J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #ifndef SPLASHSCREEN_GFX_H |
| 27 | #define SPLASHSCREEN_GFX_H |
| 28 | |
| 29 | /* splashscreen_gfx is a general purpose code for converting pixmaps between various visuals |
| 30 | it is not very effective, but is universal and concise */ |
| 31 | |
| 32 | #include "splashscreen_config.h" |
| 33 | |
| 34 | enum |
| 35 | { |
| 36 | BYTE_ORDER_LSBFIRST = 0, // least significant byte first |
| 37 | BYTE_ORDER_MSBFIRST = 1, // most significant byte first |
| 38 | BYTE_ORDER_NATIVE = 2 // exactly the same as the arch we're running this on |
| 39 | // will behave identical to _LSBFIRST or _MSBFIRST, |
| 40 | // but more effective |
| 41 | }; |
| 42 | |
| 43 | enum |
| 44 | { |
| 45 | DITHER_SIZE = 16, |
| 46 | DITHER_MASK = 15 |
| 47 | }; |
| 48 | |
| 49 | typedef struct DitherSettings |
| 50 | { |
| 51 | int numColors; |
| 52 | rgbquad_t colorTable[512]; |
| 53 | unsigned matrix[DITHER_SIZE][DITHER_SIZE]; |
| 54 | } DitherSettings; |
| 55 | |
| 56 | /* this structure is similar to Xlib's Visual */ |
| 57 | |
| 58 | typedef struct ImageFormat |
| 59 | { |
| 60 | rgbquad_t mask[4]; |
| 61 | int shift[4]; |
| 62 | int depthBytes; // 1,2,3 or 4. 3 is not supported for XCVT_BYTE_ORDER_NATIVE. |
| 63 | int byteOrder; // see BYTE_ORDER_LSBFIRST, BYTE_ORDER_MSBFIRST or BYTE_ORDER_NATIVE |
| 64 | int fixedBits; // this value is or'ed with the color value on get or put, non-indexed only |
| 65 | // for indexed color, may be used when pre-decoding the colormap |
| 66 | rgbquad_t *colorMap; // colormap should be pre-decoded (i.e. an array of rgbquads) |
| 67 | // when colormap is non-NULL, the source color is an index to a colormap, and |
| 68 | // masks/shifts are unused. |
| 69 | unsigned transparentColor; // only for indexed colors. this is transparent color _INDEX_. |
| 70 | // use a more-than-max value when you don't need transparency. |
| 71 | int premultiplied; |
| 72 | DitherSettings *dithers; |
| 73 | int numColors; // in the colormap, only for indexed color |
| 74 | rgbquad_t *colorIndex; // color remapping index for dithering mode |
| 75 | } ImageFormat; |
| 76 | |
| 77 | /* this structure defines a rectangular portion of an image buffer. height and/or width may be inverted. */ |
| 78 | |
| 79 | typedef struct ImageRect |
| 80 | { |
| 81 | int numLines; // number of scanlines in the rectangle |
| 82 | int numSamples; // number of samples in the line |
| 83 | int stride; // distance between first samples of n'th and n+1'th scanlines, in bytes |
| 84 | int depthBytes; // distance between n'th and n+1'th sample in a scanline, in bytes |
| 85 | void *pBits; // points to sample 0, scanline 0 |
| 86 | ImageFormat *format; // format of the samples |
| 87 | int row, col, jump; // dithering indexes |
| 88 | } ImageRect; |
| 89 | |
| 90 | enum |
| 91 | { |
| 92 | CVT_COPY, |
| 93 | CVT_ALPHATEST, |
| 94 | CVT_BLEND |
| 95 | }; |
| 96 | |
| 97 | #define MAX_COLOR_VALUE 255 |
| 98 | #define QUAD_ALPHA_MASK 0xFF000000 |
| 99 | #define QUAD_RED_MASK 0x00FF0000 |
| 100 | #define QUAD_GREEN_MASK 0x0000FF00 |
| 101 | #define QUAD_BLUE_MASK 0x000000FF |
| 102 | |
| 103 | #define QUAD_ALPHA_SHIFT 24 |
| 104 | #define QUAD_RED_SHIFT 16 |
| 105 | #define QUAD_GREEN_SHIFT 8 |
| 106 | #define QUAD_BLUE_SHIFT 0 |
| 107 | |
| 108 | #define QUAD_ALPHA(value) (((value)&QUAD_ALPHA_MASK)>>QUAD_ALPHA_SHIFT) |
| 109 | #define QUAD_RED(value) (((value)&QUAD_RED_MASK)>>QUAD_RED_SHIFT) |
| 110 | #define QUAD_GREEN(value) (((value)&QUAD_GREEN_MASK)>>QUAD_GREEN_SHIFT) |
| 111 | #define QUAD_BLUE(value) (((value)&QUAD_BLUE_MASK)>>QUAD_BLUE_SHIFT) |
| 112 | |
| 113 | #define MAKE_QUAD(r,g,b,a) \ |
| 114 | (((a)<<QUAD_ALPHA_SHIFT)&QUAD_ALPHA_MASK)| \ |
| 115 | (((r)<<QUAD_RED_SHIFT)&QUAD_RED_MASK)| \ |
| 116 | (((g)<<QUAD_GREEN_SHIFT)&QUAD_GREEN_MASK)| \ |
| 117 | (((b)<<QUAD_BLUE_SHIFT)&QUAD_BLUE_MASK) \ |
| 118 | |
| 119 | |
| 120 | /* alpha testing threshold. what's >= the threshold is considered non-transparent when doing |
| 121 | conversion operation with CVT_ALPHATEST and when generating shapes/regions with |
| 122 | BitmapToYXBandedRectangles */ |
| 123 | |
| 124 | #define ALPHA_THRESHOLD 0x80000000 |
| 125 | |
| 126 | void initRect(ImageRect * pRect, int x, int y, int width, int height, int jump, |
| 127 | int stride, void *pBits, ImageFormat * format); |
| 128 | int convertRect2(ImageRect * pSrcRect, ImageRect * pDstRect, int mode, |
| 129 | ImageRect * pSrcRect2); |
| 130 | int convertRect(ImageRect * pSrcRect, ImageRect * pDstRect, int mode); |
| 131 | void convertLine(void *pSrc, int incSrc, void *pDst, int incDst, int n, |
| 132 | ImageFormat * srcFormat, ImageFormat * dstFormat, int mode, |
| 133 | void *pSrc2, int incSrc2, ImageFormat * srcFormat2, int row, int col); |
| 134 | void initFormat(ImageFormat * format, int redMask, int greenMask, |
| 135 | int blueMask, int alphaMask); |
| 136 | int fillRect(rgbquad_t color, ImageRect * pDstRect); |
| 137 | void dumpFormat(ImageFormat * format); |
| 138 | |
| 139 | void optimizeFormat(ImageFormat * format); |
| 140 | |
| 141 | void initDither(DitherSettings * pDither, int numColors, int scale); |
| 142 | |
| 143 | int quantizeColors(int maxNumColors, int *numColors); |
| 144 | |
| 145 | void initColorCube(int *numColors, rgbquad_t * pColorMap, |
| 146 | DitherSettings * pDithers, rgbquad_t * colorIndex); |
| 147 | int platformByteOrder(); |
| 148 | |
| 149 | #endif |