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Classes for managing framebuffer.

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Vladimír Vondruš 14 years ago
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  1. 2
      src/CMakeLists.txt
  2. 40
      src/Framebuffer.cpp
  3. 370
      src/Framebuffer.h
  4. 52
      src/Renderbuffer.cpp
  5. 155
      src/Renderbuffer.h

2
src/CMakeLists.txt
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@ -14,9 +14,11 @@ set(Magnum_SRCS
BufferedImage.cpp BufferedImage.cpp
Camera.cpp Camera.cpp
Image.cpp Image.cpp
Framebuffer.cpp
IndexedMesh.cpp IndexedMesh.cpp
Light.cpp Light.cpp
Mesh.cpp Mesh.cpp
Renderbuffer.cpp
Scene.cpp Scene.cpp
Shader.cpp Shader.cpp
SizeTraits.cpp SizeTraits.cpp

40
src/Framebuffer.cpp
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/*
Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz>
This file is part of Magnum.
Magnum is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License version 3
only, as published by the Free Software Foundation.
Magnum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License version 3 for more details.
*/
#include "Framebuffer.h"
namespace Magnum {
void Framebuffer::mapDefaultForDraw(std::initializer_list<DefaultDrawAttachment> attachments) {
GLenum* _attachments = new GLenum[attachments.size()];
for(auto it = attachments.begin(); it != attachments.end(); ++it)
_attachments[it-attachments.begin()] = static_cast<GLenum>(*it);
bindDefault(Target::Draw);
glDrawBuffers(attachments.size(), _attachments);
delete[] _attachments;
}
void Framebuffer::mapForDraw(std::initializer_list<int> colorAttachments) {
GLenum* attachments = new GLenum[colorAttachments.size()];
for(auto it = colorAttachments.begin(); it != colorAttachments.end(); ++it)
attachments[it-colorAttachments.begin()] = *it + GL_COLOR_ATTACHMENT0;
bind(Target::Draw);
glDrawBuffers(colorAttachments.size(), attachments);
delete[] attachments;
}
}

370
src/Framebuffer.h
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#ifndef Magnum_Framebuffer_h
#define Magnum_Framebuffer_h
/*
Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz>
This file is part of Magnum.
Magnum is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License version 3
only, as published by the Free Software Foundation.
Magnum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License version 3 for more details.
*/
/** @file
* @brief Class Magnum::Framebuffer
*/
#include "CubeMapTexture.h"
#include "Renderbuffer.h"
namespace Magnum {
/**
@brief Framebuffer
*/
class MAGNUM_EXPORT Framebuffer {
Framebuffer(const Framebuffer& other) = delete;
Framebuffer(Framebuffer&& other) = delete;
Framebuffer& operator=(const Framebuffer& other) = delete;
Framebuffer& operator=(Framebuffer&& other) = delete;
public:
/** @brief %Framebuffer target */
enum class Target: GLenum {
Read = GL_READ_FRAMEBUFFER, /**< For reading only. */
Draw = GL_DRAW_FRAMEBUFFER, /**< For drawing only. */
ReadDraw = GL_FRAMEBUFFER /**< For both reading and drawing. */
};
/** @brief Draw attachment for default framebuffer */
enum class DefaultDrawAttachment: GLenum {
None = GL_NONE, /**< Don't use the output. */
BackLeft = GL_BACK_LEFT, /**< Write output to back left framebuffer. */
BackRight = GL_BACK_RIGHT, /**< Write output to back right framebuffer. */
FrontLeft = GL_FRONT_LEFT, /**< Write output to front left framebuffer. */
FrontRight = GL_FRONT_RIGHT /**< Write output to front right framebuffer. */
};
/** @brief Read attachment for default framebuffer */
enum class DefaultReadAttachment: GLenum {
FrontLeft = GL_FRONT_LEFT, /**< Read from front left framebuffer. */
FrontRight = GL_FRONT_RIGHT, /**< Read from front right framebuffer. */
BackLeft = GL_BACK_LEFT, /**< Read from back left framebuffer. */
BackRight = GL_BACK_RIGHT, /**< Read from back right framebuffer. */
Left = GL_LEFT, /**< Read from left framebuffers. */
Right = GL_RIGHT, /**< Read from right framebuffers. */
Front = GL_FRONT, /**< Read from front framebuffers. */
Back = GL_BACK, /**< Read from back framebuffers. */
FrontAndBack = GL_FRONT_AND_BACK /**< Read from front and back framebuffers. */
};
/** @brief Attachment for depth/stencil part of fragment shader output */
enum class DepthStencilAttachment: GLenum {
Depth = GL_DEPTH_ATTACHMENT, /**< Depth output only. */
Stencil = GL_STENCIL_ATTACHMENT, /**< Stencil output only. */
DepthStencil = GL_DEPTH_STENCIL_ATTACHMENT /**< Both depth and stencil output. */
};
/**
* @brief Output mask for blitting
*
* Specifies which data are copied when performing blit operation
* using blit().
