// 矩形を塗りつぶす
static void fill_rect16(struct GBUFFER *self, int x, int y, int w, int h, COLOR32 color)
{
if (w == 0 && h == 0) {
w = self->w;
h = self->h;
}
x = MAXMIN(0, x, self->w - 1);
y = MAXMIN(0, y, self->h - 1);
int max_w = self->w - x;
int max_h = self->h - y;
w = MAXMIN(0, w, max_w);
h = MAXMIN(0, h, max_h);
COLOR16 *buf = (COLOR16 *) self->buf;
buf = &buf[y * self->w + x];
COLOR16 *buf1 = buf; // 1行目
COLOR16 col = RGB32_TO_16(color);
/* 1行目を塗りつぶす */
for (int px = 0; px < w; px++) {
buf1[px] = col;
}
buf += self->w;
/* 2行目以降は1行目のコピー */
for (int line = 1; line < h; line++) {
memcpy(buf, buf1, w * sizeof (COLOR16));
buf += self->w;
}
}
static void blit16(struct GBUFFER *self, int src_x, int src_y, int w, int h,
struct GBUFFER *dst, int dst_x, int dst_y, int op)
{
// ---- 範囲チェック＆修正
int src_max_w = self->w - src_x;
int src_max_h = self->h - src_y;
int dst_max_w = dst->w - dst_x;
int dst_max_h = dst->h - dst_y;
src_x = MAXMIN(0, src_x, self->w - 1);
src_y = MAXMIN(0, src_y, self->h - 1);
dst_x = MAXMIN(0, dst_x, dst->w - 1);
dst_y = MAXMIN(0, dst_y, dst->h - 1);
if (self == dst && src_x == dst_x && src_y == dst_y) {
return;
}
w = MIN(w, MIN(src_max_w, dst_max_w));
h = MIN(h, MIN(src_max_h, dst_max_h));
// ---- 本体
switch (op) {
case OP_SRC_COPY:
blit_src_copy16(self, src_x, src_y, w, h, dst, dst_x, dst_y);
break;
case OP_SRC_INVERT:
blit_src_invert16(self, src_x, src_y, w, h, dst, dst_x, dst_y);
break;
}
}
// Red, Green and Blue are between 0 and 255
// Hue varies between 0 and 360
// Satuation between 0 and 1
// Value between 0 and 1
int DLL_CALLCONV
FIA_RGBToHSV (unsigned char red, unsigned char green, unsigned char blue,
double *hue, double *satuation, double *value)
{
unsigned char max, min, rgb[3];
*hue = 0;
*satuation = 0;
*value = 0;
rgb[0] = red, rgb[1] = green, rgb[2] = blue;
MAXMIN (rgb, 3, max, min);
if (max != min)
{
if (red == max)
{
*hue = ((double) (green - blue) / (max - min)) * 60.0;
}
if (green == max)
{
*hue = (2 + (double) (blue - red) / (max - min)) * 60.0;
}
if (blue == max)
{
*hue = (4 + (double) (red - green) / (max - min)) * 60.0;
}
}
*value = (double) max / 255.0;
if (max != 0)
{
*satuation = ((double) (max - min) / max);
}
return FIA_SUCCESS;
}
// Red, Green and Blue are between 0 and 255
// Hue varies between 0 and 360
// Satuation between 0 and 1
// Value between 0 and 1
int DLL_CALLCONV
FIA_RGBToHSL (unsigned char red, unsigned char green, unsigned char blue,
double *hue, double *satuation, double *luminosity)
{
unsigned char max, min, rgb[3];
*hue = 0;
*satuation = 0;
*luminosity = 0;
rgb[0] = red, rgb[1] = green, rgb[2] = blue;
MAXMIN (rgb, 3, max, min);
if (max != min)
{
if (red == max)
*hue = ((double) (green - blue) / (max - min)) * 60.0;
if (green == max)
*hue = (2 + (double) (blue - red) / (max - min)) * 60.0;
if (blue == max)
*hue = (4 + (double) (red - green) / (max - min)) * 60.0;
}
*luminosity = (double) (max + min) / (510.0);
if (*luminosity < 0.5)
{
*satuation = ((double) (max - min) / (510.0 * *luminosity));
}
else
{
*satuation = ((double) (max - min) / (510.0 * (2 - (2 * *luminosity))));
}
return FIA_SUCCESS;
}
template<class Tsrc> FIBITMAP*
CONVERT_TO_BYTE<Tsrc>::convert(FIBITMAP *src, BOOL scale_linear) {
FIBITMAP *dst = NULL;
unsigned x, y;
unsigned width = FreeImage_GetWidth(src);
unsigned height = FreeImage_GetHeight(src);
// allocate a 8-bit dib
dst = FreeImage_AllocateT(FIT_BITMAP, width, height, 8, 0, 0, 0);
if(!dst) return NULL;
// build a greyscale palette
RGBQUAD *pal = FreeImage_GetPalette(dst);
for(int i = 0; i < 256; i++) {
pal[i].rgbRed = (BYTE)i;
pal[i].rgbGreen = (BYTE)i;
pal[i].rgbBlue = (BYTE)i;
}
// convert the src image to dst
// (FIBITMAP are stored upside down)
if(scale_linear) {
Tsrc max, min;
double scale;
// find the min and max value of the image
Tsrc l_min, l_max;
min = 255, max = 0;
for(y = 0; y < height; y++) {
Tsrc *bits = reinterpret_cast<Tsrc*>(FreeImage_GetScanLine(src, y));
MAXMIN(bits, width, l_max, l_min);
if(l_max > max) max = l_max;
if(l_min < min) min = l_min;
}
if(max == min) {
max = 255; min = 0;
}
// compute the scaling factor
scale = 255 / (double)(max - min);
// scale to 8-bit
for(y = 0; y < height; y++) {
Tsrc *src_bits = reinterpret_cast<Tsrc*>(FreeImage_GetScanLine(src, y));
BYTE *dst_bits = FreeImage_GetScanLine(dst, y);
for(x = 0; x < width; x++) {
dst_bits[x] = (BYTE)( scale * (src_bits[x] - min) + 0.5);
}
}
} else {
for(y = 0; y < height; y++) {
Tsrc *src_bits = reinterpret_cast<Tsrc*>(FreeImage_GetScanLine(src, y));
BYTE *dst_bits = FreeImage_GetScanLine(dst, y);
for(x = 0; x < width; x++) {
// rounding
int q = int(src_bits[x] + 0.5);
dst_bits[x] = (BYTE) MIN(255, MAX(0, q));
}
}
}
return dst;
}