+ vlc_bool_t b_even_scanline = i_y_offset % 2;
+
+ i_dst_pitch = p_dst->p[Y_PLANE].i_pitch;
+ p_dst_y = p_dst->p[Y_PLANE].p_pixels + i_x_offset +
+ p_filter->fmt_out.video.i_x_offset +
+ p_dst->p[Y_PLANE].i_pitch *
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
+ p_dst_u = p_dst->p[U_PLANE].p_pixels + i_x_offset/2 +
+ p_filter->fmt_out.video.i_x_offset/2 +
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
+ p_dst->p[U_PLANE].i_pitch;
+ p_dst_v = p_dst->p[V_PLANE].p_pixels + i_x_offset/2 +
+ p_filter->fmt_out.video.i_x_offset/2 +
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
+ p_dst->p[V_PLANE].i_pitch;
+
+ i_src1_pitch = p_dst_orig->p[Y_PLANE].i_pitch;
+ p_src1_y = p_dst_orig->p[Y_PLANE].p_pixels + i_x_offset +
+ p_filter->fmt_out.video.i_x_offset +
+ p_dst_orig->p[Y_PLANE].i_pitch *
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
+ p_src1_u = p_dst_orig->p[U_PLANE].p_pixels + i_x_offset/2 +
+ p_filter->fmt_out.video.i_x_offset/2 +
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
+ p_dst_orig->p[U_PLANE].i_pitch;
+ p_src1_v = p_dst_orig->p[V_PLANE].p_pixels + i_x_offset/2 +
+ p_filter->fmt_out.video.i_x_offset/2 +
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset ) / 2 *
+ p_dst_orig->p[V_PLANE].i_pitch;
+
+ i_src_pix_pitch = p_src->p->i_pixel_pitch;
+ i_src2_pitch = p_src->p->i_pitch;
+ p_src2 = p_src->p->p_pixels +
+ p_filter->fmt_in.video.i_x_offset * i_src2_pitch +
+ p_src->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
+
+
+#define MAX_TRANS 255
+#define TRANS_BITS 8
+
+ /* Draw until we reach the bottom of the subtitle */
+ for( i_y = 0; i_y < i_height; i_y++,
+ p_dst_y += i_dst_pitch, p_src1_y += i_src1_pitch,
+ p_dst_u += b_even_scanline ? i_dst_pitch/2 : 0,
+ p_src1_u += b_even_scanline ? i_src1_pitch/2 : 0,
+ p_dst_v += b_even_scanline ? i_dst_pitch/2 : 0,
+ p_src1_v += b_even_scanline ? i_src1_pitch/2 : 0,
+ p_src2 += i_src2_pitch )
+ {
+ b_even_scanline = !b_even_scanline;
+
+ /* Draw until we reach the end of the line */
+ for( i_x = 0; i_x < i_width; i_x++ )
+ {
+#define R ( p_src2[i_x * i_src_pix_pitch + 0] )
+#define G ( p_src2[i_x * i_src_pix_pitch + 1] )
+#define B ( p_src2[i_x * i_src_pix_pitch + 2] )
+ i_trans = ( p_src2[i_x * i_src_pix_pitch + 3] * i_alpha ) / 255;
+ if( !i_trans )
+ {
+ /* Completely transparent. Don't change pixel */
+ continue;
+ }
+ else if( i_trans == MAX_TRANS )
+ {
+ /* Completely opaque. Completely overwrite underlying pixel */
+ rgb_to_yuv( &y, &u, &v, R, G, B );
+ p_dst_y[i_x] = y;
+
+ if( b_even_scanline && i_x % 2 == 0 )
+ {
+ p_dst_u[i_x/2] = u;
+ p_dst_v[i_x/2] = v;
+ }
+ continue;
+ }
+
+ /* Blending */
+ rgb_to_yuv( &y, &u, &v, R, G, B );
+ p_dst_y[i_x] = ( (uint16_t)y * i_trans +
+ (uint16_t)p_src1_y[i_x] * (MAX_TRANS - i_trans) )
+ >> TRANS_BITS;
+
