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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 55 | pj | 1 | |
| 2 | /* Copyright (c) Mark J. Kilgard, 1994. */ |
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| 3 | |||
| 4 | /* This program is freely distributable without licensing fees |
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| 5 | and is provided without guarantee or warrantee expressed or |
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| 6 | implied. This program is -not- in the public domain. */ |
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| 7 | |||
| 8 | #include "glutbitmap.h" |
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| 9 | |||
| 10 | void APIENTRY |
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| 11 | glutBitmapCharacter(GLUTbitmapFont font, int c) |
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| 12 | { |
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| 13 | const BitmapCharRec *ch; |
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| 14 | BitmapFontPtr fontinfo; |
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| 15 | GLint swapbytes, lsbfirst, rowlength; |
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| 16 | GLint skiprows, skippixels, alignment; |
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| 17 | |||
| 18 | #if defined(_WIN32) |
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| 19 | fontinfo = (BitmapFontPtr) __glutFont(font); |
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| 20 | #else |
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| 21 | fontinfo = (BitmapFontPtr) font; |
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| 22 | #endif |
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| 23 | |||
| 24 | if (c < fontinfo->first || |
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| 25 | c >= fontinfo->first + fontinfo->num_chars) |
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| 26 | return; |
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| 27 | ch = fontinfo->ch[c - fontinfo->first]; |
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| 28 | if (ch) { |
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| 29 | /* Save current modes. */ |
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| 30 | glGetIntegerv(GL_UNPACK_SWAP_BYTES, &swapbytes); |
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| 31 | glGetIntegerv(GL_UNPACK_LSB_FIRST, &lsbfirst); |
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| 32 | glGetIntegerv(GL_UNPACK_ROW_LENGTH, &rowlength); |
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| 33 | glGetIntegerv(GL_UNPACK_SKIP_ROWS, &skiprows); |
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| 34 | glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &skippixels); |
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| 35 | glGetIntegerv(GL_UNPACK_ALIGNMENT, &alignment); |
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| 36 | /* Little endian machines (DEC Alpha for example) could |
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| 37 | benefit from setting GL_UNPACK_LSB_FIRST to GL_TRUE |
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| 38 | instead of GL_FALSE, but this would require changing the |
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| 39 | generated bitmaps too. */ |
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| 40 | glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE); |
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| 41 | glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE); |
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| 42 | glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); |
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| 43 | glPixelStorei(GL_UNPACK_SKIP_ROWS, 0); |
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| 44 | glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); |
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| 45 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
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| 46 | glBitmap(ch->width, ch->height, ch->xorig, ch->yorig, |
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| 47 | ch->advance, 0, ch->bitmap); |
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| 48 | /* Restore saved modes. */ |
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| 49 | glPixelStorei(GL_UNPACK_SWAP_BYTES, swapbytes); |
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| 50 | glPixelStorei(GL_UNPACK_LSB_FIRST, lsbfirst); |
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| 51 | glPixelStorei(GL_UNPACK_ROW_LENGTH, rowlength); |
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| 52 | glPixelStorei(GL_UNPACK_SKIP_ROWS, skiprows); |
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| 53 | glPixelStorei(GL_UNPACK_SKIP_PIXELS, skippixels); |
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| 54 | glPixelStorei(GL_UNPACK_ALIGNMENT, alignment); |
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| 55 | } |
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| 56 | } |