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Initial implementation of GetGlyphsExtentPointEx and DrawGlyphStringEx

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Vincent Wei
2019-02-19 18:38:57 +08:00
parent d223edf0ba
commit 50e95cb461
1 changed files with 68 additions and 9 deletions
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src/newgdi/glyph-css.c
+68 -9
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@@ -2442,14 +2442,23 @@ static void justify_glyphs_auto(Uint32 rf, GLYPHEXTINFO* gei, int n,
}
static void adjust_glyph_position(LOGFONT* lfur, LOGFONT* lfsw, Uint32 rf,
int x, int y, GLYPHPOS* pos)
int x, int y, int lw, const GLYPHEXTINFO* gei, GLYPHPOS* pos)
{
switch (rf & GRF_WRITING_MODE_MASK) {
case GRF_WRITING_MODE_VERTICAL_RL:
if (IS_SIDEWAYS(rf)) {
x -= lfsw->size;
}
else {
x -= (lw + gei->bbox_w) / 2;
}
break;
case GRF_WRITING_MODE_VERTICAL_LR:
if (IS_SIDEWAYS(rf)) {
}
else {
x += (lw - gei->bbox_w) / 2;
}
break;
@@ -2457,11 +2466,35 @@ static void adjust_glyph_position(LOGFONT* lfur, LOGFONT* lfsw, Uint32 rf,
default:
break;
}
pos->x += x;
pos->y += y;
}
static void fill_glyph_positions(LOGFONT* lfur, LOGFONT* lfsw, Uint32 rf,
static void offset_glyph_positions(Uint32 rf, GLYPHPOS* pos, int n, int offset)
{
int i;
switch (rf & GRF_WRITING_MODE_MASK) {
case GRF_WRITING_MODE_VERTICAL_RL:
case GRF_WRITING_MODE_VERTICAL_LR:
for (i = 0; i < n; i++) {
pos[i].y += offset;
}
break;
case GRF_WRITING_MODE_HORIZONTAL_TB:
default:
for (i = 0; i < n; i++) {
pos[i].x += offset;
}
break;
}
}
static void calc_glyph_positions(LOGFONT* lfur, LOGFONT* lfsw, Uint32 rf,
const GLYPHEXTINFO* gei, int n,
int x, int y, int max_extent, GLYPHPOS* pos)
int x, int y, int lw, int gap, GLYPHPOS* pos)
{
int i;
@@ -2477,18 +2510,21 @@ static void fill_glyph_positions(LOGFONT* lfur, LOGFONT* lfsw, Uint32 rf,
pos[i].y += gei[i - 1].extra_y;
}
adjust_glyph_position(lfur, lfsw, rf, x, y, pos + i);
adjust_glyph_position(lfur, lfsw, rf, x, y, lw, gei + i, pos + i);
if (gei[i].advance_x == 0 && gei[i].advance_x == 0) {
pos[i].suppressed = 1;
}
}
if (max_extent > 0) {
if (gap > 0) {
switch (rf & GRF_ALIGN_MASK) {
case GRF_ALIGN_RIGHT:
case GRF_ALIGN_END:
offset_glyph_positions(rf, pos, n, -gap);
break;
case GRF_ALIGN_CENTER:
offset_glyph_positions(rf, pos, n, -gap/2);
break;
case GRF_ALIGN_LEFT:
@@ -2701,9 +2737,9 @@ int GUIAPI GetGlyphsExtentPointEx(LOGFONT* logfont_upright,
}
}
// fill glyph positions
fill_glyph_positions(logfont_upright, *logfont_sideways, render_flags,
my_gei, n, x, y, max_extent, glyph_pos);
// calcualte glyph positions according to the alignment and the base point
calc_glyph_positions(logfont_upright, *logfont_sideways, render_flags,
my_gei, n, x, y, line_width, max_extent - total_extent, glyph_pos);
if (line_size) {
if ((render_flags & GRF_WRITING_MODE_MASK)
@@ -2732,18 +2768,41 @@ int GUIAPI DrawGlyphStringEx(HDC hdc,
{
int i;
int n = 0;
Uint32 old_ta;
PLOGFONT old_lf;
if (glyph_pos == NULL)
if (glyph_pos == NULL || nr_glyphs <= 0)
return 0;
old_ta = SetTextAlign(hdc, TA_LEFT | TA_TOP | TA_UPDATECP);
old_lf = GetCurFont(hdc);
for (i = 0; i < nr_glyphs; i++) {
if (glyph_pos[i].suppressed == 0) {
if (glyph_pos[i].ort == GLYPH_ORIENTATION_UPRIGHT) {
if (logfont_upright)
SelectFont(hdc, logfont_upright);
else
goto error;
}
else {
if (logfont_sideways)
SelectFont(hdc, logfont_sideways);
else
goto error;
}
DrawGlyph(hdc, glyph_pos[i].x, glyph_pos[i].y, glyphs[i],
NULL, NULL);
n++;
}
}
error:
SelectFont(hdc, old_lf);
SetTextAlign(hdc, old_ta);
return n;
}