Atlas - SDL_riscosevents.c
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1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "SDL_internal.h"
22
23#ifdef SDL_VIDEO_DRIVER_RISCOS
24
25#include "../../events/SDL_events_c.h"
26
27#include "SDL_riscosvideo.h"
28#include "SDL_riscosevents_c.h"
29#include "scancodes_riscos.h"
30
31#include <kernel.h>
32#include <swis.h>
33
34static SDL_Scancode SDL_RISCOS_translate_keycode(int keycode)
35{
36    SDL_Scancode scancode = SDL_SCANCODE_UNKNOWN;
37
38    if (keycode < SDL_arraysize(riscos_scancode_table)) {
39        scancode = riscos_scancode_table[keycode];
40
41#ifdef DEBUG_SCANCODES
42        if (scancode == SDL_SCANCODE_UNKNOWN) {
43            SDL_Log("The key you just pressed is not recognized by SDL: %d", keycode);
44        }
45#endif
46    }
47
48    return scancode;
49}
50
51void RISCOS_PollKeyboard(SDL_VideoDevice *_this)
52{
53    SDL_VideoData *internal = _this->internal;
54    Uint8 key = 2;
55    int i;
56
57    // Check for key releases
58    for (i = 0; i < RISCOS_MAX_KEYS_PRESSED; i++) {
59        if (internal->key_pressed[i] != 255) {
60            if ((_kernel_osbyte(129, internal->key_pressed[i] ^ 0xff, 0xff) & 0xff) != 255) {
61                SDL_SendKeyboardKey(0, SDL_DEFAULT_KEYBOARD_ID, internal->key_pressed[i], SDL_RISCOS_translate_keycode(internal->key_pressed[i]), false);
62                internal->key_pressed[i] = 255;
63            }
64        }
65    }
66
67    // Check for key presses
68    while (key < 0xff) {
69        key = _kernel_osbyte(121, key + 1, 0) & 0xff;
70        switch (key) {
71        case 255:
72        // Ignore mouse keys
73        case 9:
74        case 10:
75        case 11:
76        // Ignore keys with multiple INKEY codes
77        case 24:
78        case 40:
79        case 71:
80        case 87:
81            break;
82
83        default:
84            SDL_SendKeyboardKey(0, SDL_DEFAULT_KEYBOARD_ID, key, SDL_RISCOS_translate_keycode(key), true);
85
86            // Record the press so we can detect release later.
87            for (i = 0; i < RISCOS_MAX_KEYS_PRESSED; i++) {
88                if (internal->key_pressed[i] == key) {
89                    break;
90                }
91                if (internal->key_pressed[i] == 255) {
92                    internal->key_pressed[i] = key;
93                    break;
94                }
95            }
96        }
97    }
98}
99
100static const Uint8 mouse_button_map[] = {
101    SDL_BUTTON_RIGHT,
102    SDL_BUTTON_MIDDLE,
103    SDL_BUTTON_LEFT,
104    SDL_BUTTON_X1,
105    SDL_BUTTON_X2,
106    SDL_BUTTON_X2 + 1,
107    SDL_BUTTON_X2 + 2,
108    SDL_BUTTON_X2 + 3
109};
110
111void RISCOS_PollMouse(SDL_VideoDevice *_this)
112{
113    SDL_VideoData *internal = _this->internal;
114    SDL_Mouse *mouse = SDL_GetMouse();
115    SDL_Rect rect;
116    _kernel_swi_regs regs;
117    int i, x, y, buttons;
118
119    if (!SDL_GetDisplayBounds(SDL_GetPrimaryDisplay(), &rect)) {
120        return;
121    }
122
123    _kernel_swi(OS_Mouse, &regs, &regs);
124    x = (regs.r[0] >> 1);
125    y = rect.h - (regs.r[1] >> 1);
126    buttons = regs.r[2];
127
128    if (mouse->x != x || mouse->y != y) {
129        SDL_SendMouseMotion(0, mouse->focus, SDL_DEFAULT_MOUSE_ID, false, (float)x, (float)y);
130    }
131
132    if (internal->last_mouse_buttons != buttons) {
133        for (i = 0; i < SDL_arraysize(mouse_button_map); i++) {
134            bool down = ((buttons & (1 << i)) != 0);
135            SDL_SendMouseButton(0, mouse->focus, SDL_DEFAULT_MOUSE_ID, mouse_button_map[i], down);
136        }
137        internal->last_mouse_buttons = buttons;
138    }
139}
140
141bool RISCOS_InitEvents(SDL_VideoDevice *_this)
142{
143    SDL_VideoData *internal = _this->internal;
144    _kernel_swi_regs regs;
145    int i, status;
146
147    for (i = 0; i < RISCOS_MAX_KEYS_PRESSED; i++) {
148        internal->key_pressed[i] = 255;
149    }
150
151    status = (_kernel_osbyte(202, 0, 255) & 0xFF);
152    SDL_ToggleModState(SDL_KMOD_NUM, (status & (1 << 2)) ? false : true);
153    SDL_ToggleModState(SDL_KMOD_CAPS, (status & (1 << 4)) ? false : true);
154    SDL_ToggleModState(SDL_KMOD_SCROLL, (status & (1 << 1)) ? true : false);
155
156    _kernel_swi(OS_Mouse, &regs, &regs);
157    internal->last_mouse_buttons = regs.r[2];
158
159    // Disable escape.
160    _kernel_osbyte(229, 1, 0);
161
162    return true;
163}
164
165void RISCOS_PumpEvents(SDL_VideoDevice *_this)
166{
167    RISCOS_PollMouse(_this);
168    RISCOS_PollKeyboard(_this);
169}
170
171void RISCOS_QuitEvents(SDL_VideoDevice *_this)
172{
173    // Re-enable escape.
174    _kernel_osbyte(229, 0, 0);
175}
176
177#endif // SDL_VIDEO_DRIVER_RISCOS
178
[FILE END]
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