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DependentExtensions/cat/gfx/LoadBitmap.hpp

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+/*
+	Copyright (c) 2009 Christopher A. Taylor.  All rights reserved.
+
+	Redistribution and use in source and binary forms, with or without
+	modification, are permitted provided that the following conditions are met:
+
+	* Redistributions of source code must retain the above copyright notice,
+	  this list of conditions and the following disclaimer.
+	* Redistributions in binary form must reproduce the above copyright notice,
+	  this list of conditions and the following disclaimer in the documentation
+	  and/or other materials provided with the distribution.
+	* Neither the name of LibCat nor the names of its contributors may be used
+	  to endorse or promote products derived from this software without
+	  specific prior written permission.
+
+	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+	AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+	ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+	LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+	CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+	POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef LOAD_BITMAP_HPP
+#define LOAD_BITMAP_HPP
+
+#include <cat/Platform.hpp>
+
+namespace cat {
+
+
+/*
+	LoadBitmap() loads a memory-mapped bitmap or a file from disk into RGBA format,
+	meaning the first byte of every pixel is Red, then Green, Blue, and Alpha.
+	The output data is useful for creating an OpenGL texture using GL_RGBA format.
+	The output width and height will be powers of two.
+
+	Parameters:
+		file, bytes : Memory-mapped file pointer and number of bytes in the file
+		path : Alternatively, the path to the file to load
+		width, height : The dimensions of the loaded file, in pixels
+
+	Returns: Zero on error, or a pointer to the rasterized RGBA pixels.
+
+	Free the allocated memory using Aligned::Delete(a);
+*/
+void *LoadBitmap(void *file, u32 bytes, u32 &width, u32 &height);
+void *LoadBitmap(const char *path, u32 &width, u32 &height);
+
+
+class BMPTokenizer
+{
+	u8 trans_red, trans_green, trans_blue;
+
+	bool requirePOTS; // Require Power-of-Two Size
+
+	void rasterizeImage(u8 *image);
+	void onImage(u32 *image, u32 newWidth, u32 newHeight);
+
+public:
+	BMPTokenizer();
+	~BMPTokenizer();
+
+public:
+	bool LoadFile(const char *path);
+};
+
+
+} // namespace cat
+
+#endif // LOAD_BITMAP_HPP