456 lines
13 KiB
C
456 lines
13 KiB
C
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// Copyright(c) 2015-2016 YamaArashi
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "global.h"
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#include "font.h"
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#include "gfx.h"
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#include "util.h"
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unsigned char gFontPalette[][3] =
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{
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{0xFF, 0xFF, 0xFF}, // bg (white)
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{0x38, 0x38, 0x38}, // fg (dark grey)
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{0xD8, 0xD8, 0xD8}, // shadow (light grey)
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};
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void ConvertFromTiles1Bpp(unsigned char *src, unsigned char *dest, int numGlyphs, int layout)
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{
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for (int glyph = 0; glyph < numGlyphs; glyph++)
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{
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if (layout == 0)
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{
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for (int i = 0; i < 8; i++)
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{
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uint8_t srcRow = src[(glyph * 8) + i];
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 8) + i;
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dest[(y * 128) + x] = (srcRow >> (7 - j)) & 1;
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}
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}
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}
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else
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{
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// layout type 1
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int tile1Offset = glyph * 16;
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int tile2Offset = tile1Offset + 8;
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for (int i = 0; i < 8; i++)
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{
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uint8_t srcRow = src[tile1Offset + i];
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 16) + i;
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dest[(y * 128) + x] = (srcRow >> (7 - j)) & 1;
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}
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}
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for (int i = 0; i < 8; i++)
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{
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uint8_t srcRow = src[tile2Offset + i];
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 16) + 8 + i;
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dest[(y * 128) + x] = (srcRow >> (7 - j)) & 1;
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}
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}
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}
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}
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}
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void ConvertToTiles1Bpp(unsigned char *src, unsigned char *dest, int numGlyphs, int layout)
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{
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for (int glyph = 0; glyph < numGlyphs; glyph++)
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{
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if (layout == 0)
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{
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for (int i = 0; i < 8; i++)
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{
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uint8_t destRow = 0;
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 8) + i;
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unsigned char color = src[(y * 128) + x];
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if (color > 1)
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FATAL_ERROR("More than 2 colors in 1 BPP font.\n");
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destRow <<= 1;
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destRow |= color;
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}
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dest[(glyph * 8) + i] = destRow;
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}
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}
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else
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{
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// layout type 1
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int tile1Offset = glyph * 16;
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int tile2Offset = tile1Offset + 8;
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for (int i = 0; i < 8; i++)
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{
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uint8_t destRow = 0;
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 16) + i;
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unsigned char color = src[(y * 128) + x];
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if (color > 1)
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FATAL_ERROR("More than 2 colors in 1 BPP font.\n");
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destRow <<= 1;
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destRow |= color;
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}
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dest[tile1Offset + i] = destRow;
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}
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for (int i = 0; i < 8; i++)
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{
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uint8_t destRow = 0;
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 16) + 8 + i;
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unsigned char color = src[(y * 128) + x];
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if (color > 1)
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FATAL_ERROR("More than 2 colors in 1 BPP font.\n");
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destRow <<= 1;
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destRow |= color;
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}
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dest[tile2Offset + i] = destRow;
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}
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}
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}
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}
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void ConvertFromTiles4Bpp(unsigned char *src, unsigned char *dest, int numGlyphs, int layout)
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{
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static unsigned char table[16] =
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{
