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
|
/* 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/>.
*
*/
//=============================================================================
//
// Intermediate level drawing utility functions.
//
// GfxUtil namespace is meant for intermediate-to-lower level functions, that
// implement specific conversions, tricks and hacks for drawing bitmaps and
// geometry.
// The suggested convention is to add only those functions, that do not require
// any knowledge of higher-level engine types and objects.
//
//=============================================================================
#ifndef AGS_ENGINE_GFX_GFX_UTIL_H
#define AGS_ENGINE_GFX_GFX_UTIL_H
#include "ags/shared/gfx/bitmap.h"
#include "ags/shared/gfx/gfx_def.h"
namespace AGS3 {
namespace AGS {
namespace Engine {
using Shared::Bitmap;
namespace GfxUtil {
// Creates a COPY of the source bitmap, converted to the given format.
// Keeps mask pixels intact, only converting mask color value if necessary.
Bitmap *ConvertBitmap(Bitmap *src, int dst_color_depth);
// Considers the given information about source and destination surfaces,
// then draws a bimtap over another either using requested blending mode,
// or fallbacks to common "magic pink" transparency mode;
// optionally uses blending alpha (overall image transparency).
void DrawSpriteBlend(Bitmap *ds, const Point &ds_at, Bitmap *sprite,
Shared::BlendMode blend_mode, bool dst_has_alpha = true, bool src_has_alpha = true, int blend_alpha = 0xFF);
// Draws a bitmap over another one with given alpha level (0 - 255),
// takes account of the bitmap's mask color,
// ignores image's alpha channel, even if there's one;
// does a conversion if sprite and destination color depths do not match.
void DrawSpriteWithTransparency(Bitmap *ds, Bitmap *sprite, int x, int y, int alpha = 0xFF);
} // namespace GfxUtil
} // namespace Engine
} // namespace AGS
} // namespace AGS3
#endif
|
