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Exposed LoadFontFromImage()

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Ray 2018-12-20 12:58:27 +01:00
parent 5aea693f69
commit 87ad244ee0
3 changed files with 117 additions and 117 deletions
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1
src/raylib.h
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@ -1096,6 +1096,7 @@ RLAPI void DrawTextureNPatch(Texture2D texture, NPatchInfo nPatchInfo, Rectangle
RLAPI Font GetFontDefault(void); // Get the default Font
RLAPI Font LoadFont(const char *fileName); // Load font from file into GPU memory (VRAM)
RLAPI Font LoadFontEx(const char *fileName, int fontSize, int charsCount, int *fontChars); // Load font from file with extended parameters
RLAPI Font LoadFontFromImage(Image image, Color key, int firstChar); // Load font from Image (XNA style)
RLAPI CharInfo *LoadFontData(const char *fileName, int fontSize, int *fontChars, int charsCount, int type); // Load font data for further use
RLAPI Image GenImageFontAtlas(CharInfo *chars, int charsCount, int fontSize, int padding, int packMethod); // Generate image font atlas using chars info
RLAPI void UnloadFont(Font font); // Unload Font from GPU memory (VRAM)

233
src/text.c
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@ -86,7 +86,6 @@ static Font defaultFont; // Default font provided by raylib
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
static Font LoadImageFont(Image image, Color key, int firstChar); // Load a Image font file (XNA style)
#if defined(SUPPORT_FILEFORMAT_FNT)
static Font LoadBMFont(const char *fileName); // Load a BMFont file (AngelCode font file)
#endif
@ -285,7 +284,7 @@ Font LoadFont(const char *fileName)
#endif
{
Image image = LoadImage(fileName);
if (image.data != NULL) font = LoadImageFont(image, MAGENTA, DEFAULT_FIRST_CHAR);
if (image.data != NULL) font = LoadFontFromImage(image, MAGENTA, DEFAULT_FIRST_CHAR);
UnloadImage(image);
}
@ -321,6 +320,121 @@ Font LoadFontEx(const char *fileName, int fontSize, int charsCount, int *fontCha
return font;
}
// Load an Image font file (XNA style)
Font LoadFontFromImage(Image image, Color key, int firstChar)
{
#define COLOR_EQUAL(col1, col2) ((col1.r == col2.r)&&(col1.g == col2.g)&&(col1.b == col2.b)&&(col1.a == col2.a))
int charSpacing = 0;
int lineSpacing = 0;
int x = 0;
int y = 0;
// Default number of characters supported
#define MAX_FONTCHARS 256
// We allocate a temporal arrays for chars data measures,
// once we get the actual number of chars, we copy data to a sized arrays
int tempCharValues[MAX_FONTCHARS];
Rectangle tempCharRecs[MAX_FONTCHARS];
Color *pixels = GetImageData(image);
// Parse image data to get charSpacing and lineSpacing
for (y = 0; y < image.height; y++)
{
for (x = 0; x < image.width; x++)
{
if (!COLOR_EQUAL(pixels[y*image.width + x], key)) break;
}
if (!COLOR_EQUAL(pixels[y*image.width + x], key)) break;
}
charSpacing = x;
lineSpacing = y;
int charHeight = 0;
int j = 0;
while (!COLOR_EQUAL(pixels[(lineSpacing + j)*image.width + charSpacing], key)) j++;
charHeight = j;
// Check array values to get characters: value, x, y, w, h
int index = 0;
int lineToRead = 0;
int xPosToRead = charSpacing;
// Parse image data to get rectangle sizes
while ((lineSpacing + lineToRead*(charHeight + lineSpacing)) < image.height)
{
while ((xPosToRead < image.width) &&
!COLOR_EQUAL((pixels[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*image.width + xPosToRead]), key))
{
tempCharValues[index] = firstChar + index;
tempCharRecs[index].x = (float)xPosToRead;
tempCharRecs[index].y = (float)(lineSpacing + lineToRead*(charHeight + lineSpacing));
tempCharRecs[index].height = (float)charHeight;
int charWidth = 0;
while (!COLOR_EQUAL(pixels[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*image.width + xPosToRead + charWidth], key)) charWidth++;
tempCharRecs[index].width = (float)charWidth;
index++;
xPosToRead += (charWidth + charSpacing);
}
lineToRead++;
xPosToRead = charSpacing;
}
TraceLog(LOG_DEBUG, "Font data parsed correctly from image");
// NOTE: We need to remove key color borders from image to avoid weird
// artifacts on texture scaling when using FILTER_BILINEAR or FILTER_TRILINEAR
for (int i = 0; i < image.height*image.width; i++) if (COLOR_EQUAL(pixels[i], key)) pixels[i] = BLANK;
// Create a new image with the processed color data (key color replaced by BLANK)
Image fontClear = LoadImageEx(pixels, image.width, image.height);
free(pixels); // Free pixels array memory
// Create spritefont with all data parsed from image
Font spriteFont = { 0 };
spriteFont.texture = LoadTextureFromImage(fontClear); // Convert processed image to OpenGL texture
spriteFont.charsCount = index;
