gfx_image_convert.c

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/* bpp conversion */

#include "fb_gfx.h"

/* !!!FIXME!!! little-endian only */

/*:::::*/
void fb_image_convert_8to8(const unsigned char *src, unsigned char *dest, int w)
{
        for (; w; w--)
                *dest++ = *src++ & __fb_gfx->color_mask;
}


/*:::::*/
void fb_image_convert_8to16(const unsigned char *src, unsigned char *dest, int w)
{
        int r, g, b;
        unsigned short *d = (unsigned short *)dest;

        for (; w; w--) {
                r = __fb_gfx->device_palette[*src] & 0xFF;
                g = (__fb_gfx->device_palette[*src] >> 8) & 0xFF;
                b = (__fb_gfx->device_palette[*src] >> 16) & 0xFF;
                *d++ = (b >> 3) | ((g << 3) & 0x07E0) | ((r << 8) & 0xF800);
                src++;
        }
}


/*:::::*/
void fb_image_convert_8to32(const unsigned char *src, unsigned char *dest, int w)
{
        int r, g, b;
        unsigned int *d = (unsigned int *)dest;

        for (; w; w--) {
                r = __fb_gfx->device_palette[*src] & 0xFF;
                g = (__fb_gfx->device_palette[*src] >> 8) & 0xFF;
                b = (__fb_gfx->device_palette[*src] >> 16) & 0xFF;
                *d++ = 0xFF000000 | b | (g << 8) | (r << 16);
                src++;
        }
}

/*:::::*/
void fb_image_convert_24to16(const unsigned char *src, unsigned char *dest, int w)
{
        unsigned short *d = (unsigned short *)dest;
        for (; w; w--) {
                *d++ = (((unsigned short)src[0] << 8) & 0xF800) | (((unsigned short)src[1] << 3) & 0x07E0) | ((unsigned short)src[2] >> 3);
                src += 3;
        }
}


/*:::::*/
void fb_image_convert_24to32(const unsigned char *src, unsigned char *dest, int w)
{
        unsigned int *d = (unsigned int *)dest;

        for (; w; w--) {
                *d++ = 0xFF000000 | ((unsigned int)src[0] << 16) | ((unsigned int)src[1] << 8) | ((unsigned int)src[2]);
                src += 3;
        }
}

/*:::::*/
void fb_image_convert_32to16(const unsigned char *src, unsigned char *dest, int w)
{
        unsigned short *d = (unsigned short *)dest;
        unsigned int c;

        for (; w; w--)
        {
                c = *(unsigned int *)src & 0x00FFFFFF;
                *d++ = (unsigned short)((c >> (16+3)) | ((c >> 5) & 0x07E0) | ((c << 8) & 0xF800));
                src += sizeof( unsigned int );
        }
}

/*:::::*/
void fb_image_convert_32to32(const unsigned char *src, unsigned char *dest, int w)
{
        unsigned int *d = (unsigned int *)dest;
        unsigned int c;

        for (; w; w--)
        {
                c = *(unsigned int *)src;
                *d++ = (c >> 16) | (c & 0xFF00FF00) | (c << 16);
                src += sizeof( unsigned int );
        }
}

/*:::::*/
void fb_image_convert_24bgrto16(const unsigned char *src, unsigned char *dest, int w)
{
        unsigned short *d = (unsigned short *)dest;
        for (; w; w--) {
                *d++ = ((unsigned short)src[0] >> 3) | (((unsigned short)src[1] << 3) & 0x07E0) | (((unsigned short)src[2] << 8) & 0xF800);
                src += 3;
        }
}


/*:::::*/
void fb_image_convert_24bgrto32(const unsigned char *src, unsigned char *dest, int w)
{
        unsigned int *d = (unsigned int *)dest;

        for (; w; w--) {
                *d++ = 0xFF000000 | (*(unsigned int *)src & 0xFFFFFF);
                src += 3;
        }
}

/*:::::*/
void fb_image_convert_32bgrto16(const unsigned char *src, unsigned char *dest, int w)
{
        unsigned short *d = (unsigned short *)dest;
        const unsigned int *s = (const unsigned int *)src;

        for (; w; w--) {
                *d++ = (unsigned short)(((*s & 0xFF) >> 3) | ((*s >> 5) & 0x07E0) | ((*s >> 8) & 0xF800));
                s++;
        }
}

/*:::::*/
void fb_image_convert_32bgrto32(const unsigned char *src, unsigned char *dest, int w)
{
        fb_hMemCpy(dest, src, w << 2);
}

/*:::::*/
FBCALL void fb_GfxImageConvertRow( const unsigned char *src, int src_bpp,
                                                                   unsigned char *dest, int dst_bpp,
                                                                   int width, int isrgb )
{
        FBGFX_IMAGE_CONVERT convert = NULL;

        if (src_bpp <= 8)
        {
                switch (BYTES_PER_PIXEL( dst_bpp ))
                {
                        case 1: convert = fb_image_convert_8to8;  break;
                        case 2: convert = fb_image_convert_8to16; break;
                        case 3:
                        case 4: convert = fb_image_convert_8to32; break;
                }
        }
        else if (src_bpp == 24)
        {
                switch (BYTES_PER_PIXEL( dst_bpp ))
                {
                        case 1: return;
                        case 2: convert = (isrgb != 0? fb_image_convert_24to16: fb_image_convert_24bgrto16); break;
                        case 3:
                        case 4: convert = (isrgb != 0? fb_image_convert_24to32: fb_image_convert_24bgrto32); break;
                }
        }
        else if (src_bpp == 32)
        {
                switch (BYTES_PER_PIXEL( dst_bpp ))
                {
                        case 1: return;
                        case 2: convert = (isrgb != 0? fb_image_convert_32to16: fb_image_convert_32bgrto16); break;
                        case 3:
                        case 4: convert = (isrgb != 0? fb_image_convert_32to32: fb_image_convert_32bgrto32); break;
                }
        }
        else
                return;

        convert( src, dest, width );
}