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1,
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};
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for (int glyph = 0; glyph < numGlyphs; glyph++)
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{
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if (layout == 0)
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{
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int offset = glyph * 32;
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for (int i = 0; i < 8; i++)
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{
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uint32_t srcRow = (src[offset + 3] << 24)
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| (src[offset + 2] << 16)
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| (src[offset + 1] << 8)
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| src[offset];
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 8) + i;
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dest[(y * 128) + x] = table[srcRow & 0xF];
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srcRow >>= 4;
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}
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offset += 4;
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}
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}
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else
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{
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int tile1Offset;
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int tile2Offset;
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if (layout == 1)
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{
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tile1Offset = glyph * 64;
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tile2Offset = tile1Offset + 32;
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}
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else
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{
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tile1Offset = ((glyph / 16) * 1024) + ((glyph % 16) * 32);
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tile2Offset = tile1Offset + 512;
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}
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for (int i = 0; i < 8; i++)
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{
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uint32_t srcRow = (src[tile1Offset + 3] << 24)
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| (src[tile1Offset + 2] << 16)
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| (src[tile1Offset + 1] << 8)
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| src[tile1Offset];
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 16) + i;
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dest[(y * 128) + x] = table[srcRow & 0xF];
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srcRow >>= 4;
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}
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tile1Offset += 4;
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}
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for (int i = 0; i < 8; i++)
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{
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uint32_t srcRow = (src[tile2Offset + 3] << 24)
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| (src[tile2Offset + 2] << 16)
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| (src[tile2Offset + 1] << 8)
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| src[tile2Offset];
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 16) + 8 + i;
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dest[(y * 128) + x] = table[srcRow & 0xF];
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srcRow >>= 4;
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}
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tile2Offset += 4;
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}
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}
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}
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}
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void ConvertToTiles4Bpp(unsigned char *src, unsigned char *dest, int numGlyphs, int layout)
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{
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static unsigned char table[3] =
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{
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0, 15, 14,
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};
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for (int glyph = 0; glyph < numGlyphs; glyph++)
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{
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if (layout == 0)
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{
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int offset = glyph * 32;
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for (int i = 0; i < 8; i++)
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{
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uint32_t destRow = 0;
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 8) + i;
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unsigned char color = src[(y * 128) + x];
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if (color > 2)
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FATAL_ERROR("More than 3 colors in 4 BPP font.\n");
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destRow >>= 4;
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destRow |= (table[color] << 28);
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}
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dest[offset] = destRow & 0xFF;
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dest[offset + 1] = (destRow >> 8) & 0xFF;
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dest[offset + 2] = (destRow >> 16) & 0xFF;
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dest[offset + 3] = (destRow >> 24) & 0xFF;
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offset += 4;
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}
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}
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else
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{
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int tile1Offset;
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int tile2Offset;
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if (layout == 1)
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{
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tile1Offset = glyph * 64;
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tile2Offset = tile1Offset + 32;
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}
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else
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{
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tile1Offset = ((glyph / 16) * 1024) + ((glyph % 16) * 32);
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tile2Offset = tile1Offset + 512;
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}
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for (int i = 0; i < 8; i++)
