75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
#ifndef RS_IMAGES_H_
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#define RS_IMAGES_H_
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#include <stdio.h>
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#include <stdlib.h>
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#if defined(_WIN32)
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#define OS 1
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#include <windows.h>
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#else
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#define OS 2
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#include <sys/types.h>
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#include <sys/stat.h>
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#endif
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/////////////////////////////
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///// Define new types //////
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/////////////////////////////
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/**
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* @brief RGBA pixel structure, used to store datas for implementation inside PNG files.
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*/
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typedef struct PixelRGBA {
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unsigned char _red;
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unsigned char _green;
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unsigned char _blue;
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unsigned char _alpha;
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}PIXEL_A;
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/**
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* @brief RGB pixel structure, used to store datas for implementation inside PNG files, optimised version without alpha channel support.
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*/
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typedef struct PixelRGB {
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unsigned char _red;
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unsigned char _green;
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unsigned char _blue;
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}PIXEL;
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/**
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* @brief Image definition from Rogue Squadron HMT files
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*/
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typedef struct RSImage {
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int data_size; /**< Image bytes size */
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int width, height;
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unsigned char type_; /**< Image type (0 = RBG/4bits per pixel, 1 = RBG/8bpp, 3 = RGBA/32bpp , 4 = grayscale/4bpp, 5 = grayscale/8bpp */
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unsigned char sampleBits; /**< Bits per samble */
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int paletteEntries;
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PIXEL_A alpha_color;
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PIXEL_A *pixels; /**< Image pixels list, managed like an array and declared as a pointer */
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unsigned char *samples; /**< Image samples list managed like an array and declared as a pointer */
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unsigned char palette[256][3]; /**< Image palette definition */ //TODO: Create union struct type instead
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}RS_IMAGE;
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typedef struct RSImage_desc {
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int palette_enties;
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int sample_bits;
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}RS_IMAGE_DESC;
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/////////////////////////////
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///// Declare functions /////
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/////////////////////////////
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RS_IMAGE_DESC getImageDescFromType(unsigned char type); //TODO: Optimise function
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int isTransparentColor(PIXEL_A *testColor, PIXEL_A *transp_color);
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void convert4bitsGreyto8bitsRGB(unsigned char *samples_tab, PIXEL_A *pixels_tab, int sampling, PIXEL_A *transp_color);
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void unpack4To24bitsRGB(unsigned char *samples_tab, unsigned char *pixels_tab, int size, unsigned char pal[256][3]);
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void unpack8To24bitsRGB(unsigned char *samples_tab, unsigned char *pixels_tab, int size, unsigned char pal[256][3]);
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void useOddBytes(unsigned char *src, unsigned char *dst, int size);
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void decodePixels(RS_IMAGE *img);
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PIXEL_A *pixelAt(RS_IMAGE *img, int posX , int posY);
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int getPaletteFromFile(RS_IMAGE *img, FILE *f);
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int getSamplesFromFile(RS_IMAGE *img, FILE *f);
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#endif
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