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Public Member Functions | Static Public Member Functions | Public Attributes | Friends | List of all members
ShaderBuffer Class Reference

This is a generic buffer object that lives in graphics memory. More...

`#include "shaderBuffer.h"`

Inheritance diagram for ShaderBuffer:

## Public Member Functions
| ShaderBuffer (const std::string &name, uint64_t size, UsageHint usage_hint)
| Creates an uninitialized buffer object with the given size.
| ShaderBuffer (const std::string &name, vector_uchar initial_data, UsageHint usage_hint)
| Creates a buffer object initialized with the given data.
| ~ShaderBuffer ()
| Destructor.
virtual TypeHandle | force_init_type ()
uint64_t | get_data_size_bytes () const
const unsigned char * | get_initial_data () const
| Returns a pointer to the initial buffer data, or NULL if not specified.
virtual TypeHandle | get_type () const
UsageHint | get_usage_hint () const
bool | is_prepared (PreparedGraphicsObjects *prepared_objects) const
| Returns true if the data has already been prepared or enqueued for preparation on the indicated GSG, false otherwise.
virtual void | output (std::ostream &out) const
void | prepare (PreparedGraphicsObjects *prepared_objects)
| Indicates that the data should be enqueued to be prepared in the indicated prepared_objects at the beginning of the next frame.
BufferContext * | prepare_now (PreparedGraphicsObjects *prepared_objects, GraphicsStateGuardianBase *gsg)
| Creates a context for the data on the particular GSG, if it does not already exist.
bool | release (PreparedGraphicsObjects *prepared_objects)
| Frees the data context only on the indicated object, if it exists there.
int | release_all ()
| Frees the context allocated on all objects for which the data has been declared.
virtual void | write_datagram (BamWriter *manager, Datagram &dg)
| Writes the contents of this object to the datagram for shipping out to a Bam file.
Public Member Functions inherited from TypedWritableReferenceCount
| TypedWritableReferenceCount (const TypedWritableReferenceCount &copy)
virtual ReferenceCount * | as_reference_count ()
| Returns the pointer cast to a ReferenceCount pointer, if it is in fact of that type.
void | operator= (const TypedWritableReferenceCount &copy)
Public Member Functions inherited from TypedWritable
| TypedWritable (const TypedWritable &copy)
virtual int | complete_pointers (TypedWritable **p_list, BamReader *manager)
| Receives an array of pointers, one for each time manager->read_pointer() was called in fillin().
vector_uchar | encode_to_bam_stream () const
| Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a bytes object.
bool | encode_to_bam_stream (vector_uchar &data, BamWriter *writer=nullptr) const
| Converts the TypedWritable object into a single stream of data using a BamWriter, and stores that data in the indicated string.
virtual void | finalize (BamReader *manager)
| Called by the BamReader to perform any final actions needed for setting up the object after all objects have been read and all pointers have been completed.
UpdateSeq | get_bam_modified () const
| Returns the current bam_modified counter.
void | mark_bam_modified ()
| Increments the bam_modified counter, so that this object will be invalidated and retransmitted on any open bam streams.
void | operator= (const TypedWritable &copy)
virtual bool | require_fully_complete () const
| Some objects require all of their nested pointers to have been completed before the objects themselves can be completed.
virtual void | update_bam_nested (BamWriter *manager)
| Called by the BamWriter when this object has not itself been modified recently, but it should check its nested objects for updates.
Public Member Functions inherited from TypedObject
| TypedObject (const TypedObject &copy)=default
TypedObject * | as_typed_object ()
| Returns the object, upcast (if necessary) to a TypedObject pointer.
const TypedObject * | as_typed_object () const
| Returns the object, upcast (if necessary) to a TypedObject pointer.
int | get_best_parent_from_Set (const std::set< int > &) const
int | get_type_index () const
| Returns the internal index number associated with this object's TypeHandle, a unique number for each different type.
bool | is_exact_type (TypeHandle handle) const
| Returns true if the current object is the indicated type exactly.
bool | is_of_type (TypeHandle handle) const
| Returns true if the current object is or derives from the indicated type.
TypedObject & | operator= (const TypedObject &copy)=default
Public Member Functions inherited from MemoryBase
void | operator delete (void *, void *)
void | operator delete (void *ptr)
void | operator delete[] (void *, void *)
void | operator delete[] (void *ptr)
void * | operator new (size_t size)
void * | operator new (size_t size, void *ptr)
void * | operator new[] (size_t size)
void * | operator new[] (size_t size, void *ptr)
Public Member Functions inherited from ReferenceCount
int | get_ref_count () const
WeakReferenceList * | get_weak_list () const
| Returns the WeakReferenceList associated with this ReferenceCount object.
bool | has_weak_list () const
| Returns true if this particular ReferenceCount object has a WeakReferenceList created, false otherwise.
void | local_object ()
| This function should be called, once, immediately after creating a new instance of some ReferenceCount-derived object on the stack.
void | ref () const
| Explicitly increments the reference count.
bool | ref_if_nonzero () const
| Atomically increases the reference count of this object if it is not zero.
bool | test_ref_count_integrity () const
| Does some easy checks to make sure that the reference count isn't completely bogus.
bool | test_ref_count_nonzero () const
| Does some easy checks to make sure that the reference count isn't zero, or completely bogus.
virtual bool | unref () const
| Explicitly decrements the reference count.
bool | unref_if_one () const
| Atomically decreases the reference count of this object if it is one.
WeakReferenceList * | weak_ref ()
| Adds the indicated PointerToVoid as a weak reference to this object.
void | weak_unref ()
| Removes the indicated PointerToVoid as a weak reference to this object.
Public Member Functions inherited from Namable
| Namable (const std::string &initial_name="")
void | clear_name ()
| Resets the Namable's name to empty.
const std::string & | get_name () const
bool | has_name () const
| Returns true if the Namable has a nonempty name set, false if the name is empty.
void | output (std::ostream &out) const
| Outputs the Namable.
void | set_name (const std::string &name)

