Move shadow option (for text) from editor/interface to blenfont.

Two new function:
 BLF_shadow: set the level (for blur) and the shadow color.
 BLF_shadow_offset: set the x and y offset for shadow.
		 (this is the current position plus offset)

By default shadow is not enable in the font, so before draw the
text you need call BLF_enable(BLF_SHADOW), also remember disable
the option in the end.

4 files changed, 82 insertions, 0 deletions

diff --git a/source/blender/blenfont/BLF_api.h b/source/blender/blenfont/BLF_api.h
index e871de490f3..cb64615d64c 100644
--- a/source/blender/blenfont/BLF_api.h
+++ b/source/blender/blenfont/BLF_api.h
@@ -91,6 +91,21 @@ void BLF_enable(int option);
 void BLF_disable(int option);
 
 /*
+ * Shadow options, level is the blur level, can be 3, 5 or 0 and
+ * the other argument are the rgba color.
+ * Take care that shadow need to be enable using BLF_enable!!.
+ */
+void BLF_shadow(int level, float r, float g, float b, float a);
+
+/*
+ * Set the offset for shadow text, this is the current cursor
+ * position plus this offset, don't need call BLF_position before
+ * this function, the current position is calculate only on
+ * BLF_draw, so it's safe call this whenever you like.
+ */
+void BLF_shadow_offset(int x, int y);
+
+/*
  * Search the path directory to the locale files, this try all
  * the case for Linux, Win and Mac.
  */
@@ -119,6 +134,7 @@ void BLF_dir_free(char **dirs, int count);
 #define BLF_CLIPPING (1<<1)
 #define BLF_FONT_KERNING (1<<2)
 #define BLF_USER_KERNING (1<<3)
+#define BLF_SHADOW (1<<4)
 
 /* font->mode. */
 #define BLF_MODE_TEXTURE 0
diff --git a/source/blender/blenfont/intern/blf.c b/source/blender/blenfont/intern/blf.c
index f06c7fb0d28..9dad5a4bfa0 100644
--- a/source/blender/blenfont/intern/blf.c
+++ b/source/blender/blenfont/intern/blf.c
@@ -500,3 +500,28 @@ void BLF_kerning(float space)
 	if (font)
 		font->kerning= space;
 }
+
+void BLF_shadow(int level, float r, float g, float b, float a)
+{
+	FontBLF *font;
+
+	font= global_font[global_font_cur];
+	if (font) {
+		font->shadow= level;
+		font->shadow_col[0]= r;
+		font->shadow_col[1]= g;
+		font->shadow_col[2]= b;
+		font->shadow_col[3]= a;
+	}
+}
+
+void BLF_shadow_offset(int x, int y)
+{
+	FontBLF *font;
+
+	font= global_font[global_font_cur];
+	if (font) {
+		font->shadow_x= x;
+		font->shadow_y= y;
+	}
+}
diff --git a/source/blender/blenfont/intern/blf_glyph.c b/source/blender/blenfont/intern/blf_glyph.c
index 33a435cc5be..5e0868ea680 100644
--- a/source/blender/blenfont/intern/blf_glyph.c
+++ b/source/blender/blenfont/intern/blf_glyph.c
@@ -496,8 +496,18 @@ int blf_glyph_texture_render(FontBLF *font, GlyphBLF *g, float x, float y)
 	GLint cur_tex;
 	float dx, dx1;
 	float y1, y2;
+	float xo, yo;
+	float color[4];
 
 	gt= g->tex_data;
+
+	if (font->flags & BLF_SHADOW) {
+		xo= x;
+		yo= y;
+		x += font->shadow_x;
+		y += font->shadow_y;
+	}
+
 	dx= floor(x + gt->pos_x);
 	dx1= dx + gt->width;
 	y1= y + gt->pos_y;
@@ -518,6 +528,27 @@ int blf_glyph_texture_render(FontBLF *font, GlyphBLF *g, float x, float y)
 	if (cur_tex != gt->tex)
 		glBindTexture(GL_TEXTURE_2D, gt->tex);
 
+	if (font->flags & BLF_SHADOW) {
+		glGetFloatv(GL_CURRENT_COLOR, color);
+		glColor4fv(font->shadow_col);
+
+		if (font->shadow == 3)
+			blf_texture3_draw(gt->uv, dx, y1, dx1, y2);
+		else if (font->shadow == 5)
+			blf_texture5_draw(gt->uv, dx, y1, dx1, y2);
+		else
+			blf_texture_draw(gt->uv, dx, y1, dx1, y2);
+
+		glColor4fv(color);
+		x= xo;
+		y= yo;
+
+		dx= floor(x + gt->pos_x);
+		dx1= dx + gt->width;
+		y1= y + gt->pos_y;
+		y2= y + gt->pos_y - gt->height;
+	}
+
 	if (font->blur==3)
 		blf_texture3_draw(gt->uv, dx, y1, dx1, y2);
 	else if (font->blur==5)
diff --git a/source/blender/blenfont/intern/blf_internal_types.h b/source/blender/blenfont/intern/blf_internal_types.h
index 60446aa93b2..5382ac19aae 100644
--- a/source/blender/blenfont/intern/blf_internal_types.h
+++ b/source/blender/blenfont/intern/blf_internal_types.h
@@ -154,6 +154,16 @@ typedef struct FontBLF {
 	
 	/* blur: 3 or 5 large kernel */
 	int blur;
+
+	/* shadow level. */
+	int shadow;
+
+	/* and shadow offset. */
+	int shadow_x;
+	int shadow_y;
+
+	/* shadow color. */
+	float shadow_col[4];
 	
 	/* this is the matrix that we load before rotate/scale/translate. */
 	float mat[4][4];