vcm/GridHelper.cpp at master · Vapoursynth-Plugins-Gitify/vcm · 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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199

	// declarations
	template < typename finc>
	void drawVBoldLine( finc * dp, int length, int pitch, finc val);
	template < typename finc>
	void drawDashedLine( finc * dp, int length, int pitch, finc val, int ldash);
	template < typename finc>
	void drawDottedLine( finc * dp, int length, int pitch, finc val);
	template < typename finc>
	void DrawGridLines(finc * dp, int dpitch, int wd, int ht, int kb,
						int modbold, int moddash, int ginterval,
						finc bold, finc dash, finc dot,
						int ldash, int ldot);
	template < typename finc>
	void DrawCenteredGridLines(finc * dp, int dpitch, int wd, int ht, int kb,
		int modbold, int moddash, int ginterval,
		finc bold, finc dash, finc dot,
		int ldash, int ldot);

	template < typename finc>
	void DrawAxisScale( finc * dp, int dpitch, int wd, int ht, int kb,
							int modbold, int moddash, int ginterval,
							finc bold, finc dash, finc dot,
							int lbold, int ldash, int ldot);


/*************************************************
 * The following is the implementation
 * of the defined functions.
 *************************************************/
//................................................
template < typename finc>
void drawVBoldLine( finc * dp, int length, int pitch, finc val)
{

	for ( int i = 0; i < length; i ++, dp += pitch)

		dp[0] = val;
}

//........................................................................................

template < typename finc>
void drawDashedLine( finc * dp, int length, int pitch, finc val, int ldash)
{

	for ( int l = 0, lpitch = 0; l < length; l += ldash + ldash)

		for( int m = 0, lpitch = l * pitch; m < ldash; m ++, lpitch += pitch)

			dp[lpitch] = val;
}

//.................................................................................................

template < typename finc>
void DrawGridLines(finc * dp, int dpitch, int wd, int ht, int kb,
						int modbold, int moddash, int ginterval,
						finc bold, finc dash, finc dot,
						int ldash, int ldot)
{
	int gridpitch = ginterval * dpitch;

	for(int h = 0, hdpitch = 0 ; h < ht; h += ginterval, hdpitch += gridpitch)
	{

		if((h % modbold) == 0)
		{
					// draw full lines

			drawVBoldLine(dp + hdpitch, wd, kb, bold);	// luma

			continue;
		}

		else if((h % moddash) == 0)
		{
						// draw dashed line 4 pixels dash, 4 pixels gap

			drawDashedLine(dp + hdpitch, wd, kb, dash, ldash);

			continue;
		}

		else

					// dotted line
			drawDashedLine( dp + hdpitch, wd, kb, dot, ldot);

	}
}

//---------------------------------------------------------------------------------------------
template < typename finc>
void DrawCenteredGridLines(finc * dp, int dpitch, int wd, int ht, int kb,
	int modbold, int moddash, int ginterval,
	finc bold, finc dash, finc dot,
	int ldash, int ldot)
{
	// dp is placed on start of central grid line, ht is half height
	int gridpitch = ginterval * dpitch;

	for (int h = 0, hdpitch = 0; h < ht; h += ginterval, hdpitch += gridpitch)
	{

		if ((h % modbold) == 0)
		{
			// draw full lines

			drawVBoldLine(dp + hdpitch, wd, kb, bold);	// luma
			drawVBoldLine(dp - hdpitch, wd, kb, bold);	// luma

			continue;
		}

		else if ((h % moddash) == 0)
		{
			// draw dashed line 4 pixels dash, 4 pixels gap

			drawDashedLine(dp + hdpitch, wd, kb, dash, ldash);
			drawDashedLine(dp - hdpitch, wd, kb, dash, ldash);

			continue;
		}

		else

			// dotted line
			drawDashedLine(dp + hdpitch, wd, kb, dot, ldot);
			drawDashedLine(dp - hdpitch, wd, kb, dot, ldot);

	}
}

//.............................................................................................

template < typename finc>
void DrawAxisScale( finc * dp, int dpitch, int wd, int ht, int kb,
							int modbold, int moddash, int ginterval,
							finc bold, finc dash, finc dot,
							int lbold, int ldash, int ldot)
{
	int gridpitch = ginterval * dpitch;

	int center = ht / 2 * dpitch;

	for(int h = 0, hdpitch = 0; h < ht / 2; h += ginterval, hdpitch += gridpitch)

	if((h % modbold) == 0)
	{
								// draw a horizontal line of length lbold
		drawVBoldLine(dp + center + hdpitch  - lbold /2  * kb, lbold, kb, bold);

		drawVBoldLine(dp + center - hdpitch  - lbold /2  * kb, lbold, kb, bold);


			continue;
	}

	else if((h % moddash)==0)
	{
		drawVBoldLine(dp + center + hdpitch  - ldash/2 * kb, ldash, kb, dash);

		drawVBoldLine(dp + center - hdpitch  - ldash/2 * kb, ldash, kb, dash);

		continue;

	}

	else
	{

		drawVBoldLine(dp + center + hdpitch  - ldot/2 * kb, ldot, kb, dot);

		drawVBoldLine(dp + center - hdpitch  - ldot/2 * kb, ldot, kb, dot);
	}

}

//...........................................................................................
void getComponentsRGB( uint8_t * cp, int RGB)
{
	cp[2] = RGB & 255;			// blue
	cp[1] = (RGB >> 8) & 255;	// green
	cp[0] = (RGB >> 16) & 255;	//red
}

void getYUVfromRGB( uint8_t * yp, int RGB)
{

	uint8_t blue = RGB & 255;	//blue
	uint8_t green = (RGB >> 8) & 255;	// green
	uint8_t red = (RGB >> 16) & 255;	// red

	yp[0] = 0.299*red+0.587*green+0.114*blue;	// y
	yp[1] = -0.169*red-0.332*green+0.5*blue+128;	// u
	yp[2] = 0.5*red-green*0.419-blue*0.0813+128;	// v
}