ref: 397aad3ec28020a9b766e362e061701783c9633e
dir: /vp8/common/textblit.c/
/*
* Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
void vp8_blit_text(const char *msg, unsigned char *address, const int pitch)
{
int letter_bitmap;
unsigned char *output_pos = address;
int colpos;
const int font[] =
{
0x0, 0x5C00, 0x8020, 0xAFABEA, 0xD7EC0, 0x1111111, 0x1855740, 0x18000,
0x45C0, 0x74400, 0x51140, 0x23880, 0xC4000, 0x21080, 0x80000, 0x111110,
0xE9D72E, 0x87E40, 0x12AD732, 0xAAD62A, 0x4F94C4, 0x4D6B7, 0x456AA,
0x3E8423, 0xAAD6AA, 0xAAD6A2, 0x2800, 0x2A00, 0x8A880, 0x52940, 0x22A20,
0x15422, 0x6AD62E, 0x1E4A53E, 0xAAD6BF, 0x8C62E, 0xE8C63F, 0x118D6BF,
0x1094BF, 0xCAC62E, 0x1F2109F, 0x118FE31, 0xF8C628, 0x8A89F, 0x108421F,
0x1F1105F, 0x1F4105F, 0xE8C62E, 0x2294BF, 0x164C62E, 0x12694BF, 0x8AD6A2,
0x10FC21, 0x1F8421F, 0x744107, 0xF8220F, 0x1151151, 0x117041, 0x119D731,
0x47E0, 0x1041041, 0xFC400, 0x10440, 0x1084210, 0x820
};
colpos = 0;
while (msg[colpos] != 0)
{
char letter = msg[colpos];
int fontcol, fontrow;
if (letter <= 'Z' && letter >= ' ')
letter_bitmap = font[letter-' '];
else if (letter <= 'z' && letter >= 'a')
letter_bitmap = font[letter-'a'+'A' - ' '];
else
letter_bitmap = font[0];
for (fontcol = 6; fontcol >= 0 ; fontcol--)
for (fontrow = 0; fontrow < 5; fontrow++)
output_pos[fontrow *pitch + fontcol] =
((letter_bitmap >> (fontcol * 5)) & (1 << fontrow) ? 255 : 0);
output_pos += 7;
colpos++;
}
}