108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/*
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* UPIWIN - Micro Pi Windowing Framework Kernel
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* Copyright (C) 2019 Amy Bowersox/Erbosoft Metaverse Design Solutions
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*-------------------------------------------------------------------------
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*/
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include "scode.h"
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#include "config.h"
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#include "log.h"
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#include "fontengine.h"
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static FT_Library library;
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static FT_Face stdfont;
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static void fonteng_cleanup(void)
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{
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FT_Done_Face(stdfont);
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FT_Done_FreeType(library);
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}
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HRESULT FontEng_setup(void)
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{
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HRESULT hr = S_OK;
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FT_Error err;
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err = FT_Init_FreeType(&library);
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if (err != 0)
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{
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Log(LFATAL, "Unable to initialize Freetype (%d)", err);
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return E_FAIL;
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}
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err = FT_New_Face(library, "/usr/local/share/fonts/truetype/arial.ttf", 0, &stdfont);
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if (err != 0)
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{
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Log(LFATAL, "Unable to load font (%d)", err);
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hr = E_FAIL;
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goto error_0;
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}
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err = FT_Set_Pixel_Sizes(stdfont, 0, 16);
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if (err != 0)
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{
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Log(LFATAL, "Unable to set font size (%d)", err);
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hr = E_FAIL;
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goto error_1;
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}
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hr = Config_exitfunc(fonteng_cleanup);
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if (FAILED(hr))
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fonteng_cleanup();
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return hr;
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error_1:
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FT_Done_Face(stdfont);
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error_0:
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FT_Done_FreeType(library);
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return hr;
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}
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HRESULT FontEng_do_text_out(INT32 x, INT32 y, PCSTR pstr, TEXTOUTFUNC renderfunc)
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{
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HRESULT hr = S_OK;
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FT_GlyphSlot slot = stdfont->glyph;
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FT_UInt glyph_index;
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FT_Error err;
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y += (stdfont->size->metrics.ascender >> 6);
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while (*pstr)
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{
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glyph_index = FT_Get_Char_Index(stdfont, *pstr);
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err = FT_Load_Glyph(stdfont, glyph_index, FT_LOAD_DEFAULT);
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if (err != 0)
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{
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hr = E_FAIL;
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break;
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}
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err = FT_Render_Glyph(stdfont->glyph, FT_RENDER_MODE_NORMAL);
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if (err != 0)
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{
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hr = E_FAIL;
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break;
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}
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(*renderfunc)(x + slot->bitmap_left, y - slot->bitmap_top, slot->bitmap.width,
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slot->bitmap.rows, slot->bitmap.buffer);
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x += slot->advance.x >> 6;
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y += slot->advance.y >> 6;
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pstr++;
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}
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return hr;
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}
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