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