*/
enum class BlitMask: GLbitfield {
Color = GL_COLOR_BUFFER_BIT, /**< Color only. */
Depth = GL_DEPTH_BUFFER_BIT, /**< Depth value only. */
Stencil = GL_STENCIL_BUFFER_BIT, /**< Stencil value only. */
/** Color and depth value. */
ColorDepth = GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT,
/** Color and stencil value. */
ColorStencil = GL_COLOR_BUFFER_BIT|GL_STENCIL_BUFFER_BIT,
/** Depth and stencil value */
DepthStencil = GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT,
/** Color, depth and stencil value. */
ColorDepthStencil = GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT
};
/**
* @brief Bind default framebuffer to given target
* @param target %Target
*/
inline static void bindDefault(Target target) {
glBindFramebuffer(static_cast<GLenum>(target), 0);
}
/**
* @brief Map given attachments of default framebuffer for drawing
* @param attachments Default attachments. If any value is
* DefaultAttachment::None, given output is not used.
*
* If used for mapping output of fragment shader, the order must be as
* specified by the shader (see AbstractShaderProgram documentation).
* If used for blit(), the order is not important. Each used attachment
* should have either renderbuffer or texture attached for writing to
* work properly.
* @see mapForDraw(), mapDefaultForRead()
*/
static void mapDefaultForDraw(std::initializer_list<DefaultDrawAttachment> attachments);
/**
* @brief Map given attachment of default framebuffer for reading
* @param attachment Default attachment
*
* Each used attachment should have either renderbuffer or texture
* attached to work properly.
* @see mapForRead(), mapDefaultForDraw()
*/
inline static void mapDefaultForRead(DefaultReadAttachment attachment) {
bindDefault(Target::Read);
glReadBuffer(static_cast<GLenum>(attachment));
}
/**
* @brief Copy block of pixels from read to draw framebuffer
* @param bottomLeft Bottom left coordinates of source rectangle
* @param topRight Top right coordinates of source rectangle
* @param destinationBottomLeft Bottom left coordinates of destination rectangle
* @param destinationTopRight Top right coordinates of destination
* rectangle
* @param blitMask Blit mask
* @param filter Interpolation applied if the image is
* stretched
*
* See mapForRead() / mapDefaultForRead() and mapForDraw() /
* mapDefaultForDraw() for binding particular framebuffer for reading
* and drawing. If multiple attachments are specified in mapForDraw()
* / mapDefaultForDraw(), the data are written to each of them.