## Static Public Member Functions
static TypeHandle | get_class_type ()
static void | init_type ()
static void | register_with_read_factory ()
| Tells the BamReader how to create objects of type ParamValue.
Static Public Member Functions inherited from TypedWritableReferenceCount
static TypeHandle | get_class_type ()
static void | init_type ()
static | PT (TypedWritableReferenceCount) decode_from_bam_stream(vector_uchar data
Static Public Member Functions inherited from TypedWritable
static bool | decode_raw_from_bam_stream (TypedWritable *&ptr, ReferenceCount *&ref_ptr, vector_uchar data, BamReader *reader=nullptr)
| Reads the bytes created by a previous call to encode_to_bam_stream(), and extracts the single object on those bytes.
static TypeHandle | get_class_type ()
static void | init_type ()
Static Public Member Functions inherited from TypedObject
static TypeHandle | get_class_type ()
static void | init_type ()
| This function is declared non-inline to work around a compiler bug in g++ 2.96.
Static Public Member Functions inherited from ReferenceCount
static TypeHandle | get_class_type ()
static void | init_type ()
Static Public Member Functions inherited from Namable
static TypeHandle | get_class_type ()
static void | init_type ()

## Public Attributes
| get_data_size_bytes
| Returns the buffer size in bytes.
| get_usage_hint
| Returns the buffer usage hint.
Public Attributes inherited from TypedWritableReferenceCount
static BamReader * | reader = nullptr)
Public Attributes inherited from TypedObject
| get_type
Public Attributes inherited from ReferenceCount
| get_ref_count
| Returns the current reference count.
Public Attributes inherited from Namable
| get_name
| set_name

