mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-25 01:30:38 +00:00
Code Issues 1 Projects Releases Wiki Activity

pango: Fix endianness issues from the pangocairo switch

Browse source 
cairo's ARGB is in native endianness, i.e. ARGB on big endian architectures
and BGRA on little endian architectures.
This commit is contained in:
Sebastian Dröge 2009-08-04 12:22:14 +02:00
parent 18a5264c87
commit 67954aeba3
1 changed files with 50 additions and 34 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

84
ext/pango/gsttextoverlay.c
View file

@ -140,6 +140,18 @@ GST_DEBUG_CATEGORY (pango_debug);
ret = (v0 * alpha + v1 * (255 - alpha)) / 255; \
}
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
# define CAIRO_ARGB_A 3
# define CAIRO_ARGB_R 2
# define CAIRO_ARGB_G 1
# define CAIRO_ARGB_B 0
#else
# define CAIRO_ARGB_A 0
# define CAIRO_ARGB_R 1
# define CAIRO_ARGB_G 2
# define CAIRO_ARGB_B 3
#endif
enum
{
PROP_0,
@ -1012,10 +1024,11 @@ gst_text_overlay_blit_1 (GstTextOverlay * overlay, guchar * dest, gint xpos,
pimage = text_image + 4 * (i * overlay->image_width);
py = dest + i * dest_stride + xpos;
for (j = 0; j < width; j++) {
b = *pimage++;
g = *pimage++;
r = *pimage++;
a = *pimage++;
b = pimage[CAIRO_ARGB_B];
g = pimage[CAIRO_ARGB_G];
r = pimage[CAIRO_ARGB_R];
a = pimage[CAIRO_ARGB_A];
pimage += 4;
if (a == 0) {
py++;
continue;
@ -1061,26 +1074,30 @@ gst_text_overlay_blit_sub2x2cbcr (GstTextOverlay * overlay,
pcb = destcb + (i / 2) * destcb_stride + xpos / 2;
pcr = destcr + (i / 2) * destcr_stride + xpos / 2;
for (j = 0; j < width; j += 2) {
b = *pimage1++;
g = *pimage1++;
r = *pimage1++;
a = *pimage1++;
b = pimage1[CAIRO_ARGB_B];
g = pimage1[CAIRO_ARGB_G];
r = pimage1[CAIRO_ARGB_R];
a = pimage1[CAIRO_ARGB_A];
pimage1 += 4;
b += *pimage1++;
g += *pimage1++;
r += *pimage1++;
a += *pimage1++;
b += pimage1[CAIRO_ARGB_B];
g += pimage1[CAIRO_ARGB_G];
r += pimage1[CAIRO_ARGB_R];
a += pimage1[CAIRO_ARGB_A];
pimage1 += 4;
b += *pimage2++;
g += *pimage2++;
r += *pimage2++;
a += *pimage2++;
b += pimage2[CAIRO_ARGB_B];
g += pimage2[CAIRO_ARGB_G];
r += pimage2[CAIRO_ARGB_R];
a += pimage2[CAIRO_ARGB_A];
pimage2 += 4;
/* for rounding */
b += *pimage2++ + 2;
g += *pimage2++ + 2;
r += *pimage2++ + 2;
a += *pimage2++ + 2;
/* + 2 for rounding */
b += pimage2[CAIRO_ARGB_B] + 2;
g += pimage2[CAIRO_ARGB_G] + 2;
r += pimage2[CAIRO_ARGB_R] + 2;
a += pimage2[CAIRO_ARGB_A] + 2;
pimage2 += 4;
b /= 4;
g /= 4;
@ -1093,9 +1110,9 @@ gst_text_overlay_blit_sub2x2cbcr (GstTextOverlay * overlay,
continue;
}
COMP_U (cb, r, g, b);
COMP_V (cr, r, g, b)
COMP_V (cr, r, g, b);
x = *pcb;
x = *pcb;
BLEND (*pcb++, a, cb, x);
x = *pcr;
BLEND (*pcr++, a, cr, x);
@ -1248,8 +1265,6 @@ gst_text_overlay_render_pangocairo (GstTextOverlay * overlay,
overlay->baseline_y = ink_rect.y;
}
#define BOX_XPAD 6
#define BOX_YPAD 6
@ -1366,15 +1381,17 @@ gst_text_overlay_blit_UYVY (GstTextOverlay * overlay,
pimage = overlay->text_image + i * overlay->image_width * 4;
dest = yuv_pixels + (i + ypos) * overlay->width * 2 + xpos * 2;
for (j = 0; j < w; j += 2) {
b0 = *pimage++;
g0 = *pimage++;
r0 = *pimage++;
a0 = *pimage++;
b0 = pimage[CAIRO_ARGB_B];
g0 = pimage[CAIRO_ARGB_G];
r0 = pimage[CAIRO_ARGB_R];
a0 = pimage[CAIRO_ARGB_A];
pimage += 4;
b1 = *pimage++;
g1 = *pimage++;
r1 = *pimage++;
a1 = *pimage++;
b1 = pimage[CAIRO_ARGB_B];
g1 = pimage[CAIRO_ARGB_G];
r1 = pimage[CAIRO_ARGB_R];
a1 = pimage[CAIRO_ARGB_A];
pimage += 4;
a0 += a1 + 2;
a0 /= 2;
@ -1454,7 +1471,6 @@ gst_text_overlay_push_frame (GstTextOverlay * overlay, GstBuffer * video_frame)
width = overlay->image_width;
height = overlay->image_height;
if (overlay->use_vertical_render)
halign = GST_TEXT_OVERLAY_HALIGN_RIGHT;
else