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Add an [invert:<mode> texture modifier

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Inverts the given channels of the base image.
Mode may contain the characters "r", "g", "b", "a".
Only the channels that are mentioned in the mode string will be inverted.
This commit is contained in:
Thomas--S 2016-08-12 17:56:31 +02:00 committed by paramat
parent 6e30dd05f4
commit 1475c1b1c8
2 changed files with 50 additions and 2 deletions
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9
doc/lua_api.txt
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@ -318,6 +318,15 @@ Example:
default_sandstone.png^[opacity:127 default_sandstone.png^[opacity:127
#### `[invert:<mode>`
Inverts the given channels of the base image.
Mode may contain the characters "r", "g", "b", "a".
Only the channels that are mentioned in the mode string will be inverted.
Example:
default_apple.png^[invert:rgb
#### `[brighten` #### `[brighten`
Brightens the texture. Brightens the texture.

39
src/client/tile.cpp
View File

@ -1788,6 +1788,45 @@ bool TextureSource::generateImagePart(std::string part_of_name,
baseimg->setPixel(x, y, c); baseimg->setPixel(x, y, c);
} }
} }
/*
[invert:mode
Inverts the given channels of the base image.
Mode may contain the characters "r", "g", "b", "a".
Only the channels that are mentioned in the mode string
will be inverted.
*/
else if (str_starts_with(part_of_name, "[invert:")) {
if (baseimg == NULL) {
errorstream << "generateImagePart(): baseimg == NULL "
<< "for part_of_name=\"" << part_of_name
<< "\", cancelling." << std::endl;
return false;
}
Strfnd sf(part_of_name);
sf.next(":");
std::string mode = sf.next("");
u32 mask = 0;
if (mode.find("a") != std::string::npos)
mask |= 0xff000000UL;
if (mode.find("r") != std::string::npos)
mask |= 0x00ff0000UL;
if (mode.find("g") != std::string::npos)
mask |= 0x0000ff00UL;
if (mode.find("b") != std::string::npos)
mask |= 0x000000ffUL;
core::dimension2d<u32> dim = baseimg->getDimension();
for (u32 y = 0; y < dim.Height; y++)
for (u32 x = 0; x < dim.Width; x++)
{
video::SColor c = baseimg->getPixel(x, y);
c.color ^= mask;
baseimg->setPixel(x, y, c);
}
}
else else
{ {
errorstream << "generateImagePart(): Invalid " errorstream << "generateImagePart(): Invalid "