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gflResize

The gflResize function allows to resize a picture.


GFL_ERROR gflResize( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst,  
 GFL_INT32 width,  
 GFL_INT32 height,  
 GFL_UINT32 method,  
 GFL_UINT32 flags

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance. width New width. height New height. method GFL_RESIZE_QUICK Quick GFL_RESIZE_BILINEAR Bilinear

flags Reserved, must be 0.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflResizeCanvas, gflCrop, gflRotate, gflRotateFine, gflFlipHorizontal, gflFlipVertical

gflResizeCanvas

The gflResizeCanvas function allows to resize the canvas of a picture.


GFL_ERROR gflResizeCanvas( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst,  
 GFL_INT32 width,  
 GFL_INT32 height,  
 GFL_CANVASRESIZE mode,  
 const GFL_COLOR * color

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance. width New width. height New height. mode GFL_CANVASRESIZE_CENTER Center GFL_CANVASRESIZE_TOPLEFT Top-Left GFL_CANVASRESIZE_TOPRIGHT Top-Right GFL_CANVASRESIZE_BOTTOMLEFT Bottom-Left GFL_CANVASRESIZE_BOTTOMRIGHT Bottom-Right

color Pointer to a GFL_COLOR structure to receive the background color.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflResize, gflCrop, gflRotate, gflRotateFine, gflFlipHorizontal, gflFlipVertical

gflCrop

The gflCrop function crop a picture.


GFL_ERROR gflCrop( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst,  
 const GFL_RECT * rect

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance. rect Crop rectangle.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflResize, gflResizeCanvas, gflRotate, gflRotateFine, gflFlipHorizontal, gflFlipVertical

gflAutoCrop

The gflAutoCrop function performs a automatic crop on a picture.


GFL_ERROR gflAutoCrop( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst,  
 const GFL_COLOR * color, 
 GFL_INT32 tolerance

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance. color Pointer to a GFL_COLOR structure used to set the background color to search. Can be NULL, the background color is the color at x=0, y=0. tolerance Color tolerance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflCrop, gflResize, gflResizeCanvas, gflRotate, gflRotateFine, gflFlipHorizontal, gflFlipVertical

gflRotate

The gflRotate function applies a rotation on a picture.


GFL_ERROR gflRotate( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst,  
 GFL_INT32 angle,  
 const GFL_COLOR * color

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance. angle Angle of rotation in degrees. color Pointer to a GFL_COLOR structure used to set the background color. Can be NULL, the background color is (0,0,0).

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflResize, gflResizeCanvas, gflCrop, gflFlipHorizontal, gflFlipVertical, gflRotateFine,

gflRotateFine

The gflRotateFine function applies a rotation on a picture.


GFL_ERROR gflRotateFine( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst,  
 double angle,  
 const GFL_COLOR * color

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance. angle Angle of rotation in degrees. color Pointer to a GFL_COLOR structure used to set the background color. Can be NULL, the background color is (0,0,0).

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflResize, gflResizeCanvas, gflCrop, gflFlipHorizontal, gflFlipVertical, gflRotate,

gflFlipHorizontal

The gflFlipHorizontal function applies a horizontal flip on picture.


GFL_ERROR gflFlipHorizontal( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflResize, gflResizeCanvas, gflCrop, gflRotate, gflRotateFine, gflFlipVertical

gflFlipVertical

The gflFlipVertical function applies a vertical flip on picture.


GFL_ERROR gflFlipVertical( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflResize, gflResizeCanvas, gflCrop, gflRotate, gflRotateFine, gflFlipHorizontal

gflChangeColorDepth

The gflChangeColorDepth function changes the picture type.


GFL_ERROR gflChangeColorDepth( 

 GFL_BITMAP * src,  
 GFL_BITMAP ** dst,  
 GFL_MODE mode,  
 GFL_MODE_PARAMS params

);

