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authorJens Arnold <amiconn@rockbox.org>2005-07-25 20:50:34 +0000
committerJens Arnold <amiconn@rockbox.org>2005-07-25 20:50:34 +0000
commitc20a00ef3e35b15acf422a2e7f6716abde840c24 (patch)
tree903cf122a1203360022dad4a06cc24b7ea805463 /apps/plugins/lib/gray_drawline.c
parent12a4ed383f21b65a5a244f47fe1bc9f13d4f63bb (diff)
downloadrockbox-c20a00ef3e35b15acf422a2e7f6716abde840c24.tar.gz
rockbox-c20a00ef3e35b15acf422a2e7f6716abde840c24.zip
Complete rework of the grayscale library: (1) Implemented the new rockbox graphics api. (2) Added buffered mode, and implemented most drawing functions for buffered mode only. Buffered mode will ease implementation of animated graphics. Some functions are additionally provided as unbuffered versions (drawing grayscale bitmaps, scrolling) since unbuffered mode is better suited for non-animated graphics (JPEG viewer, mandelbrot) and saves some RAM, which is important on Archos. (3) Put all functions in a couple of source files, no more one-function-per-files. This became possible since sectioned compilation for the plugin library and appropriate linking for the pluginswas introduced, otherwise the binaries would be bloated by unused functions.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7241 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/plugins/lib/gray_drawline.c')
-rw-r--r--apps/plugins/lib/gray_drawline.c119
1 files changed, 0 insertions, 119 deletions
diff --git a/apps/plugins/lib/gray_drawline.c b/apps/plugins/lib/gray_drawline.c
deleted file mode 100644
index 5ec4967c14..0000000000
--- a/apps/plugins/lib/gray_drawline.c
+++ /dev/null
@@ -1,119 +0,0 @@
1/***************************************************************************
2* __________ __ ___.
3* Open \______ \ ____ ____ | | _\_ |__ _______ ___
4* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7* \/ \/ \/ \/ \/
8* $Id$
9*
10* Grayscale framework
11* gray_drawline() function
12*
13* This is a generic framework to use grayscale display within Rockbox
14* plugins. It obviously does not work for the player.
15*
16* Copyright (C) 2004 Jens Arnold
17*
18* All files in this archive are subject to the GNU General Public License.
19* See the file COPYING in the source tree root for full license agreement.
20*
21* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
22* KIND, either express or implied.
23*
24****************************************************************************/
25
26#ifndef SIMULATOR /* not for simulator by now */
27#include "plugin.h"
28
29#ifdef HAVE_LCD_BITMAP /* and also not for the Player */
30#include "gray.h"
31
32/*---------------------------------------------------------------------------
33 Draw a line from (x1, y1) to (x2, y2) with the current drawinfo
34 ----------------------------------------------------------------------------
35 See gray_drawpixel() for details
36 */
37void gray_drawline(int x1, int y1, int x2, int y2)
38{
39 int numpixels;
40 int i;
41 int deltax, deltay;
42 int d, dinc1, dinc2;
43 int x, xinc1, xinc2;
44 int y, yinc1, yinc2;
45 unsigned long pattern;
46 void (*pixelfunc)(int x, int y, unsigned long pattern);
47
48 if ((unsigned) x1 >= (unsigned) _graybuf->width
49 || (unsigned) y1 >= (unsigned) _graybuf->height
50 || (unsigned) x2 >= (unsigned) _graybuf->width
51 || (unsigned) y2 >= (unsigned) _graybuf->height)
52 return;
53
54 deltax = abs(x2 - x1);
55 deltay = abs(y2 - y1);
56 xinc2 = 1;
57 yinc2 = 1;
58
59 if (deltax >= deltay)
60 {
61 numpixels = deltax;
62 d = 2 * deltay - deltax;
63 dinc1 = deltay * 2;
64 dinc2 = (deltay - deltax) * 2;
65 xinc1 = 1;
66 yinc1 = 0;
67 }
68 else
69 {
70 numpixels = deltay;
71 d = 2 * deltax - deltay;
72 dinc1 = deltax * 2;
73 dinc2 = (deltax - deltay) * 2;
74 xinc1 = 0;
75 yinc1 = 1;
76 }
77 numpixels++; /* include endpoints */
78
79 if (x1 > x2)
80 {
81 xinc1 = -xinc1;
82 xinc2 = -xinc2;
83 }
84
85 if (y1 > y2)
86 {
87 yinc1 = -yinc1;
88 yinc2 = -yinc2;
89 }
90
91 x = x1;
92 y = y1;
93
94 pixelfunc = _gray_pixelfuncs[_graybuf->drawmode];
95 pattern = (_graybuf->drawmode == GRAY_DRAW_BG) ?
96 _graybuf->bg_pattern : _graybuf->fg_pattern;
97
98 for (i = 0; i < numpixels; i++)
99 {
100 pixelfunc(x, y, pattern);
101
102 if (d < 0)
103 {
104 d += dinc1;
105 x += xinc1;
106 y += yinc1;
107 }
108 else
109 {
110 d += dinc2;
111 x += xinc2;
112 y += yinc2;
113 }
114 }
115}
116
117#endif // #ifdef HAVE_LCD_BITMAP
118#endif // #ifndef SIMULATOR
119