Gorilla.Context.Texturing.OpenGL

Unit Gorilla.Context.Texturing.OpenGL.pas

Classes

TOpenGLPixelFormatExHelper = class ( TPixelFormatExHelper )
TOpenGLGorillaTextureWrapHelper = class ( TGorillaTextureWrapHelper )
TOpenGLGorillaTextureDataTypeHelper = class ( TGorillaTextureDataTypeHelper )
TOpenGLGorillaTexture = class ( TGorillaTexture )
TOpenGLGorillaTextureBitmap = class ( TGorillaTextureBitmap )

TOpenGLPixelFormatExHelper

Ancestors

-TPixelFormatExHelper

Members

TOpenGLGorillaTextureWrapHelper

GL_TEXTURE_2D GL_TEXTURE_3D GL_TEXTURE_CUBE_MAP

CubeMapPositiveX, CubeMapNegativeX, CubeMapPositiveY, CubeMapNegativeY, CubeMapPositiveZ, CubeMapNegativeZ

Ancestors

-TGorillaTextureWrapHelper

Members

TOpenGLGorillaTextureDataTypeHelper

Ancestors

-TGorillaTextureDataTypeHelper

Members

TOpenGLGorillaTexture

Extends the internal FMX texture class with more configuration opportunities to initialize a texture.

Remarks

The parent bitmap should be a TGorillaTextureBitmap instance, otherwise default values will be used for extended fields like WrapS, WrapT, ...

Ancestors

-TGorillaTexture

-TInterfacedPersistent

Members

Methods

public procedure GetBindingAndKind ( out ABinding : Cardinal; out AKind : Cardinal ) ; override;
Returns the graphics api value (f.e. OpenGL) for texture binding type (GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP) and texture kind (GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP)
public procedure Clear ( ) ; override;
Clear a texture directly in GPU.
public procedure GenerateMipMap ( ) ; override;
Direct instruction to generate mip maps
public function RequestTextureData ( var ABytes : TBytes; var ASize : Int64; const ALevel : Integer = $0 ) : Boolean ; override;
Allows to request texture image data from GPU.

TOpenGLGorillaTextureBitmap

Overrides the FMX texture bitmap component to allow more opportunities to configure texture (format, min-, magfilter, wrapping, datatype, ...) The basic problem with the FMX implementation is, that it uses fixed values for textures. This is not usable for usage in render passes, where a specific type of texture is expected, f.e. for shadow mapping.

Remarks

Because in render passes we create a TTextureBitmap / TGorillaTextureBitmap we need to store texture settings here, to apply them to the automatically created texture instance.

Ancestors

-TGorillaTextureBitmap

-TTextureBitmap

-TInterfacedPersistent

Members

Methods

public procedure UpdateCubeMapFace ( const ASide : TGorillaCubeMapFace; ATexture : TTexture; const ABits : Pointer; const APitch : Integer ) ; overload override;
Call this method to upload image data for a specific face of a cube map texture.
public procedure UpdateBuffer ( ABuffer : Pointer; ASize : Int64 ) ; override;
Upload complete image data for textures instead of cube map textures.
public procedure Update3DSlice ( ASlice : Integer; ABuffer : Pointer; ASize : Int64 ) ; override;