mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-13 13:28:49 +00:00
134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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 with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "fonts.h"
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#include "bitmap.h"
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include "../../msvc/msvc_compat.h"
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#include "../../boolean.h"
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#define ATLAS_COLS 16
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#define ATLAS_ROWS 16
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#define ATLAS_SIZE (ATLAS_COLS * ATLAS_ROWS)
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typedef struct bm_renderer
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{
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unsigned scale_factor;
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struct font_glyph glyphs[ATLAS_SIZE];
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struct font_atlas atlas;
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} bm_renderer_t;
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static const struct font_atlas *font_renderer_get_atlas(void *data)
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{
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bm_renderer_t *handle = (bm_renderer_t*)data;
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return &handle->atlas;
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}
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static const struct font_glyph *font_renderer_get_glyph(
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void *data, uint32_t code)
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{
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bm_renderer_t *handle = (bm_renderer_t*)data;
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return code < ATLAS_SIZE ? &handle->glyphs[code] : NULL;
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}
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static void char_to_texture(bm_renderer_t *handle, uint8_t letter,
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unsigned atlas_x, unsigned atlas_y)
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{
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unsigned y, x, xo, yo;
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uint8_t *target = handle->atlas.buffer + atlas_x +
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atlas_y * handle->atlas.width;
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for (y = 0; y < FONT_HEIGHT; y++)
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{
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for (x = 0; x < FONT_WIDTH; x++)
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{
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unsigned font_pixel = x + y * FONT_WIDTH;
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uint8_t rem = 1 << (font_pixel & 7);
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unsigned offset = font_pixel >> 3;
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uint8_t col = (bitmap_bin[FONT_OFFSET(letter) + offset] & rem) ? 0xff : 0;
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uint8_t *dst = target;
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dst += x * handle->scale_factor;
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dst += y * handle->scale_factor * handle->atlas.width;
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for (yo = 0; yo < handle->scale_factor; yo++)
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for (xo = 0; xo < handle->scale_factor; xo++)
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dst[xo + yo * handle->atlas.width] = col;
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}
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}
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}
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static void *font_renderer_init(const char *font_path, float font_size)
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{
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(void)font_path;
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unsigned i;
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bm_renderer_t *handle = (bm_renderer_t*)calloc(1, sizeof(*handle));
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if (!handle)
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return NULL;
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handle->scale_factor = (unsigned)roundf(font_size / FONT_HEIGHT);
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if (!handle->scale_factor)
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handle->scale_factor = 1;
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handle->atlas.width = FONT_WIDTH * handle->scale_factor * ATLAS_COLS;
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handle->atlas.height = FONT_HEIGHT * handle->scale_factor * ATLAS_ROWS;
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handle->atlas.buffer = (uint8_t*)calloc(handle->atlas.width * handle->atlas.height, 1);
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for (i = 0; i < ATLAS_SIZE; i++)
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{
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unsigned x = (i % ATLAS_COLS) * handle->scale_factor * FONT_WIDTH;
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unsigned y = (i / ATLAS_COLS) * handle->scale_factor * FONT_HEIGHT;
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char_to_texture(handle, i, x, y);
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handle->glyphs[i].width = FONT_WIDTH * handle->scale_factor;
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handle->glyphs[i].height = FONT_HEIGHT * handle->scale_factor;
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handle->glyphs[i].atlas_offset_x = x;
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handle->glyphs[i].atlas_offset_y = y;
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handle->glyphs[i].draw_offset_x = 0;
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handle->glyphs[i].draw_offset_y = -FONT_HEIGHT_BASELINE * (int)handle->scale_factor;
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handle->glyphs[i].advance_x = (FONT_WIDTH + 1) * handle->scale_factor;
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handle->glyphs[i].advance_y = 0;
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}
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return handle;
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}
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static void font_renderer_free(void *data)
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{
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bm_renderer_t *handle = (bm_renderer_t*)data;
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if (!handle)
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return;
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free(handle->atlas.buffer);
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free(handle);
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}
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static const char *font_renderer_get_default_font(void)
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{
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return "";
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}
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font_renderer_driver_t bitmap_font_renderer = {
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font_renderer_init,
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font_renderer_get_atlas,
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font_renderer_get_glyph,
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font_renderer_free,
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font_renderer_get_default_font,
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"bitmap",
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};
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