*/
inline static void blit(const Math::Vector2<GLint>& bottomLeft, const Math::Vector2<GLint>& topRight, const Math::Vector2<GLint>& destinationBottomLeft, const Math::Vector2<GLint>& destinationTopRight, BlitMask blitMask, AbstractTexture::Filter filter) {
glBlitFramebuffer(bottomLeft.x(), bottomLeft.y(), topRight.x(), topRight.y(), destinationBottomLeft.x(), destinationBottomLeft.y(), destinationTopRight.x(), destinationTopRight.y(), static_cast<GLbitfield>(blitMask), static_cast<GLenum>(filter));
}
/**
* @brief Copy block of pixels from read to draw framebuffer
* @param bottomLeft Bottom left coordinates of source and
* destination rectangle
* @param topRight Top right coordinates of source and
* destination rectangle
* @param blitMask Blit mask
*
* Convenience function when source rectangle is the same as
* destination rectangle. As the image is copied pixel-by-pixel,
* no interpolation is needed and thus
* AbstractTexture::Filter::NearestNeighbor filtering is used by
* default.
*/
inline static void blit(const Math::Vector2<GLint>& bottomLeft, const Math::Vector2<GLint>& topRight, BlitMask blitMask) {
glBlitFramebuffer(bottomLeft.x(), bottomLeft.y(), topRight.x(), topRight.y(), bottomLeft.x(), bottomLeft.y(), topRight.x(), topRight.y(), static_cast<GLbitfield>(blitMask), static_cast<GLenum>(AbstractTexture::Filter::NearestNeighbor));
}
/**
* @brief Constructor
*
* Generates new OpenGL framebuffer.
*/
inline Framebuffer() { glGenFramebuffers(1, &framebuffer); }
/**
* @brief Destructor
*
* Deletes associated OpenGL framebuffer.
*/
inline ~Framebuffer() { glDeleteFramebuffers(1, &framebuffer); }
/** @brief Bind framebuffer */
inline void bind(Target target) {
glBindFramebuffer(static_cast<GLenum>(target), framebuffer);
}
/**
* @brief Map given color attachments of current framebuffer for drawing
* @param colorAttachments Color attachment IDs. If any value is -1,
* given output is not used.
*
* If used for mapping output of fragment shader, the order must be as
* specified by the shader (see AbstractShaderProgram documentation).
* If used for blit(), the order is not important. Each used attachment
* should have either renderbuffer or texture attached for writing to
* work properly.
* @see mapDefaultForDraw(), mapForRead()
*/
void mapForDraw(std::initializer_list<int> colorAttachments);
/**
* @brief Map given color attachment of current framebuffer for reading
* @param colorAttachment Color attachment ID
*
* The color attachment should have either renderbuffer or texture
* attached for reading to work properly.
* @see mapDefaultForRead(), mapForDraw()
*/
inline void mapForRead(unsigned int colorAttachment) {
bind(Target::Read);
glReadBuffer(GL_COLOR_ATTACHMENT0 + colorAttachment);
}
/**
* @brief Attach renderbuffer to given framebuffer depth/stencil attachment
* @param target %Target
* @param depthStencilAttachment Depth/stencil attachment
* @param renderbuffer Renderbuffer
*/
inline void attachRenderbuffer(Target target, DepthStencilAttachment depthStencilAttachment, Renderbuffer* renderbuffer) {
/** @todo Check for internal format compatibility */
bind(target);
glFramebufferRenderbuffer(static_cast<GLenum>(target), static_cast<GLenum>(depthStencilAttachment), GL_RENDERBUFFER, renderbuffer->id());
}
/**
* @brief Attach renderbuffer to given framebuffer color attachment
* @param target %Target
* @param colorAttachment Color attachment ID (number between 0 and 15)
* @param renderbuffer Renderbuffer
*/
inline void attachRenderbuffer(Target target, unsigned int colorAttachment, Renderbuffer* renderbuffer) {
/** @todo Check for internal format compatibility */
bind(target);
glFramebufferRenderbuffer(static_cast<GLenum>(target), GL_COLOR_ATTACHMENT0 + colorAttachment, GL_RENDERBUFFER, renderbuffer->id());
}
/**
* @brief Attach 1D texture to given framebuffer depth/stencil attachment
* @param target %Target
* @param depthStencilAttachment Depth/stencil attachment
* @param texture 1D texture
* @param mipLevel Mip level
*/
inline void attachTexture1D(Target target, DepthStencilAttachment depthStencilAttachment, Texture1D* texture, GLint mipLevel) {
/** @todo Check for internal format compatibility */
/** @todo Check for texture target compatibility */
bind(target);
glFramebufferTexture1D(static_cast<GLenum>(target), static_cast<GLenum>(depthStencilAttachment), static_cast<GLenum>(texture->target()), texture->id(), mipLevel);
