MHwTextureManager Class Reference
[OpenMayaRender - API module for rendering]

#include <MHwTextureManager.h>

List of all members.

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Detailed Description

Hardware Texture management.

The MHwTextureManager provides an interface for loading and using hardware textures.

Static Public Member Functions
static MStatus	glBind (const MObject &fileTextureObject, MImageFileInfo::MHwTextureType &targetType, MImageFileInfo::MImageType imageType=MImageFileInfo::kImageTypeUnknown)
static MStatus	glBind (const MPlug &fileTextureConnection, MImageFileInfo::MHwTextureType &targetType, MImageFileInfo::MImageType imageType=MImageFileInfo::kImageTypeUnknown)
static MStatus	registerTextureFile (const MString &fileName, MHwTextureFileHandle &hTexture)
static MStatus	deregisterTextureFile (const MHwTextureFileHandle &hTexture)
static MStatus	textureFile (const MHwTextureFileHandle &hTexture, MString &fileName)
static MStatus	glBind (const MHwTextureFileHandle &hTexture, MImageFileInfo::MHwTextureType &targetType, MImageFileInfo::MImageType imageType=MImageFileInfo::kImageTypeUnknown)

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Member Function Documentation

MStatus MHwTextureManager::glBind	(	const MObject &	fileTextureObject,
		MImageFileInfo::MHwTextureType &	targetType,
		MImageFileInfo::MImageType	imageType = MImageFileInfo::kImageTypeUnknown
	)			[static]

Bind the contents of a file texture node to the currently active OpenGL texture unit.

Parameters:

[in]	fileTextureObject	the file texture node to bind
[in,out]	targetType	the target type of the texture (e.g. 2D, cube map, etc). If the initial value of this argument is anything other than kHwTextureUnknown, this parameter acts as an input to specify the type you require, and the call will fail if the texture can not be bound to this type. If the initial value of this argument is kHwTextureUnknown, this parameter acts as a return value to let you know what type of texture has been bound.
[in]	imageType	the type of information you are expecting in the texture (e.g. color, normal, etc). If specified, this argument may be used to tune mipmap generation.

Returns:

• MS::kFailure if the texture cannot be bound, or is incompatible with the specified parameters
• MS::kSuccess otherwise

Examples:

hlslShader.cpp, hwManagedTextureShader.cpp, and OpenGLViewportRenderer.cpp.

MStatus MHwTextureManager::glBind	(	const MPlug &	fileTextureConnection,
		MImageFileInfo::MHwTextureType &	targetType,
		MImageFileInfo::MImageType	imageType = MImageFileInfo::kImageTypeUnknown
	)			[static]

Bind the contents of a specific file texture node attribute (e.g. color, alpha) to the currently active OpenGL texture unit. As part of this operation, the texture target will also be enabled (i.e. there is no need to call glEnable( targetType) before or after calling this method).

Parameters:

[in]	fileTextureConnection	the file texture node to bind
[in,out]	targetType	the target type of the texture (e.g. 2D, cube map, etc). If the initial value of this argument is anything other than kHwTextureUnknown, this parameter acts as an input to specify the type you require, and the call will fail if the texture can not be bound to this type. If the initial value of this argument is kHwTextureUnknown, this parameter acts as a return value to let you know what type of texture has been bound.
[in]	imageType	the type of information you are expecting in the texture (e.g. color, normal, etc). If specified, this argument may be used to tune mipmap generation.

Returns:

• MS::kFailure if the texture cannot be bound, or is incompatible with the specified parameters
• MS::kSuccess otherwise

MStatus MHwTextureManager::registerTextureFile	(	const MString &	fileName,
		MHwTextureFileHandle &	hTexture
	)			[static]

Register a named texture file. Returns a handle to a texture entry in the texture manager. The caller is responsible for calling the associated deregisterTextureFile to avoid leaking memory.

Parameters:

[in]	fileName	the texture file to register
[out]	hTexture	the output handle to a texture entry representing the given file.

Returns:

• MS::kFailure if the fileName was invalid.
• MS::kSuccess otherwise.

MStatus MHwTextureManager::deregisterTextureFile

(

const MHwTextureFileHandle &

hTexture

)

[static]

Deregisters the given handle to a texture entry in the manager. If there are no other handles to this texture entry, the texture resource will be freed.

This method assumes that a context is already set. Failing to have a valid current context when invoking this method will cause a memory leak.

Parameters:

[in]

hTexture

the texture handle to release

Status Codes:

• MS::kFailure if the texture handle was invalid.
• MS::kSuccess otherwise

MStatus MHwTextureManager::textureFile	(	const MHwTextureFileHandle &	hTexture,
		MString &	fileName
	)			[static]

Return the file name associated with a given texture file handle.

Parameters:

[in]	hTexture	the texture handle to query
[in]	fileName	the output file name

Returns:

• MS::kFailure if the texture handle was invalid.
• MS::kSuccess otherwise

MStatus MHwTextureManager::glBind	(	const MHwTextureFileHandle &	hTexture,
		MImageFileInfo::MHwTextureType &	targetType,
		MImageFileInfo::MImageType	imageType = MImageFileInfo::kImageTypeUnknown
	)			[static]

Bind the contents of a specific file to the currently active OpenGL texture unit. As part of this operation, the texture target will also be enabled (i.e. there is no need to call glEnable( targetType) before or after calling this method).

Parameters:

[in]	hTexture	the texture file handle to load
[in,out]	targetType	the target type of the texture (e.g. 2D, cube map, etc). If the initial value of this argument is anything other than kHwTextureUnknown, this parameter acts as an input to specify the type you require, and the call will fail if the texture can not be bound to this type. If the initial value of this argument is kHwTextureUnknown, this parameter acts as a return value to let you know what type of texture has been bound.
[in]	imageType	the type of information you are expecting in the texture (e.g. color, normal, etc). If specified, this argument may be used to tune mipmap generation.

Returns:

• MS::kFailure if the texture cannot be bound, or is incompatible with the specified parameters
• MS::kSuccess otherwise