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{
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uint32_t destRow = 0;
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 16) + i;
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unsigned char color = src[(y * 128) + x];
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if (color > 2)
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FATAL_ERROR("More than 3 colors in 4 BPP font.\n");
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destRow >>= 4;
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destRow |= (table[color] << 28);
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}
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dest[tile1Offset] = destRow & 0xFF;
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dest[tile1Offset + 1] = (destRow >> 8) & 0xFF;
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dest[tile1Offset + 2] = (destRow >> 16) & 0xFF;
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dest[tile1Offset + 3] = (destRow >> 24) & 0xFF;
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tile1Offset += 4;
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}
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for (int i = 0; i < 8; i++)
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{
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uint32_t destRow = 0;
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for (int j = 0; j < 8; j++)
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{
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int x = ((glyph % 16) * 8) + j;
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int y = ((glyph / 16) * 16) + 8 + i;
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unsigned char color = src[(y * 128) + x];
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if (color > 2)
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FATAL_ERROR("More than 3 colors in 4 BPP font.\n");
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destRow >>= 4;
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destRow |= (table[color] << 28);
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}
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dest[tile2Offset] = destRow & 0xFF;
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dest[tile2Offset + 1] = (destRow >> 8) & 0xFF;
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dest[tile2Offset + 2] = (destRow >> 16) & 0xFF;
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dest[tile2Offset + 3] = (destRow >> 24) & 0xFF;
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tile2Offset += 4;
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}
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}
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}
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}
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static void SetFontPalette(struct Image *image)
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{
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image->hasPalette = true;
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image->palette.numColors = 3;
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for (int i = 0; i < image->palette.numColors; i++)
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{
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image->palette.colors[i].red = gFontPalette[i][0];
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image->palette.colors[i].green = gFontPalette[i][1];
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image->palette.colors[i].blue = gFontPalette[i][2];
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}
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image->hasTransparency = false;
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}
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int CalcFileSize(int numGlyphs, int bpp, int layout)
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{
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if (layout == 2)
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{
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// assume 4 BPP
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int numFullRows = numGlyphs / 16;
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int remainder = numGlyphs % 16;
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int fullRowsSize = numFullRows * 1024;
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int remainderSize = 0;
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if (remainder != 0)
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remainderSize = 1024 - (16 - remainder) * 32;
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return fullRowsSize + remainderSize;
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}
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else
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{
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int tilesPerGlyph = layout > 0 ? 2 : 1;
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int bytesPerTile = 8 * bpp;
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return numGlyphs * tilesPerGlyph * bytesPerTile;
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}
|
||
|
|
}
|
||
|
|
|
||
|
|
void ReadFont(char *path, struct Image *image, int numGlyphs, int bpp, int layout)
|
||
|
|
{
|
||
|
|
int fileSize;
|
||
|
|
unsigned char *buffer = ReadWholeFile(path, &fileSize);
|
||
|
|
|
||
|
|
int expectedFileSize = CalcFileSize(numGlyphs, bpp, layout);
|
||
|
|
|
||
|
|
if (fileSize != expectedFileSize)
|
||
|
|
FATAL_ERROR("The file size is %d but should be %d.\n", fileSize, expectedFileSize);
|
||
|
|
|
||
|
|
int numRows = (numGlyphs + 15) / 16;
|
||
|
|
int rowHeight = layout > 0 ? 16 : 8;
|
||
|
|
|
||
|
|
image->width = 128;
|
||
|
|
image->height = numRows * rowHeight;
|
||
|
|
image->bitDepth = 8;
|
||
|
|
image->pixels = calloc(image->width * image->height, 1);
|
||
|
|
|
||
|
|
if (image->pixels == NULL)
|
||
|
|
FATAL_ERROR("Failed to allocate memory for font.\n");
|
||
|
|
|
||
|
|
if (bpp == 1)
|
||
|
|
ConvertFromTiles1Bpp(buffer, image->pixels, numGlyphs, layout);
|
||
|
|
else
|
||
|
|
ConvertFromTiles4Bpp(buffer, image->pixels, numGlyphs, layout);
|
||
|
|
|
||
|
|
free(buffer);
|
||
|
|
|
||
|
|
SetFontPalette(image);
|
||
|
|
}
|
||
|
|
|
||
|
|
void WriteFont(char *path, struct Image *image, int numGlyphs, int bpp, int layout)
|
||
|
|
{
|
||
|
|
if (image->width != 128)
|
||
|
|
FATAL_ERROR("The width of the font image (%d) is not 128.\n", image->width);
|
||
|
|
|
||
|
|
int numRows = (numGlyphs + 15) / 16;
|
||
|
|
int rowHeight = layout > 0 ? 16 : 8;
|
||
|
|
int expectedHeight = numRows * rowHeight;
|
||
|
|
|
||
|
|
if (image->height < expectedHeight)
|
||
|
|
FATAL_ERROR("The height of the font image (%d) is less than %d.\n", image->height, expectedHeight);
|
||
|
|
|
||
|
|
int fileSize = CalcFileSize(numGlyphs, bpp, layout);
|
||
|
|
|
||
|
|
unsigned char *buffer = calloc(fileSize, 1);
|
||
|
|
|
||
|
|
if (buffer == NULL)
|
||
|
|
FATAL_ERROR("Failed to allocate memory for font.\n");
|
||
|
|
|
||
|
|
if (bpp == 1)
|
||
|
|
ConvertToTiles1Bpp(image->pixels, buffer, numGlyphs, layout);
|
||
|
|
else
|
||
|
|
ConvertToTiles4Bpp(image->pixels, buffer, numGlyphs, layout);
|
||
|
|
|
||
|
|
WriteWholeFile(path, buffer, fileSize);
|
||
|
|
|
||
|
|
free(buffer);
|
||
|
|
}
|