Image_api

Functions
unsigned int *	GrPaletteConversion (const tContext *pContext, const tImage *pBitmap)
void	GrImageDraw (const tContext *pContext, const tImage *pBitmap, int lX, int lY)

Detailed Description

Function Documentation

unsigned int* GrPaletteConversion	(	const tContext *	pContext,
		const tImage *	pBitmap
	)

Converts the bitmap image palette.

Parameters

pContext	is a pointer to the drawing context to use.
pBitmap	is a pointer to the image.

This function converts the palette of a bitmap image. The image palette is in 24 bit RGB form, and this function converts that to a format to be sent to the LCD using DpyColorTranslate function. The converted palette is contained in a global buffer while the original image palette remains unchanged.

Returns

is the address of the global buffer containing the converted palette.

References DpyColorTranslate, tImage::NumColors, tContext::pDisplay, and tImage::pPalette.

Referenced by GrImageDraw().

void GrImageDraw	(	const tContext *	pContext,
		const tImage *	pBitmap,
		int	lX,
		int	lY
	)

Draws a bitmap image.

Parameters

pContext	is a pointer to the drawing context to use.
pucImage	is a pointer to the image to draw.
lX	is the X coordinate of the upper left corner of the image.
lY	is the Y coordinate of the upper left corner of the image.

This function draws a bitmap image. The image may be 1 bit per pixel, 4 bits per pixel or 8 bits per pixel (using a palette supplied in the image data). It can be uncompressed data, or it can be compressed using several different compression types. Compression options are 4-bit run length encoding, 8-bit run length encoding, and a custom run length encoding variation written for complex 8-bit per pixel images.

Returns

None.

References tImage::BPP, DpyPixelDraw, DpyPixelDrawMultiple, GrPaletteConversion(), tContext::pDisplay, tImage::pPixel, tContext::sClipRegion, tRectangle::sXMax, tRectangle::sXMin, tRectangle::sYMax, tRectangle::sYMin, tImage::XSize, and tImage::YSize.