Abstract renderer rectangle texture buffer resource. More...
#include <TextureBufferRectangle.h>
Inheritance diagram for PLRenderer::TextureBufferRectangle:
Public Member Functions | |
| virtual PLRENDERER_API | ~TextureBufferRectangle () |
| Destructor. | |
| const PLMath::Vector2i & | GetSize () const |
| Returns the texture buffer size. | |
| virtual PLRENDERER_API PLCore::uint32 | GetNumOfPixels (PLCore::uint32 nMipmap=0) const override |
| Returns the number of pixels of a certain mipmap level. | |
| virtual PLRENDERER_API PLCore::uint32 | GetNumOfBytes (PLCore::uint32 nMipmap=0, EPixelFormat nFormat=Unknown) const override |
| Returns the number of bytes required to hold certain mipmap level texture buffer data. | |
Protected Member Functions | |
| PLRENDERER_API | TextureBufferRectangle (Renderer &cRenderer, PLCore::uint32 nFlags) |
| Constructor. | |
Protected Attributes | |
| PLMath::Vector2i | m_vSize |
Detailed Description
Abstract renderer rectangle texture buffer resource.
- Remarks:
- The hardware texturing is limited to images with power-of-two dimensions and an optional 1-texel border. But there’s also an special kind of texture buffers called ’rectangle textures’ without requiring power-of-two dimensions.
Non-power-of-two dimensioned texture buffers are useful for storing video images that do not have power-of-two dimensions. Re-sampling artifacts are avoided and less texture buffer memory may be required by using non-power-of-two dimensioned texture buffers. Non-power-of-two dimensioned texture buffers are also useful for shadow maps and window-space texturing.
However, non-power-of-two dimensioned (NPOTD) texture buffers have limitations that do not apply to power-of-two dimensioned (POT) texture buffers. NPOTD texture buffers may not use mipmap filtering; POTD texture buffers support both mipmapped and non-mipmapped filtering. NPOTD texture buffers support only the CLAMP, CLAMP TO EDGE, and CLAMP TO BORDER wrap modes; POTD texture buffers support CLAMP TO EDGE, REPEAT, CLAMP, MIRRORED REPEAT, and CLAMP TO BORDER. NPOTD texture buffers do not support an optional 1- texel border; POTD texture buffers do support an optional 1-texel border.
Constructor & Destructor Documentation
| virtual PLRENDERER_API PLRenderer::TextureBufferRectangle::~TextureBufferRectangle | ( | ) | [virtual] |
Destructor.
| PLRENDERER_API PLRenderer::TextureBufferRectangle::TextureBufferRectangle | ( | Renderer & | cRenderer, |
| PLCore::uint32 | nFlags | ||
| ) | [protected] |
Constructor.
- Parameters:
-
[in] cRenderer Owner renderer [in] nFlags Texture buffer flags (see EFlags)
Member Function Documentation
| const PLMath::Vector2i & PLRenderer::TextureBufferRectangle::GetSize | ( | ) | const [inline] |
Returns the texture buffer size.
- Returns:
- Texture buffer size
| virtual PLRENDERER_API PLCore::uint32 PLRenderer::TextureBufferRectangle::GetNumOfPixels | ( | PLCore::uint32 | nMipmap = 0 | ) | const [override, virtual] |
Returns the number of pixels of a certain mipmap level.
- Parameters:
-
[in] nMipmap Mipmap level (0 - GetNumOfMipmaps())
- Returns:
- The number of pixels of a certain mipmap level
- Note:
- If this is a cube texture, the number of pixels of all faces together will be returned
Implements PLRenderer::TextureBuffer.
| virtual PLRENDERER_API PLCore::uint32 PLRenderer::TextureBufferRectangle::GetNumOfBytes | ( | PLCore::uint32 | nMipmap = 0, |
| EPixelFormat | nFormat = Unknown |
||
| ) | const [override, virtual] |
Returns the number of bytes required to hold certain mipmap level texture buffer data.
- Parameters:
-
[in] nMipmap Mipmap level (0 - GetNumOfMipmaps()) [in] nFormat Target texture buffer pixel format, if Unknown, the format of THIS texture buffer is chosen automatically
- Returns:
- The number of bytes required to hold certain mipmap level texture buffer data
- Note:
- If 'nFormat' is a compressed format, compression is also taken into account
- If this is a cube texture, the number of bytes of all faces together will be returned
Implements PLRenderer::TextureBuffer.
Member Data Documentation
Texture buffer size
The documentation for this class was generated from the following files:
