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This thread is locked; no one can reply to it.
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| Framebuffer? |
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Eric Johnson
Member #14,841
January 2013
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Ha ha; Trent, you rock! There it is: wiz_display_fb, wiz_display_opengl, wiz_joystick, and wiz_system! [EDIT]
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Elias
Member #358
May 2000
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Allegro uses OpenGL ES. But if I understand this thread right, the question is whether OpenGL ES (not Allegro) can work with your monitor (since it might just send the data to the HDMI port). -- |
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Eric Johnson
Member #14,841
January 2013
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Oh, I see. Thanks, Elias. Then scratch the GL and GL ES whatnots. I'm looking at the GP2X files now. [EDIT]
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Trent Gamblin
Member #261
April 2000
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In those blog posts I made is the important stuff you need. There should be a libwiz or something like that attached to one post. That has the main bulk of the framebuffer code. Actually it's based on libcastor which you can probably find for wiz.
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Eric Johnson
Member #14,841
January 2013
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I haven't yet found the attached file(s) you speak of (still browsing the blog), but I did find libcastor 0.2, which debuted on January the 26th, of 2009. The contents of the libcastor files are opaque to me; I understand C's constructs and whatnot, but it's difficult to follow... Aah, I see there's a readme with documentation links. I'll explore those for a while. [EDIT]
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Trent Gamblin
Member #261
April 2000
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I modified libcastor but only slightly. You should be able to start with that and work from there.
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Eric Johnson
Member #14,841
January 2013
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Sounds good; thanks, Trent. I don't quite know where to start with this, but I'll give it a go and play with it for a while. Also, on an off-topic question: how long must a thread remain untouched for it to be locked by the system? I've gone places before and left threads for a while, only to return and have them locked. I'd rather than not happen here.
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Vanneto
Member #8,643
May 2007
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Threads get locked after 1 week of inactivity. But opening a new thread is no problem and is even encouraged. So don't worry man. In capitalist America bank robs you. |
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Arthur Kalliokoski
Second in Command
February 2005
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The stale threads are locked to avoid people dredging up stuff that's several months or years old, and nobody cares about them anymore. But if you have something truly valuable to say, go ahead and make a new thread. They all watch too much MSNBC... they get ideas. |
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Eric Johnson
Member #14,841
January 2013
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Thanks for clearing that up for me!
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Thomas Fjellstrom
Member #476
June 2000
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If the thread was locked my a moderator, then yes, continuing it in the same way the thread ended would be seen as spam or against the rules. But even in the case it was locked by a moderator, if you continue it on topic, (threads usually get locked by a mod after they go way off topic) then its ok. The rules here are fairly lax. -- |
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Eric Johnson
Member #14,841
January 2013
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That's good to know, Thomas; thank you. Trent, I found some files pertaining to the Wiz on your blog. I don't know if they are the correct files, but they're the only ones I've found so far. I'm looking them over now, trying to make sense of them. There is hope yet. [EDIT] 1#include "allegro5/allegro5.h"
