src/Unix/video_blit.h

/*
 *  video_blit.h - Video/graphics emulation, blitters
 *
 *  Basilisk II (C) 1997-2004 Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef DEFINE_VIDEO_BLITTERS

#ifndef VIDEO_BLIT_H
#define VIDEO_BLIT_H

// Format of the target visual
struct VisualFormat {
        int             depth;                                  // Screen depth
        uint32  Rmask, Gmask, Bmask;    // RGB mask values
        uint32  Rshift, Gshift, Bshift; // RGB shift values
};

// Prototypes
extern void (*Screen_blit)(uint8 * dest, const uint8 * source, uint32 length);
extern bool Screen_blitter_init(VisualFormat const & visual_format, bool native_byte_order, int mac_depth);
extern uint32 ExpandMap[256];

// Glue for SheepShaver and BasiliskII
#ifdef SHEEPSHAVER
enum {
  VIDEO_DEPTH_1BIT = APPLE_1_BIT,
  VIDEO_DEPTH_2BIT = APPLE_2_BIT,
  VIDEO_DEPTH_4BIT = APPLE_4_BIT,
  VIDEO_DEPTH_8BIT = APPLE_8_BIT,
  VIDEO_DEPTH_16BIT = APPLE_16_BIT,
  VIDEO_DEPTH_32BIT = APPLE_32_BIT
};
#define VIDEO_MODE                              VideoInfo
#define VIDEO_MODE_INIT                 VideoInfo const & mode = VModes[cur_mode]
#define VIDEO_MODE_INIT_MONITOR VIDEO_MODE_INIT
#define VIDEO_MODE_ROW_BYTES    mode.viRowBytes
#define VIDEO_MODE_X                    mode.viXsize
#define VIDEO_MODE_Y                    mode.viYsize
#define VIDEO_MODE_RESOLUTION   mode.viAppleID
#define VIDEO_MODE_DEPTH                mode.viAppleMode
#else
enum {
  VIDEO_DEPTH_1BIT = VDEPTH_1BIT,
  VIDEO_DEPTH_2BIT = VDEPTH_2BIT,
  VIDEO_DEPTH_4BIT = VDEPTH_4BIT,
  VIDEO_DEPTH_8BIT = VDEPTH_8BIT,
  VIDEO_DEPTH_16BIT = VDEPTH_16BIT,
  VIDEO_DEPTH_32BIT = VDEPTH_32BIT
};
#define VIDEO_MODE                              video_mode
#define VIDEO_MODE_INIT                 video_mode const & mode = drv->mode
#define VIDEO_MODE_INIT_MONITOR video_mode const & mode = monitor.get_current_mode()
#define VIDEO_MODE_ROW_BYTES    mode.bytes_per_row
#define VIDEO_MODE_X                    mode.x
#define VIDEO_MODE_Y                    mode.y
#define VIDEO_MODE_RESOLUTION   mode.resolution_id
#define VIDEO_MODE_DEPTH                mode.depth
#endif

#endif /* VIDEO_BLIT_H */

#else

#ifndef FB_DEPTH
# error "Undefined screen depth"
#endif

#if !defined(FB_BLIT_1) && (FB_DEPTH <= 16)
# error "Undefined 16-bit word blit function"
#endif

#if !defined(FB_BLIT_2)
# error "Undefined 32-bit word blit function"
#endif

#if !defined(FB_BLIT_4)
# error "Undefined 64-bit word blit function"
#endif

static void FB_FUNC_NAME(uint8 * dest, const uint8 * source, uint32 length)
{
#define DEREF_WORD_PTR(ptr, ofs) (((uint16 *)(ptr))[(ofs)])
#define DEREF_LONG_PTR(ptr, ofs) (((uint32 *)(ptr))[(ofs)])
#define DEREF_QUAD_PTR(ptr, ofs) (((uint64 *)(ptr))[(ofs)])
        
#ifndef UNALIGNED_PROFITABLE
#if FB_DEPTH <= 8
        // Align source and dest to 16-bit word boundaries
        if (((unsigned long) source) & 1) {
                *dest++ = *source++;
                length -= 1;
        }
#endif
        
