Added security check in case init fails #1135
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raysan5
parent
2344941974
commit
4af4483f5f
137
src/text.c
137
src/text.c
@ -504,87 +504,90 @@ CharInfo *LoadFontData(const char *fileName, int fontSize, int *fontChars, int c
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if (fileData != NULL)
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{
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// Init font for data reading
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stbtt_fontinfo fontInfo;
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if (!stbtt_InitFont(&fontInfo, fileData, 0)) TRACELOG(LOG_WARNING, "Failed to init font!");
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// Calculate font scale factor
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float scaleFactor = stbtt_ScaleForPixelHeight(&fontInfo, (float)fontSize);
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// Calculate font basic metrics
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// NOTE: ascent is equivalent to font baseline
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int ascent, descent, lineGap;
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stbtt_GetFontVMetrics(&fontInfo, &ascent, &descent, &lineGap);
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// In case no chars count provided, default to 95
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charsCount = (charsCount > 0)? charsCount : 95;
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// Fill fontChars in case not provided externally
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// NOTE: By default we fill charsCount consecutevely, starting at 32 (Space)
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int genFontChars = false;
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if (fontChars == NULL)
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stbtt_fontinfo fontInfo = { 0 };
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if (stbtt_InitFont(&fontInfo, fileData, 0)) // Init font for data reading
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{
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fontChars = (int *)RL_MALLOC(charsCount*sizeof(int));
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for (int i = 0; i < charsCount; i++) fontChars[i] = i + 32;
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genFontChars = true;
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}
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// Calculate font scale factor
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float scaleFactor = stbtt_ScaleForPixelHeight(&fontInfo, (float)fontSize);
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chars = (CharInfo *)RL_MALLOC(charsCount*sizeof(CharInfo));
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// Calculate font basic metrics
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// NOTE: ascent is equivalent to font baseline
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int ascent, descent, lineGap;
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stbtt_GetFontVMetrics(&fontInfo, &ascent, &descent, &lineGap);
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// NOTE: Using simple packaging, one char after another
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for (int i = 0; i < charsCount; i++)
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{
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int chw = 0, chh = 0; // Character width and height (on generation)
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int ch = fontChars[i]; // Character value to get info for
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chars[i].value = ch;
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// In case no chars count provided, default to 95
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charsCount = (charsCount > 0)? charsCount : 95;
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// Render a unicode codepoint to a bitmap
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// stbtt_GetCodepointBitmap() -- allocates and returns a bitmap
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// stbtt_GetCodepointBitmapBox() -- how big the bitmap must be
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// stbtt_MakeCodepointBitmap() -- renders into bitmap you provide
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// Fill fontChars in case not provided externally
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// NOTE: By default we fill charsCount consecutevely, starting at 32 (Space)
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if (type != FONT_SDF) chars[i].image.data = stbtt_GetCodepointBitmap(&fontInfo, scaleFactor, scaleFactor, ch, &chw, &chh, &chars[i].offsetX, &chars[i].offsetY);
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else if (ch != 32) chars[i].image.data = stbtt_GetCodepointSDF(&fontInfo, scaleFactor, ch, SDF_CHAR_PADDING, SDF_ON_EDGE_VALUE, SDF_PIXEL_DIST_SCALE, &chw, &chh, &chars[i].offsetX, &chars[i].offsetY);
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else chars[i].image.data = NULL;
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stbtt_GetCodepointHMetrics(&fontInfo, ch, &chars[i].advanceX, NULL);
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chars[i].advanceX = (int)((float)chars[i].advanceX*scaleFactor);
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// Load characters images
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chars[i].image.width = chw;
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chars[i].image.height = chh;
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chars[i].image.mipmaps = 1;
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chars[i].image.format = UNCOMPRESSED_GRAYSCALE;
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chars[i].offsetY += (int)((float)ascent*scaleFactor);
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// NOTE: We create an empty image for space character, it could be further required for atlas packing
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if (ch == 32)
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if (fontChars == NULL)
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{
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chars[i].image = GenImageColor(chars[i].advanceX, fontSize, BLANK);
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ImageFormat(&chars[i].image, UNCOMPRESSED_GRAYSCALE);
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fontChars = (int *)RL_MALLOC(charsCount*sizeof(int));
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for (int i = 0; i < charsCount; i++) fontChars[i] = i + 32;
