X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Ftexture.h;h=c4e72031ebb174e372877dfd14972449e80d9178;hp=848517eb45c99da20a67c8261ed81488b7902ea3;hb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;hpb=ceae2a27dfc58310c5bab7e3aa3fedf0fa9a1f49 diff --git a/source/texture.h b/source/texture.h index 848517eb..c4e72031 100644 --- a/source/texture.h +++ b/source/texture.h @@ -1,72 +1,164 @@ -/* $Id$ - -This file is part of libmspgl -Copyright © 2007 Mikko Rasa, Mikkosoft Productions -Distributed under the LGPL -*/ - #ifndef MSP_GL_TEXTURE_H_ #define MSP_GL_TEXTURE_H_ -#include +#include #include +#include +#include "datatype.h" #include "gl.h" +#include "pixelformat.h" +#include "predicate.h" +#include "sampler.h" +#include "resource.h" namespace Msp { namespace GL { -enum TextureFilter -{ - NEAREST = GL_NEAREST, - LINEAR = GL_LINEAR, - NEAREST_MIPMAP_NEAREST = GL_NEAREST_MIPMAP_NEAREST, - NEAREST_MIPMAP_LINEAR = GL_NEAREST_MIPMAP_LINEAR, - LINEAR_MIPMAP_NEAREST = GL_LINEAR_MIPMAP_NEAREST, - LINEAR_MIPMAP_LINEAR = GL_LINEAR_MIPMAP_LINEAR -}; - -std::istream &operator>>(std::istream &, TextureFilter &); - - /** Base class for textures. This class only defines operations common for all -texture types and is not instantiable. For specifying images for textures, see -one of the dimensioned texture classes. +texture types and is not instantiable. For specifying images for textures, +see one of the dimensioned texture classes. + +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 +class Texture: public Resource { protected: - class Loader: public DataFile::ObjectLoader + class Loader: public DataFile::CollectionObjectLoader { + protected: + unsigned levels; + public: Loader(Texture &); - void min_filter(TextureFilter); - void mag_filter(TextureFilter); + Loader(Texture &, Collection &); + private: + void init(); + + unsigned get_levels() const; + protected: + void load_external_image(Graphics::Image &, const std::string &); + + private: + void external_image(const std::string &); + void external_image_srgb(const std::string &); + void external_image_common(const std::string &); + void filter(TextureFilter); void generate_mipmap(bool); + void image_data(const std::string &); + void mag_filter(TextureFilter); + void max_anisotropy(float); + void min_filter(TextureFilter); + void mipmap_levels(unsigned); + void sampler(); + void wrap(TextureWrap); + void wrap_r(TextureWrap); + void wrap_s(TextureWrap); + void wrap_t(TextureWrap); }; + enum ParameterMask + { + FORMAT_SWIZZLE = 512 + }; + + enum FormatSwizzle + { + NO_SWIZZLE, + R_TO_LUMINANCE, + RG_TO_LUMINANCE_ALPHA, + RGB_TO_BGR + }; + + unsigned id; + GLenum target; + PixelFormat format; + PixelFormat storage_fmt; + FormatSwizzle swizzle; + bool use_srgb_format; + bool auto_gen_mipmap; + Sampler default_sampler; + + static int swizzle_orders[]; + + Texture(GLenum, ResourceManager * = 0); + Texture(const Texture &); + Texture &operator=(const Texture &); public: ~Texture(); - void bind() const; +protected: + void set_format(PixelFormat); + void apply_swizzle(); + void set_parameter_i(GLenum, int) const; + +public: + Sampler &get_default_sampler() { return default_sampler; } + const Sampler &get_default_sampler() const { return default_sampler; } + + DEPRECATED void set_min_filter(TextureFilter); + DEPRECATED void set_mag_filter(TextureFilter); + + /** Sets filter for both minification and magnification. Since mipmapping + is not applicable to magnification, LINEAR is used instead. */ + DEPRECATED void set_filter(TextureFilter); + + DEPRECATED void set_mipmap_levels(unsigned) { } + + DEPRECATED void set_max_anisotropy(float); + + /** Sets the wrapping mode for all coordinates. */ + DEPRECATED void set_wrap(TextureWrap); + + DEPRECATED void set_wrap_s(TextureWrap); + DEPRECATED void set_wrap_t(TextureWrap); + DEPRECATED void set_wrap_r(TextureWrap); + + 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); + + /// Deprecated. Use set_auto_generate_mipmap instead. + DEPRECATED void set_generate_mipmap(bool g) { set_auto_generate_mipmap(g); } + + /** Sets depth texture comparison. Has no effect on other formats. When + comparison is enabled, the third component of the texture coordinate is + compared against the texel value, and the result is returned as the texture + sample. */ + DEPRECATED void set_compare_enabled(bool); + + /** Sets the function to use for depth comparison. */ + DEPRECATED void set_compare_func(Predicate); + + /// 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; - void parameter(GLenum, int); - void parameter(GLenum, float); - void set_min_filter(TextureFilter f) { parameter(GL_TEXTURE_MIN_FILTER, f); } - void set_mag_filter(TextureFilter f) { parameter(GL_TEXTURE_MAG_FILTER, f); } - GLenum get_target() const { return target; } - unsigned get_id() const { return id; } - - static void unbind(); + + static const Texture *current(unsigned = 0); + static void unbind() { unbind_from(0); } static void unbind_from(unsigned); -protected: - unsigned id; - GLenum target; - Texture(); - Texture(const Texture &); - Texture &operator=(const Texture &); - void maybe_bind() const; + virtual UInt64 get_data_size() const { return 0; } }; } // namespace GL