#if FB_DEPTH <= 16
        // Align source and dest to 32-bit word boundaries
        if (((unsigned long) source) & 2) {
                FB_BLIT_1(DEREF_WORD_PTR(dest, 0), DEREF_WORD_PTR(source, 0));
                dest += 2; source += 2;
                length -= 2;
        }
#endif
#endif
        
        // Blit 8-byte words
        if (length >= 8) {
                const int remainder = (length / 8) % 8;
                source += remainder * 8;
                dest += remainder * 8;
                
                int n = ((length / 8) + 7) / 8;
                switch (remainder) {
                case 0: do {
                                dest += 64; source += 64;
                                FB_BLIT_4(DEREF_QUAD_PTR(dest, -8), DEREF_QUAD_PTR(source, -8));
                case 7: FB_BLIT_4(DEREF_QUAD_PTR(dest, -7), DEREF_QUAD_PTR(source, -7));
                case 6: FB_BLIT_4(DEREF_QUAD_PTR(dest, -6), DEREF_QUAD_PTR(source, -6));
                case 5: FB_BLIT_4(DEREF_QUAD_PTR(dest, -5), DEREF_QUAD_PTR(source, -5));
                case 4: FB_BLIT_4(DEREF_QUAD_PTR(dest, -4), DEREF_QUAD_PTR(source, -4));
                case 3: FB_BLIT_4(DEREF_QUAD_PTR(dest, -3), DEREF_QUAD_PTR(source, -3));
                case 2: FB_BLIT_4(DEREF_QUAD_PTR(dest, -2), DEREF_QUAD_PTR(source, -2));
                case 1: FB_BLIT_4(DEREF_QUAD_PTR(dest, -1), DEREF_QUAD_PTR(source, -1));
                                } while (--n > 0);
                }
        }
        
        // There could be one long left to blit
        if (length & 4) {
                FB_BLIT_2(DEREF_LONG_PTR(dest, 0), DEREF_LONG_PTR(source, 0));
#if FB_DEPTH <= 16
                dest += 4;
                source += 4;
#endif
        }
        
#if FB_DEPTH <= 16
        // There could be one word left to blit
        if (length & 2) {
                FB_BLIT_1(DEREF_WORD_PTR(dest, 0), DEREF_WORD_PTR(source, 0));
#if FB_DEPTH <= 8
                dest += 2;
                source += 2;
#endif
        }
#endif
        
#if FB_DEPTH <= 8
        // There could be one byte left to blit
        if (length & 1)
                *dest = *source;
#endif
        
