added license GPL

[winnie] / src / text.cc

diff --git a/src/text.cc b/src/text.cc
index ca0bf0b..7f8c067 100644 (file)
--- a/src/text.cc
+++ b/src/text.cc
@@ -1,7 +1,29 @@
+/*
+winnie - an experimental window system
+
+Copyright (C) 2013 Eleni Maria Stea
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Author: Eleni Maria Stea <elene.mst@gmail.com>
+*/
+
 #include <ft2build.h>
 #include <freetype/freetype.h>
 
 #include "gfx.h"
+#include "shalloc.h"
 #include "text.h"
 
 #define DPI 72
@@ -10,32 +32,46 @@
 
 static int draw_glyph(Pixmap *pixmap, int x, int y, char c);
 
-static FT_Library ft_lib;
-static FT_Face ft_face;
+struct Text {
+       FT_Library ft_lib;
+       FT_Face ft_face;
+       int text_x, text_y;
+       int text_color[3];
+};
 
-static int text_x, text_y;
-static int text_color[3] = {255, 255, 255};
+static Text *text;
 
 bool init_text()
 {
-       if(FT_Init_FreeType(&ft_lib)) {
+       if(!(text = (Text*)sh_malloc(sizeof *text))) {
+               return false;
+       }
+
+       if(FT_Init_FreeType(&text->ft_lib)) {
                fprintf(stderr, "Failed to initialize the FreeType library!\n");
                return false;
        }
 
-       if(FT_New_Face(ft_lib, FONT_PATH, 0, &ft_face)) {
+       if(FT_New_Face(text->ft_lib, FONT_PATH, 0, &text->ft_face)) {
                fprintf(stderr, "Failed to load font: %s\n", FONT_PATH);
                return false;
        }
 
-       if(FT_Set_Char_Size(ft_face, 0, FONT_SIZE * 64, DPI, DPI)) {
+       if(FT_Set_Char_Size(text->ft_face, 0, FONT_SIZE * 64, DPI, DPI)) {
                fprintf(stderr, "Failed to set font size\n");
                return false;
        }
 
+       set_text_color(255, 255, 255);
+
        return true;
 }
 
+void destroy_text()
+{
+       sh_free(text);
+}
+
 void draw_text(const char *txt, Pixmap *pixmap)
 {
        if(!pixmap) {
@@ -43,35 +79,35 @@ void draw_text(const char *txt, Pixmap *pixmap)
        }
 
        while(*txt != 0) {
-               text_x += draw_glyph(pixmap, text_x, text_y, *txt);
+               text->text_x += draw_glyph(pixmap, text->text_x, text->text_y, *txt);
                txt++;
        }
 }
 
 void set_text_position(int x, int y)
 {
-       text_x = x;
-       text_y = y;
+       text->text_x = x;
+       text->text_y = y;
 
 }
 
 void set_text_color(int r, int g, int b)
 {
-       text_color[0] = r;
-       text_color[1] = g;
-       text_color[2] = b;
+       text->text_color[0] = r;
+       text->text_color[1] = g;
+       text->text_color[2] = b;
 }
 
 static int draw_glyph(Pixmap *pixmap, int x, int y, char c)
 {
-       if(FT_Load_Char(ft_face, c, FT_LOAD_RENDER)) {
+       if(FT_Load_Char(text->ft_face, c, FT_LOAD_RENDER)) {
                return 0;
        }
 
-       x += ft_face->glyph->bitmap_left;
-       y -= ft_face->glyph->bitmap_top;
+       x += text->ft_face->glyph->bitmap_left;
+       y -= text->ft_face->glyph->bitmap_top;
 
-       FT_Bitmap *ft_bmp = &ft_face->glyph->bitmap;
+       FT_Bitmap *ft_bmp = &text->ft_face->glyph->bitmap;
        unsigned char *bmp_ptr = ft_bmp->buffer;
        unsigned char *pxm_ptr = pixmap->get_image() + (pixmap->get_width() * y + x) * 4;
 
@@ -93,9 +129,9 @@ static int draw_glyph(Pixmap *pixmap, int x, int y, char c)
 
                                if(bmp_ptr[j] && dest_x >= clipping_rect.x) {
                                        int a = (int)bmp_ptr[j];
-                                       pxm_ptr[4 * j] = (a * text_color[0] + pxm_ptr[4 * j] * (255 - a)) / 255;
-                                       pxm_ptr[4 * j + 1] = (a * text_color[1] + pxm_ptr[4 * j + 1] * (255 - a)) / 255;
-                                       pxm_ptr[4 * j + 2] = (a * text_color[2] + pxm_ptr[4 * j + 2] * (255 - a)) / 255;
+                                       pxm_ptr[4 * j] = (a * text->text_color[0] + pxm_ptr[4 * j] * (255 - a)) / 255;
+                                       pxm_ptr[4 * j + 1] = (a * text->text_color[1] + pxm_ptr[4 * j + 1] * (255 - a)) / 255;
+                                       pxm_ptr[4 * j + 2] = (a * text->text_color[2] + pxm_ptr[4 * j + 2] * (255 - a)) / 255;
                                }
                        }
                }
@@ -104,5 +140,5 @@ static int draw_glyph(Pixmap *pixmap, int x, int y, char c)
                bmp_ptr += ft_bmp->pitch;
        }
 
-       return ft_face->glyph->advance.x >> 6;
+       return text->ft_face->glyph->advance.x >> 6;
 }