Load textures in a type-generic way

[libs/gl.git] / source / core / texture.h

diff --git a/source/core/texture.h b/source/core/texture.h
index 7fb41a622b7b3c7609baea465480603d9b1555f5..154a8c030018f0087e062001ad851c8c8ae77758 100644 (file)
--- a/source/core/texture.h
+++ b/source/core/texture.h
@@ -1,15 +1,12 @@
 #ifndef MSP_GL_TEXTURE_H_
 #define MSP_GL_TEXTURE_H_
 
-#include <msp/core/attributes.h>
+#include <msp/datafile/dynamicobjectloader.h>
 #include <msp/datafile/objectloader.h>
 #include <msp/graphics/image.h>
-#include "datatype.h"
-#include "gl.h"
 #include "pixelformat.h"
-#include "predicate.h"
-#include "sampler.h"
 #include "resource.h"
+#include "texture_backend.h"
 
 namespace Msp {
 namespace GL {
@@ -23,8 +20,10 @@ A texture can consinst of a stack of images, called a mipmap.  The dimensions
 of each mipmap level are half that of the previous level.  The mipmap stack
 can be used for texture minification; see the Sampler class for details.
 */
-class Texture: public Resource
+class Texture: public TextureBackend, public Resource
 {
+       friend TextureBackend;
+
 protected:
        class Loader: public DataFile::CollectionObjectLoader<Texture>
        {
@@ -32,10 +31,12 @@ protected:
                unsigned levels;
 
        public:
-               Loader(Texture &);
-               Loader(Texture &, Collection &);
+               Loader(Texture &t): Loader(t, 0) { }
+               Loader(Texture &t, Collection &c): Loader(t, &c) { }
        private:
-               void init();
+               Loader(Texture &, Collection *);
+
+               virtual void finish();
 
        protected:
                void load_external_image(Graphics::Image &, const std::string &);
@@ -49,11 +50,19 @@ protected:
                void mipmap_levels(unsigned);
        };
 
-       enum ParameterMask
+public:
+       class GenericLoader: public DataFile::DynamicObjectLoader<Texture>
        {
-               FORMAT_SWIZZLE = 512
+               friend class Texture;
+
+       public:
+               GenericLoader(Collection &c): DynamicObjectLoader<Texture>(&c) { }
+
+       protected:
+               virtual const TypeRegistry &get_type_registry() const { return get_texture_registry(); }
        };
 
+protected:
        enum FormatSwizzle
        {
                NO_SWIZZLE,
@@ -62,66 +71,35 @@ protected:
                RGB_TO_BGR
        };
 
-       unsigned id;
-       GLenum target;
        PixelFormat format;
        PixelFormat storage_fmt;
        FormatSwizzle swizzle;
        bool use_srgb_format;
        bool auto_gen_mipmap;
-       std::string debug_name;
 
-       static int swizzle_orders[];
+       Texture(unsigned);
 
-       Texture(GLenum, ResourceManager * = 0);
-       Texture(const Texture &);
-       Texture &operator=(const Texture &);
-public:
-       ~Texture();
-
-protected:
-       void generate_id();
        void set_format(PixelFormat);
-       void apply_swizzle();
-       void set_parameter_i(GLenum, int) const;
 
 public:
-       static bool can_generate_mipmap();
-
-       void generate_mipmap();
-
-       /** Sets automatic mipmap generation.  If enabled, mipmaps are generated
-       when a texture image is uploaded. */
-       void set_auto_generate_mipmap(bool);
+       PixelFormat get_format() const { return format; }
 
-       /// Deprecated.  Use set_auto_generate_mipmap instead.
-       DEPRECATED void set_generate_mipmap(bool g) { set_auto_generate_mipmap(g); }
+       using TextureBackend::generate_mipmap;
 
        /// Loads a Graphics::Image from a file and uploads it to the texture.
        virtual void load_image(const std::string &, unsigned = 0);
 
-       DEPRECATED void load_image(const std::string &, bool srgb);
-
        /** Uploads an image to the texture.  If storage has not been defined, it
        will be set to match the image.  Otherwise the image must be compatible
        with the defined storage.  Semantics depend on the type of texture.  */
        virtual void image(const Graphics::Image &, unsigned = 0) = 0;
 
-       DEPRECATED void image(const Graphics::Image &, bool srgb);
-
-       GLenum get_target() const { return target; }
-       unsigned get_id() const { return id; }
-
-       void bind() const { bind_to(0); }
-       void bind_to(unsigned) const;
-
-       static const Texture *current(unsigned = 0);
-       static void unbind() { unbind_from(0); }
-       static void unbind_from(unsigned);
+       virtual std::uint64_t get_data_size() const { return 0; }
 
-       virtual UInt64 get_data_size() const { return 0; }
+       using TextureBackend::set_debug_name;
 
-       void set_debug_name(const std::string &);
+private:
+       static GenericLoader::TypeRegistry &get_texture_registry();
 };
 
 } // namespace GL