diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/raylib.h | 3 | ||||
| -rw-r--r-- | src/text.c | 125 |
2 files changed, 127 insertions, 1 deletions
diff --git a/src/raylib.h b/src/raylib.h index 8535f8d5..0e9e0155 100644 --- a/src/raylib.h +++ b/src/raylib.h @@ -1110,7 +1110,8 @@ RLAPI void UnloadFont(Font font); // Text drawing functions RLAPI void DrawFPS(int posX, int posY); // Shows current FPS RLAPI void DrawText(const char *text, int posX, int posY, int fontSize, Color color); // Draw text (using default font) -RLAPI void DrawTextEx(Font font, const char *text, Vector2 position, float fontSize, float spacing, Color tint); // Draw text using font and additional parameters +RLAPI void DrawTextEx(Font font, const char *text, Vector2 position, float fontSize, float spacing, Color tint); // Draw text using font and additional parameters +RLAPI void DrawTextRec(Font font, const char *text, Rectangle rec, float fontSize, float spacing, bool wordWrap, Color tint); // Draw text using font inside rectangle limits // Text misc. functions RLAPI int MeasureText(const char *text, int fontSize); // Measure string width for default font @@ -779,6 +779,131 @@ void DrawTextEx(Font font, const char *text, Vector2 position, float fontSize, f } } +// Draw text using font inside rectangle limits +void DrawTextRec(Font font, const char *text, Rectangle rec, float fontSize, float spacing, bool wordWrap, Color tint) +{ + int length = strlen(text); + int textOffsetX = 0; // Offset between characters + int textOffsetY = 0; // Required for line break! + float scaleFactor = 0.0f; + + unsigned char letter = 0; // Current character + int index = 0; // Index position in sprite font + + scaleFactor = fontSize/font.baseSize; + + enum { MEASURE_WORD = 0, DRAW_WORD = 1 }; + int state = wordWrap ? MEASURE_WORD : DRAW_WORD; + int lastTextOffsetX = 0; + int wordStart = 0; + + bool firstWord = true; + + for (int i = 0; i < length; i++) + { + int glyphWidth = 0; + letter = (unsigned char)text[i]; + + if (letter != '\n') + { + if ((unsigned char)text[i] == 0xc2) // UTF-8 encoding identification HACK! + { + // Support UTF-8 encoded values from [0xc2 0x80] -> [0xc2 0xbf](¿) + letter = (unsigned char)text[i + 1]; + index = GetGlyphIndex(font, (int)letter); + i++; + } + else if ((unsigned char)text[i] == 0xc3) // UTF-8 encoding identification HACK! + { + // Support UTF-8 encoded values from [0xc3 0x80](À) -> [0xc3 0xbf](ÿ) + letter = (unsigned char)text[i + 1]; + index = GetGlyphIndex(font, (int)letter + 64); + i++; + } + else index = GetGlyphIndex(font, (unsigned char)text[i]); + + glyphWidth = (font.chars[index].advanceX == 0)? + (int)(font.chars[index].rec.width*scaleFactor + spacing): + (int)(font.chars[index].advanceX*scaleFactor + spacing); + } + + // NOTE: When word wrap is active first we measure a `word`(measure until a ' ','\n','\t' is found) + // then set all the variables back to what they were before the measurement, change the state to + // draw that word then change the state again and repeat until the end of the string...when the word + // doesn't fit inside the rect we simple increase `textOffsetY` to draw it on the next line + if (state == MEASURE_WORD) + { + // Measuring state + if ((letter == ' ') || (letter == '\n') || (letter == '\t') || ((i + 1) == length)) + { + int t = textOffsetX + glyphWidth; + + if (textOffsetX+1>=rec.width) + { + textOffsetY += (int)((font.baseSize + font.baseSize/2)*scaleFactor); + lastTextOffsetX = t - lastTextOffsetX; + textOffsetX = 0; + } + else + { + textOffsetX = lastTextOffsetX; + lastTextOffsetX = t; + } + + glyphWidth = 0; + state = !state; // Change state + t = i; + i = firstWord?-1:wordStart; + wordStart = t; + } + } + else + { + // Drawing state + int t = textOffsetX + glyphWidth; + + if (letter == '\n') + { + textOffsetY += (int)((font.baseSize + font.baseSize/2)*scaleFactor); + lastTextOffsetX = t - lastTextOffsetX; + if (lastTextOffsetX < 0) lastTextOffsetX = 0; + textOffsetX = 0; + } + else if ((letter != ' ') && (letter != '\t')) + { + if ((t + 1) >= rec.width) + { + textOffsetY += (int)((font.baseSize + font.baseSize/2)*scaleFactor); + textOffsetX = 0; + } + + if ((textOffsetY + (int)((font.baseSize + font.baseSize/2)*scaleFactor)) > rec.height) break; + + DrawTexturePro(font.texture, font.chars[index].rec, + (Rectangle){ rec.x + textOffsetX + font.chars[index].offsetX*scaleFactor, + rec.y + textOffsetY + font.chars[index].offsetY*scaleFactor, + font.chars[index].rec.width*scaleFactor, + font.chars[index].rec.height*scaleFactor }, (Vector2){ 0, 0 }, 0.0f, tint); + } + + if (wordWrap) + { + if ((letter == ' ') || (letter == '\n') || (letter == '\t')) + { + // After drawing a word change the state + firstWord = false; + i = wordStart; + textOffsetX = lastTextOffsetX; + glyphWidth = 0; + state = !state; + } + } + } + + textOffsetX += glyphWidth; + } +} + // Measure string width for default font int MeasureText(const char *text, int fontSize) { |