Author: Carlos Lopez <[email protected]>
Date: Mon Aug 27 20:10:55 2012 +0200
Layer_Freetype: initial version for Cairo render. It tries to imitate the
current software render. Not all the features implemented yet.
---
.../src/modules/lyr_freetype/lyr_freetype.cpp | 110 ++++++++++++++++++++
.../src/modules/lyr_freetype/lyr_freetype.h | 1 +
2 files changed, 111 insertions(+), 0 deletions(-)
diff --git a/synfig-core/src/modules/lyr_freetype/lyr_freetype.cpp
b/synfig-core/src/modules/lyr_freetype/lyr_freetype.cpp
index 06d0f92..42443e1 100644
--- a/synfig-core/src/modules/lyr_freetype/lyr_freetype.cpp
+++ b/synfig-core/src/modules/lyr_freetype/lyr_freetype.cpp
@@ -41,6 +41,8 @@
#include "lyr_freetype.h"
#endif
+#include <pango/pangocairo.h>
+
using namespace std;
using namespace etl;
using namespace synfig;
@@ -911,6 +913,114 @@ Layer_Freetype::accelerated_render(Context
context,Surface *surface,int quality,
return true;
}
+////
+bool
+Layer_Freetype::accelerated_cairorender(Context context,cairo_surface_t
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+ const Point tl(renddesc.get_tl());
+ const Point br(renddesc.get_br());
+
+ const int w(renddesc.get_w());
+ const int h(renddesc.get_h());
+
+ // Width and Height of a pixel
+ const Real pw = (br[0] - tl[0]) / w;
+ const Real ph = (br[1] - tl[1]) / h;
+
+ const double sx(1/pw);
+ const double sy(1/ph);
+ const double tx((-tl[0]+origin[0])*sx);
+ const double ty((-tl[1]+origin[1])*sy);
+
+ // Initially render what's behind us
+ if(!context.accelerated_cairorender(surface,quality,renddesc,cb))
+ {
+ if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Cairo
Renderer Failure",__LINE__));
+ return false;
+ }
+
+ // Cairo context
+ cairo_t* cr=cairo_create(surface);
+
+ // Pango
+ PangoLayout *layout;
+ PangoFontDescription *font_description;
+ // Pango Font
+ font_description = pango_font_description_new ();
+ pango_font_description_set_family (font_description, font.c_str());
+ pango_font_description_set_weight (font_description,
PangoWeight(weight));
+ pango_font_description_set_style (font_description, PangoStyle(style));
+ float sizex=1.75*size[0]*sx;
+ pango_font_description_set_absolute_size (font_description, sizex *
PANGO_SCALE );
+ //Pango Layout
+ layout = pango_cairo_create_layout (cr);
+ pango_layout_set_font_description (layout, font_description);
+ pango_layout_set_text (layout, text.c_str(), -1);
+ pango_layout_set_alignment(layout, PANGO_ALIGN_LEFT);
+ pango_layout_set_single_paragraph_mode(layout, false);
+ PangoRectangle ink_rect;
+ PangoRectangle logical_rect;
+ pango_layout_get_pixel_extents(layout, &ink_rect, &logical_rect);
+
+ // Render text
+ cairo_save(cr);
+ cairo_set_source_rgba(cr, color.get_r(), color.get_g(), color.get_b(),
color.get_a());
+ cairo_move_to(cr, tx, ty);
+ int total_lines=pango_layout_get_line_count(layout), i;
+ synfig::info("total lines %d", total_lines);
+ PangoLayoutIter* layoutiter(pango_layout_get_iter(layout));
+ int sup=0, inf, wdiff, baseline;
+ for(i=0;i<total_lines; i++)
+ {
+ synfig::info("i=%d", i);
+ pango_layout_iter_get_line_extents(layoutiter, &ink_rect,
&logical_rect);
+ pango_extents_to_pixels(&ink_rect, NULL);
+ pango_extents_to_pixels(&logical_rect, NULL);
+ sup=ink_rect.y-logical_rect.y;
+ wdiff=logical_rect.height-ink_rect.height;
+ inf=wdiff-sup;
+ synfig::info("sup=%d", sup);
+ synfig::info("inf=%d", inf);
+ baseline=pango_layout_iter_get_baseline(layoutiter);
+ synfig::info("baseline=%d", baseline);
+ cairo_move_to(cr, tx, ty+baseline/PANGO_SCALE);
+ cairo_rel_move_to(cr, 0, -ink_rect.y+logical_rect.y);
+ pango_cairo_show_layout_line(cr,
pango_layout_get_line_readonly(layout, i));
+ //cairo_rel_move_to(cr, 0, inf);
+ if(!pango_layout_iter_next_line(layoutiter))
+ break;
+ }
+// cairo_move_to (cr,
tx-ink_rect.x+logical_rect.x-ink_rect.width*orient[0],
ty-ink_rect.y+logical_rect.y-ink_rect.height*orient[1]);
+// pango_cairo_show_layout (cr, layout);
+ cairo_restore(cr);
+ if(1)
+ {
+ pango_layout_get_pixel_extents(layout, &ink_rect,
&logical_rect);
+ // Render logical and ink rectangles
+ cairo_save(cr);
+ cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
+ cairo_set_line_width(cr, 1.0);
+ cairo_rectangle(cr, tx+ink_rect.x-0.5, ty+ink_rect.y-0.5,
ink_rect.width, ink_rect.height);
+ cairo_stroke(cr);
+ cairo_restore(cr);
+
+ cairo_save(cr);
+ cairo_set_line_width(cr, 1.0);
+ cairo_set_source_rgb(cr, 0.0, 0.0, 1.0);
+ cairo_rectangle(cr, tx+logical_rect.x-0.5,
ty+logical_rect.y-0.5, logical_rect.width, logical_rect.height);
+ cairo_stroke(cr);
+ cairo_restore(cr);
+ }
+ // Destroy and return
+ pango_layout_iter_free(layoutiter);
+ cairo_destroy(cr);
+ g_object_unref (layout);
+ pango_font_description_free (font_description);
+ return true;
+}
+////
+
+
synfig::Rect
Layer_Freetype::get_bounding_rect()const
{
diff --git a/synfig-core/src/modules/lyr_freetype/lyr_freetype.h
b/synfig-core/src/modules/lyr_freetype/lyr_freetype.h
index 81261bc..9e001b4 100644
--- a/synfig-core/src/modules/lyr_freetype/lyr_freetype.h
+++ b/synfig-core/src/modules/lyr_freetype/lyr_freetype.h
@@ -146,6 +146,7 @@ public:
virtual ValueBase get_param(const String & param)const;
virtual Color get_color(Context context, const synfig::Point &pos)const;
virtual bool accelerated_render(Context context,Surface *surface,int
quality, const RendDesc &renddesc, ProgressCallback *cb)const;
+ virtual bool accelerated_cairorender(Context context,cairo_surface_t
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
virtual Vocab get_param_vocab()const;
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