UnloadImage(fontClear); // Unload processed image once converted to texture
// We got tempCharValues and tempCharsRecs populated with chars data
// Now we move temp data to sized charValues and charRecs arrays
spriteFont.chars = (CharInfo *)malloc(spriteFont.charsCount*sizeof(CharInfo));
for (int i = 0; i < spriteFont.charsCount; i++)
{
spriteFont.chars[i].value = tempCharValues[i];
spriteFont.chars[i].rec = tempCharRecs[i];
// NOTE: On image based fonts (XNA style), character offsets and xAdvance are not required (set to 0)
spriteFont.chars[i].offsetX = 0;
spriteFont.chars[i].offsetY = 0;
spriteFont.chars[i].advanceX = 0;
}
spriteFont.baseSize = (int)spriteFont.chars[0].rec.height;
TraceLog(LOG_INFO, "Image file loaded correctly as Font");
return spriteFont;
}
// Load font data for further use
// NOTE: Requires TTF font and can generate SDF data
CharInfo *LoadFontData(const char *fileName, int fontSize, int *fontChars, int charsCount, int type)
@ -837,121 +951,6 @@ bool IsEqualText(const char *text1, const char *text2)
// Module specific Functions Definition
//----------------------------------------------------------------------------------
// Load an Image font file (XNA style)
static Font LoadImageFont(Image image, Color key, int firstChar)
{
#define COLOR_EQUAL(col1, col2) ((col1.r == col2.r)&&(col1.g == col2.g)&&(col1.b == col2.b)&&(col1.a == col2.a))
int charSpacing = 0;
int lineSpacing = 0;
int x = 0;
int y = 0;
// Default number of characters supported
#define MAX_FONTCHARS 256
// We allocate a temporal arrays for chars data measures,
// once we get the actual number of chars, we copy data to a sized arrays
int tempCharValues[MAX_FONTCHARS];
Rectangle tempCharRecs[MAX_FONTCHARS];
Color *pixels = GetImageData(image);
// Parse image data to get charSpacing and lineSpacing
for (y = 0; y < image.height; y++)
{
for (x = 0; x < image.width; x++)
{
if (!COLOR_EQUAL(pixels[y*image.width + x], key)) break;
}
if (!COLOR_EQUAL(pixels[y*image.width + x], key)) break;
}
charSpacing = x;
lineSpacing = y;
int charHeight = 0;
int j = 0;
while (!COLOR_EQUAL(pixels[(lineSpacing + j)*image.width + charSpacing], key)) j++;
charHeight = j;
// Check array values to get characters: value, x, y, w, h
int index = 0;
int lineToRead = 0;
int xPosToRead = charSpacing;
// Parse image data to get rectangle sizes
while ((lineSpacing + lineToRead*(charHeight + lineSpacing)) < image.height)
{
while ((xPosToRead < image.width) &&
!COLOR_EQUAL((pixels[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*image.width + xPosToRead]), key))
{
tempCharValues[index] = firstChar + index;
tempCharRecs[index].x = (float)xPosToRead;
tempCharRecs[index].y = (float)(lineSpacing + lineToRead*(charHeight + lineSpacing));
tempCharRecs[index].height = (float)charHeight;
int charWidth = 0;
while (!COLOR_EQUAL(pixels[(lineSpacing + (charHeight+lineSpacing)*lineToRead)*image.width + xPosToRead + charWidth], key)) charWidth++;
tempCharRecs[index].width = (float)charWidth;
index++;
xPosToRead += (charWidth + charSpacing);
}
lineToRead++;
xPosToRead = charSpacing;
}
TraceLog(LOG_DEBUG, "Font data parsed correctly from image");
// NOTE: We need to remove key color borders from image to avoid weird
// artifacts on texture scaling when using FILTER_BILINEAR or FILTER_TRILINEAR
for (int i = 0; i < image.height*image.width; i++) if (COLOR_EQUAL(pixels[i], key)) pixels[i] = BLANK;
// Create a new image with the processed color data (key color replaced by BLANK)
Image fontClear = LoadImageEx(pixels, image.width, image.height);
free(pixels); // Free pixels array memory
// Create spritefont with all data parsed from image
Font spriteFont = { 0 };
spriteFont.texture = LoadTextureFromImage(fontClear); // Convert processed image to OpenGL texture
spriteFont.charsCount = index;
UnloadImage(fontClear); // Unload processed image once converted to texture
// We got tempCharValues and tempCharsRecs populated with chars data
// Now we move temp data to sized charValues and charRecs arrays
spriteFont.chars = (CharInfo *)malloc(spriteFont.charsCount*sizeof(CharInfo));
for (int i = 0; i < spriteFont.charsCount; i++)
{
spriteFont.chars[i].value = tempCharValues[i];
spriteFont.chars[i].rec = tempCharRecs[i];
// NOTE: On image based fonts (XNA style), character offsets and xAdvance are not required (set to 0)
spriteFont.chars[i].offsetX = 0;
spriteFont.chars[i].offsetY = 0;
spriteFont.chars[i].advanceX = 0;
}
spriteFont.baseSize = (int)spriteFont.chars[0].rec.height;
TraceLog(LOG_INFO, "Image file loaded correctly as Font");
return spriteFont;
}
#if defined(SUPPORT_FILEFORMAT_FNT)
// Load a BMFont file (AngelCode font file)
static Font LoadBMFont(const char *fileName)