#undef DEREF_LONG_PTR
#undef DEREF_WORD_PTR
}

#undef FB_FUNC_NAME

#ifdef FB_BLIT_1
#undef FB_BLIT_1
#endif

#ifdef FB_BLIT_2
#undef FB_BLIT_2
#endif

#ifdef FB_BLIT_4
#undef FB_BLIT_4
#endif

#ifdef FB_DEPTH
#undef FB_DEPTH
#endif

#endif /* DEFINE_VIDEO_BLITTERS */
Revision:	1.11
Committed:	2004-06-29T21:50:23Z (20 years ago) by gbeauche
Content type:	text/plain
Branch:	MAIN
Changes since 1.10:	+1 -1 lines
Log Message:	Don't try to make a cast value an lvalue (Brian Johnson). Add some explicit casts to (int) in order to avaoid this warning: warning: comparison between `const enum video_depth' and `enum <anonymous>'
#	User	Rev	Content
1	gbeauche	1.1	/*
2			* video_blit.h - Video/graphics emulation, blitters
3			*
4	cebix	1.7	* Basilisk II (C) 1997-2004 Christian Bauer
5	gbeauche	1.1	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21	gbeauche	1.8	#ifndef DEFINE_VIDEO_BLITTERS
22
23			#ifndef VIDEO_BLIT_H
24			#define VIDEO_BLIT_H
25
26			// Format of the target visual
27			struct VisualFormat {
28			int depth; // Screen depth
29			uint32 Rmask, Gmask, Bmask; // RGB mask values
30			uint32 Rshift, Gshift, Bshift; // RGB shift values
31			};
32
33	gbeauche	1.9	// Prototypes
34	gbeauche	1.8	extern void (Screen_blit)(uint8 dest, const uint8 * source, uint32 length);
35			extern bool Screen_blitter_init(VisualFormat const & visual_format, bool native_byte_order, int mac_depth);
36			extern uint32 ExpandMap[256];
37
38	gbeauche	1.9	// Glue for SheepShaver and BasiliskII
39			#ifdef SHEEPSHAVER
40			enum {
41			VIDEO_DEPTH_1BIT = APPLE_1_BIT,
42			VIDEO_DEPTH_2BIT = APPLE_2_BIT,
43			VIDEO_DEPTH_4BIT = APPLE_4_BIT,
44			VIDEO_DEPTH_8BIT = APPLE_8_BIT,
45			VIDEO_DEPTH_16BIT = APPLE_16_BIT,
46			VIDEO_DEPTH_32BIT = APPLE_32_BIT
47			};
48			#define VIDEO_MODE VideoInfo
49			#define VIDEO_MODE_INIT VideoInfo const & mode = VModes[cur_mode]
50	gbeauche	1.10	#define VIDEO_MODE_INIT_MONITOR VIDEO_MODE_INIT
51	gbeauche	1.9	#define VIDEO_MODE_ROW_BYTES mode.viRowBytes
52			#define VIDEO_MODE_X mode.viXsize
53			#define VIDEO_MODE_Y mode.viYsize
54			#define VIDEO_MODE_RESOLUTION mode.viAppleID
55			#define VIDEO_MODE_DEPTH mode.viAppleMode
56			#else
57			enum {
58			VIDEO_DEPTH_1BIT = VDEPTH_1BIT,
59			VIDEO_DEPTH_2BIT = VDEPTH_2BIT,
60			VIDEO_DEPTH_4BIT = VDEPTH_4BIT,
61			VIDEO_DEPTH_8BIT = VDEPTH_8BIT,
62			VIDEO_DEPTH_16BIT = VDEPTH_16BIT,
63			VIDEO_DEPTH_32BIT = VDEPTH_32BIT
64			};
65			#define VIDEO_MODE video_mode
66			#define VIDEO_MODE_INIT video_mode const & mode = drv->mode
67	gbeauche	1.10	#define VIDEO_MODE_INIT_MONITOR video_mode const & mode = monitor.get_current_mode()
68	gbeauche	1.9	#define VIDEO_MODE_ROW_BYTES mode.bytes_per_row
69			#define VIDEO_MODE_X mode.x
70			#define VIDEO_MODE_Y mode.y
71			#define VIDEO_MODE_RESOLUTION mode.resolution_id
72	gbeauche	1.11	#define VIDEO_MODE_DEPTH mode.depth
73	gbeauche	1.9	#endif
74
75	gbeauche	1.8	#endif /* VIDEO_BLIT_H */
76
77			#else
78
79	gbeauche	1.4	#ifndef FB_DEPTH
80			# error "Undefined screen depth"
81			#endif
82
83			#if !defined(FB_BLIT_1) && (FB_DEPTH <= 16)
84	gbeauche	1.1	# error "Undefined 16-bit word blit function"
85			#endif
86
87	gbeauche	1.4	#if !defined(FB_BLIT_2)
88	gbeauche	1.1	# error "Undefined 32-bit word blit function"
89			#endif