}
/**
* @brief Attach 1D texture to given framebuffer color attachment
* @param target %Target
* @param colorAttachment Color attachment ID (number between 0 and 15)
* @param texture 1D texture
* @param mipLevel Mip level
*/
inline void attachTexture1D(Target target, unsigned int colorAttachment, Texture1D* texture, GLint mipLevel) {
/** @todo Check for internal format compatibility */
/** @todo Check for texture target compatibility */
bind(target);
glFramebufferTexture1D(static_cast<GLenum>(target), GL_COLOR_ATTACHMENT0 + colorAttachment, static_cast<GLenum>(texture->target()), texture->id(), mipLevel);
}
/**
* @brief Attach 2D texture to given framebuffer depth/stencil attachment
* @param target %Target
* @param depthStencilAttachment Depth/stencil attachment
* @param texture 2D texture
* @param mipLevel Mip level. For rectangle textures it
* should be always 0.
*
* @see attachCubeMapTexture()
*/
inline void attachTexture2D(Target target, DepthStencilAttachment depthStencilAttachment, Texture2D* texture, GLint mipLevel) {
/** @todo Check for internal format compatibility */
/** @todo Check for texture target compatibility */
bind(target);
glFramebufferTexture2D(static_cast<GLenum>(target), static_cast<GLenum>(depthStencilAttachment), static_cast<GLenum>(texture->target()), texture->id(), mipLevel);
}
/**
* @brief Attach 2D texture to given framebuffer color attachment
* @param target %Target
* @param colorAttachment Color attachment ID (number between 0 and 15)
* @param texture 2D texture
* @param mipLevel Mip level. For rectangle textures it
* should be always 0.
*
* @see attachCubeMapTexture()
*/
inline void attachTexture2D(Target target, unsigned int colorAttachment, Texture2D* texture, GLint mipLevel) {
/** @todo Check for internal format compatibility */
/** @todo Check for texture target compatibility */
bind(target);
glFramebufferTexture2D(static_cast<GLenum>(target), GL_COLOR_ATTACHMENT0 + colorAttachment, static_cast<GLenum>(texture->target()), texture->id(), mipLevel);
}
/**
* @brief Attach cube map texture to given framebuffer depth/stencil attachment
* @param target %Target
* @param depthStencilAttachment Depth/stencil attachment
* @param texture Cube map texture
* @param coordinate Cube map coordinate
* @param mipLevel Mip level
*
* @see attachTexture2D()
*/
inline void attachCubeMapTexture(Target target, DepthStencilAttachment depthStencilAttachment, CubeMapTexture* texture, CubeMapTexture::Coordinate coordinate, GLint mipLevel) {
/** @todo Check for internal format compatibility */
bind(target);
glFramebufferTexture2D(static_cast<GLenum>(target), static_cast<GLenum>(depthStencilAttachment), static_cast<GLenum>(coordinate), texture->id(), mipLevel);
}
/**
* @brief Attach cube map texture to given framebuffer color attachment
* @param target %Target
* @param colorAttachment Color attachment ID (number between 0 and 15)
* @param texture Cube map texture
* @param coordinate Cube map coordinate
* @param mipLevel Mip level
*
* @see attachTexture2D()
*/
inline void attachCubeMapTexture(Target target, unsigned int colorAttachment, CubeMapTexture* texture, CubeMapTexture::Coordinate coordinate, GLint mipLevel) {
/** @todo Check for internal format compatibility */
bind(target);
glFramebufferTexture2D(static_cast<GLenum>(target), GL_COLOR_ATTACHMENT0 + colorAttachment, static_cast<GLenum>(coordinate), texture->id(), mipLevel);
}
/**
* @brief Attach 3D texture to given framebuffer depth/stencil attachment
* @param target %Target
* @param depthStencilAttachment Depth/stencil attachment
* @param texture 3D texture
* @param mipLevel Mip level
* @param layer Layer of 2D image within a 3D texture
*/
inline void attachTexture3D(Target target, DepthStencilAttachment depthStencilAttachment, Texture3D* texture, GLint mipLevel, GLint layer) {
/** @todo Check for internal format compatibility */
/** @todo Check for texture target compatibility */
bind(target);
glFramebufferTexture3D(static_cast<GLenum>(target), static_cast<GLenum>(depthStencilAttachment), static_cast<GLenum>(texture->target()), texture->id(), mipLevel, layer);
}
/**
* @brief Attach 3D texture to given framebuffer color attachment
* @param target %Target
* @param colorAttachment Color attachment ID (number between 0 and 15)
* @param texture 3D texture
* @param mipLevel Mip level
* @param layer Layer of 2D image within a 3D texture.
