inline void operator()(RgbTraits::address_t& scanline_address,
RgbTraits::address_t& dst_address,
IndexedTraits::address_t& src_address,
int opacity)
{
if (m_blend_mode == BLEND_MODE_COPY) {
*scanline_address = m_pal->getEntry(*src_address);
}
else {
if (*src_address != m_mask_color) {
*scanline_address = _rgba_blend_normal(*dst_address, m_pal->getEntry(*src_address), opacity);
}
else
*scanline_address = *dst_address;
}
}
static void thumbnail_render(BITMAP* bmp, const Image* image, bool has_alpha, const Palette* palette)
{
register int c, x, y;
int w, h, x1, y1;
double sx, sy, scale;
ASSERT(image != NULL);
sx = (double)image->w / (double)bmp->w;
sy = (double)image->h / (double)bmp->h;
scale = MAX(sx, sy);
w = image->w / scale;
h = image->h / scale;
w = MIN(bmp->w, w);
h = MIN(bmp->h, h);
x1 = bmp->w/2 - w/2;
y1 = bmp->h/2 - h/2;
x1 = MAX(0, x1);
y1 = MAX(0, y1);
/* with alpha blending */
if (has_alpha) {
register int c2;
rectgrid(bmp, 0, 0, bmp->w-1, bmp->h-1,
bmp->w/4, bmp->h/4);
switch (image->getPixelFormat()) {
case IMAGE_RGB:
for (y=0; y<h; y++)
for (x=0; x<w; x++) {
c = image_getpixel(image, x*scale, y*scale);
c2 = getpixel(bmp, x1+x, y1+y);
c = _rgba_blend_normal(_rgba(getr(c2), getg(c2), getb(c2), 255), c, 255);
putpixel(bmp, x1+x, y1+y, makecol(_rgba_getr(c),
_rgba_getg(c),
_rgba_getb(c)));
}
break;
case IMAGE_GRAYSCALE:
for (y=0; y<h; y++)
for (x=0; x<w; x++) {
c = image_getpixel(image, x*scale, y*scale);
c2 = getpixel(bmp, x1+x, y1+y);
c = _graya_blend_normal(_graya(getr(c2), 255), c, 255);
putpixel(bmp, x1+x, y1+y, makecol(_graya_getv(c),
_graya_getv(c),
_graya_getv(c)));
}
break;
case IMAGE_INDEXED: {
for (y=0; y<h; y++)
for (x=0; x<w; x++) {
c = image_getpixel(image, x*scale, y*scale);
if (c != 0) {
ASSERT(c >= 0 && c < palette->size());
c = palette->getEntry(MID(0, c, palette->size()-1));
putpixel(bmp, x1+x, y1+y, makecol(_rgba_getr(c),
_rgba_getg(c),
_rgba_getb(c)));
}
}
break;
}
}
}
/* without alpha blending */
else {
clear_to_color(bmp, makecol(128, 128, 128));
switch (image->getPixelFormat()) {
case IMAGE_RGB:
for (y=0; y<h; y++)
for (x=0; x<w; x++) {
c = image_getpixel(image, x*scale, y*scale);
putpixel(bmp, x1+x, y1+y, makecol(_rgba_getr(c),
_rgba_getg(c),
_rgba_getb(c)));
}
break;
case IMAGE_GRAYSCALE:
for (y=0; y<h; y++)
for (x=0; x<w; x++) {
c = image_getpixel(image, x*scale, y*scale);
putpixel(bmp, x1+x, y1+y, makecol(_graya_getv(c),
_graya_getv(c),
_graya_getv(c)));
}
break;
case IMAGE_INDEXED: {
for (y=0; y<h; y++)
for (x=0; x<w; x++) {
c = image_getpixel(image, x*scale, y*scale);
ASSERT(c >= 0 && c < palette->size());
c = palette->getEntry(MID(0, c, palette->size()-1));
putpixel(bmp, x1+x, y1+y, makecol(_rgba_getr(c),
_rgba_getg(c),
_rgba_getb(c)));
}
break;
}
}
}
}
