| 1 | /* Graphic utility functions and data types␊ |
| 2 | * Prashant Vaibhav (C) 12/12/2008␊ |
| 3 | * Chameleon␊ |
| 4 | */␊ |
| 5 | ␊ |
| 6 | // Everything here is 32 bits per pixel non-premultiplied ARGB format␊ |
| 7 | //␊ |
| 8 | ␊ |
| 9 | #ifndef GRAPHIC_UTILS_H␊ |
| 10 | #define GRAPHIC_UTILS_H␊ |
| 11 | ␊ |
| 12 | #include "libsaio.h"␊ |
| 13 | ␊ |
| 14 | ␊ |
| 15 | char *getVBEInfoString(void);␊ |
| 16 | void printVBEModeInfo(void);␊ |
| 17 | ␊ |
| 18 | typedef union {␊ |
| 19 | struct {␊ |
| 20 | uint8_t b;␊ |
| 21 | uint8_t g;␊ |
| 22 | uint8_t r;␊ |
| 23 | uint8_t a;␊ |
| 24 | } ch;␊ |
| 25 | uint8_t channel[4];␊ |
| 26 | uint32_t value;␊ |
| 27 | } pixel_t;␊ |
| 28 | ␊ |
| 29 | typedef struct {␊ |
| 30 | uint16_t␉height;␊ |
| 31 | uint16_t␉width;␊ |
| 32 | pixel_t*␉pixels;␊ |
| 33 | } pixmap_t;␊ |
| 34 | ␊ |
| 35 | typedef struct {␊ |
| 36 | uint32_t x;␊ |
| 37 | uint32_t y;␊ |
| 38 | } position_t;␊ |
| 39 | ␊ |
| 40 | // Blends the given pixmap into the given background at the given position␊ |
| 41 | // Uses the alpha channels to blend, and preserves the final alpha (so the␊ |
| 42 | // resultant pixmap can be blended again with another background).␊ |
| 43 | // ported from www.stereopsis.com/doubleblend.html␊ |
| 44 | void blend( const pixmap_t *blendThis, // Source image␊ |
| 45 | pixmap_t *blendInto, // Dest image␊ |
| 46 | const position_t position); // Where to place the source image␊ |
| 47 | ␊ |
| 48 | ␊ |
| 49 | //void blendFadeIn( const pixmap_t *blendThis, // Source image␊ |
| 50 | //␉␉␉␉ pixmap_t *blendInto, // Dest image␊ |
| 51 | //␉␉␉␉ const position_t position) // Where to place the source image␊ |
| 52 | ␊ |
| 53 | // Returns the topleft co-ordinate where if you put the 'toCenter' pixmap,␊ |
| 54 | // it is centered in the background.␊ |
| 55 | position_t centeredIn( const pixmap_t *background, const pixmap_t *toCenter );␊ |
| 56 | ␊ |
| 57 | // Returns the topleft co-ordinate where if you put the given pixmap, its␊ |
| 58 | // center will coincide with the th given center.␊ |
| 59 | position_t centeredAt( const pixmap_t *pixmap, const position_t center );␊ |
| 60 | ␊ |
| 61 | // Utility function returns a position_t struct given the x and y coords as uint16␊ |
| 62 | position_t pos(const uint16_t x, const uint16_t y);␊ |
| 63 | ␊ |
| 64 | // Flips the R and B components of all pixels in the given pixmap␊ |
| 65 | void flipRB(pixmap_t *p);␊ |
| 66 | ␊ |
| 67 | int getNumberArrayFromProperty( const char * propKey,␊ |
| 68 | unsigned long numbers[],␊ |
| 69 | unsigned long maxArrayCount );␊ |
| 70 | ␊ |
| 71 | ␊ |
| 72 | int setVESAGraphicsMode( unsigned short width, unsigned short height, unsigned char bitsPerPixel);␊ |
| 73 | ␊ |
| 74 | void getGraphicModeParams(unsigned long params[]);␊ |
| 75 | char *getVBEModeInfoString(void);␊ |
| 76 | ␊ |
| 77 | void blendImage(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint8_t *data);␊ |
| 78 | ␊ |
| 79 | void drawCheckerBoard(void);␊ |
| 80 | ␊ |
| 81 | int␊ |
| 82 | convertImage( unsigned short width,␊ |
| 83 | unsigned short height,␊ |
| 84 | const unsigned char *imageData,␊ |
| 85 | unsigned char **newImageData );␊ |
| 86 | ␊ |
| 87 | void drawDataRectangle( unsigned short x,␊ |
| 88 | unsigned short y,␊ |
| 89 | unsigned short width,␊ |
| 90 | unsigned short height,␊ |
| 91 | unsigned char * data );␊ |
| 92 | ␊ |
| 93 | void drawColorRectangle( unsigned short x,␊ |
| 94 | unsigned short y,␊ |
| 95 | unsigned short width,␊ |
| 96 | unsigned short height,␊ |
| 97 | unsigned char colorIndex );␊ |
| 98 | ␊ |
| 99 | ␊ |
| 100 | void setVideoMode(int mode);␊ |
| 101 | ␊ |
| 102 | char * decodeRLE( const void * rleData, int rleBlocks, int outBytes );␊ |
| 103 | ␊ |
| 104 | ␊ |
| 105 | ␊ |
| 106 | // Utility function to get pixel at (x,y) in a pixmap␊ |
| 107 | #define pixel(p,x,y) ((p)->pixels[(x) + (y) * (p)->width])␊ |
| 108 | ␊ |
| 109 | #endif//GRAPHIC_UTILS_H␊ |
| 110 | |
