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BM Font Extender (#3536) 

* loadbmfont

* bmfontextender

* bm font

* Modify LoadBM Font

* Delete loadbmfontex.diff

* REVIEWED: `LoadBMFont()` PR

* Update rtext.c

* Update rtext.c

---------

Co-authored-by: Dongkun Lee <hope81dklee@outlook.com>
Co-authored-by: Ray <raysan5@gmail.com>
This commit is contained in:
Dongkun Lee 2023-12-16 02:32:01 +09:00 committed by GitHub
parent e001f7e75e
commit 9de79861ea
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 70 additions and 52 deletions
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122
src/rtext.c
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@ -2051,7 +2051,8 @@ static int GetLine(const char *origin, char *buffer, int maxLength)
// REQUIRES: strstr(), sscanf(), strrchr(), memcpy()
static Font LoadBMFont(const char *fileName)
{
#define MAX_BUFFER_SIZE 256
#define MAX_BUFFER_SIZE 256
#define MAX_FONT_IMAGE_PAGES 8
Font font = { 0 };
@ -2063,7 +2064,8 @@ static Font LoadBMFont(const char *fileName)
int imWidth = 0;
int imHeight = 0;
char imFileName[129] = { 0 };
int pageCount = 1;
char imFileName[MAX_FONT_IMAGE_PAGES][129] = { 0 };
int base = 0; // Useless data
int readBytes = 0; // Data bytes read
@ -2082,17 +2084,26 @@ static Font LoadBMFont(const char *fileName)
// Read line data
readBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
searchPoint = strstr(buffer, "lineHeight");
readVars = sscanf(searchPoint, "lineHeight=%i base=%i scaleW=%i scaleH=%i", &fontSize, &base, &imWidth, &imHeight);
readVars = sscanf(searchPoint, "lineHeight=%i base=%i scaleW=%i scaleH=%i pages=%i", &fontSize, &base, &imWidth, &imHeight, &pageCount);
fileTextPtr += (readBytes + 1);
if (readVars < 4) { UnloadFileText(fileText); return font; } // Some data not available, file malformed
if (pageCount > MAX_FONT_IMAGE_PAGES)
{
TRACELOG(LOG_WARNING, "FONT: [%s] Font defines more pages than supported: %i/%i", fileName, pageCount, MAX_FONT_IMAGE_PAGES);
pageCount = MAX_FONT_IMAGE_PAGES;
}
readBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
searchPoint = strstr(buffer, "file");
readVars = sscanf(searchPoint, "file=\"%128[^\"]\"", imFileName);
fileTextPtr += (readBytes + 1);
for (int i = 0; i < pageCount; i++)
{
readBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
searchPoint = strstr(buffer, "file");
readVars = sscanf(searchPoint, "file=\"%128[^\"]\"", imFileName[i]);
fileTextPtr += (readBytes + 1);
if (readVars < 1) { UnloadFileText(fileText); return font; } // No fileName read
if (readVars < 1) { UnloadFileText(fileText); return font; } // No fileName read
}
readBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
searchPoint = strstr(buffer, "count");
@ -2101,50 +2112,56 @@ static Font LoadBMFont(const char *fileName)
if (readVars < 1) { UnloadFileText(fileText); return font; } // No glyphCount read
// Compose correct path using route of .fnt file (fileName) and imFileName
char *imPath = NULL;
char *lastSlash = NULL;
// Load all required images for further compose
Image *imFonts = (Image *)RL_CALLOC(pageCount, sizeof(Image)); // Font atlases, multiple images
lastSlash = strrchr(fileName, '/');
if (lastSlash == NULL) lastSlash = strrchr(fileName, '\\');
if (lastSlash != NULL)
for (int i = 0; i < pageCount; i++)
{
// NOTE: We need some extra space to avoid memory corruption on next allocations!
imPath = (char *)RL_CALLOC(TextLength(fileName) - TextLength(lastSlash) + TextLength(imFileName) + 4, 1);
memcpy(imPath, fileName, TextLength(fileName) - TextLength(lastSlash) + 1);
memcpy(imPath + TextLength(fileName) - TextLength(lastSlash) + 1, imFileName, TextLength(imFileName));
}
else imPath = imFileName;
imFonts[i] = LoadImage(TextFormat("%s/%s", GetDirectoryPath(fileName), imFileName[i]));
TRACELOGD(" > Image loading path: %s", imPath);
Image imFont = LoadImage(imPath);
if (imFont.format == PIXELFORMAT_UNCOMPRESSED_GRAYSCALE)
{
// Convert image to GRAYSCALE + ALPHA, using the mask as the alpha channel
