54d66ef165
Remove the vp9_ prefix from vp10 file names. Change-Id: I513a211b286a57d6126fc1b0fbfd6405120014f1
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2010 The WebM 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.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "vp10/common/textblit.h"
|
|
|
|
static 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
|
|
};
|
|
|
|
static void plot(int x, int y, unsigned char *image, int pitch) {
|
|
image[x + y * pitch] ^= 255;
|
|
}
|
|
|
|
void vp10_blit_text(const char *msg, unsigned char *address, const int pitch) {
|
|
int letter_bitmap;
|
|
unsigned char *output_pos = address;
|
|
int 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++;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* Bresenham line algorithm */
|
|
void vp10_blit_line(int x0, int x1, int y0, int y1, unsigned char *image,
|
|
int pitch) {
|
|
int steep = abs(y1 - y0) > abs(x1 - x0);
|
|
int deltax, deltay;
|
|
int error, ystep, y, x;
|
|
|
|
if (steep) {
|
|
int t;
|
|
t = x0;
|
|
x0 = y0;
|
|
y0 = t;
|
|
|
|
t = x1;
|
|
x1 = y1;
|
|
y1 = t;
|
|
}
|
|
|
|
if (x0 > x1) {
|
|
int t;
|
|
t = x0;
|
|
x0 = x1;
|
|
x1 = t;
|
|
|
|
t = y0;
|
|
y0 = y1;
|
|
y1 = t;
|
|
}
|
|
|
|
deltax = x1 - x0;
|
|
deltay = abs(y1 - y0);
|
|
error = deltax / 2;
|
|
|
|
y = y0;
|
|
|
|
if (y0 < y1)
|
|
ystep = 1;
|
|
else
|
|
ystep = -1;
|
|
|
|
if (steep) {
|
|
for (x = x0; x <= x1; x++) {
|
|
plot(y, x, image, pitch);
|
|
|
|
error = error - deltay;
|
|
if (error < 0) {
|
|
y = y + ystep;
|
|
error = error + deltax;
|
|
}
|
|
}
|
|
} else {
|
|
for (x = x0; x <= x1; x++) {
|
|
plot(x, y, image, pitch);
|
|
|
|
error = error - deltay;
|
|
if (error < 0) {
|
|
y = y + ystep;
|
|
error = error + deltax;
|
|
}
|
|
}
|
|
}
|
|
}
|