharSequence[] varyings, int bufferMode)
static void	glTransformFeedbackVaryingsEXT(int program, java.lang.CharSequence varying, int bufferMode)
static void	glTransformFeedbackVaryingsEXT(int program, org.lwjgl.PointerBuffer varyings, int bufferMode)

Methods inherited from class java.lang.Object

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

Field Detail

GL_TRANSFORM_FEEDBACK_BUFFER_EXT

Accepted by the target parameters of BindBuffer, BufferData, BufferSubData, MapBuffer, UnmapBuffer, GetBufferSubData, GetBufferPointerv, BindBufferRangeEXT, BindBufferOffsetEXT and BindBufferBaseEXT.

GL_TRANSFORM_FEEDBACK_BUFFER_START_EXT, GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_EXT

Accepted by the param parameter of GetIntegerIndexedvEXT and GetBooleanIndexedvEXT.

GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_EXT

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

GL_INTERLEAVED_ATTRIBS_EXT, GL_SEPARATE_ATTRIBS_EXT

Accepted by the bufferMode parameter of TransformFeedbackVaryingsEXT.

GL_PRIMITIVES_GENERATED_EXT, GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_EXT

Accepted by the target parameter of BeginQuery, EndQuery, and GetQueryiv.

GL_RASTERIZER_DISCARD_EXT

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

GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS_EXT, GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_EXT, GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_EXT

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

GL_TRANSFORM_FEEDBACK_VARYINGS_EXT, GL_TRANSFORM_FEEDBACK_BUFFER_MODE_EXT, GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH_EXT

Accepted by the pname parameter of GetProgramiv.

Method Detail

glBindBufferRangeEXT

public static void glBindBufferRangeEXT(int target,
                                        int index,
                                        int buffer,
                                        long offset,
                                        long size)

glBindBufferOffsetEXT

public static void glBindBufferOffsetEXT(int target,
                                         int index,
                                         int buffer,
                                         long offset)

glBindBufferBaseEXT

public static void glBindBufferBaseEXT(int target,
                                       int index,
                                       int buffer)

glBeginTransformFeedbackEXT

public static void glBeginTransformFeedbackEXT(int primitiveMode)

glEndTransformFeedbackEXT

public static void glEndTransformFeedbackEXT()

glTransformFeedbackVaryingsEXT

public static void glTransformFeedbackVaryingsEXT(int program,
                                                  org.lwjgl.PointerBuffer varyings,
                                                  int bufferMode)

glTransformFeedbackVaryingsEXT

public static void glTransformFeedbackVaryingsEXT(int program,
                                                  java.lang.CharSequence[] varyings,
                                                  int bufferMode)

glTransformFeedbackVaryingsEXT

public static void glTransformFeedbackVaryingsEXT(int program,
                                                  java.lang.CharSequence varying,
                                                  int bufferMode)

glGetTransformFeedbackVaryingEXT

public static void glGetTransformFeedbackVaryingEXT(int program,
                                                    int index,
                                                    java.nio.IntBuffer length,
                                                    java.nio.IntBuffer size,
                                                    java.nio.IntBuffer type,
                                                    java.nio.ByteBuffer name)

glGetTransformFeedbackVaryingEXT

public static java.lang.String glGetTransformFeedbackVaryingEXT(int program,
                                                                int index,
                                                                int bufSize,
                                                                java.nio.IntBuffer size,
                                                                java.nio.IntBuffer type)

glGetTransformFeedbackVaryingEXT

public static java.lang.String glGetTransformFeedbackVaryingEXT(int program,
                                                                int index,
                                                                java.nio.IntBuffer size,
                                                                java.nio.IntBuffer type)

glGetIntegerIndexedvEXT

public static void glGetIntegerIndexedvEXT(int param,
                                           int index,
                                           java.nio.IntBuffer values)

glGetIntegerIndexedEXT

public static int glGetIntegerIndexedEXT(int param,
                                         int index)

glGetBooleanIndexedvEXT

public static void glGetBooleanIndexedvEXT(int param,
                                           int index,
                                           java.nio.ByteBuffer values)

glGetBooleanIndexedEXT

public static boolean glGetBooleanIndexedEXT(int param,
                                             int index)

glGetTransformFeedbackVaryingEXT

public static void glGetTransformFeedbackVaryingEXT(int program,
                                                    int index,
                                                    int[] length,
                                                    int[] size,
                                                    int[] type,
                                                    java.nio.ByteBuffer name)

Array version of: GetTransformFeedbackVaryingEXT

glGetIntegerIndexedvEXT

public static void glGetIntegerIndexedvEXT(int param,
                                           int index,
                                           int[] values)

Array version of: GetIntegerIndexedvEXT