+ if( b_even_scanline && i_x % 2 == 0 )
+ {
+ p_dst_u[i_x/2] = ( (uint16_t)u * i_trans +
+ (uint16_t)p_src1_u[i_x/2] * (MAX_TRANS - i_trans) )
+ >> TRANS_BITS;
+ p_dst_v[i_x/2] = ( (uint16_t)v * i_trans +
+ (uint16_t)p_src1_v[i_x/2] * (MAX_TRANS - i_trans) )
+ >> TRANS_BITS;
+ }
+#undef R
+#undef G
+#undef B
+ }
+ }
+
+#undef MAX_TRANS
+#undef TRANS_BITS
+
+ return;
+}
+
+static void BlendRGBAR24( filter_t *p_filter, picture_t *p_dst_pic,
+ picture_t *p_dst_orig, picture_t *p_src,
+ int i_x_offset, int i_y_offset,
+ int i_width, int i_height, int i_alpha )
+{
+ int i_src1_pitch, i_src2_pitch, i_dst_pitch;
+ uint8_t *p_dst, *p_src1, *p_src2;
+ int i_x, i_y, i_pix_pitch, i_trans, i_src_pix_pitch;
+
+ i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
+ i_dst_pitch = p_dst_pic->p->i_pitch;
+ p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
+ p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
+ p_dst_pic->p->i_pitch *
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
+
+ i_src1_pitch = p_dst_orig->p->i_pitch;
+ p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
+ p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
+ p_dst_orig->p->i_pitch *
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
+
+ i_src_pix_pitch = p_src->p->i_pixel_pitch;
+ i_src2_pitch = p_src->p->i_pitch;
+ p_src2 = p_src->p->p_pixels +
+ p_filter->fmt_in.video.i_x_offset * i_pix_pitch +
+ p_src->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
+
+#define MAX_TRANS 255
+#define TRANS_BITS 8
+
+ /* Draw until we reach the bottom of the subtitle */
+ for( i_y = 0; i_y < i_height; i_y++,
+ p_dst += i_dst_pitch, p_src1 += i_src1_pitch, p_src2 += i_src2_pitch )
+ {
+ /* Draw until we reach the end of the line */
+ for( i_x = 0; i_x < i_width; i_x++ )
+ {
+#define R ( p_src2[i_x * i_src_pix_pitch + 0] )
+#define G ( p_src2[i_x * i_src_pix_pitch + 1] )
+#define B ( p_src2[i_x * i_src_pix_pitch + 2] )
+ i_trans = ( p_src2[i_x * i_src_pix_pitch + 3] * i_alpha ) / 255;
+ if( !i_trans )
+ {
+ /* Completely transparent. Don't change pixel */
+ continue;
+ }
+ else if( i_trans == MAX_TRANS )
+ {
+ /* Completely opaque. Completely overwrite underlying pixel */
+ p_dst[i_x * i_pix_pitch + 0] = R;
+ p_dst[i_x * i_pix_pitch + 1] = G;
+ p_dst[i_x * i_pix_pitch + 2] = B;
+ continue;
+ }
+
+ /* Blending */
+ p_dst[i_x * i_pix_pitch + 0] = ( R * i_trans +
+ (uint16_t)p_src1[i_x * i_pix_pitch + 0] *
+ (MAX_TRANS - i_trans) ) >> TRANS_BITS;
+ p_dst[i_x * i_pix_pitch + 1] = ( G * i_trans +
+ (uint16_t)p_src1[i_x * i_pix_pitch + 1] *
+ (MAX_TRANS - i_trans) ) >> TRANS_BITS;
+ p_dst[i_x * i_pix_pitch + 2] = ( B * i_trans +
+ (uint16_t)p_src1[i_x * i_pix_pitch + 2] *
+ (MAX_TRANS - i_trans) ) >> TRANS_BITS;
+#undef R
+#undef G
+#undef B
+ }
+ }
+
+#undef MAX_TRANS
+#undef TRANS_BITS
+
+ return;