Parameters

src Pointer to a GFL_BITMAP structure. dst Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance. mode GFL_MODE_TO_BINARY Binary (8 bits) GFL_MODE_TO_4GREY 4 Greyscale (8 bits) GFL_MODE_TO_8GREY 8 Greyscale (8 bits) GFL_MODE_TO_16GREY 16 Greyscale (8 bits) GFL_MODE_TO_32GREY 32 Greyscale (8 bits) GFL_MODE_TO_64GREY 64 Greyscale (8 bits) GFL_MODE_TO_128GREY 128 Greyscale (8 bits) GFL_MODE_TO_216GREY 216 Greyscale (8 bits) GFL_MODE_TO_256GREY 256 Greyscale (8 bits) GFL_MODE_TO_8COLORS 8 Colors (8 bits) GFL_MODE_TO_16COLORS 16 Colors (8 bits) GFL_MODE_TO_32COLORS 32 Colors (8 bits) GFL_MODE_TO_64COLORS 64 Colors (8 bits) GFL_MODE_TO_128GREY 128 Colors (8 bits) GFL_MODE_TO_216COLORS 216 Colors (8 bits) GFL_MODE_TO_256COLORS 256 Colors (8 bits) GFL_MODE_TO_RGB Red-Green-Blue (24 bits) GFL_MODE_TO_RGBA Red-Green-Blue-Alpha (32 bits) GFL_MODE_TO_BGR Blue-Green-Red (24 bits) GFL_MODE_TO_ABGR Alpha-Blue-Green-Red (32 bits) GFL_MODE_TO_BGRA Blue-Green-Red-Alpha (32 bits)

params Indicates a dither to be used for colors, greyscale & binary. GFL_MODE_NO_DITHER No dithering GFL_MODE_ADAPTIVE Adaptive without dithering GFL_MODE_PATTERN_DITHER Pattern dithering GFL_MODE_HALTONE45_DITHER HalfTone 45 dithering GFL_MODE_HALTONE90_DITHER HalfTone 90 dithering GFL_MODE_FLOYD_STEINBERG Floyd-Steinberg dithering


Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflGetColorAt, gflGetNumberOfColorsUsed

gflMerge

The gflMerge function allows to merge a list of picture.


GFL_ERROR gflMerge( 

 const GFL_BITMAP * src[],  
 const GFL_POINT origin[],  
 const GFL_UINT32 opacity[],  
 GFL_INT32  num_bitmap,  
 GFL_BITMAP ** dst

);

Parameters

src Address of an array of pointer to GFL_BITMAP structure. origin Address of an array of GFL_POINT structure, origin to insert for each picture. If NULL, origin used is (0,0). opacity Address of an array of opacity, for each picture. num_bitmap Number of picture to merge. dst Address of a pointer to a GFL_BITMAP structure.

Remark

gflMerge works only in 24 or 32bits.


Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


gflBitblt

The gflBitblt function performs a block transfert between two pictures.


GFL_ERROR gflBitblt( 

 const GFL_BITMAP * src,  
 const GFL_RECT * rect,  
 const GFL_BITMAP * dst,  
 GFL_INT32  x_dest,  
 GFL_INT32  y_dest

);

Parameters

src Pointer to a GFL_BITMAP structure, used as source. rect Pointer to a GFL_RECT structure. Area to copy. dst Pointer to a GFL_BITMAP structure, used as destination. x_dest X position in the destination picture. y_dest Y position in the destination picture.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


gflBitblt

The gflBitblt function performs a block transfert between two pictures with alpha blending.


GFL_ERROR gflBitbltEx( 

 const GFL_BITMAP * src,  
 const GFL_RECT * rect,  
 const GFL_BITMAP * dst,  
 GFL_INT32  x_dest,  
 GFL_INT32  y_dest

);

Parameters

src Pointer to a GFL_BITMAP structure, used as source. Must be 32bits. rect Pointer to a GFL_RECT structure. Area to copy. dst Pointer to a GFL_BITMAP structure, used as destination. x_dest X position in the destination picture. y_dest Y position in the destination picture.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


gflGetColorAt

The gflGetColorAt function gets the color at a position of the picture.


GFL_ERROR gflGetColorAt( 

 GFL_BITMAP * src,  
 GFL_INT32 x,  
 GFL_INT32 y,  
 GFL_COLOR * color

);

Parameters

src Pointer to a GFL_BITMAP structure. x X position. y Y position. color Pointer to a GFL_COLOR structure to obtain the result.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflGetNumberOfColorsUsed, gflSetColorAt

gflSetColorAt

The gflSetColorAt function allows to set a color at a position of the picture.


GFL_ERROR gflSetColorAt( 

 GFL_BITMAP * src,  
 GFL_INT32 x,  
 GFL_INT32 y,  
 const GFL_COLOR * color

);

Parameters

src Pointer to a GFL_BITMAP structure. x X position. y Y position. color Pointer to a GFL_COLOR structure.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


See also

gflGetNumberOfColorsUsed, gflGetColorAt

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