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Diffstat (limited to 'source/bit-font2.c')
| -rw-r--r-- | source/bit-font2.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/source/bit-font2.c b/source/bit-font2.c new file mode 100644 index 0000000..91c001b --- /dev/null +++ b/source/bit-font2.c @@ -0,0 +1,141 @@ +/* + Copyright 2022 Bga <bga.email@gmail.com> + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + http://www.apache.org/licenses/LICENSE-2.0 + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + + Modified by tcsullivan: + - compacted code to only what is required + - changed ordering of font bitmap data for easier rendering + - added functional interface +*/ + +#include <stdint.h> + +#define MAKE_GLYPH(hi, lo) (((hi * 3) << 8) | lo * 3) + +const uint8_t halfGlyphData[] = { + 0x00, 0x00, 0x00, + 0x0C, 0x03, 0x00, + 0x0C, 0xC3, 0x30, + 0xF3, 0x3C, 0xCF, + 0xFF, 0x3C, 0xCF, + 0xF3, 0x3C, 0xFF, + 0xFF, 0x3C, 0xFF, + 0x3F, 0x0C, 0xFF, + 0xFF, 0x30, 0xFC, + 0xCF, 0x30, 0xFC, + 0xC3, 0x30, 0xFC, + 0x3F, 0x0C, 0xC3, + 0xFF, 0x30, 0x0C, + 0x0C, 0xC3, 0xFC, + 0xFF, 0x3F, 0x87, + 0xE1, 0xFC, 0xFF, + 0xF3, 0xEC, 0x31, + 0xCC, 0x3F, 0xCF, + 0xF3, 0x6C, 0xF3, + 0xBC, 0x3D, 0xCF, + 0x37, 0x0C, 0xFF, + 0xFE, 0x3C, 0xFB, + 0x30, 0x0C, 0xC3, + 0x30, 0x3C, 0xFF, +}; + +const uint16_t glyphData[] = { + /* d0 */ MAKE_GLYPH(5, 4), + /* d1 */ MAKE_GLYPH(2, 2), + /* d2 */ MAKE_GLYPH(8, 11), + /* d3 */ MAKE_GLYPH(9, 12), + /* d4 */ MAKE_GLYPH(4, 10), + /* d5 */ MAKE_GLYPH(7, 8), + /* d6 */ MAKE_GLYPH(7, 4), + /* d7 */ MAKE_GLYPH(9, 2), + /* d8 */ MAKE_GLYPH(6, 4), + /* d9 */ MAKE_GLYPH(6, 12), + /* space */ MAKE_GLYPH(0, 0), + /* dot */ MAKE_GLYPH(0, 1), + /* comma */ MAKE_GLYPH(0, 2), + /* colon */ MAKE_GLYPH(1, 1), + /* asterick */ MAKE_GLYPH(2, 1), + /* questionMark */ MAKE_GLYPH(9, 1), + /* quote */ MAKE_GLYPH(2, 0), + /* doubleQuote */ MAKE_GLYPH(3, 0), + /* lowTriangle */ MAKE_GLYPH(1, 4), + /* A */ MAKE_GLYPH(6, 3), + /* B */ MAKE_GLYPH(21, 21), + /* C */ MAKE_GLYPH(23, 4), + /* D */ MAKE_GLYPH(18, 19), + /* E */ MAKE_GLYPH(7, 7), + /* F */ MAKE_GLYPH(7, 22), + /* G */ MAKE_GLYPH(20, 4), + /* H */ MAKE_GLYPH(4, 3), + /* I */ MAKE_GLYPH(2, 2), + /* J */ MAKE_GLYPH(10, 4), + /* K */ MAKE_GLYPH(19, 18), + /* L */ MAKE_GLYPH(22, 11), + /* M */ MAKE_GLYPH(14, 3), + /* N */ MAKE_GLYPH(18, 3), + /* O */ MAKE_GLYPH(5, 4), + /* P */ MAKE_GLYPH(6, 22), + /* Q */ MAKE_GLYPH(5, 17), + /* R */ MAKE_GLYPH(6, 18), + /* S */ MAKE_GLYPH(7, 8), + /* T */ MAKE_GLYPH(13, 2), + /* U */ MAKE_GLYPH(3, 4), + /* V */ MAKE_GLYPH(3, 19), + /* W */ MAKE_GLYPH(3, 15), + /* X */ MAKE_GLYPH(17, 16), + /* Y */ MAKE_GLYPH(4, 2), + /* Z */ MAKE_GLYPH(9, 11), + /* caret */ MAKE_GLYPH(16, 0), + /* squareBracketOpen */ MAKE_GLYPH(23, 17), + /* squareBracketClose */ MAKE_GLYPH(10, 12) +}; + +const char glyphKeys[47] = { + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', + ' ', + '.', + ',', + ':', + '!', + '?', + '\'', + '"', + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', + '^', + '[', + ']' +}; + +const uint8_t *bitfontGetBitmapLo(unsigned int gindex) +{ + if (gindex < sizeof(glyphKeys)) + return halfGlyphData + (glyphData[gindex] & 0x00FF); + else + return 0; +} + +const uint8_t *bitfontGetBitmapHi(unsigned int gindex) +{ + if (gindex < sizeof(glyphKeys)) + return halfGlyphData + ((glyphData[gindex] >> 8) & 0xFF); + else + return 0; +} + +unsigned int bitfontGetGlyph(char c) +{ + for (unsigned int i = 0; i < sizeof(glyphKeys); ++i) { + if (glyphKeys[i] == c) + return i; + } + + return 15; // Glyph for '?' +} |