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
|
/* $Id$ */
/** @file 32bpp_base.hpp Base for all 32 bits blitters. */
#ifndef BLITTER_32BPP_BASE_HPP
#define BLITTER_32BPP_BASE_HPP
#include "base.hpp"
#include "../core/bitmath_func.hpp"
class Blitter_32bppBase : public Blitter {
public:
/* virtual */ uint8 GetScreenDepth() { return 32; }
// /* virtual */ void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
// /* virtual */ void DrawColorMappingRect(void *dst, int width, int height, int pal);
// /* virtual */ Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator);
/* virtual */ void *MoveTo(const void *video, int x, int y);
/* virtual */ void SetPixel(void *video, int x, int y, uint8 color);
/* virtual */ void SetPixelIfEmpty(void *video, int x, int y, uint8 color);
/* virtual */ void DrawRect(void *video, int width, int height, uint8 color);
/* virtual */ void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 color);
/* virtual */ void CopyFromBuffer(void *video, const void *src, int width, int height);
/* virtual */ void CopyToBuffer(const void *video, void *dst, int width, int height);
/* virtual */ void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
/* virtual */ void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y);
/* virtual */ int BufferSize(int width, int height);
/* virtual */ void PaletteAnimate(uint start, uint count);
/* virtual */ Blitter::PaletteAnimation UsePaletteAnimation();
/* virtual */ int GetBytesPerPixel() { return 4; }
/**
* Compose a colour based on RGB values.
*/
static inline uint32 ComposeColour(uint a, uint r, uint g, uint b)
{
return (((a) << 24) & 0xFF000000) | (((r) << 16) & 0x00FF0000) | (((g) << 8) & 0x0000FF00) | ((b) & 0x000000FF);
}
/**
* Look up the colour in the current palette.
*/
static inline uint32 LookupColourInPalette(uint index)
{
return _cur_palette[index];
}
/**
* Compose a colour based on RGBA values and the current pixel value.
*/
static inline uint32 ComposeColourRGBANoCheck(uint r, uint g, uint b, uint a, uint32 current)
{
uint cr = GB(current, 16, 8);
uint cg = GB(current, 8, 8);
uint cb = GB(current, 0, 8);
/* The 256 is wrong, it should be 255, but 256 is much faster... */
return ComposeColour(0xFF,
((int)(r - cr) * a) / 256 + cr,
((int)(g - cg) * a) / 256 + cg,
((int)(b - cb) * a) / 256 + cb);
}
/**
* Compose a colour based on RGBA values and the current pixel value.
* Handles fully transparent and solid pixels in a special (faster) way.
*/
static inline uint32 ComposeColourRGBA(uint r, uint g, uint b, uint a, uint32 current)
{
if (a == 0) return current;
if (a >= 255) return ComposeColour(0xFF, r, g, b);
return ComposeColourRGBANoCheck(r, g, b, a, current);
}
/**
* Compose a colour based on Pixel value, alpha value, and the current pixel value.
*/
static inline uint32 ComposeColourPANoCheck(uint32 colour, uint a, uint32 current)
{
uint r = GB(colour, 16, 8);
uint g = GB(colour, 8, 8);
uint b = GB(colour, 0, 8);
return ComposeColourRGBANoCheck(r, g, b, a, current);
}
/**
* Compose a colour based on Pixel value, alpha value, and the current pixel value.
* Handles fully transparent and solid pixels in a special (faster) way.
*/
static inline uint32 ComposeColourPA(uint32 colour, uint a, uint32 current)
{
if (a == 0) return current;
if (a >= 255) return (colour | 0xFF000000);
return ComposeColourPANoCheck(colour, a, current);
}
/**
* Make a pixel looks like it is transparent.
* @param colour the colour already on the screen.
* @param nom the amount of transparency, nominator, makes colour lighter.
* @param denom denominator, makes colour darker.
* @return the new colour for the screen.
*/
static inline uint32 MakeTransparent(uint32 colour, uint nom, uint denom = 256)
{
uint r = GB(colour, 16, 8);
uint g = GB(colour, 8, 8);
uint b = GB(colour, 0, 8);
return ComposeColour(0xFF, r * nom / denom, g * nom / denom, b * nom / denom);
}
/**
* Make a colour grey - based.
* @param colour the colour to make grey.
* @return the new colour, now grey.
*/
static inline uint32 MakeGrey(uint32 colour)
{
uint r = GB(colour, 16, 8);
uint g = GB(colour, 8, 8);
uint b = GB(colour, 0, 8);
/* To avoid doubles and stuff, multiple it with a total of 65536 (16bits), then
* divide by it to normalize the value to a byte again. See heightmap.cpp for
* information about the formula. */
colour = ((r * 19595) + (g * 38470) + (b * 7471)) / 65536;
return ComposeColour(0xFF, colour, colour, colour);
}
};
#endif /* BLITTER_32BPP_BASE_HPP */
|
