/* byte to float pixels, input and output 4-channel RGBA */
void IMB_buffer_float_from_byte(float *rect_to,
const uchar *rect_from,
int profile_to,
int profile_from,
bool predivide,
int width,
int height,
int stride_to,
int stride_from)
{
float tmp[4];
int x, y;
/* we need valid profiles */
BLI_assert(profile_to != IB_PROFILE_NONE);
BLI_assert(profile_from != IB_PROFILE_NONE);
/* RGBA input */
for (y = 0; y < height; y++) {
const uchar *from = rect_from + stride_from * y * 4;
float *to = rect_to + ((size_t)stride_to) * y * 4;
if (profile_to == profile_from) {
/* no color space conversion */
for (x = 0; x < width; x++, from += 4, to += 4) {
rgba_uchar_to_float(to, from);
}
}
else if (profile_to == IB_PROFILE_LINEAR_RGB) {
/* convert sRGB to linear */
if (predivide) {
for (x = 0; x < width; x++, from += 4, to += 4) {
srgb_to_linearrgb_uchar4_predivide(to, from);
}
}
else {
for (x = 0; x < width; x++, from += 4, to += 4) {
srgb_to_linearrgb_uchar4(to, from);
}
}
}
else if (profile_to == IB_PROFILE_SRGB) {
/* convert linear to sRGB */
if (predivide) {
for (x = 0; x < width; x++, from += 4, to += 4) {
rgba_uchar_to_float(tmp, from);
linearrgb_to_srgb_predivide_v4(to, tmp);
}
}
else {
for (x = 0; x < width; x++, from += 4, to += 4) {
rgba_uchar_to_float(tmp, from);
linearrgb_to_srgb_v4(to, tmp);
}
}
}
}
}
MINLINE void srgb_to_linearrgb_uchar4_predivide(float linear[4], const unsigned char srgb[4])
{
float fsrgb[4];
int i;
if (srgb[3] == 255 || srgb[3] == 0) {
srgb_to_linearrgb_uchar4(linear, srgb);
return;
}
for (i = 0; i < 4; i++)
fsrgb[i] = srgb[i] * (1.0f / 255.0f);
srgb_to_linearrgb_predivide_v4(linear, fsrgb);
}
/* add renderlayer and renderpass for each grease pencil layer for using in composition */
static void add_gpencil_renderpass(OGLRender *oglrender, RenderResult *rr, RenderView *rv)
{
bGPdata *gpd = oglrender->scene->gpd;
Scene *scene = oglrender->scene;
/* sanity checks */
if (gpd == NULL) {
return;
}
if (scene == NULL) {
return;
}
if (BLI_listbase_is_empty(&gpd->layers)) {
return;
}
if (oglrender->v3d != NULL && (oglrender->v3d->flag2 & V3D_SHOW_GPENCIL) == 0) {
return;
}
/* save old alpha mode */
short oldalphamode = scene->r.alphamode;
/* set alpha transparent for gp */
scene->r.alphamode = R_ALPHAPREMUL;
/* saves layer status */
short *oldsts = MEM_mallocN(BLI_listbase_count(&gpd->layers) * sizeof(short), "temp_gplayers_flag");
int i = 0;
for (bGPDlayer *gpl = gpd->layers.first; gpl; gpl = gpl->next) {
oldsts[i] = gpl->flag;
++i;
}
/* loop all layers to create separate render */
for (bGPDlayer *gpl = gpd->layers.first; gpl; gpl = gpl->next) {
/* dont draw layer if hidden */
if (gpl->flag & GP_LAYER_HIDE)
continue;
/* hide all layer except current */
for (bGPDlayer *gph = gpd->layers.first; gph; gph = gph->next) {
if (gpl != gph) {
gph->flag |= GP_LAYER_HIDE;
}
}
/* render this gp layer */
screen_opengl_render_doit(oglrender, rr);
/* add RendePass composite */
RenderPass *rp = RE_create_gp_pass(rr, gpl->info, rv->name);
/* copy image data from rectf */
// XXX: Needs conversion.
unsigned char *src = (unsigned char *)RE_RenderViewGetById(rr, oglrender->view_id)->rect32;
if (src != NULL) {
float *dest = rp->rect;
int x, y, rectx, recty;
rectx = rr->rectx;
recty = rr->recty;
for (y = 0; y < recty; y++) {
for (x = 0; x < rectx; x++) {
unsigned char *pixSrc = src + 4 * (rectx * y + x);
if (pixSrc[3] > 0) {
float *pixDest = dest + 4 * (rectx * y + x);
float float_src[4];
srgb_to_linearrgb_uchar4(float_src, pixSrc);
addAlphaOverFloat(pixDest, float_src);
}
}
}
}
/* back layer status */
i = 0;
for (bGPDlayer *gph = gpd->layers.first; gph; gph = gph->next) {
gph->flag = oldsts[i];
++i;
}
}
/* free memory */
MEM_freeN(oldsts);
/* back default alpha mode */
scene->r.alphamode = oldalphamode;
}