2#include "allegro5/a5_iio.h"
3#include "allegro5/a5_primitives.h"
4
5#include <stdio.h>
6#include <stdarg.h>
7
8int main(void)
9{
10 al_init();
11 al_init_iio_addon();
12
13 al_create_display(320, 240);
14 ALLEGRO_BITMAP *bmp = al_load_bitmap("rock.tga");
15
16 int i;
17 const int NUM = 250;
18
19 ALLEGRO_VERTEX v[NUM*6];
20
21 struct Info {
22 float dx, dy;
23 float a;
24 float maxscale;
25 float currscale;
26 float ds;
27 float x, y;
28 } info[NUM];
29
30 for (i = 0; i < NUM; i++) {
31 int w = al_get_bitmap_width(bmp);
32 int h = al_get_bitmap_height(bmp);
33 v[i*6].x = 0;
34 v[i*6].y = h;
35 v[i*6].u = 0;
36 v[i*6].v = 0;
37 v[i*6].color = al_get_prim_color(al_map_rgb(255, 255, 255));
38
39 v[i*6+1].x = 0;
40 v[i*6+1].y = 0;
41 v[i*6+1].u = 0;
42 v[i*6+1].v = 1;
43 v[i*6+1].color = al_get_prim_color(al_map_rgb(255, 255, 255));
44
45 v[i*6+2].x = w;
46 v[i*6+2].y = h;
47 v[i*6+2].u = 1;
48 v[i*6+2].v = 0;
49 v[i*6+2].color = al_get_prim_color(al_map_rgb(255, 255, 255));
50
51
52 v[i*6+3].x = w;
53 v[i*6+3].y = 0;
54 v[i*6+3].u = 1;
55 v[i*6+3].v = 1;
56 v[i*6+3].color = al_get_prim_color(al_map_rgb(255, 255, 255));
57
58
59 v[i*6+4].x = 0;
60 v[i*6+4].y = 0;
61 v[i*6+4].u = 0;
62 v[i*6+4].v = 1;
63 v[i*6+4].color = al_get_prim_color(al_map_rgb(255, 255, 255));
64
65
66 v[i*6+5].x = w;
67 v[i*6+5].y = h;
68 v[i*6+5].u = 1;
69 v[i*6+5].v = 0;
70 v[i*6+5].color = al_get_prim_color(al_map_rgb(255, 255, 255));
71
72 info[i].dx = rand() % 3 - 1 * ((rand() % RAND_MAX) / (float)RAND_MAX * 2);
73 info[i].dy = rand() % 3 - 1 * ((rand() % RAND_MAX) / (float)RAND_MAX * 2);
74
75 info[i].a = (float)((rand() % RAND_MAX) / (float)RAND_MAX) * 0.2f;
76 info[i].maxscale = ((rand() % RAND_MAX) / (float)RAND_MAX) * 4 + 4;
77 info[i].ds = rand() % 2 ? 0.95f : 1.05f;
78 info[i].currscale = 1;
79
80 info[i].x = rand() % 320;
81 info[i].y = rand() % 240;
82 }
83
84 long now = al_current_time();
85
86 for (i = 0; i < 60*10; i++) {
87 al_clear_to_color(al_map_rgb(0, 0, 0));
88 int j;
89 for (j = 0; j < NUM; j++) {
90 info[j].currscale *= info[j].ds;
91 if (info[j].ds < 1) {
92 if (info[j].currscale < 1) {
93 info[j].ds = 1.05f;
94 info[j].currscale = 1;
95 }
96 }
97 else {
98 if (info[j].currscale > info[j].maxscale) {
99 info[j].ds = 0.95f;
100 info[j].currscale = info[j].maxscale;
101 }
102 }
103
104 ALLEGRO_TRANSFORM t;
105 al_identity_transform(&t);
106 al_translate_transform(&t, -v[j*6+1].x-8, -v[j*6+1].y-8);
107 int k;
108 for (k = 0; k < 6; k++) {
109 al_transform_vertex(&t, &v[j*6+k]);
110 }
111 al_build_transform(&t, info[j].x+8, info[j].y+8, info[j].ds,
112 info[j].ds, info[j].a);
113 for (k = 0; k < 6; k++) {
114 al_transform_vertex(&t, &v[j*6+k]);
115 }
116
117 info[j].x += info[j].dx * 0.4f;
118 info[j].y += info[j].dy * 0.4f;
119
120 if (info[j].x < 0)
121 info[j].dx = -info[j].dx;
122 else if (info[j].x > 320)
123 info[j].dx = -info[j].dx;
124
125 if (info[j].y > 240)
126 info[j].dy = -info[j].dy;
127 else if (info[j].y < 0)
128 info[j].dy = -info[j].dy;
129 }
130 al_draw_prim(v, bmp, 0, NUM*6, ALLEGRO_PRIM_TRIANGLE_LIST);
131 al_flip_display();
132 }
133
134 long end = al_current_time();
135 printf("FPS=%d\n", (int)(600/(end-now)));
136
137 al_uninstall_system();
138
139 return 0;
140}
141END_OF_MAIN()
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Trent Gamblin
Member #261
April 2000
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Well, there's no point in me looking up my modified version of libcastor really. All it did was combine the OpenGL libraries and libcastor and clean it up a little but that's mostly Wiz specific. If you're serious about writing a framebuffer driver, look into SDL's framebuffer code, or optionally libcastor's. When you get that far, the attached file might help with optimization (too big to inline.) That is one file that was removed from the Allegro repo. I believe I got 30-60 fps on Wiz (a very slow system) with these routines.
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Eric Johnson
Member #14,841
January 2013
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I am serious about this, as it'd be quite helpful to me. [EDIT]
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What I'm really here for is the wiz_display_fb, right; you think it could be modified to support what I have going on?
On other forums, posting new topics that continue threads which have been locked is deemed as spam, so I wasn't sure. Thanks for the input.
