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https://github.com/GRRLIB/GRRLIB.git
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Remove mbstowcs + malloc by using custom utf8 to code point code
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parent
159ba73f5c
commit
ba4996e6f2
1 changed files with 109 additions and 15 deletions
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@ -100,15 +100,67 @@ void GRRLIB_PrintfTTF(int x, int y, GRRLIB_ttfFont *myFont, const char *string,
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return;
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}
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size_t length = strlen(string) + 1;
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wchar_t *utf32 = (wchar_t*)malloc(length * sizeof(wchar_t));
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if (utf32 != NULL) {
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length = mbstowcs(utf32, string, length);
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if (length > 0) {
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utf32[length] = L'\0';
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GRRLIB_PrintfTTFW(x, y, myFont, utf32, fontSize, color);
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FT_Face Face = (FT_Face)myFont->face;
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int penX = 0;
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int penY = fontSize;
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FT_GlyphSlot slot = Face->glyph;
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FT_UInt previousGlyph = 0;
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const u8 cR = R(color);
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const u8 cG = G(color);
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const u8 cB = B(color);
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const u8 cA = A(color);
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if (FT_Set_Pixel_Sizes(Face, 0, fontSize) != 0) {
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FT_Set_Pixel_Sizes(Face, 0, 12);
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}
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free(utf32);
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/* Loop over each character, until the
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* end of the string is reached, or until the pixel width is too wide */
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while(*string) {
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wchar_t wchar;
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if (((*(string + 0)) & 0x80) == 0x00) {
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// Single-byte character (ASCII)
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wchar = (wchar_t)*string;
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string += 1;
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}
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else if (((*(string + 0)) & 0xE0) == 0xC0 && ((*(string + 1)) & 0xC0) == 0x80) {
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// Two-byte character
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wchar = ((wchar_t)(*string & 0x1F) << 6) | ((wchar_t)(*(string + 1)) & 0x3F);
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string += 2;
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}
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else if (((*(string + 0)) & 0xF0) == 0xE0 && ((*(string + 1)) & 0xC0) == 0x80 && ((*(string + 2)) & 0xC0) == 0x80) {
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// Three-byte character
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wchar = ((wchar_t)(*string & 0x0F) << 12) | ((wchar_t)(*(string + 1) & 0x3F) << 6) | ((wchar_t)(*(string + 2)) & 0x3F);
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string += 3;
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}
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else if (((*(string + 0)) & 0xF8) == 0xF0 && ((*(string + 1)) & 0xC0) == 0x80 && ((*(string + 2)) & 0xC0) == 0x80 && ((*(string + 3)) & 0xC0) == 0x80) {
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// Four-byte character
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wchar = ((wchar_t)(*string & 0x07) << 18) | ((wchar_t)(*(string + 1) & 0x3F) << 12) | ((wchar_t)(*(string + 2) & 0x3F) << 6) | ((wchar_t)(*(string + 3)) & 0x3F);
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string += 4;
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}
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else {
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// Invalid UTF-8 sequence
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string++;
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continue;
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}
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const FT_UInt glyphIndex = FT_Get_Char_Index(myFont->face, wchar);
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if (myFont->kerning && previousGlyph && glyphIndex) {
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FT_Vector delta;
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FT_Get_Kerning(myFont->face, previousGlyph, glyphIndex, FT_KERNING_DEFAULT, &delta);
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penX += delta.x >> 6;
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}
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if (FT_Load_Glyph(myFont->face, glyphIndex, FT_LOAD_RENDER) != 0) {
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continue;
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}
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DrawBitmap(&slot->bitmap,
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penX + slot->bitmap_left + x,
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penY - slot->bitmap_top + y,
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cR, cG, cB, cA);
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penX += slot->advance.x >> 6;
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previousGlyph = glyphIndex;
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}
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}
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@ -203,15 +255,57 @@ u32 GRRLIB_WidthTTF(GRRLIB_ttfFont *myFont, const char *string, unsigned int fon
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if (myFont == NULL || string == NULL) {
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return 0;
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}
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u32 penX;
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size_t length = strlen(string) + 1;
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wchar_t *utf32 = (wchar_t*)malloc(length * sizeof(wchar_t));
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length = mbstowcs(utf32, string, length);
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utf32[length] = L'\0';
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penX = GRRLIB_WidthTTFW(myFont, utf32, fontSize);
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FT_Face Face = (FT_Face)myFont->face;
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u32 penX = 0;
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FT_UInt previousGlyph = 0;
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free(utf32);
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if (FT_Set_Pixel_Sizes(myFont->face, 0, fontSize) != 0) {
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FT_Set_Pixel_Sizes(myFont->face, 0, 12);
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}
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while(*string) {
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wchar_t wchar;
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if (((*(string + 0)) & 0x80) == 0x00) {
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// Single-byte character (ASCII)
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wchar = (wchar_t)*string;
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string += 1;
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}
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else if (((*(string + 0)) & 0xE0) == 0xC0 && ((*(string + 1)) & 0xC0) == 0x80) {
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// Two-byte character
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wchar = ((wchar_t)(*string & 0x1F) << 6) | ((wchar_t)(*(string + 1)) & 0x3F);
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string += 2;
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}
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else if (((*(string + 0)) & 0xF0) == 0xE0 && ((*(string + 1)) & 0xC0) == 0x80 && ((*(string + 2)) & 0xC0) == 0x80) {
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// Three-byte character
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wchar = ((wchar_t)(*string & 0x0F) << 12) | ((wchar_t)(*(string + 1) & 0x3F) << 6) | ((wchar_t)(*(string + 2)) & 0x3F);
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string += 3;
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}
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else if (((*(string + 0)) & 0xF8) == 0xF0 && ((*(string + 1)) & 0xC0) == 0x80 && ((*(string + 2)) & 0xC0) == 0x80 && ((*(string + 3)) & 0xC0) == 0x80) {
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// Four-byte character
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wchar = ((wchar_t)(*string & 0x07) << 18) | ((wchar_t)(*(string + 1) & 0x3F) << 12) | ((wchar_t)(*(string + 2) & 0x3F) << 6) | ((wchar_t)(*(string + 3)) & 0x3F);
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string += 4;
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}
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else {
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// Invalid UTF-8 sequence
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string++;
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continue;
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}
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const FT_UInt glyphIndex = FT_Get_Char_Index(myFont->face, wchar);
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if (myFont->kerning && previousGlyph && glyphIndex) {
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FT_Vector delta;
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FT_Get_Kerning(Face, previousGlyph, glyphIndex, FT_KERNING_DEFAULT, &delta);
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penX += delta.x >> 6;
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}
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if (FT_Load_Glyph(Face, glyphIndex, FT_LOAD_RENDER) != 0) {
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continue;
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}
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penX += Face->glyph->advance.x >> 6;
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previousGlyph = glyphIndex;
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}
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return penX;
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}
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