## Friends
class | PreparedGraphicsObjects

## Additional Inherited Members
Public Types inherited from GeomEnums
enum | AnimationType { AT_none , AT_panda , AT_hardware }
enum | Contents { C_other , C_point , C_clip_point , C_vector , C_texcoord , C_color , C_index , C_morph_delta , C_matrix , C_normal }
enum | GeomRendering { GR_indexed_point = 0x00001 , GR_indexed_other = 0x10000 , GR_indexed_bits = 0x10001 , GR_point = 0x00002 , GR_point_uniform_size = 0x00004 , GR_per_point_size = 0x00008 , GR_point_perspective = 0x00010 , GR_point_aspect_ratio = 0x00020 , GR_point_scale = 0x00040 , GR_point_rotate = 0x00080 , GR_point_sprite = 0x00100 , GR_point_sprite_tex_matrix = 0x00200 , GR_point_bits = 0x003fe , GR_triangle_strip = 0x00400 , GR_triangle_fan = 0x00800 , GR_line_strip = 0x01000 , GR_composite_bits = 0x01c00 , GR_strip_cut_index = 0x20000 , GR_flat_first_vertex = 0x02000 , GR_flat_last_vertex = 0x04000 , GR_shade_model_bits = 0x06000 , GR_render_mode_wireframe = 0x40000 , GR_render_mode_point = 0x80000 , GR_adjacency = 0x100000 }
enum | NumericType { NT_uint8 , NT_uint16 , NT_uint32 , NT_packed_dcba , NT_packed_dabc , NT_float32 , NT_float64 , NT_stdfloat , NT_int8 , NT_int16 , NT_int32 , NT_packed_ufloat }
enum | PrimitiveType { PT_none , PT_polygons , PT_lines , PT_points , PT_patches }
enum | ShadeModel { SM_uniform , SM_smooth , SM_flat_first_vertex , SM_flat_last_vertex }
enum | UsageHint { UH_client , UH_stream , UH_dynamic , UH_static , UH_unspecified }
Static Public Attributes inherited from TypedWritable
static TypedWritable *const | Null = nullptr

## Detailed Description

This is a generic buffer object that lives in graphics memory.

Since
  1.10.0

Definition at line 33 of file shaderBuffer.h.

## Constructor & Destructor Documentation

## ◆ ~ShaderBuffer()

ShaderBuffer::~ShaderBuffer | ( |  | ) |

Destructor.

Definition at line 22 of file shaderBuffer.cxx.

References release_all().

## ◆ ShaderBuffer() [1/2]

ShaderBuffer::ShaderBuffer | ( | const std::string & | name,
|  | uint64_t | size,
|  | UsageHint | usage_hint )
| inline explicit

Creates an uninitialized buffer object with the given size.

For now, these parameters cannot be modified, but this may change in the future.

Definition at line 18 of file shaderBuffer.I.

## ◆ ShaderBuffer() [2/2]

ShaderBuffer::ShaderBuffer | ( | const std::string & | name,
|  | vector_uchar | initial_data,
|  | UsageHint | usage_hint )
| inline explicit

Creates a buffer object initialized with the given data.

For now, these parameters cannot be modified, but this may change in the future.

Definition at line 29 of file shaderBuffer.I.

## Member Function Documentation

## ◆ force_init_type()

virtual TypeHandle ShaderBuffer::force_init_type | ( |  | ) |
| inline virtual

Reimplemented from TypedWritableReferenceCount.

Definition at line 85 of file shaderBuffer.h.

## ◆ get_class_type()

static TypeHandle ShaderBuffer::get_class_type | ( |  | ) |
| inline static

Definition at line 86 of file shaderBuffer.h.

## ◆ get_initial_data()

const unsigned char * ShaderBuffer::get_initial_data | ( |  | ) | const
| inline

Returns a pointer to the initial buffer data, or NULL if not specified.

Definition at line 62 of file shaderBuffer.I.

## ◆ get_type()

virtual TypeHandle ShaderBuffer::get_type | ( |  | ) | const
| inline virtual

Reimplemented from TypedWritableReferenceCount.

Definition at line 82 of file shaderBuffer.h.

## ◆ init_type()

static void ShaderBuffer::init_type | ( |  | ) |
| inline static

Definition at line 89 of file shaderBuffer.h.

