20 #include FT_LCD_FILTER_H
22 #include FT_INTERNAL_OBJECTS_H
25 #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
54 fir[0] = weights[2] * val1;
55 fir[1] = weights[3] * val1;
56 fir[2] = weights[4] * val1;
61 fir[0] += weights[1] * val1;
62 fir[1] += weights[2] * val1;
63 fir[2] += weights[3] * val1;
64 fir[3] += weights[4] * val1;
66 for ( xx = 2; xx <
width; xx++ )
72 pix = fir[0] + weights[0] *
val;
73 fir[0] = fir[1] + weights[1] *
val;
74 fir[1] = fir[2] + weights[2] *
val;
75 fir[2] = fir[3] + weights[3] *
val;
76 fir[3] = weights[4] *
val;
105 for ( ; width > 0; width--, column++ )
113 fir[0] = weights[2] * val1;
114 fir[1] = weights[3] * val1;
115 fir[2] = weights[4] * val1;
121 fir[0] += weights[1] * val1;
122 fir[1] += weights[2] * val1;
123 fir[2] += weights[3] * val1;
124 fir[3] += weights[4] * val1;
127 for ( yy = 2; yy <
height; yy++ )
133 pix = fir[0] + weights[0] *
val;
134 fir[0] = fir[1] + weights[1] *
val;
135 fir[1] = fir[2] + weights[2] *
val;
136 fir[2] = fir[3] + weights[3] *
val;
137 fir[3] = weights[4] *
val;
140 pix |= -( pix >> 8 );
141 col[-2 * pitch] = (
FT_Byte)pix;
150 pix |= -( pix >> 8 );
151 col[-2 * pitch] = (
FT_Byte)pix;
154 pix |= -( pix >> 8 );
166 _ft_lcd_filter_legacy(
FT_Bitmap* bitmap,
174 static const int filters[3][3] =
176 { 65538 * 9/13, 65538 * 1/6, 65538 * 1/13 },
177 { 65538 * 3/13, 65538 * 4/6, 65538 * 3/13 },
178 { 65538 * 1/13, 65538 * 1/6, 65538 * 9/13 }
195 for ( xx = 0; xx <
width; xx += 3 )
204 r += filters[0][0] *
p;
205 g += filters[0][1] *
p;
206 b += filters[0][2] *
p;
209 r += filters[1][0] *
p;
210 g += filters[1][1] *
p;
211 b += filters[1][2] *
p;
214 r += filters[2][0] *
p;
215 g += filters[2][1] *
p;
216 b += filters[2][2] *
p;
218 line[xx] = (
FT_Byte)( r / 65536 );
219 line[xx + 1] = (
FT_Byte)( g / 65536 );
220 line[xx + 2] = (
FT_Byte)( b / 65536 );
229 for ( ; width > 0; width--, column++ )
235 for ( ; col < col_end; col += 3 * pitch )
244 r += filters[0][0] *
p;
245 g += filters[0][1] *
p;
246 b += filters[0][2] *
p;
249 r += filters[1][0] *
p;
250 g += filters[1][1] *
p;
251 b += filters[1][2] *
p;
254 r += filters[2][0] *
p;
255 g += filters[2][1] *
p;
256 b += filters[2][2] *
p;
258 col[0] = (
FT_Byte)( r / 65536 );
259 col[pitch] = (
FT_Byte)( g / 65536 );
260 col[2 * pitch] = (
FT_Byte)( b / 65536 );
271 unsigned char *weights )
273 if ( !library || !weights )
276 ft_memcpy( library->lcd_weights, weights, 5 );
286 static const FT_Byte light_filter[5] =
287 { 0x00, 0x55, 0x56, 0x55, 0x00 };
290 static const FT_Byte default_filter[5] =
291 { 0x10, 0x40, 0x70, 0x40, 0x10 };
300 library->lcd_filter_func =
NULL;
301 library->lcd_extra = 0;
305 #if defined( FT_FORCE_LEGACY_LCD_FILTER )
307 library->lcd_filter_func = _ft_lcd_filter_legacy;
308 library->lcd_extra = 0;
310 #elif defined( FT_FORCE_LIGHT_LCD_FILTER )
312 ft_memcpy( library->lcd_weights, light_filter, 5 );
313 library->lcd_filter_func = _ft_lcd_filter_fir;
314 library->lcd_extra = 2;
318 ft_memcpy( library->lcd_weights, default_filter, 5 );
319 library->lcd_filter_func = _ft_lcd_filter_fir;
320 library->lcd_extra = 2;
327 ft_memcpy( library->lcd_weights, light_filter, 5 );
328 library->lcd_filter_func = _ft_lcd_filter_fir;
329 library->lcd_extra = 2;
335 library->lcd_filter_func = _ft_lcd_filter_legacy;
336 library->lcd_extra = 0;
345 library->lcd_filter =
filter;
354 unsigned char *weights )
359 return FT_Err_Unimplemented_Feature;
370 return FT_Err_Unimplemented_Feature;
FT_Library_SetLcdFilterWeights(FT_Library library, unsigned char *weights)
GLuint const GLfloat * val
GLint GLint GLint GLint GLint GLint GLint GLbitfield GLenum filter
enum FT_Render_Mode_ FT_Render_Mode
return FT_Err_Invalid_Argument
EGLSurface EGLint EGLint EGLint EGLint height
EGLSurface EGLint EGLint EGLint width
GLenum GLenum GLvoid GLvoid * column
FT_BEGIN_HEADER enum FT_LcdFilter_ FT_LcdFilter
GLdouble GLdouble GLdouble r
GLdouble GLdouble GLdouble b
GLsizei GLfixed GLfixed GLfixed GLfixed const GLubyte * bitmap
FT_Library_SetLcdFilter(FT_Library library, FT_LcdFilter filter)