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Expose vips_text to create an image containing rendered text (#3252)

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brahima
2022-07-25 12:32:10 +02:00
committed by GitHub
parent 76c4c51e2a
commit ea7cf2a2ef
12 changed files with 567 additions and 2 deletions
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61
src/common.cc
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@@ -133,6 +133,39 @@ namespace sharp {
descriptor->createBackground = AttrAsVectorOfDouble(input, "createBackground");
}
}
// Create new image with text
if (HasAttr(input, "textValue")) {
descriptor->textValue = AttrAsStr(input, "textValue");
if (HasAttr(input, "textFont")) {
descriptor->textFont = AttrAsStr(input, "textFont");
}
if (HasAttr(input, "textFontfile")) {
descriptor->textFontfile = AttrAsStr(input, "textFontfile");
}
if (HasAttr(input, "textWidth")) {
descriptor->textWidth = AttrAsUint32(input, "textWidth");
}
if (HasAttr(input, "textHeight")) {
descriptor->textHeight = AttrAsUint32(input, "textHeight");
}
if (HasAttr(input, "textAlign")) {
descriptor->textAlign = static_cast<VipsAlign>(
vips_enum_from_nick(nullptr, VIPS_TYPE_ALIGN,
AttrAsStr(input, "textAlign").data()));
}
if (HasAttr(input, "textJustify")) {
descriptor->textJustify = AttrAsBool(input, "textJustify");
}
if (HasAttr(input, "textDpi")) {
descriptor->textDpi = AttrAsUint32(input, "textDpi");
}
if (HasAttr(input, "textRgba")) {
descriptor->textRgba = AttrAsBool(input, "textRgba");
}
if (HasAttr(input, "textSpacing")) {
descriptor->textSpacing = AttrAsUint32(input, "textSpacing");
}
}
// Limit input images to a given number of pixels, where pixels = width * height
descriptor->limitInputPixels = static_cast<uint64_t>(AttrAsInt64(input, "limitInputPixels"));
// Allow switch from random to sequential access
@@ -395,6 +428,34 @@ namespace sharp {
}
image = image.cast(VIPS_FORMAT_UCHAR);
imageType = ImageType::RAW;
} else if (descriptor->textValue.length() > 0) {
// Create a new image with text
vips::VOption *textOptions = VImage::option()
->set("align", descriptor->textAlign)
->set("justify", descriptor->textJustify)
->set("rgba", descriptor->textRgba)
->set("spacing", descriptor->textSpacing)
->set("autofit_dpi", &descriptor->textAutofitDpi);
if (descriptor->textWidth > 0) {
textOptions->set("width", descriptor->textWidth);
}
// Ignore dpi if height is set
if (descriptor->textWidth > 0 && descriptor->textHeight > 0) {
textOptions->set("height", descriptor->textHeight);
} else if (descriptor->textDpi > 0) {
textOptions->set("dpi", descriptor->textDpi);
}
if (descriptor->textFont.length() > 0) {
textOptions->set("font", const_cast<char*>(descriptor->textFont.data()));
}
if (descriptor->textFontfile.length() > 0) {
textOptions->set("fontfile", const_cast<char*>(descriptor->textFontfile.data()));
}
image = VImage::text(const_cast<char *>(descriptor->textValue.data()), textOptions);
if (!descriptor->textRgba) {
image = image.copy(VImage::option()->set("interpretation", VIPS_INTERPRETATION_B_W));
}
imageType = ImageType::RAW;
} else {
// From filesystem
imageType = DetermineImageType(descriptor->file.data());