void Texture::Generate(const Dim& dim, std::function<vec4(unsigned int, unsigned int)> generator, const GLenum type)
{
ILuint image;
ilGenImages(1, &image);
ilBindImage(image);
const unsigned int numBytes = dim.GetWidth() * dim.GetHeight();
vec4* pixels = new vec4[numBytes];
for(unsigned int y=0; y<dim.GetHeight(); y++) {
for(unsigned int x=0; x<dim.GetWidth(); x++) {
pixels[y*dim.GetWidth() + x] = generator(x, y);
}
}
ilTexImage(dim.GetWidth(), dim.GetHeight(), 1, 4, IL_RGBA, IL_FLOAT, reinterpret_cast<void*>(pixels));
delete[] pixels;
if(type == GL_UNSIGNED_BYTE) {
this->iformat = GL_RGBA8;
this->type = GL_UNSIGNED_BYTE;
ilConvertImage(IL_RGBA, IL_UNSIGNED_BYTE);
}
else {
this->iformat = GL_RGBA32F;
this->type = GL_FLOAT;
}
this->format = GL_RGBA;
size.Width = ilGetInteger(IL_IMAGE_WIDTH);
size.Height = ilGetInteger(IL_IMAGE_HEIGHT);
size.Depth = ilGetInteger(IL_IMAGE_DEPTH);
InitResource(4, false, ilGetData());
ilDeleteImages(1, &image);
}
Texture::Texture(const Dim& dim, const int samples, const GLenum iformat, const GLenum format, const GLenum type)
: size(dim), samples(samples), iformat(iformat), format(format), type(type)
{
assert(samples > 0);
assert(samples == 1 || (dim.GetHeight() >= 1 && dim.GetDepth() == 1));
InitResource(0, false, nullptr);
}
Texture::Texture(const Dim& dim, const int samples, const GLenum autoformat)
: size(dim), samples(samples), iformat(autoformat)
{
assert(samples > 0);
assert(samples == 1 || (dim.GetHeight() >= 1 && dim.GetDepth() == 1));
assert(DetectFormat());
InitResource(0, false, nullptr);
}