*/
inline void attachTexture3D(Target target, unsigned int colorAttachment, Texture3D* texture, GLint mipLevel, GLint layer) {
/** @todo Check for internal format compatibility */
/** @todo Check for texture target compatibility */
bind(target);
glFramebufferTexture3D(static_cast<GLenum>(target), GL_COLOR_ATTACHMENT0 + colorAttachment, static_cast<GLenum>(texture->target()), texture->id(), mipLevel, layer);
}
private:
GLuint framebuffer;
};
}
#endif

52
src/Renderbuffer.cpp
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/*
Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz>
This file is part of Magnum.
Magnum is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License version 3
only, as published by the Free Software Foundation.
Magnum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License version 3 for more details.
*/
#include "Renderbuffer.h"
namespace Magnum {
Renderbuffer::InternalFormat::InternalFormat(Components components, ComponentType type) {
#define internalFormatSwitch(c) switch(type) { \
case ComponentType::UnsignedByte: \
internalFormat = GL_##c##8UI; break; \
case ComponentType::Byte: \
internalFormat = GL_##c##8I; break; \
case ComponentType::UnsignedShort: \
internalFormat = GL_##c##16UI; break; \
case ComponentType::Short: \
internalFormat = GL_##c##16I; break; \
case ComponentType::UnsignedInt: \
internalFormat = GL_##c##32UI; break; \
case ComponentType::Int: \
internalFormat = GL_##c##32I; break; \
case ComponentType::Half: \
internalFormat = GL_##c##16F; break; \
case ComponentType::Float: \
internalFormat = GL_##c##32F; break; \
case ComponentType::NormalizedUnsignedByte: \
internalFormat = GL_##c##8; break; \
case ComponentType::NormalizedUnsignedShort: \
internalFormat = GL_##c##16; break; \
}
if(components == Components::Red)
internalFormatSwitch(R)
else if(components == Components::RedGreen)
internalFormatSwitch(RG)
else if(components == Components::RGBA)
internalFormatSwitch(RGBA)
#undef internalFormatSwitch
}
}

155
src/Renderbuffer.h
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#ifndef Magnum_Renderbuffer_h
#define Magnum_Renderbuffer_h
/*
Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz>
This file is part of Magnum.
Magnum is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License version 3
only, as published by the Free Software Foundation.
Magnum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License version 3 for more details.
*/
/** @file
* @brief Class Magnum::Renderbuffer
*/
#include "Magnum.h"
namespace Magnum {
/**
@brief Renderbuffer
Attachable to Framebuffer as render target.
*/
class Renderbuffer {
Renderbuffer(const Renderbuffer& other) = delete;
Renderbuffer(Renderbuffer&& other) = delete;
Renderbuffer& operator=(const Renderbuffer& other) = delete;
Renderbuffer& operator=(Renderbuffer&& other) = delete;
public:
/** @{ @name Internal renderbuffer formats */
/**
* @copydoc AbstractTexture::Components
*
* Like AbstractTexture::Components, without three-component RGB.
