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GL: use optionally Rec.2020 or P3 YUV->RGB coefs

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This commit is contained in:
Martin Pulec
2022-06-06 13:55:36 +02:00
parent c74ccf9cc7
commit 86bb25b650
2 changed files with 19 additions and 4 deletions
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6
src/color.h
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@@ -63,8 +63,12 @@ static_assert(sizeof(comp_type_t) * 8 >= COMP_BASE + 18, "comp_type_t not wide e
#define KR_709 .212639
#define KB_709 .072192
#define KG_709 KG(KR_709,KB_709)
#define KR_2020 .262700
#define KB_2020 .059302
#define KR_P3 .228975
#define KB_P3 .079287
#define KG_709 KG(KR_709,KB_709)
#define D (2.*(KR_709+KG_709))
#define E (2.*(1.-KR_709))
#define Y_R ((comp_type_t) ((KR_709*Y_LIMIT) * (1<<COMP_BASE)))

17
src/video_display/gl.cpp
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@@ -1323,10 +1323,21 @@ static void set_mac_color_space(void) {
static GLuint gl_substitute_compile_link(const char *vprogram, const char *fprogram)
{
char *fp = strdup(fprogram);
int index = 1;
const char *col = get_commandline_param("color");
if (col) {
int color = stol(col, nullptr, 16) >> 4; // first nibble
if (color > 0 && color <= 3) {
index = color;
} else {
LOG(LOG_LEVEL_WARNING) << MOD_NAME "Wrong chromicities index " << color << "\n";
}
}
double cs_coeffs[2*4] = { 0, 0, KR_709, KB_709, KR_2020, KB_2020, KR_P3, KB_P3 };
double kr = cs_coeffs[2 * index];
double kb = cs_coeffs[2 * index + 1];
const char *placeholders[] = { "Y_SCALED_PLACEHOLDER", "R_CR_PLACEHOLDER", "G_CB_PLACEHOLDER", "G_CR_PLACEHOLDER", "B_CB_PLACEHOLDER" };
double kr = KR_709;
double kb = KB_709;
double values[] = { Y_LIMIT_INV, R_CR(kr,kb), G_CB(kr,kb), G_CR(kr,kb), B_CB(kr,kb)};
double values[] = { Y_LIMIT_INV, R_CR(kr,kb), G_CB(kr,kb), G_CR(kr,kb), B_CB(kr,kb)};
for (size_t i = 0; i < sizeof placeholders / sizeof placeholders[0]; ++i) {
char *tok = fp;