RenderTexturePtr RenderTexture::Create(int width, int height, Type type, Texture::Format textureFormat, bool compressed /*= false*/)
{
unsigned int tType = type;
if (textureFormat == GL_DEPTH_COMPONENT || textureFormat == GL_DEPTH_STENCIL)
{
tType = GL_TEXTURE_2D;
}
GLuint texture;
glGenTextures(1, &texture);
glBindTexture(tType, texture);
glTexParameteri(tType, GL_TEXTURE_MIN_FILTER, 0x2600);
glTexParameteri(tType, GL_TEXTURE_MAG_FILTER, 0x2600);
glTexParameterf(tType, GL_TEXTURE_WRAP_S, 0x812F);
glTexParameterf(tType, GL_TEXTURE_WRAP_T, 0x812F);
if (textureFormat == GL_DEPTH_COMPONENT || textureFormat == GL_DEPTH_STENCIL)
{
// This is to allow usage of shadow2DProj function in the shader
glTexParameteri(tType, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
glTexParameteri(tType, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
}
int texIntFrmt = textureFormat;
int texFrmt = GL_RGB;
GetInternalFormat(tType, textureFormat, &texIntFrmt, &texFrmt);
glTexImage2D(tType, 0, textureFormat, width, height, 0, texIntFrmt, texFrmt, 0);
glBindTexture(tType, 0);
unsigned int bindingType;
//get binding type
switch (tType)
{
case GL_TEXTURE_1D:
bindingType = GL_TEXTURE_BINDING_1D;
break;
case GL_TEXTURE_3D:
bindingType = GL_TEXTURE_BINDING_3D;
break;
case GL_TEXTURE_2D:
default:
bindingType = GL_TEXTURE_BINDING_2D;
break;
}
RenderTexturePtr tex = RenderTexturePtr(new RenderTexture(tType, bindingType));
tex->m_Width = width;
tex->m_Height = height;
tex->m_TextureId = texture;
tex->m_Format = (Texture::Format)texIntFrmt;
tex->m_Type = texFrmt;
tex->m_InternalFormat = texIntFrmt;
return tex;
}
RenderTexturePtr Light::GetShadowMap()
{
return RenderTexturePtr();
}
