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| Source at commit 1166 created 13 years 10 days ago. By meklort, Fixed recent Makefile changes. Please do not use /Users/evan/SourceCode/tmp/chameleon/trunk or VPATH. the *only* time you should use /Users/evan/SourceCode/tmp/chameleon/trunk is when setting the SRCROOT variable. Also note that very soon make pkg is going to be removed. The pkg build script in trunk is very out of date. Instead please use the package maker at http://forge.voodooprojects.org/p/chameleonApplications/. Once this is ready for trunk it will be merged. | |
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| 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 "boot.h"␊ |
| 13 | ␊ |
| 14 | ␊ |
| 15 | char *getVBEInfoString();␊ |
| 16 | ␊ |
| 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 | // Returns the topleft co-ordinate where if you put the 'toCenter' pixmap,␊ |
| 48 | // it is centered in the background.␊ |
| 49 | position_t centeredIn( const pixmap_t *background, const pixmap_t *toCenter );␊ |
| 50 | ␊ |
| 51 | // Returns the topleft co-ordinate where if you put the given pixmap, its␊ |
| 52 | // center will coincide with the th given center.␊ |
| 53 | position_t centeredAt( const pixmap_t *pixmap, const position_t center );␊ |
| 54 | ␊ |
| 55 | // Utility function returns a position_t struct given the x and y coords as uint16␊ |
| 56 | position_t pos(const uint16_t x, const uint16_t y);␊ |
| 57 | ␊ |
| 58 | // Flips the R and B components of all pixels in the given pixmap␊ |
| 59 | void flipRB(pixmap_t *p);␊ |
| 60 | ␊ |
| 61 | // Utility function to get pixel at (x,y) in a pixmap␊ |
| 62 | #define pixel(p,x,y) ((p)->pixels[(x) + (y) * (p)->width])␊ |
| 63 | ␊ |
| 64 | #endif//GRAPHIC_UTILS_H␊ |
| 65 | |
