void COpenGLRenderableObject::BindTexture(int unit /* = 0 */)
{
if (m_texture)
{
GLDebug(glActiveTexture(GL_TEXTURE0 + unit));
GLDebug(glBindTexture(GetGLTextureType(m_texture->GetTextureType()), m_texture->GetHandle()));
}
}
void TF::Texture::SetWrap(TextureWrap wrap)
{
static const u32 glWrap[] =
{
GL_REPEAT, // REPEAT,
GL_CLAMP_TO_EDGE, // CLAMP,
GL_MIRRORED_REPEAT // MIRROR,
};
u32 glType = GetGLTextureType(type);
u32 selection = glWrap[wrap];
glBindTexture(glType, specific.texture);
glTexParameteri(glType, GL_TEXTURE_WRAP_S, selection);
glTexParameteri(glType, GL_TEXTURE_WRAP_T, selection);
glTexParameteri(glType, GL_TEXTURE_WRAP_R, selection);
}
Result GraphicsInterfaceOpenGL::writeTexture2D(void *o_tex, int width, int height, TextureFormat format, const void *buf, size_t)
{
GLenum gl_format = 0;
GLenum gl_type = 0;
GLenum gl_itype = 0;
GetGLTextureType(format, gl_format, gl_type, gl_itype);
// available OpenGL 4.5 or later
// glTextureSubImage2D((GLuint)(size_t)o_tex, 0, 0, 0, width, height, internal_format, internal_type, buf);
auto ret = Result::OK;
glBindTexture(GL_TEXTURE_2D, (GLuint)(size_t)o_tex);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, gl_format, gl_type, buf);
ret = GetGLError();
glBindTexture(GL_TEXTURE_2D, 0);
return ret;
}
Result GraphicsInterfaceOpenGL::createTexture2D(void **dst_tex, int width, int height, TextureFormat format, const void *data, ResourceFlags flags)
{
GLenum gl_format = 0;
GLenum gl_type = 0;
GLenum gl_itype = 0;
GetGLTextureType(format, gl_format, gl_type, gl_itype);
auto ret = Result::OK;
GLuint tex = 0;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, gl_itype, width, height, 0, gl_format, gl_type, data);
ret = GetGLError();
glBindTexture(GL_TEXTURE_2D, 0);
*(GLuint*)dst_tex = tex;
return ret;
}
Result GraphicsInterfaceOpenGL::readTexture2D(void *o_buf, size_t, void *tex, int, int, TextureFormat format)
{
GLenum gl_format = 0;
GLenum gl_type = 0;
GLenum gl_itype = 0;
GetGLTextureType(format, gl_format, gl_type, gl_itype);
// available OpenGL 4.5 or later
// glGetTextureImage((GLuint)(size_t)tex, 0, internal_format, internal_type, bufsize, o_buf);
sync();
auto ret = Result::OK;
glBindTexture(GL_TEXTURE_2D, (GLuint)(size_t)tex);
glGetTexImage(GL_TEXTURE_2D, 0, gl_format, gl_type, o_buf);
ret = GetGLError();
glBindTexture(GL_TEXTURE_2D, 0);
return ret;
}
void TF::Texture::SetFiltering(TextureFilter filter)
{
static const struct { u32 min, mag; } glFilters[] =
{
{ GL_NEAREST, GL_NEAREST }, // NONE
{ GL_LINEAR, GL_LINEAR }, // LINEAR
{ GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR }, // TRILINEAR
};
if ( filter == TFLT_TRILINEAR && mipLevels == 1 )
{
LOGWARNING("Trying to set trilinear filtering on texture without mipmaps, defaulting to linear");
filter = TFLT_LINEAR;
}
u32 glType = GetGLTextureType(type);
glBindTexture(glType, specific.texture);
glTexParameteri(glType, GL_TEXTURE_MIN_FILTER, glFilters[filter].min);
glTexParameteri(glType, GL_TEXTURE_MAG_FILTER, glFilters[filter].mag);
}
