Package org.lwjgl.opengl

Class EXTTransformFeedback

java.lang.Object
org.lwjgl.opengl.EXTTransformFeedback
public class EXTTransformFeedback extends 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 Details

    • GL_TRANSFORM_FEEDBACK_BUFFER_EXT

      public static final int GL_TRANSFORM_FEEDBACK_BUFFER_EXT
      Accepted by the target parameters of BindBuffer, BufferData, BufferSubData, MapBuffer, UnmapBuffer, GetBufferSubData, GetBufferPointerv, BindBufferRangeEXT, BindBufferOffsetEXT and BindBufferBaseEXT.
      See Also:

    • GL_TRANSFORM_FEEDBACK_BUFFER_START_EXT

      public static final int GL_TRANSFORM_FEEDBACK_BUFFER_START_EXT
      Accepted by the param parameter of GetIntegerIndexedvEXT and GetBooleanIndexedvEXT.
      See Also:

    • GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_EXT

      public static final int GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_EXT
      Accepted by the param parameter of GetIntegerIndexedvEXT and GetBooleanIndexedvEXT.
      See Also:

    • GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_EXT

      public static final 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.
      See Also:

    • GL_INTERLEAVED_ATTRIBS_EXT

      public static final int GL_INTERLEAVED_ATTRIBS_EXT
      Accepted by the bufferMode parameter of TransformFeedbackVaryingsEXT.
      See Also:

    • GL_SEPARATE_ATTRIBS_EXT

      public static final int GL_SEPARATE_ATTRIBS_EXT
      Accepted by the bufferMode parameter of TransformFeedbackVaryingsEXT.
      See Also:

    • GL_PRIMITIVES_GENERATED_EXT

      public static final int GL_PRIMITIVES_GENERATED_EXT
      Accepted by the target parameter of BeginQuery, EndQuery, and GetQueryiv.
      See Also:

    • GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_EXT

      public static final int GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_EXT
      Accepted by the target parameter of BeginQuery, EndQuery, and GetQueryiv.
      See Also:

    • GL_RASTERIZER_DISCARD_EXT

      public static final 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.
      See Also:

    • GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS_EXT

      public static final int GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS_EXT
      Accepted by the pname parameter of GetBooleanv, GetDoublev, GetIntegerv, and GetFloatv.
      See Also:

    • GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_EXT

      public static final int GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_EXT
      Accepted by the pname parameter of GetBooleanv, GetDoublev, GetIntegerv, and GetFloatv.
      See Also:

    • GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_EXT

      public static final int GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_EXT
      Accepted by the pname parameter of GetBooleanv, GetDoublev, GetIntegerv, and GetFloatv.
      See Also:

    • GL_TRANSFORM_FEEDBACK_VARYINGS_EXT

      public static final int GL_TRANSFORM_FEEDBACK_VARYINGS_EXT
      Accepted by the pname parameter of GetProgramiv.
      See Also:

    • GL_TRANSFORM_FEEDBACK_BUFFER_MODE_EXT

      public static final int GL_TRANSFORM_FEEDBACK_BUFFER_MODE_EXT
      Accepted by the pname parameter of GetProgramiv.
      See Also:

    • GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH_EXT

      public static final int GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH_EXT
      Accepted by the pname parameter of GetProgramiv.
      See Also:

  • Method Details

    • 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()

    • nglTransformFeedbackVaryingsEXT

      public static void nglTransformFeedbackVaryingsEXT(int program, int count, long varyings, int bufferMode)

    • glTransformFeedbackVaryingsEXT

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

    • glTransformFeedbackVaryingsEXT

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

    • glTransformFeedbackVaryingsEXT

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

    • nglGetTransformFeedbackVaryingEXT

      public static void nglGetTransformFeedbackVaryingEXT(int program, int index, int bufSize, long length, long size, long type, long name)

    • glGetTransformFeedbackVaryingEXT

      public static void glGetTransformFeedbackVaryingEXT(int program, int index, @Nullable IntBuffer length, IntBuffer size, IntBuffer type, ByteBuffer name)

    • glGetTransformFeedbackVaryingEXT

      public static String glGetTransformFeedbackVaryingEXT(int program, int index, int bufSize, IntBuffer size, IntBuffer type)

    • glGetTransformFeedbackVaryingEXT

      public static String glGetTransformFeedbackVaryingEXT(int program, int index, IntBuffer size, IntBuffer type)

    • nglGetIntegerIndexedvEXT

      public static void nglGetIntegerIndexedvEXT(int target, int index, long data)

    • glGetIntegerIndexedvEXT

      public static void glGetIntegerIndexedvEXT(int target, int index, IntBuffer data)

    • glGetIntegerIndexedEXT

      public static int glGetIntegerIndexedEXT(int target, int index)

    • nglGetBooleanIndexedvEXT

      public static void nglGetBooleanIndexedvEXT(int target, int index, long data)

    • glGetBooleanIndexedvEXT

      public static void glGetBooleanIndexedvEXT(int target, int index, ByteBuffer data)

    • glGetBooleanIndexedEXT

      public static boolean glGetBooleanIndexedEXT(int target, int index)

    • glGetTransformFeedbackVaryingEXT

      public static void glGetTransformFeedbackVaryingEXT(int program, int index, @Nullable int[] length, int[] size, int[] type, ByteBuffer name)
      Array version of: GetTransformFeedbackVaryingEXT

    • glGetIntegerIndexedvEXT

      public static void glGetIntegerIndexedvEXT(int target, int index, int[] data)
      Array version of: GetIntegerIndexedvEXT