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textoverlay: Fix drawing of UYVY text borders

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This commit is contained in:
Sebastian Dröge 2009-03-26 11:02:41 +01:00
parent e54e10ad19
commit f1bc9e97aa
1 changed files with 24 additions and 8 deletions
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32
ext/pango/gsttextoverlay.c
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@ -1017,7 +1017,6 @@ gst_text_overlay_blit_UYVY (GstTextOverlay * overlay, FT_Bitmap * bitmap,
{ {
int y; /* text bitmap coordinates */ int y; /* text bitmap coordinates */
int x1, y1; /* video buffer coordinates */ int x1, y1; /* video buffer coordinates */
int bit_rowinc;
guint8 *p, *bitp; guint8 *p, *bitp;
int video_width, video_height; int video_width, video_height;
int bitmap_x0 = 0; //x0 < 1 ? -(x0 - 1) : 1; /* 1 pixel border */ int bitmap_x0 = 0; //x0 < 1 ? -(x0 - 1) : 1; /* 1 pixel border */
@ -1040,27 +1039,44 @@ gst_text_overlay_blit_UYVY (GstTextOverlay * overlay, FT_Bitmap * bitmap,
if (y0 + bitmap_y0 + bitmap_height > video_height - 1) /* 1 pixel border */ if (y0 + bitmap_y0 + bitmap_height > video_height - 1) /* 1 pixel border */
bitmap_height -= y0 + bitmap_y0 + bitmap_height - video_height + 1; bitmap_height -= y0 + bitmap_y0 + bitmap_height - video_height + 1;
bit_rowinc = bitmap->pitch - bitmap_width;
y1 = y0 + bitmap_y0;
x1 = x0 + bitmap_x0; x1 = x0 + bitmap_x0;
bitp = bitmap->buffer + bitmap->pitch * bitmap_y0 + bitmap_x0; y1 = y0 + bitmap_y0;
/* draw an outline around the text */
for (y = bitmap_y0; y < bitmap_y0 + bitmap_height; y++) { for (y = bitmap_y0; y < bitmap_y0 + bitmap_height; y++) {
int n; int n;
/* Go to the Y0 of the first macroblock we wan't to write to */ bitp = bitmap->buffer + (y * bitmap->pitch) + bitmap_x0;
p = yuv_pixels + (y0 + y) * video_width + (x1 * 2) + 1; p = yuv_pixels + (y0 + y) * video_width + (x1 * 2) + 1;
for (n = bitmap_width; n > 0; --n) {
if (*bitp) {
*(p + 2) = CLAMP (*(p + 2) - *bitp, 0, 255);
*(p - 2) = CLAMP (*(p - 2) - *bitp, 0, 255);
*(p - video_width) = CLAMP (*(p - video_width) - *bitp, 0, 255);
*(p + video_width) = CLAMP (*(p + video_width) - *bitp, 0, 255);
}
p += 2;
bitp++;
}
}
/* now blit text */
for (y = bitmap_y0; y < bitmap_y0 + bitmap_height; y++) {
int n;
bitp = bitmap->buffer + (y * bitmap->pitch) + bitmap_x0;
p = yuv_pixels + (y0 + y) * video_width + (x1 * 2) + 1;
for (n = bitmap_width; n > 0; --n) { for (n = bitmap_width; n > 0; --n) {
if (*bitp) { if (*bitp) {
*p = *bitp; *p = *bitp;
*(p - 1) = 0x80; *(p - 1) = 0x80;
} }
p += 2; p += 2;
bitp++; bitp++;
} }
bitp += bit_rowinc;
} }
} }
static void static void