updates

inc/hgl/graph/TextureLoader.h

@@ -0,0 +1,59 @@
+#ifndef HGL_GRAPH_TEXTURE_LOADER_INCLUDE
+#define HGL_GRAPH_TEXTURE_LOADER_INCLUDE
+
+#include<hgl/io/InputStream.h>
+#include<hgl/type/BaseString.h>
+namespace hgl
+{
+    namespace graph
+    {
+        #pragma pack(push,1)
+        struct Tex2DFileHeader
+        {
+            uint8   id[6];                  ///<Tex2D\x1A
+            uint8   version;                ///<必须为2
+            bool    mipmaps;
+            uint32  width;
+            uint32  height;
+            uint8   channels;
+            char    colors[4];
+            uint8   bits[4];
+            uint8   datatype;
+
+        public:
+
+            const uint pixel_count()const{return width*height;}
+            const uint pixel_bytes()const{return (bits[0]+bits[1]+bits[2]+bits[3])>>3;}
+            const uint total_bytes()const{return pixel_count()*pixel_bytes();}
+        };//
+        #pragma pack(pop)
+
+        /**
+         * 2D纹理加载器
+         */
+        class Texture2DLoader
+        {
+        protected:
+
+            Tex2DFileHeader file_header;
+
+        protected:        
+
+            virtual void *OnBegin(uint32)=0;
+            virtual void  OnEnd()=0;
+            virtual void  OnError(){}
+
+        public:
+
+            const Tex2DFileHeader *GetFileHeader()const{return &file_header;}
+
+        public:
+
+            virtual ~Texture2DLoader()=default;
+
+            bool Load(io::InputStream *is);
+            bool Load(const OSString &filename);
+        };//class Texture2DLoader
+    }//namespace graph
+}//namespace hgl
+#endif//HGL_GRAPH_TEXTURE_LOADER_INCLUDE