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#include "texmapcolouriser.h"
dTexMapColouriser_c::dTexMapColouriser_c() {
texmap = 0;
original = 0;
mine = 0;
}
void *EGG__Heap__alloc(unsigned long size, int unk, void *heap);
void EGG__Heap__free(void *ptr, void *heap);
dTexMapColouriser_c::~dTexMapColouriser_c() {
resetAndClear();
}
void dTexMapColouriser_c::resetAndClear() {
texmap = 0;
if (mine) {
EGG__Heap__free(mine, 0);
mine = 0;
}
}
void dTexMapColouriser_c::setTexMap(nw4r::lyt::TexMap *tm) {
OSReport("Colourising TexMap: %p (w:%d h:%d)\n", tm, tm->width, tm->height);
if (texmap)
resetAndClear();
if (tm->mBits.textureFormat != GX_TF_IA8) {
OSReport("Warning: Trying to colourise image whose format is %d not GX_TF_IA8\n", tm->mBits.textureFormat);
}
texmap = tm;
original = (u16*)tm->image;
mine = (u16*)EGG__Heap__alloc(tm->width * tm->height * 4, 0x20, mHeap::gameHeaps[2]);
tm->image = mine;
tm->mBits.textureFormat = GX_TF_RGBA8;
}
void dTexMapColouriser_c::applyAlso(nw4r::lyt::TexMap *tm) {
if (!texmap) {
setTexMap(tm);
} else {
tm->image = mine;
tm->mBits.textureFormat = GX_TF_RGBA8;
}
}
inline static float hslValue(float n1, float n2, float hue) {
if (hue > 6.0f)
hue -= 6.0f;
else if (hue < 0.0f)
hue += 6.0f;
if (hue < 1.0f)
return n1 + (n2 - n1) * hue;
else if (hue < 3.0f)
return n2;
else if (hue < 4.0f)
return n1 + (n2 - n1) * (4.0f - hue);
else
return n1;
}
void dTexMapColouriser_c::colourise(int h, int s, int l) {
if (!mine)
return;
int width = texmap->width, height = texmap->height;
int texelW = width / 4, texelH = height / 4;
u16 *source = original, *dest = mine;
float hueParam = h / 360.0f;
float satParam = s / 100.0f;
float lumParam = l / 100.0f;
for (int texelY = 0; texelY < texelH; texelY++) {
for (int texelX = 0; texelX < texelW; texelX++) {
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
u8 intensity = *source & 0xFF;
u8 alpha = *source >> 8;
u8 r, g, b;
// This is a hack
if (alpha < 250) {
r = g = b = intensity;
} else {
// converting from GIMP's colourise code...
// h and s are always the same
// l is the only thing we need to touch:
// we get the luminance from the source pixel
// (which, conveniently, is the intensity)
// manipulate it using the passed l and then
// convert the whole thing to RGB
float lum = intensity / 255.0f;
// manipulate it
if (l > 0) {
lum = lum * (1.0f - lumParam);
lum += (1.0f - (1.0f - lumParam));
} else if (l < 0) {
lum = lum * (lumParam + 1.0f);
}
// make it RGB
if (s == 0) {
r = g = b = lum*255.0f;
} else {
float m1, m2;
if (lum <= 0.5f)
m2 = lum * (1.0f + satParam);
else
m2 = lum + satParam - lum * satParam;
m1 = 2.0f * lum - m2;
r = hslValue(m1, m2, hueParam * 6.0f + 2.0) * 255.0f;
g = hslValue(m1, m2, hueParam * 6.0f) * 255.0f;
b = hslValue(m1, m2, hueParam * 6.0f - 2.0) * 255.0f;
}
}
// now write it
dest[0] = (alpha<<8)|r;
dest[16] = (g<<8)|b;
source++;
dest++;
}
}
dest += 16;
}
}
}
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