## ◆ is_prepared()

bool ShaderBuffer::is_prepared | ( | PreparedGraphicsObjects * | prepared_objects | ) | const

Returns true if the data has already been prepared or enqueued for preparation on the indicated GSG, false otherwise.

Definition at line 52 of file shaderBuffer.cxx.

References PreparedGraphicsObjects::is_shader_buffer_queued().

## ◆ output()

void ShaderBuffer::output | ( | std::ostream & | out | ) | const
| virtual

Definition at line 30 of file shaderBuffer.cxx.

## ◆ prepare()

void ShaderBuffer::prepare | ( | PreparedGraphicsObjects * | prepared_objects | ) |

Indicates that the data should be enqueued to be prepared in the indicated prepared_objects at the beginning of the next frame.

This will ensure the data is already loaded into the GSG if it is expected to be rendered soon.

Use this function instead of prepare_now() to preload datas from a user interface standpoint.

Definition at line 43 of file shaderBuffer.cxx.

References PreparedGraphicsObjects::enqueue_shader_buffer().

## ◆ prepare_now()

BufferContext * ShaderBuffer::prepare_now | ( | PreparedGraphicsObjects * | prepared_objects,
|  | GraphicsStateGuardianBase * | gsg )

Creates a context for the data on the particular GSG, if it does not already exist.

Returns the new (or old) BufferContext. This assumes that the GraphicsStateGuardian is the currently active rendering context and that it is ready to accept new datas. If this is not necessarily the case, you should use prepare() instead.

Normally, this is not called directly except by the GraphicsStateGuardian; a data does not need to be explicitly prepared by the user before it may be rendered.

Definition at line 76 of file shaderBuffer.cxx.

References PreparedGraphicsObjects::prepare_shader_buffer_now().

## ◆ register_with_read_factory()

void ShaderBuffer::register_with_read_factory | ( |  | ) |
| static

Tells the BamReader how to create objects of type ParamValue.

Definition at line 179 of file shaderBuffer.cxx.

References BamReader::get_factory(), and Factory< Type >::register_factory().

## ◆ release()

bool ShaderBuffer::release | ( | PreparedGraphicsObjects * | prepared_objects | ) |

Frees the data context only on the indicated object, if it exists there.

Returns true if it was released, false if it had not been prepared.

Definition at line 104 of file shaderBuffer.cxx.

References PreparedGraphicsObjects::dequeue_shader_buffer(), and PreparedGraphicsObjects::release_shader_buffer().

## ◆ release_all()

int ShaderBuffer::release_all | ( |  | ) |

Frees the context allocated on all objects for which the data has been declared.

Returns the number of contexts which have been freed.

Definition at line 124 of file shaderBuffer.cxx.

References PreparedGraphicsObjects::release_shader_buffer().

Referenced by ~ShaderBuffer().

## ◆ write_datagram()

void ShaderBuffer::write_datagram | ( | BamWriter * | manager,
|  | Datagram & | dg )
| virtual

Writes the contents of this object to the datagram for shipping out to a Bam file.

Reimplemented from TypedWritable.

Definition at line 188 of file shaderBuffer.cxx.

References Datagram::add_bool(), Datagram::add_string(), Datagram::add_uint64(), Datagram::add_uint8(), and Datagram::append_data().

## Friends And Related Symbol Documentation

## ◆ PreparedGraphicsObjects

friend class PreparedGraphicsObjects
| friend

Definition at line 100 of file shaderBuffer.h.

## Member Data Documentation

## ◆ get_data_size_bytes

uint64_t ShaderBuffer::get_data_size_bytes
| inline

Returns the buffer size in bytes.

Definition at line 51 of file shaderBuffer.h.

## ◆ get_usage_hint

GeomEnums::UsageHint ShaderBuffer::get_usage_hint
| inline

Returns the buffer usage hint.

Definition at line 52 of file shaderBuffer.h.

The documentation for this class was generated from the following files:

- panda/src/gobj/shaderBuffer.h
- panda/src/gobj/shaderBuffer.cxx
- panda/src/gobj/shaderBuffer.I