90
91	gbeauche	1.5	#if !defined(FB_BLIT_4)
92			# error "Undefined 64-bit word blit function"
93			#endif
94
95	gbeauche	1.1	static void FB_FUNC_NAME(uint8 * dest, const uint8 * source, uint32 length)
96			{
97	gbeauche	1.5	#define DEREF_WORD_PTR(ptr, ofs) (((uint16 *)(ptr))[(ofs)])
98	gbeauche	1.4	#define DEREF_LONG_PTR(ptr, ofs) (((uint32 *)(ptr))[(ofs)])
99	gbeauche	1.5	#define DEREF_QUAD_PTR(ptr, ofs) (((uint64 *)(ptr))[(ofs)])
100	gbeauche	1.3
101	gbeauche	1.4	#ifndef UNALIGNED_PROFITABLE
102	gbeauche	1.1	#if FB_DEPTH <= 8
103			// Align source and dest to 16-bit word boundaries
104	gbeauche	1.4	if (((unsigned long) source) & 1) {
105			dest++ = source++;
106	gbeauche	1.1	length -= 1;
107			}
108			#endif
109
110			#if FB_DEPTH <= 16
111			// Align source and dest to 32-bit word boundaries
112			if (((unsigned long) source) & 2) {
113	gbeauche	1.4	FB_BLIT_1(DEREF_WORD_PTR(dest, 0), DEREF_WORD_PTR(source, 0));
114			dest += 2; source += 2;
115	gbeauche	1.1	length -= 2;
116			}
117			#endif
118	gbeauche	1.4	#endif
119	gbeauche	1.1
120	gbeauche	1.5	// Blit 8-byte words
121			if (length >= 8) {
122			const int remainder = (length / 8) % 8;
123			source += remainder * 8;
124			dest += remainder * 8;
125	gbeauche	1.1
126	gbeauche	1.5	int n = ((length / 8) + 7) / 8;
127	gbeauche	1.1	switch (remainder) {
128			case 0: do {
129	gbeauche	1.5	dest += 64; source += 64;
130			FB_BLIT_4(DEREF_QUAD_PTR(dest, -8), DEREF_QUAD_PTR(source, -8));
131			case 7: FB_BLIT_4(DEREF_QUAD_PTR(dest, -7), DEREF_QUAD_PTR(source, -7));
132			case 6: FB_BLIT_4(DEREF_QUAD_PTR(dest, -6), DEREF_QUAD_PTR(source, -6));
133			case 5: FB_BLIT_4(DEREF_QUAD_PTR(dest, -5), DEREF_QUAD_PTR(source, -5));
134			case 4: FB_BLIT_4(DEREF_QUAD_PTR(dest, -4), DEREF_QUAD_PTR(source, -4));
135			case 3: FB_BLIT_4(DEREF_QUAD_PTR(dest, -3), DEREF_QUAD_PTR(source, -3));
136			case 2: FB_BLIT_4(DEREF_QUAD_PTR(dest, -2), DEREF_QUAD_PTR(source, -2));
137			case 1: FB_BLIT_4(DEREF_QUAD_PTR(dest, -1), DEREF_QUAD_PTR(source, -1));
138	gbeauche	1.1	} while (--n > 0);
139			}
140			}
141
142	gbeauche	1.5	// There could be one long left to blit
143			if (length & 4) {
144			FB_BLIT_2(DEREF_LONG_PTR(dest, 0), DEREF_LONG_PTR(source, 0));
145			#if FB_DEPTH <= 16
146			dest += 4;
147			source += 4;
148			#endif
149			}
150
151	gbeauche	1.1	#if FB_DEPTH <= 16
152	gbeauche	1.4	// There could be one word left to blit
153	gbeauche	1.1	if (length & 2) {
154	gbeauche	1.4	FB_BLIT_1(DEREF_WORD_PTR(dest, 0), DEREF_WORD_PTR(source, 0));
155	gbeauche	1.3	#if FB_DEPTH <= 8
156	gbeauche	1.4	dest += 2;
157			source += 2;
158	gbeauche	1.3	#endif
159	gbeauche	1.2	}
160			#endif
161
162			#if FB_DEPTH <= 8
163	gbeauche	1.4	// There could be one byte left to blit
164	gbeauche	1.3	if (length & 1)
165	gbeauche	1.4	dest = source;
166	gbeauche	1.1	#endif
167	gbeauche	1.4
168			#undef DEREF_LONG_PTR
169			#undef DEREF_WORD_PTR
170	gbeauche	1.1	}
171
172			#undef FB_FUNC_NAME
173
174			#ifdef FB_BLIT_1
175			#undef FB_BLIT_1
176			#endif
177
178			#ifdef FB_BLIT_2
179			#undef FB_BLIT_2
180	gbeauche	1.5	#endif
181
182			#ifdef FB_BLIT_4
183			#undef FB_BLIT_4
184	gbeauche	1.1	#endif
185
186			#ifdef FB_DEPTH
187			#undef FB_DEPTH
188			#endif
189	gbeauche	1.8
190			#endif /* DEFINE_VIDEO_BLITTERS */