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genFontChars = true;
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}
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if (type == FONT_BITMAP)
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chars = (CharInfo *)RL_MALLOC(charsCount*sizeof(CharInfo));
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// NOTE: Using simple packaging, one char after another
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for (int i = 0; i < charsCount; i++)
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{
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// Aliased bitmap (black & white) font generation, avoiding anti-aliasing
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// NOTE: For optimum results, bitmap font should be generated at base pixel size
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for (int p = 0; p < chw*chh; p++)
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int chw = 0, chh = 0; // Character width and height (on generation)
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int ch = fontChars[i]; // Character value to get info for
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chars[i].value = ch;
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// Render a unicode codepoint to a bitmap
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// stbtt_GetCodepointBitmap() -- allocates and returns a bitmap
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// stbtt_GetCodepointBitmapBox() -- how big the bitmap must be
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// stbtt_MakeCodepointBitmap() -- renders into bitmap you provide
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if (type != FONT_SDF) chars[i].image.data = stbtt_GetCodepointBitmap(&fontInfo, scaleFactor, scaleFactor, ch, &chw, &chh, &chars[i].offsetX, &chars[i].offsetY);
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else if (ch != 32) chars[i].image.data = stbtt_GetCodepointSDF(&fontInfo, scaleFactor, ch, SDF_CHAR_PADDING, SDF_ON_EDGE_VALUE, SDF_PIXEL_DIST_SCALE, &chw, &chh, &chars[i].offsetX, &chars[i].offsetY);
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else chars[i].image.data = NULL;
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stbtt_GetCodepointHMetrics(&fontInfo, ch, &chars[i].advanceX, NULL);
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chars[i].advanceX = (int)((float)chars[i].advanceX*scaleFactor);
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// Load characters images
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chars[i].image.width = chw;
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chars[i].image.height = chh;
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chars[i].image.mipmaps = 1;
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chars[i].image.format = UNCOMPRESSED_GRAYSCALE;
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chars[i].offsetY += (int)((float)ascent*scaleFactor);
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// NOTE: We create an empty image for space character, it could be further required for atlas packing
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if (ch == 32)
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{
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if (((unsigned char *)chars[i].image.data)[p] < BITMAP_ALPHA_THRESHOLD) ((unsigned char *)chars[i].image.data)[p] = 0;
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else ((unsigned char *)chars[i].image.data)[p] = 255;
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chars[i].image = GenImageColor(chars[i].advanceX, fontSize, BLANK);
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ImageFormat(&chars[i].image, UNCOMPRESSED_GRAYSCALE);
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}
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if (type == FONT_BITMAP)
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{
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// Aliased bitmap (black & white) font generation, avoiding anti-aliasing
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// NOTE: For optimum results, bitmap font should be generated at base pixel size
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for (int p = 0; p < chw*chh; p++)
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{
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if (((unsigned char *)chars[i].image.data)[p] < BITMAP_ALPHA_THRESHOLD) ((unsigned char *)chars[i].image.data)[p] = 0;
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else ((unsigned char *)chars[i].image.data)[p] = 255;
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}
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}
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// Get bounding box for character (may be offset to account for chars that dip above or below the line)
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/*
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int chX1, chY1, chX2, chY2;
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stbtt_GetCodepointBitmapBox(&fontInfo, ch, scaleFactor, scaleFactor, &chX1, &chY1, &chX2, &chY2);
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TRACELOGD("Character box measures: %i, %i, %i, %i", chX1, chY1, chX2 - chX1, chY2 - chY1);
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TRACELOGD("Character offsetY: %i", (int)((float)ascent*scaleFactor) + chY1);
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*/
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}
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// Get bounding box for character (may be offset to account for chars that dip above or below the line)
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/*
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int chX1, chY1, chX2, chY2;
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stbtt_GetCodepointBitmapBox(&fontInfo, ch, scaleFactor, scaleFactor, &chX1, &chY1, &chX2, &chY2);
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TRACELOGD("Character box measures: %i, %i, %i, %i", chX1, chY1, chX2 - chX1, chY2 - chY1);
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TRACELOGD("Character offsetY: %i", (int)((float)ascent*scaleFactor) + chY1);
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*/
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}
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else TRACELOG(LOG_WARNING, "Failed to init font!");
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RL_FREE(fileData);
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if (genFontChars) RL_FREE(fontChars);
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