summaryrefslogtreecommitdiffstats
path: root/src/common/emu_window.cpp
blob: f5b6c7301da95a2ba94cbbc283f708491d3dc2fc (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#include "emu_window.h"
#include "video_core/video_core.h"

void EmuWindow::KeyPressed(KeyMap::HostDeviceKey key) {
    pad_state.hex |= KeyMap::GetPadKey(key).hex;
}

void EmuWindow::KeyReleased(KeyMap::HostDeviceKey key) {
    pad_state.hex &= ~KeyMap::GetPadKey(key).hex;
}

/**
 * Check if the given x/y coordinates are within the touchpad specified by the framebuffer layout
 * @param layout FramebufferLayout object describing the framebuffer size and screen positions
 * @param framebuffer_x Framebuffer x-coordinate to check
 * @param framebuffer_y Framebuffer y-coordinate to check
 * @return True if the coordinates are within the touchpad, otherwise false
 */
static bool IsWithinTouchscreen(const EmuWindow::FramebufferLayout& layout, unsigned framebuffer_x,
                                unsigned framebuffer_y) {
    return (framebuffer_y >= layout.bottom_screen.top    &&
            framebuffer_y <  layout.bottom_screen.bottom &&
            framebuffer_x >= layout.bottom_screen.left   &&
            framebuffer_x <  layout.bottom_screen.right);
}

std::tuple<unsigned,unsigned> EmuWindow::ClipToTouchScreen(unsigned new_x, unsigned new_y) {

    new_x = std::max(new_x, framebuffer_layout.bottom_screen.left);
    new_x = std::min(new_x, framebuffer_layout.bottom_screen.right-1);
    
    new_y = std::max(new_y, framebuffer_layout.bottom_screen.top);
    new_y = std::min(new_y, framebuffer_layout.bottom_screen.bottom-1);

    return std::make_tuple(new_x, new_y);
}

void EmuWindow::TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y) {
    if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
        return;

    touch_x = VideoCore::kScreenBottomWidth * (framebuffer_x - framebuffer_layout.bottom_screen.left) /
        (framebuffer_layout.bottom_screen.right - framebuffer_layout.bottom_screen.left);
    touch_y = VideoCore::kScreenBottomHeight * (framebuffer_y - framebuffer_layout.bottom_screen.top) /
        (framebuffer_layout.bottom_screen.bottom - framebuffer_layout.bottom_screen.top);

    touch_pressed = true;
    pad_state.touch = 1;
}

void EmuWindow::TouchReleased() {
    touch_pressed = false;
    touch_x = 0;
    touch_y = 0;
    pad_state.touch = 0;
}

void EmuWindow::TouchMoved(unsigned framebuffer_x, unsigned framebuffer_y) {
    if (!touch_pressed)
        return;

    if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
        std::tie(framebuffer_x, framebuffer_y) = ClipToTouchScreen(framebuffer_x, framebuffer_y);

    TouchPressed(framebuffer_x, framebuffer_y);
}

EmuWindow::FramebufferLayout EmuWindow::FramebufferLayout::DefaultScreenLayout(unsigned width, unsigned height) {

    ASSERT(width > 0);
    ASSERT(height > 0);

    EmuWindow::FramebufferLayout res = { width, height, {}, {} };

    float window_aspect_ratio = static_cast<float>(height) / width;
    float emulation_aspect_ratio = static_cast<float>(VideoCore::kScreenTopHeight * 2) /
        VideoCore::kScreenTopWidth;

    if (window_aspect_ratio > emulation_aspect_ratio) {
        // Window is narrower than the emulation content => apply borders to the top and bottom
        int viewport_height = static_cast<int>(std::round(emulation_aspect_ratio * width));

        res.top_screen.left = 0;
        res.top_screen.right = res.top_screen.left + width;
        res.top_screen.top = (height - viewport_height) / 2;
        res.top_screen.bottom = res.top_screen.top + viewport_height / 2;

        int bottom_width = static_cast<int>((static_cast<float>(VideoCore::kScreenBottomWidth) /
            VideoCore::kScreenTopWidth) * (res.top_screen.right - res.top_screen.left));
        int bottom_border = ((res.top_screen.right - res.top_screen.left) - bottom_width) / 2;

        res.bottom_screen.left = bottom_border;
        res.bottom_screen.right = res.bottom_screen.left + bottom_width;
        res.bottom_screen.top = res.top_screen.bottom;
        res.bottom_screen.bottom = res.bottom_screen.top + viewport_height / 2;
    } else {
        // Otherwise, apply borders to the left and right sides of the window.
        int viewport_width = static_cast<int>(std::round(height / emulation_aspect_ratio));

        res.top_screen.left = (width - viewport_width) / 2;
        res.top_screen.right = res.top_screen.left + viewport_width;
        res.top_screen.top = 0;
        res.top_screen.bottom = res.top_screen.top + height / 2;

        int bottom_width = static_cast<int>((static_cast<float>(VideoCore::kScreenBottomWidth) /
            VideoCore::kScreenTopWidth) * (res.top_screen.right - res.top_screen.left));
        int bottom_border = ((res.top_screen.right - res.top_screen.left) - bottom_width) / 2;

        res.bottom_screen.left = res.top_screen.left + bottom_border;
        res.bottom_screen.right = res.bottom_screen.left + bottom_width;
        res.bottom_screen.top = res.top_screen.bottom;
        res.bottom_screen.bottom = res.bottom_screen.top + height / 2;
    }

    return res;
}