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ADDED: DrawTextRec() and example

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raysan5 2018-12-29 14:44:28 +01:00
parent 95d3f24c68
commit 0619571149
4 changed files with 247 additions and 1 deletions
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125
src/text.c
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@ -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)
{