84 lines
3.5 KiB
C++
84 lines
3.5 KiB
C++
/************************************************************************
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* Copyright (c) 2005-2007 tok@openlinux.org.uk *
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* *
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* This software is provided as-is, without any express or implied *
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* warranty. In no event will the authors be held liable for any *
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* damages arising from the use of this software. *
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* *
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* Permission is granted to anyone to use this software for any purpose, *
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* including commercial applications, and to alter it and redistribute *
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* it freely, subject to the following restrictions: *
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* *
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* 1. The origin of this software must not be misrepresented; you must *
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* not claim that you wrote the original software. If you use this *
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* software in a product, an acknowledgment in the product documentation *
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* would be appreciated but is not required. *
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* *
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* 2. Altered source versions must be plainly marked as such, and must *
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* not be misrepresented as being the original software. *
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* *
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* 3. This notice may not be removed or altered from any source *
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* distribution. *
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************************************************************************/
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#ifndef UTIL_IMAGE_LOADER_H
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#define UTIL_IMAGE_LOADER_H
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#include <SDL_opengl.h>
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#include <string>
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#include "gl_pagedtexture.h"
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namespace ImageUtil {
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/** Helper to calculate 2^k texture sizes.
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*/
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struct NextPowerOfTwo {
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NextPowerOfTwo(uint32_t _w, uint32_t _h) {
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w = 1; h = 1;
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while (w < _w) { w <<= 1; }
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while (h < _h) { h <<= 1; }
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}
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uint32_t w;
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uint32_t h;
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};
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/** Run scale2x on 32bit input image.
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*
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* \note Uses Util::BufferCache for dst memory; lock 'src' before calling
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* if it also is a BufferCache buffer.
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*/
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uint8_t* scale2x_32bit(const uint8_t* src, const int src_width, const int src_height);
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uint8_t* scale2x_24bit(const uint8_t* src, const int src_width, const int src_height);
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typedef std::pair<uint16_t, uint16_t> WidthHeightPair;
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// hardcoded data for known images
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WidthHeightPair lookupImageSize(const std::string & name, const uint32_t size);
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// load a rgb image
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OpenGL::PagedTexture loadImageRAW(const std::string & name);
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// load a palette image and guess the palette filename
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//OpenGL::PagedTexture loadImageRAT(const std::string & name);
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// load a palette image using palette file
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OpenGL::PagedTexture loadImageRATWithPalette(const std::string & name,
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const std::string & palette_file);
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#ifdef WITH_SDL_IMAGE
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OpenGL::PagedTexture loadImageSDL(const std::string & name);
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#endif
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extern bool mipmapTextures;
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extern GLfloat supportedMaxAnisoDegree;
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// plain simple garden-variety create-a-texture; needs to be 2^k
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GLuint createGLTexture(GLsizei w, GLsizei h, bool rgba,
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const void* pixels);
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// blitting a buffer into another; no checks done!
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void copyImage2Image(uint8_t *dest, const uint8_t *src, const uint16_t
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srcWidth, const uint16_t srcHeight, const uint16_t destWidth);
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// texture-class instance from pixel data; does transform to 2^k if required
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OpenGL::PagedTexture createEmbeddedTexture(GLsizei w, GLsizei h, bool rgba,
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const void *pixels);
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}
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#endif
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