add alternative font drawing for GL

This commit is contained in:
Toad King 2012-12-13 15:12:06 -05:00
parent bb1e2a4677
commit 59bc3d4ba7
3 changed files with 260 additions and 0 deletions

121
gfx/fonts/bitmap.h Normal file
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@ -0,0 +1,121 @@
#define FONT_WIDTH 5
#define FONT_HEIGHT 10
#define FONT_WIDTH_STRIDE (FONT_WIDTH + 1)
#define FONT_HEIGHT_STRIDE (FONT_HEIGHT + 1)
#define FONT_OFFSET(x) ((x) * ((FONT_HEIGHT * FONT_WIDTH + 7) / 8))
const unsigned char bitmap_bin[1792] = {
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};

138
gfx/fonts/bitmapfont.c Normal file
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@ -0,0 +1,138 @@
/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "fonts.h"
#include "bitmap.h"
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include "../../general.h"
static uint8_t bitmap_chars[256][50];
struct font_renderer
{
unsigned scale_factor;
};
static void char_to_texture(uint8_t letter, uint8_t *buffer)
{
for (unsigned j = 0; j < FONT_HEIGHT; j++)
{
for (unsigned i = 0; i < FONT_WIDTH; i++)
{
uint8_t rem = 1 << ((i + j * FONT_WIDTH) & 7);
unsigned offset = (i + j * FONT_WIDTH) >> 3;
bool col = (bitmap_bin[FONT_OFFSET(letter) + offset] & rem);
buffer[i + j * FONT_WIDTH] = col ? 0xFF : 0;
}
}
}
font_renderer_t *font_renderer_new(const char *font_path, unsigned font_size)
{
(void)font_size;
font_renderer_t *handle = (font_renderer_t*)calloc(1, sizeof(*handle));
if (!handle)
return NULL;
handle->scale_factor = font_size / FONT_HEIGHT;
if (!handle->scale_factor)
handle->scale_factor = 1;
RARCH_LOG("scale_factor: %d\n", handle->scale_factor);
for (unsigned i = 0; i < 256; i++)
char_to_texture(i, bitmap_chars[i]);
return handle;
}
void font_renderer_msg(font_renderer_t *handle, const char *msg, struct font_output_list *output)
{
output->head = NULL;
struct font_output *cur = NULL;
size_t len = strlen(msg);
int off_x = 0;
for (size_t i = 0; i < len; i++)
{
struct font_output *tmp = (struct font_output*)calloc(1, sizeof(*tmp));
if (!tmp)
break;
tmp->output = (uint8_t*)malloc(FONT_WIDTH * FONT_HEIGHT * handle->scale_factor * handle->scale_factor);
if (!tmp->output)
{
free(tmp);
break;
}
unsigned msg_char = msg[i];
for (unsigned x = 0; x < FONT_WIDTH; x++)
for (unsigned y = 0; y < FONT_HEIGHT; y++)
for (unsigned xo = 0; xo < handle->scale_factor; xo++)
for (unsigned yo = 0; yo < handle->scale_factor; yo++)
tmp->output[x * handle->scale_factor + xo + (y * handle->scale_factor + yo) * FONT_WIDTH * handle->scale_factor] = bitmap_chars[msg_char][x + y * FONT_WIDTH];
tmp->width = FONT_WIDTH * handle->scale_factor;
tmp->height = FONT_HEIGHT * handle->scale_factor;
tmp->pitch = tmp->width;
tmp->advance_x = tmp->width;
tmp->advance_y = tmp->height;
tmp->char_off_x = 0;
tmp->char_off_y = tmp->height;
tmp->off_x = off_x;
tmp->off_y = 0;
tmp->next = NULL;
if (i == 0)
output->head = tmp;
else
cur->next = tmp;
cur = tmp;
off_x += FONT_WIDTH_STRIDE * handle->scale_factor;
}
}
void font_renderer_free_output(struct font_output_list *output)
{
struct font_output *itr = output->head;
struct font_output *tmp = NULL;
while (itr != NULL)
{
free(itr->output);
tmp = itr;
itr = itr->next;
free(tmp);
}
output->head = NULL;
}
void font_renderer_free(font_renderer_t *handle)
{
free(handle);
}
const char *font_renderer_get_default_font(void)
{
return "";
}

View File

@ -134,6 +134,7 @@ void font_renderer_free(font_renderer_t *handle)
FT_Done_Face(handle->face);
if (handle->lib)
FT_Done_FreeType(handle->lib);
free(handle);
}
// Not the cleanest way to do things for sure, but should hopefully work ... :)