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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ags/shared/ac/common.h"
#include "ags/engine/ac/draw.h"
#include "ags/shared/ac/game_setup_struct.h"
#include "ags/engine/ac/sprite.h"
#include "ags/engine/ac/system.h"
#include "ags/engine/platform/base/ags_platform_driver.h"
#include "ags/plugins/ags_plugin_evts.h"
#include "ags/plugins/plugin_engine.h"
#include "ags/shared/gfx/bitmap.h"
#include "ags/engine/gfx/graphics_driver.h"
namespace AGS3 {
using namespace AGS::Shared;
using namespace AGS::Engine;
Size get_new_size_for_sprite(const Size &size, const uint32_t sprite_flags) {
if (!_GP(game).AllowRelativeRes() || ((sprite_flags & SPF_VAR_RESOLUTION) == 0))
return size;
Size newsz = size;
ctx_data_to_game_size(newsz.Width, newsz.Height, ((sprite_flags & SPF_HIRES) != 0));
return newsz;
}
// from is a 32-bit RGBA image, to is a 15/16/24-bit destination image
Bitmap *remove_alpha_channel(Bitmap *from) {
const int game_cd = _GP(game).GetColorDepth();
Bitmap *to = BitmapHelper::CreateBitmap(from->GetWidth(), from->GetHeight(), game_cd);
const int maskcol = to->GetMaskColor();
int y, x;
unsigned int c, b, g, r;
if (game_cd == 24) { // 32-to-24
for (y = 0; y < from->GetHeight(); y++) {
unsigned int *psrc = (unsigned int *)from->GetScanLine(y);
unsigned char *pdest = (unsigned char *)to->GetScanLine(y);
for (x = 0; x < from->GetWidth(); x++) {
c = psrc[x];
// less than 50% opaque, remove the pixel
if (((c >> 24) & 0x00ff) < 128)
c = maskcol;
// copy the RGB values across
memcpy(&pdest[x * 3], &c, 3);
}
}
} else if (game_cd > 8) { // 32 to 15 or 16
for (y = 0; y < from->GetHeight(); y++) {
unsigned int *psrc = (unsigned int *)from->GetScanLine(y);
unsigned short *pdest = (unsigned short *)to->GetScanLine(y);
for (x = 0; x < from->GetWidth(); x++) {
c = psrc[x];
// less than 50% opaque, remove the pixel
if (((c >> 24) & 0x00ff) < 128)
pdest[x] = maskcol;
else {
// otherwise, copy it across
r = (c >> 16) & 0x00ff;
g = (c >> 8) & 0x00ff;
b = c & 0x00ff;
pdest[x] = makecol_depth(game_cd, r, g, b);
}
}
}
} else { // 32 to 8-bit game
// TODO: consider similar to above approach if this becomes a wanted feature
to->Blit(from);
}
return to;
}
Bitmap *initialize_sprite(sprkey_t index, Bitmap *image, uint32_t &sprite_flags) {
int oldeip = get_our_eip();
set_our_eip(4300);
if (sprite_flags & SPF_HADALPHACHANNEL) {
// we stripped the alpha channel out last time, put
// it back so that we can remove it properly again
// CHECKME: find out what does this mean, and explain properly
sprite_flags |= SPF_ALPHACHANNEL;
}
// stretch sprites to correct resolution
Size newsz = get_new_size_for_sprite(image->GetSize(), sprite_flags);
_G(eip_guinum) = index;
_G(eip_guiobj) = newsz.Width;
Bitmap *use_bmp = image;
if (newsz != image->GetSize()) {
use_bmp = new Bitmap(newsz.Width, newsz.Height, image->GetColorDepth());
use_bmp->StretchBlt(image, RectWH(0, 0, use_bmp->GetWidth(), use_bmp->GetHeight()));
delete image;
}
use_bmp = PrepareSpriteForUse(use_bmp, (sprite_flags & SPF_ALPHACHANNEL) != 0);
if (_GP(game).GetColorDepth() < 32) {
sprite_flags &= ~SPF_ALPHACHANNEL;
// save the fact that it had one for the next time this is re-loaded from disk
// CHECKME: find out what does this mean, and explain properly
sprite_flags |= SPF_HADALPHACHANNEL;
}
set_our_eip(oldeip);
return use_bmp;
}
void post_init_sprite(sprkey_t index) {
pl_run_plugin_hooks(AGSE_SPRITELOAD, index);
}
} // namespace AGS3
|
