Class TRGBAlphaFloatImage

Description

Hierarchy

Methods

Properties

Unit

CastleImages

Declaration

type TRGBAlphaFloatImage = class(TCastleImage)

Description

Image with RGBA colors using Single (4 floating-point numbers for each pixel). For high-precision RGBA images. Compared to TRGBAlphaImage, each pixel is a floating-point number, which means it is more precise and can also be above 1.0 value (though they are still in 0..1 range when reading from normal image formats).

Source: images/castleimages_class_rgb_alpha_float.inc (line 24).

Hierarchy

TObject
TEncodedImage
TCastleImage
TRGBAlphaFloatImage

Overview

Methods

Protected	`function GetColors(const X, Y, Z: Integer): TCastleColor; override;`
Protected	`procedure SetColors(const X, Y, Z: Integer; const C: TCastleColor); override;`
Public	`class function PixelSize: Cardinal; override;`
Public	`class function ColorComponentsCount: Cardinal; override;`
Public	`procedure Assign(const Source: TCastleImage); override;`
Public	`procedure InvertColors; override;`
Public	`class procedure MixColors(const OutputColor: Pointer; const Weights: TVector4; const AColors: TVector4Pointer); override;`
Public	`function PixelPtr(const X, Y: Cardinal; const Z: Cardinal = 0): PVector4;`
Public	`function RowPtr(const Y: Cardinal; const Z: Cardinal = 0): PVector4Array;`

Properties

Public	`property Pixels: PVector4 read GetPixels;`
Public	`property PixelsArray: PVector4Array read GetPixelsArray;`

Description

Methods

Protected function GetColors(const X, Y, Z: Integer): TCastleColor; override;

This item has no description.

Source: images/castleimages_class_rgb_alpha_float.inc (line 29).

Protected procedure SetColors(const X, Y, Z: Integer; const C: TCastleColor); override;

This item has no description.

Source: images/castleimages_class_rgb_alpha_float.inc (line 30).

Public class function PixelSize: Cardinal; override;

This item has no description. Showing description inherited from TCastleImage.PixelSize.

Size of TPixel in bytes for this TCastleImage descendant.

Source: images/castleimages_class_rgb_alpha_float.inc (line 32).

Public class function ColorComponentsCount: Cardinal; override;

This item has no description. Showing description inherited from TCastleImage.ColorComponentsCount.

Number of color components in TPixel.

E.g. RGB is 3 components and RGB+Alpha is 4 components, RGB+Exponent is 3 components (because it describes only Red, Green and Blue values (Exponent value is just used to correctly interpret these, it's not a 4th component)).

Source: images/castleimages_class_rgb_alpha_float.inc (line 33).

Public procedure Assign(const Source: TCastleImage); override;

This item has no description. Showing description inherited from TCastleImage.Assign.

Copy size and contents from Source. This sets our size (Width, Height and Depth) to match Source image, and copies pixels from the Source image, converting them as closely as possible. For example, converting RGBA to RGB will strip alpha channel, but copy RGB values.

When implementing descendants: the base implementation of this method in TCastleImage handles only the case when Image class equals our own class. And raises EImageAssignmentError in other cases. Override this method if you want to actually handle some conversions when assignning.

Source: images/castleimages_class_rgb_alpha_float.inc (line 34).

Public procedure InvertColors; override;

This item has no description. Showing description inherited from TCastleImage.InvertColors.

Inverts all colors (RGB or grayscale, but doesn't touch alpha channel). "Inverting" means changing color C in range [0..1] to 1-C, so black becomes white, white becomes black etc.

For descendants implementors: Override it if necessary, otherwise the default implementation in this class will raise EInternalError.

Source: images/castleimages_class_rgb_alpha_float.inc (line 35).

Public class procedure MixColors(const OutputColor: Pointer; const Weights: TVector4; const AColors: TVector4Pointer); override;

This item has no description. Showing description inherited from TCastleImage.MixColors.

Mix 4 colors, with 4 weights, into a resulting color. All 4 Colors and OutputColor must be pointers to a pixel of current image class, that is they must point to PixelSize bytes of memory.

Source: images/castleimages_class_rgb_alpha_float.inc (line 36).

Public function PixelPtr(const X, Y: Cardinal; const Z: Cardinal = 0): PVector4;

Pointer to given pixel.

Source: images/castleimages_class_rgb_alpha_float.inc (line 46).

Public function RowPtr(const Y: Cardinal; const Z: Cardinal = 0): PVector4Array;

Pointer to given row.

Source: images/castleimages_class_rgb_alpha_float.inc (line 49).