CCOSS/GUI/AllegroScreen.cpp at master · DataRealms/CCOSS · GitHub

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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
//////////////////////////////////////////////////////////////////////////////////////////
// File:            AllegroScreen.h
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     AllegroScreen class
// Project:         GUI Library
// Author(s):       Jason Boettcher
//                  jackal@shplorb.com
//                  www.shplorb.com/~jackal


//////////////////////////////////////////////////////////////////////////////////////////
// Inclusions of header files

#include "GUI.h"
#include "AllegroScreen.h"
#include "AllegroBitmap.h"

#include "allegro.h"

using namespace RTE;


//////////////////////////////////////////////////////////////////////////////////////////
// Constructor:     AllegroScreen
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     Constructor method used to instantiate a AllegroScreen object in system
//                  memory.

AllegroScreen::AllegroScreen(BITMAP *pBackBuffer)
{
    // Create the bitmap interface from the screen's back buffer
    m_pBackBitmap = new AllegroBitmap(pBackBuffer);
}


//////////////////////////////////////////////////////////////////////////////////////////
// Method:          Destroy
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     Destroy the screen

void AllegroScreen::Destroy(void)
{
    delete m_pBackBitmap;
    m_pBackBitmap = 0;
}


//////////////////////////////////////////////////////////////////////////////////////////
// Method:          CreateBitmap
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     Creates a bitmap from a file

GUIBitmap * AllegroScreen::CreateBitmap(const std::string Filename)
{
    AllegroBitmap *pABitmap = new AllegroBitmap();
    if (!pABitmap)
        return 0;

    // Load from file
    if (!pABitmap->Create(Filename)) {
        delete pABitmap;
        return 0;
    }

    return pABitmap;
}


//////////////////////////////////////////////////////////////////////////////////////////
// Method:          CreateBitmap
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     Creates an empty bitmap

GUIBitmap * AllegroScreen::CreateBitmap(int Width, int Height)
{
    AllegroBitmap *pABitmap = new AllegroBitmap();
    if (!pABitmap)
        return 0;

    // Create it, using the same color depth as the screen
    if (!pABitmap->Create(Width, Height, bitmap_color_depth(m_pBackBitmap->GetBitmap()))) {
        delete pABitmap;
        return 0;
    }

    return pABitmap;
}


//////////////////////////////////////////////////////////////////////////////////////////
// Method:          DrawBitmap
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     Draws a bitmap onto the back buffer

void AllegroScreen::DrawBitmap(GUIBitmap *pGUIBitmap, int destX, int destY, RECT *pRect)
{
    if (!pGUIBitmap)
        return;

    BITMAP *pSourceBitmap = ((AllegroBitmap *)pGUIBitmap)->GetBitmap();

    if (!pSourceBitmap)
        return;

    if (pRect)
        blit(pSourceBitmap, m_pBackBitmap->GetBitmap(), pRect->left, pRect->top, destX, destY, pRect->right - pRect->left, pRect->bottom - pRect->top);
    else
        blit(pSourceBitmap, m_pBackBitmap->GetBitmap(), 0, 0, destX, destY, pSourceBitmap->w, pSourceBitmap->h);
}


//////////////////////////////////////////////////////////////////////////////////////////
// Method:          DrawBitmapTrans
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     Draws a bitmap onto the back buffer using the colorkey.

void AllegroScreen::DrawBitmapTrans(GUIBitmap *pGUIBitmap, int destX, int destY, RECT *pRect)
{
    if (!pGUIBitmap)
        return;

    BITMAP *pSourceBitmap = ((AllegroBitmap *)pGUIBitmap)->GetBitmap();

    if (!pSourceBitmap)
        return;

    if (pRect)
        masked_blit(pSourceBitmap, m_pBackBitmap->GetBitmap(), pRect->left, pRect->top, destX, destY, pRect->right - pRect->left, pRect->bottom - pRect->top);
    else
        masked_blit(pSourceBitmap, m_pBackBitmap->GetBitmap(), 0, 0, destX, destY, pSourceBitmap->w, pSourceBitmap->h);
}


//////////////////////////////////////////////////////////////////////////////////////////
// Method:          GetBitmap
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     Gets a bitmap representing the screen.

GUIBitmap * AllegroScreen::GetBitmap(void)
{
    return m_pBackBitmap;
}


//////////////////////////////////////////////////////////////////////////////////////////
// Method:          ConvertColor
//////////////////////////////////////////////////////////////////////////////////////////
// Description:     Converts an 8bit palette index to a valid pixel format.
//                  Primarily used for development in windowed mode.

Uint32 AllegroScreen::ConvertColor(Uint32 color, int targetDepth)
{
    // If no target to shoot for, use the current video mode depth
    if (targetDepth == 0)
        targetDepth = get_color_depth();

    // We need to end up with palettized color
    if (targetDepth == 8)
    {
        // Isn't indexed, don't convert
        if (!(color >= 0 && color <= 255))
            color = makecol8(getr32(color), getg32(color), getb32(color));
    }
    // We need a 32bpp color
    else
    {
        // Indexed? Convert
        if (color >= 0 && color <= 255)
        {
            RGB rgbEntry;
            get_color(color, &rgbEntry);
            // Times 4 because RGB struct's elements are in range 0-63, and makecol needs 0-255
            color = makecol(rgbEntry.r * 4, rgbEntry.g * 4, rgbEntry.b * 4);
        }
    }

    // Return converted color
    return color;
}