1/*
2 * Copyright (c) 2005, Oracle and/or its affiliates. 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * 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
34enum
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
43enum
44{
45    DITHER_SIZE = 16,
46    DITHER_MASK = 15
47};
48
49typedef 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
58typedef 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
79typedef 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
90enum
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
126void initRect(ImageRect * pRect, int x, int y, int width, int height, int jump,
127        int stride, void *pBits, ImageFormat * format);
128int convertRect2(ImageRect * pSrcRect, ImageRect * pDstRect, int mode,
129        ImageRect * pSrcRect2);
130int convertRect(ImageRect * pSrcRect, ImageRect * pDstRect, int mode);
131void 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);
134void initFormat(ImageFormat * format, int redMask, int greenMask,
135        int blueMask, int alphaMask);
136int fillRect(rgbquad_t color, ImageRect * pDstRect);
137void dumpFormat(ImageFormat * format);
138
139void optimizeFormat(ImageFormat * format);
140
141void initDither(DitherSettings * pDither, int numColors, int scale);
142
143int quantizeColors(int maxNumColors, int *numColors);
144
145void initColorCube(int *numColors, rgbquad_t * pColorMap,
146        DitherSettings * pDithers, rgbquad_t * colorIndex);
147int platformByteOrder();
148
149#endif
150