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Code Issues Releases Wiki Activity

Move base point calculation to a separate function. Will be reused soon.

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20300 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
eugeni 2006-10-18 18:33:19 +00:00
parent 67232605ef
commit 5b5798f039
1 changed files with 41 additions and 26 deletions
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67
libass/ass_render.c
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@ -1555,6 +1555,42 @@ static int get_face_descender(FT_Face face)
return v2;
}
/**
* \brief Calculate base point for positioning and rotation
* \param bbox text bbox
* \param alignment alignment
* \param bx, by out: base point coordinates
*/
static void get_base_point(FT_BBox bbox, int alignment, int* bx, int* by)
{
const int halign = alignment & 3;
const int valign = alignment & 12;
if (bx)
switch(halign) {
case HALIGN_LEFT:
*bx = bbox.xMin;
break;
case HALIGN_CENTER:
*bx = (bbox.xMax + bbox.xMin) / 2;
break;
case HALIGN_RIGHT:
*bx = bbox.xMax;
break;
}
if (by)
switch(valign) {
case VALIGN_TOP:
*by = bbox.yMin;
break;
case VALIGN_CENTER:
*by = (bbox.yMax + bbox.yMin) / 2;
break;
case VALIGN_SUB:
*by = bbox.yMax;
break;
}
}
/**
* \brief Main ass rendering function, glues everything together
* \param event event to render
@ -1788,33 +1824,12 @@ static int ass_render_event(ass_event_t* event, event_images_t* event_images)
// positioned events are totally different
if (render_context.evt_type == EVENT_POSITIONED) {
int align_shift_x = 0;
int align_shift_y = 0;
int base_x = 0;
int base_y = 0;
mp_msg(MSGT_GLOBAL, MSGL_DBG2, "positioned event at %d, %d\n", render_context.pos_x, render_context.pos_y);
switch(halign) {
case HALIGN_LEFT:
align_shift_x = - bbox.xMin;
break;
case HALIGN_CENTER:
align_shift_x = - (bbox.xMax + bbox.xMin) /2;
break;
case HALIGN_RIGHT:
align_shift_x = - bbox.xMax;
break;
}
switch(valign) {
case VALIGN_TOP:
align_shift_y = - bbox.yMin;
break;
case VALIGN_CENTER:
align_shift_y = - (bbox.yMax + bbox.yMin) /2;
break;
case VALIGN_SUB:
align_shift_y = - bbox.yMax;
break;
}
device_x = x2scr(render_context.pos_x) + align_shift_x;
device_y = y2scr(render_context.pos_y) + align_shift_y;
get_base_point(bbox, alignment, &base_x, &base_y);
device_x = x2scr(render_context.pos_x) - base_x;
device_y = y2scr(render_context.pos_y) - base_y;
}
// fix clip coordinates (they depend on alignment)