void IrrDriver::generateSkyboxCubemap()
{
glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
glGenTextures(1, &SkyboxCubeMap);
glGenTextures(1, &ConvolutedSkyboxCubeMap);
GLint w = 0, h = 0;
for (unsigned i = 0; i < 6; i++)
{
w = MAX2(w, SkyboxTextures[i]->getOriginalSize().Width);
h = MAX2(h, SkyboxTextures[i]->getOriginalSize().Height);
}
const unsigned texture_permutation[] = { 2, 3, 0, 1, 5, 4 };
char *rgba[6];
for (unsigned i = 0; i < 6; i++)
rgba[i] = new char[w * h * 4];
for (unsigned i = 0; i < 6; i++)
{
unsigned idx = texture_permutation[i];
video::IImage* image = getVideoDriver()->createImageFromData(
SkyboxTextures[idx]->getColorFormat(),
SkyboxTextures[idx]->getSize(),
SkyboxTextures[idx]->lock(),
false
);
SkyboxTextures[idx]->unlock();
image->copyToScaling(rgba[i], w, h);
image->drop();
glBindTexture(GL_TEXTURE_CUBE_MAP, SkyboxCubeMap);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, w, h, 0, GL_BGRA, GL_UNSIGNED_BYTE, (GLvoid*)rgba[i]);
}
testSH(rgba, w, h, blueSHCoeff, greenSHCoeff, redSHCoeff);
for (unsigned i = 0; i < 6; i++)
{
glBindTexture(GL_TEXTURE_CUBE_MAP, ConvolutedSkyboxCubeMap);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, w, h, 0, GL_BGRA, GL_UNSIGNED_BYTE, (GLvoid*)rgba[i]);
}
for (unsigned i = 0; i < 6; i++)
delete[] rgba[i];
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
}
void IrrDriver::generateDiffuseCoefficients()
{
if (!m_SH_dirty)
return;
m_SH_dirty = false;
const unsigned texture_permutation[] = { 2, 3, 0, 1, 5, 4 };
if (SphericalHarmonicsTextures.size() == 6)
{
unsigned sh_w = 0, sh_h = 0;
for (unsigned i = 0; i < 6; i++)
{
sh_w = MAX2(sh_w, SphericalHarmonicsTextures[i]->getOriginalSize().Width);
sh_h = MAX2(sh_h, SphericalHarmonicsTextures[i]->getOriginalSize().Height);
}
unsigned char *sh_rgba[6];
for (unsigned i = 0; i < 6; i++)
sh_rgba[i] = new unsigned char[sh_w * sh_h * 4];
for (unsigned i = 0; i < 6; i++)
{
unsigned idx = texture_permutation[i];
video::IImage* image = getVideoDriver()->createImageFromData(
SphericalHarmonicsTextures[idx]->getColorFormat(),
SphericalHarmonicsTextures[idx]->getSize(),
SphericalHarmonicsTextures[idx]->lock(),
false
);
SphericalHarmonicsTextures[idx]->unlock();
image->copyToScaling(sh_rgba[i], sh_w, sh_h);
delete image;
}
testSH(sh_rgba, sh_w, sh_h, blueSHCoeff, greenSHCoeff, redSHCoeff);
for (unsigned i = 0; i < 6; i++)
delete[] sh_rgba[i];
}
else
{
int sh_w = 16;
int sh_h = 16;
video::SColor ambient = m_scene_manager->getAmbientLight().toSColor();
unsigned char *sh_rgba[6];
for (unsigned i = 0; i < 6; i++)
{
sh_rgba[i] = new unsigned char[sh_w * sh_h * 4];
for (int j = 0; j < sh_w * sh_h * 4; j += 4)
{
sh_rgba[i][j] = ambient.getBlue();
sh_rgba[i][j + 1] = ambient.getGreen();
sh_rgba[i][j + 2] = ambient.getRed();
sh_rgba[i][j + 3] = 255;
}
}
testSH(sh_rgba, sh_w, sh_h, blueSHCoeff, greenSHCoeff, redSHCoeff);
// Diffuse env map is x 0.25, compensate
for (unsigned i = 0; i < 9; i++)
{
blueSHCoeff[i] *= 4;
greenSHCoeff[i] *= 4;
redSHCoeff[i] *= 4;
}
for (unsigned i = 0; i < 6; i++)
delete[] sh_rgba[i];
}
/*for (unsigned i = 0; i < 6; i++)
{
glBindTexture(GL_TEXTURE_CUBE_MAP, ConvolutedSkyboxCubeMap);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_SRGB_ALPHA, w, h, 0, GL_BGRA, GL_UNSIGNED_BYTE, (GLvoid*)rgba[i]);
}
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);*/
}