Image imFontAlpha = {
.data = RL_CALLOC(imFont.width*imFont.height, 2),
.width = imFont.width,
.height = imFont.height,
.mipmaps = 1,
.format = PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA
};
for (int p = 0, i = 0; p < (imFont.width*imFont.height*2); p += 2, i++)
if (imFonts[i].format == PIXELFORMAT_UNCOMPRESSED_GRAYSCALE)
{
((unsigned char *)(imFontAlpha.data))[p] = 0xff;
((unsigned char *)(imFontAlpha.data))[p + 1] = ((unsigned char *)imFont.data)[i];
}
// Convert image to GRAYSCALE + ALPHA, using the mask as the alpha channel
Image imFontAlpha = {
.data = RL_CALLOC(imFonts[i].width*imFonts[i].height, 2),
.width = imFonts[i].width,
.height = imFonts[i].height,
.mipmaps = 1,
.format = PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA
};
UnloadImage(imFont);
imFont = imFontAlpha;
for (int p = 0, pi = 0; p < (imFonts[i].width*imFonts[i].height*2); p += 2, pi++)
{
((unsigned char *)(imFontAlpha.data))[p] = 0xff;
((unsigned char *)(imFontAlpha.data))[p + 1] = ((unsigned char *)imFonts[i].data)[pi];
}
UnloadImage(imFonts[i]);
imFonts[i] = imFontAlpha;
}
}
font.texture = LoadTextureFromImage(imFont);
Image fullFont = imFonts[0];
for (int i = 1; i < pageCount; i++) UnloadImage(imFonts[i]);
if (lastSlash != NULL) RL_FREE(imPath);
// If multiple atlas, then merge atlas
// NOTE: WARNING: This process could be really slow!
if (pageCount > 1)
{
// Resize font atlas to draw additional images
ImageResizeCanvas(&fullFont, imWidth, imHeight*pageCount, 0, 0, BLACK);
for (int i = 1; i < pageCount; i++)
{
Rectangle srcRec = { 0.0f, 0.0f, (float)imWidth, (float)imHeight };
Rectangle destRec = { 0.0f, (float)imHeight*(float)i, (float)imWidth, (float)imHeight };
ImageDraw(&fullFont, imFonts[i], srcRec, destRec, WHITE);
}
}
RL_FREE(imFonts);
font.texture = LoadTextureFromImage(fullFont);
// Fill font characters info data
font.baseSize = fontSize;
@ -2153,19 +2170,19 @@ static Font LoadBMFont(const char *fileName)
font.glyphs = (GlyphInfo *)RL_MALLOC(glyphCount*sizeof(GlyphInfo));
font.recs = (Rectangle *)RL_MALLOC(glyphCount*sizeof(Rectangle));
int charId, charX, charY, charWidth, charHeight, charOffsetX, charOffsetY, charAdvanceX;
int charId, charX, charY, charWidth, charHeight, charOffsetX, charOffsetY, charAdvanceX, pageID;
for (int i = 0; i < glyphCount; i++)
{
readBytes = GetLine(fileTextPtr, buffer, MAX_BUFFER_SIZE);
readVars = sscanf(buffer, "char id=%i x=%i y=%i width=%i height=%i xoffset=%i yoffset=%i xadvance=%i",
&charId, &charX, &charY, &charWidth, &charHeight, &charOffsetX, &charOffsetY, &charAdvanceX);
readVars = sscanf(buffer, "char id=%i x=%i y=%i width=%i height=%i xoffset=%i yoffset=%i xadvance=%i page=%i",
&charId, &charX, &charY, &charWidth, &charHeight, &charOffsetX, &charOffsetY, &charAdvanceX, &pageID);
fileTextPtr += (readBytes + 1);
if (readVars == 8) // Make sure all char data has been properly read
if (readVars == 9) // Make sure all char data has been properly read
{
// Get character rectangle in the font atlas texture
font.recs[i] = (Rectangle){ (float)charX, (float)charY, (float)charWidth, (float)charHeight };
font.recs[i] = (Rectangle){ (float)charX, (float)charY + (float)imHeight*pageID, (float)charWidth, (float)charHeight };
// Save data properly in sprite font
font.glyphs[i].value = charId;
@ -2173,13 +2190,13 @@ static Font LoadBMFont(const char *fileName)
font.glyphs[i].offsetY = charOffsetY;
font.glyphs[i].advanceX = charAdvanceX;
// Fill character image data from imFont data
font.glyphs[i].image = ImageFromImage(imFont, font.recs[i]);
// Fill character image data from full font data
font.glyphs[i].image = ImageFromImage(fullFont, font.recs[i]);
}
else TRACELOG(LOG_WARNING, "FONT: [%s] Some characters data not correctly provided", fileName);
}
UnloadImage(imFont);
UnloadImage(fullFont);
UnloadFileText(fileText);
if (font.texture.id == 0)
@ -2192,6 +2209,7 @@ static Font LoadBMFont(const char *fileName)
return font;
}
#endif
#endif // SUPPORT_MODULE_RTEXT