Allow texture mipmap levels to be specified in datafiles

[libs/gl.git] / source / texture2d.h

diff --git a/source/texture2d.h b/source/texture2d.h
index 221fbd7b76a28aee38d95382a2b797e34fd5d24c..092f12ba47aaa77167aaf8ee67648045dc0f8328 100644 (file)
--- a/source/texture2d.h
+++ b/source/texture2d.h
@@ -26,23 +26,27 @@ public:
 
                void raw_data(const std::string &);
                void storage(PixelFormat, unsigned, unsigned);
+               void storage_levels(PixelFormat, unsigned, unsigned, unsigned);
        };
 
 private:
        class AsyncLoader;
 
-       PixelFormat ifmt;
        unsigned width;
        unsigned height;
+       unsigned levels;
        unsigned allocated;
 
 public:
        Texture2D(ResourceManager * = 0);
        virtual ~Texture2D();
 
-       /** Defines storage structure for the texture.  Must be called before an
-       image can be uploaded.  Once storage is defined, it can't be changed. */
-       void storage(PixelFormat fmt, unsigned wd, unsigned ht);
+       /** Defines storage structure for the texture.  If lv is zero, the number
+       of mipmap levels is automatically determined from storage dimensions.
+
+       Must be called before an image can be uploaded.  Once storage is defined,
+       it can't be changed. */
+       void storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned lv = 0);
 
        /** Allocates storage for the texture.  The contents are initially
        undefined.  If storage has already been allocated, does nothing. */
@@ -65,17 +69,20 @@ public:
 
        If srgb is true and storage is determined by this call, then an sRGB pixel
        format will be used. */
-       virtual void image(const Graphics::Image &, bool srgb = false);
+       virtual void image(const Graphics::Image &, unsigned lv, bool srgb = false);
+
+       using Texture::image;
 
 private:
-       void image(const Graphics::Image &, bool, bool);
+       void image(const Graphics::Image &, unsigned, bool, bool);
 
 public:
        unsigned get_width() const { return width; }
        unsigned get_height() const { return height; }
 
 private:
-       void get_level_size(unsigned, unsigned &, unsigned &);
+       unsigned get_n_levels() const;
+       void get_level_size(unsigned, unsigned &, unsigned &) const;
 
 public:
        virtual Resource::AsyncLoader *load(IO::Seekable &, const Resources * = 0);