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  • Committer: Frantisek Princ
  • Date: 2012-08-24 14:07:52 UTC
  • mfrom: (1235.1.401 HelenOS.mainline)
  • Revision ID: frantisek.princ@gmail.com-20120824140752-pihztxo52535kxo1
Merge with mainline

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uspace/lib/draw/font.c
 
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/*
 
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 * Copyright (c) 2012 Petr Koupy
 
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 * All rights reserved.
 
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 *
 
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 * Redistribution and use in source and binary forms, with or without
 
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 * modification, are permitted provided that the following conditions
 
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 * are met:
 
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 *
 
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 * - Redistributions of source code must retain the above copyright
 
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 *   notice, this list of conditions and the following disclaimer.
 
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 * - Redistributions in binary form must reproduce the above copyright
 
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 *   notice, this list of conditions and the following disclaimer in the
 
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 *   documentation and/or other materials provided with the distribution.
 
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 * - The name of the author may not be used to endorse or promote products
 
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 *   derived from this software without specific prior written permission.
 
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 *
 
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
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 */
 
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/** @addtogroup draw
 
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 * @{
 
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 */
 
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/**
 
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 * @file
 
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 */
 
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#include <assert.h>
 
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#include <malloc.h>
 
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#include "font.h"
 
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#include "font/embedded.h"
 
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#include "drawctx.h"
 
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void font_init(font_t *font, font_decoder_type_t decoder, char *path, uint16_t points)
 
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{
 
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        font->points = points;
 
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        switch (decoder) {
 
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        case FONT_DECODER_EMBEDDED:
 
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                font->decoder = &fd_embedded;
 
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                break;
 
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        default:
 
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                font->decoder = NULL;
 
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                break;
 
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        }
 
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        if (font->decoder) {
 
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                font->decoder->init(path, &font->glyph_count, &font->decoder_data);
 
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                if (font->glyph_count > 0) {
 
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                        font->glyphs = (surface_t **) malloc(sizeof(surface_t *) * font->glyph_count);
 
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                } else {
 
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                        font->glyphs = NULL;
 
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                }
 
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                if (font->glyphs) {
 
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                        for (size_t i = 0; i < font->glyph_count; ++i) {
 
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                                font->glyphs[i] = NULL;
 
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                        }
 
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                } else {
 
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                        font->glyph_count = 0;
 
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                }
 
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        } else {
 
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                font->glyph_count = 0;
 
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                font->glyphs = NULL;
 
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                font->decoder_data = NULL;
 
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        }
 
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}
 
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void font_release(font_t *font)
 
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{
 
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        if (font->glyphs) {
 
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                for (size_t i = 0; i < font->glyph_count; ++i) {
 
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                        if (font->glyphs[i]) {
 
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                                surface_destroy(font->glyphs[i]);
 
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                        }
 
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                }
 
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                free(font->glyphs);
 
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        }
 
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        if (font->decoder) {
 
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                font->decoder->release(font->decoder_data);
 
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        }
 
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}
 
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void font_get_box(font_t *font, char *text, sysarg_t *width, sysarg_t *height)
 
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{
 
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        assert(width);
 
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        assert(height);
 
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        (*width) = 0;
 
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        (*height) = 0;
 
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        if (!text) {
 
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                return;
 
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        }
 
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        while (*text) {
 
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                uint16_t glyph_idx = font->decoder->resolve(*text, font->decoder_data);
 
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                if (glyph_idx < font->glyph_count) {
 
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                        if (!font->glyphs[glyph_idx]) {
 
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                                font->glyphs[glyph_idx] =
 
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                                    font->decoder->render(glyph_idx, font->points);
 
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                        }
 
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                        surface_t *glyph = font->glyphs[glyph_idx];
 
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                        if (glyph) {
 
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                                sysarg_t w;
 
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                                sysarg_t h;
 
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                                surface_get_resolution(glyph, &w, &h);
 
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                                (*width) += w;
 
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                                (*height) = (*height) < h ? h : (*height);
 
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                        }
 
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                }
 
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                ++text;
 
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        }
 
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}
 
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void font_draw_text(font_t *font, drawctx_t *context, source_t *source,
 
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    const char *text, sysarg_t x, sysarg_t y)
 
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{
 
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        assert(context);
 
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        assert(source);
 
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        drawctx_save(context);
 
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        drawctx_set_compose(context, compose_over);
 
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        while (*text) {
 
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                uint16_t glyph_idx = font->decoder->resolve(*text, font->decoder_data);
 
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                if (glyph_idx < font->glyph_count) {
 
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                        if (!font->glyphs[glyph_idx]) {
 
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                                font->glyphs[glyph_idx] =
 
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                                    font->decoder->render(glyph_idx, font->points);
 
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                        }
 
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                        surface_t *glyph = font->glyphs[glyph_idx];
 
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                        if (glyph) {
 
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                                sysarg_t w;
 
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                                sysarg_t h;
 
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                                surface_get_resolution(glyph, &w, &h);
 
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                                transform_t transform;
 
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                                transform_identity(&transform);
 
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                                transform_translate(&transform, x, y);
 
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                                source_set_transform(source, transform);
 
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                                source_set_mask(source, glyph, false);
 
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                                drawctx_transfer(context, x, y, w, h);
 
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                                x += w;
 
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                        }
 
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                }
 
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                ++text;
 
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        }
 
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        drawctx_restore(context);
 
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        source_set_mask(source, NULL, false);
 
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}
 
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/** @}
 
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 */