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deps/g3dlite/include/G3D/Image4.h

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+/**
+  \file G3D/Image4.h
+
+  \maintainer Morgan McGuire, http://graphics.cs.williams.edu
+
+  \created 2007-01-31
+  \edited  2011-08-11
+*/
+
+
+#ifndef G3D_Image4_h
+#define G3D_Image4_h
+
+#include "G3D/platform.h"
+#include "G3D/Map2D.h"
+#include "G3D/Color4.h"
+
+namespace G3D {
+
+typedef shared_ptr<class Image4> Image4Ref;
+
+/**
+ RGBA image with 32-bit floating point storage for each channel.
+
+ Whenever a method needs to convert from RGB to RGBA, A=1 is assumed.
+
+ Bilinear interpolation on Image4 is about 8x faster than on
+ Image4unorm8 due to the large cost of converting int->float on modern
+ machines.
+
+ @sa G3D::Image4unorm8, G3D::GImage.
+ */
+class Image4 : public Map2D<Color4, Color4> {
+public:
+
+    typedef Image4      Type;
+    typedef shared_ptr<class Image4>   Ref;
+
+protected:
+
+    Image4(int w, int h, WrapMode wrap);
+
+    void copyArray(const Color1* src, int w, int h);
+    void copyArray(const Color3* src, int w, int h);
+    void copyArray(const Color4* src, int w, int h);
+    void copyArray(const Color1unorm8* src, int w, int h);
+    void copyArray(const Color3unorm8* src, int w, int h);
+    void copyArray(const Color4unorm8* src, int w, int h);
+
+public:
+
+    const class ImageFormat* format() const;
+
+    /** Creates an all-zero width x height image. */
+    static Ref createEmpty(int width, int height, WrapMode wrap = WrapMode::ERROR);
+
+    /** Creates a 0 x 0 image. */
+    static Ref createEmpty(WrapMode wrap = WrapMode::ERROR);
+
+    static Ref fromFile(const std::string& filename, WrapMode wrap = WrapMode::ERROR);
+    
+    static Ref fromArray(const class Color1unorm8* ptr, int width, int height, WrapMode wrap = WrapMode::ERROR);
+    static Ref fromArray(const class Color3unorm8* ptr, int width, int height, WrapMode wrap = WrapMode::ERROR);
+    static Ref fromArray(const class Color4unorm8* ptr, int width, int height, WrapMode wrap = WrapMode::ERROR);
+    static Ref fromArray(const class Color1* ptr, int width, int height, WrapMode wrap = WrapMode::ERROR);
+    static Ref fromArray(const class Color3* ptr, int width, int height, WrapMode wrap = WrapMode::ERROR);
+    static Ref fromArray(const class Color4* ptr, int width, int height, WrapMode wrap = WrapMode::ERROR);
+
+    static Ref fromImage4unorm8(const shared_ptr<class Image4unorm8>& im);
+
+    /** Loads from any of the file formats supported by G3D::GImage. */
+    void load(const std::string& filename);
+
+    /** Saves in any of the formats supported by G3D::GImage. */
+    void save(const std::string& filename);
+};
+
+} // G3D
+
+#endif