FaSTTUBe/GST-Tensordecoder-ov_ep
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textrender: Fix blitting of text over the output buffer and cairo painting

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This commit is contained in:
Sebastian Dröge 2009-08-06 20:47:33 +02:00
parent cc61c9e27e
commit 6776cb445e
1 changed files with 9 additions and 8 deletions
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17
ext/pango/gsttextrender.c
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@ -267,14 +267,10 @@ gst_text_render_render_pangocairo (GstTextRender * render)
cr_shadow = cairo_create (surface_shadow); cr_shadow = cairo_create (surface_shadow);
/* clear shadow surface */ /* clear shadow surface */
cairo_set_source_rgba (cr_shadow, 0.0, 0.0, 0.0, 0.0);
cairo_set_operator (cr_shadow, CAIRO_OPERATOR_CLEAR); cairo_set_operator (cr_shadow, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr_shadow); cairo_paint (cr_shadow);
cairo_set_operator (cr_shadow, CAIRO_OPERATOR_OVER); cairo_set_operator (cr_shadow, CAIRO_OPERATOR_OVER);
cairo_set_source_rgb (cr_shadow, 0.0, 0.0, 0.0);
pango_cairo_update_layout (cr_shadow, render->layout);
/* draw shadow text */ /* draw shadow text */
cairo_save (cr_shadow); cairo_save (cr_shadow);
cairo_set_source_rgba (cr_shadow, 0.0, 0.0, 0.0, 0.5); cairo_set_source_rgba (cr_shadow, 0.0, 0.0, 0.0, 0.5);
@ -284,6 +280,7 @@ gst_text_render_render_pangocairo (GstTextRender * render)
/* draw outline text */ /* draw outline text */
cairo_save (cr_shadow); cairo_save (cr_shadow);
cairo_set_source_rgb (cr_shadow, 0.0, 0.0, 0.0);
cairo_set_line_width (cr_shadow, render->outline_offset); cairo_set_line_width (cr_shadow, render->outline_offset);
pango_cairo_layout_path (cr_shadow, render->layout); pango_cairo_layout_path (cr_shadow, render->layout);
cairo_stroke (cr_shadow); cairo_stroke (cr_shadow);
@ -292,18 +289,21 @@ gst_text_render_render_pangocairo (GstTextRender * render)
cairo_destroy (cr_shadow); cairo_destroy (cr_shadow);
render->text_image = g_realloc (render->text_image, 4 * width * height); render->text_image = g_realloc (render->text_image, 4 * width * height);
memset (render->text_image, 0, 4 * width * height);
surface = cairo_image_surface_create_for_data (render->text_image, surface = cairo_image_surface_create_for_data (render->text_image,
CAIRO_FORMAT_ARGB32, width, height, width * 4); CAIRO_FORMAT_ARGB32, width, height, width * 4);
cr = cairo_create (surface); cr = cairo_create (surface);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
/* set default color */ /* set default color */
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_save (cr);
/* draw text */ /* draw text */
pango_cairo_update_layout (cr, render->layout);
pango_cairo_show_layout (cr, render->layout); pango_cairo_show_layout (cr, render->layout);
cairo_restore (cr);
/* composite shadow with offset */ /* composite shadow with offset */
cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER); cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
@ -404,7 +404,7 @@ gst_text_renderer_image_to_ayuv (GstTextRender * render, guchar * pixbuf,
for (y = 0; y < height; y++) { for (y = 0; y < height; y++) {
int n; int n;
p = pixbuf + ypos * stride + xpos; p = pixbuf + (ypos + y) * stride + xpos * 4;
for (n = 0; n < width; n++) { for (n = 0; n < width; n++) {
b = bitp[CAIRO_ARGB_B]; b = bitp[CAIRO_ARGB_B];
g = bitp[CAIRO_ARGB_G]; g = bitp[CAIRO_ARGB_G];
@ -436,12 +436,13 @@ gst_text_renderer_image_to_argb (GstTextRender * render, guchar * pixbuf,
bitp = render->text_image; bitp = render->text_image;
for (i = 0; i < height; i++) { for (i = 0; i < height; i++) {
p = pixbuf + ypos * stride + xpos; p = pixbuf + (ypos + i) * stride + xpos * 4;
for (j = 0; j < width; j++) { for (j = 0; j < width; j++) {
p[0] = bitp[CAIRO_ARGB_A]; p[0] = bitp[CAIRO_ARGB_A];
p[1] = bitp[CAIRO_ARGB_R]; p[1] = bitp[CAIRO_ARGB_R];
p[2] = bitp[CAIRO_ARGB_G]; p[2] = bitp[CAIRO_ARGB_G];
p[3] = bitp[CAIRO_ARGB_B]; p[3] = bitp[CAIRO_ARGB_B];
bitp += 4; bitp += 4;
p += 4; p += 4;
} }