static struct ImBuf *make_waveform_view_from_ibuf_float(struct ImBuf * ibuf)
{
struct ImBuf * rval = IMB_allocImBuf(ibuf->x + 3, 515, 32, IB_rect);
int x,y;
float* src = ibuf->rect_float;
unsigned char* tgt = (unsigned char*) rval->rect;
int w = ibuf->x + 3;
int h = 515;
float waveform_gamma = 0.2;
unsigned char wtable[256];
wform_put_grid(tgt, w, h);
for (x = 0; x < 256; x++) {
wtable[x] = (unsigned char) (pow(((float) x + 1)/256,
waveform_gamma)*255);
}
for (y = 0; y < ibuf->y; y++) {
unsigned char * last_p = NULL;
for (x = 0; x < ibuf->x; x++) {
float * rgb = src + 4 * (ibuf->x * y + x);
float v = 1.0f *
( 0.299f*rgb[0]
+ 0.587f*rgb[1]
+ 0.114f*rgb[2]);
unsigned char * p = tgt;
CLAMP(v, 0.0f, 1.0f);
p += 4 * (w * ((int) (v * (h - 3)) + 1) + x + 1);
scope_put_pixel(wtable, p);
p += 4 * w;
scope_put_pixel(wtable, p);
if (last_p != NULL) {
wform_put_line(w, last_p, p);
}
last_p = p;
}
}
wform_put_border(tgt, w, h);
return rval;
}
static ImBuf *make_waveform_view_from_ibuf_byte(ImBuf *ibuf)
{
ImBuf *rval = IMB_allocImBuf(ibuf->x + 3, 515, 32, IB_rect);
int x, y;
unsigned char *src = (unsigned char *) ibuf->rect;
unsigned char *tgt = (unsigned char *) rval->rect;
int w = ibuf->x + 3;
int h = 515;
float waveform_gamma = 0.2;
unsigned char wtable[256];
wform_put_grid(tgt, w, h);
for (x = 0; x < 256; x++) {
wtable[x] = (unsigned char) (pow(((float) x + 1) / 256,
waveform_gamma) * 255);
}
for (y = 0; y < ibuf->y; y++) {
unsigned char *last_p = NULL;
for (x = 0; x < ibuf->x; x++) {
unsigned char *rgb = src + 4 * (ibuf->x * y + x);
float v = (float)rgb_to_luma_byte(rgb) / 255.0f;
unsigned char *p = tgt;
p += 4 * (w * ((int) (v * (h - 3)) + 1) + x + 1);
scope_put_pixel(wtable, p);
p += 4 * w;
scope_put_pixel(wtable, p);
if (last_p != NULL) {
wform_put_line(w, last_p, p);
}
last_p = p;
}
}
wform_put_border(tgt, w, h);
return rval;
}