*/
enum class Components {
Red, RedGreen, RGBA
};
/**
* @copydoc AbstractTexture::ComponentType
*
* Like AbstractTexture::ComponentType, without normalized signed
* types.
*/
enum class ComponentType {
UnsignedByte, Byte, UnsignedShort, Short, UnsignedInt, Int, Half,
Float, NormalizedUnsignedByte, NormalizedUnsignedShort
};
/**
* @copydoc AbstractTexture::Format
*
* Like AbstractTexture::Format without
* AbstractTexture::Format::RGB9Intensity5, three-component and
* compressed formats.
*/
enum class Format: GLenum {
Red = GL_RED, RedGreen = GL_RG, RGBA = GL_RGBA, BGRA = GL_BGRA,
SRGBA = GL_SRGB8_ALPHA8,
RGB10Alpha2 = GL_RGB10_A2, RGB10AlphaUnsigned2 = GL_RGB10_A2UI,
RGB5Alpha1 = GL_RGB5_A1, RGBA4 = GL_RGBA4,
RFloat11GFloat11BFloat10 = GL_R11F_G11F_B10F,
#if defined(GL_RGB565) || defined(DOXYGEN_GENERATING_OUTPUT)
RGB565 = GL_RGB565,
#endif
Depth = GL_DEPTH_COMPONENT, DepthStencil = GL_DEPTH_STENCIL,
Depth16 = GL_DEPTH_COMPONENT16, Depth24 = GL_DEPTH_COMPONENT24,
DepthFloat = GL_DEPTH_COMPONENT32F,
Depth24Stencil8 = GL_DEPTH24_STENCIL8,
DepthFloatStencil8 = GL_DEPTH32F_STENCIL8
};
/** @copydoc AbstractTexture::InternalFormat */
class InternalFormat {
public:
/** @copydoc AbstractTexture::InternalFormat::InternalFormat(AbstractTexture::Components, AbstractTexture::ComponentType) */
InternalFormat(Components components, ComponentType type);
/** @copydoc AbstractTexture::InternalFormat::InternalFormat(AbstractTexture::Format) */
inline constexpr InternalFormat(Format format): internalFormat(static_cast<GLint>(format)) {}
/** @brief OpenGL internal format ID */
/* doxygen: @copydoc AbstractTexture::InternalFormat::operator GLint() doesn't work */
inline constexpr operator GLint() const { return internalFormat; }
private:
GLint internalFormat;
};
/*@}*/
/**
* @brief Constructor
*
* Generates new OpenGL renderbuffer.
*/
Renderbuffer() {
glGenRenderbuffers(1, &renderbuffer);
}
/**
* @brief Destructor
*
* Deletes associated OpenGL renderbuffer.
*/
~Renderbuffer() {
glDeleteRenderbuffers(1, &renderbuffer);
}
/** @brief OpenGL internal renderbuffer ID */
inline GLuint id() const { return renderbuffer; }
/** @brief Bind renderbuffer */
inline void bind() {
glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
}
/**
* @brief Set renderbuffer storage
* @param internalFormat Internal format
* @param size Renderbuffer size
*/
inline void setStorage(InternalFormat internalFormat, const Math::Vector2<GLsizei>& size) {
bind();
glRenderbufferStorage(GL_RENDERBUFFER, static_cast<GLenum>(internalFormat), size.x(), size.y());
}
private:
GLuint renderbuffer;
};
/** @copydoc operator|(AbstractTexture::Components, AbstractTexture::ComponentType) */
inline Renderbuffer::InternalFormat operator|(Renderbuffer::Components components, Renderbuffer::ComponentType type) {
return Renderbuffer::InternalFormat(components, type);
}
/** @copydoc operator|(AbstractTexture::ComponentType, AbstractTexture::Components) */
inline Renderbuffer::InternalFormat operator|(Renderbuffer::ComponentType type, Renderbuffer::Components components) {
return Renderbuffer::InternalFormat(components, type);
}
}
#endif
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