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Add ff_draw_pc_font()

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Originally committed as revision 24296 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Peter Ross 2010-07-18 07:44:38 +00:00
parent ddf9dc453f
commit 9e5f3dfe25
2 changed files with 24 additions and 0 deletions
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12
libavcodec/cga_data.c
View File

@ -19,6 +19,7 @@
*/
#include <stdint.h>
#include "cga_data.h"
const uint8_t ff_cga_font[2048] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x81, 0xa5, 0x81, 0xbd, 0x99, 0x81, 0x7e,
@ -425,3 +426,14 @@ const uint32_t ff_ega_palette[64] = {
0x555500, 0x5555AA, 0x55FF00, 0x55FFAA, 0xFF5500, 0xFF55AA, 0xFFFF00, 0xFFFFAA,
0x555555, 0x5555FF, 0x55FF55, 0x55FFFF, 0xFF5555, 0xFF55FF, 0xFFFF55, 0xFFFFFF
};
void ff_draw_pc_font(uint8_t *dst, int linesize, const uint8_t *font, int font_height, int ch, int fg, int bg)
{
int char_y, mask;
for (char_y = 0; char_y < font_height; char_y++) {
for (mask = 0x80; mask; mask >>= 1) {
*dst++ = font[ch * font_height + char_y] & mask ? fg : bg;
}
dst += linesize - 8;
}
}

12
libavcodec/cga_data.h
View File

@ -28,4 +28,16 @@ extern const uint8_t ff_vga16_font[4096];
extern const uint32_t ff_cga_palette[16];
extern const uint32_t ff_ega_palette[64];
/**
* Draw CGA/EGA/VGA font to 8-bit pixel buffer
*
* @param dst Destination pixel buffer
* @param linesize Linesize (pixels)
* @param font Font table. We assume font width is always 8 pixels wide.
* @param font_height Font height (pixels)
* @param fg,bg Foreground and background palette index
* @param ch Character to draw
*/
void ff_draw_pc_font(uint8_t *dst, int linesize, const uint8_t *font, int font_height, int ch, int fg, int bg);
#endif