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Add multiply texture modifier
Allows colorizing of textures using a color multiplication method.
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@ -419,6 +419,13 @@ the word "`alpha`", then each texture pixel will contain the RGB of
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`<color>` and the alpha of `<color>` multiplied by the alpha of the
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texture pixel.
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#### `[multiply:<color>`
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Multiplies texture colors with the given color.
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`<color>` is specified as a `ColorString`.
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Result is more like what you'd expect if you put a color on top of another
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color. Meaning white surfaces get a lot of your new color while black parts don't
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change very much.
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Sounds
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------
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Only Ogg Vorbis files are supported.
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@ -555,7 +555,11 @@ static void blit_with_alpha_overlay(video::IImage *src, video::IImage *dst,
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// color alpha with the destination alpha.
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// Otherwise, any pixels that are not fully transparent get the color alpha.
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static void apply_colorize(video::IImage *dst, v2u32 dst_pos, v2u32 size,
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video::SColor color, int ratio, bool keep_alpha);
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const video::SColor &color, int ratio, bool keep_alpha);
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// paint a texture using the given color
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static void apply_multiplication(video::IImage *dst, v2u32 dst_pos, v2u32 size,
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const video::SColor &color);
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// Apply a mask to an image
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static void apply_mask(video::IImage *mask, video::IImage *dst,
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@ -1656,6 +1660,30 @@ bool TextureSource::generateImagePart(std::string part_of_name,
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<< filename << "\".";
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}
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}
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/*
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[multiply:color
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multiplys a given color to any pixel of an image
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color = color as ColorString
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*/
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else if (str_starts_with(part_of_name, "[multiply:")) {
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Strfnd sf(part_of_name);
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sf.next(":");
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std::string color_str = sf.next(":");
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if (baseimg == NULL) {
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errorstream << "generateImagePart(): baseimg != NULL "
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<< "for part_of_name=\"" << part_of_name
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<< "\", cancelling." << std::endl;
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return false;
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}
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video::SColor color;
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if (!parseColorString(color_str, color, false))
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return false;
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apply_multiplication(baseimg, v2u32(0, 0), baseimg->getDimension(), color);
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}
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/*
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[colorize:color
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Overlays image with given color
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@ -1960,7 +1988,7 @@ static void blit_with_interpolate_overlay(video::IImage *src, video::IImage *dst
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Apply color to destination
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*/
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static void apply_colorize(video::IImage *dst, v2u32 dst_pos, v2u32 size,
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video::SColor color, int ratio, bool keep_alpha)
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const video::SColor &color, int ratio, bool keep_alpha)
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{
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u32 alpha = color.getAlpha();
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video::SColor dst_c;
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@ -1994,6 +2022,27 @@ static void apply_colorize(video::IImage *dst, v2u32 dst_pos, v2u32 size,
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}
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}
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/*
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Apply color to destination
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*/
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static void apply_multiplication(video::IImage *dst, v2u32 dst_pos, v2u32 size,
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const video::SColor &color)
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{
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video::SColor dst_c;
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for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++)
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for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) {
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dst_c = dst->getPixel(x, y);
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dst_c.set(
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dst_c.getAlpha(),
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(dst_c.getRed() * color.getRed()) / 255,
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(dst_c.getGreen() * color.getGreen()) / 255,
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(dst_c.getBlue() * color.getBlue()) / 255
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);
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dst->setPixel(x, y, dst_c);
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}
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}
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/*
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Apply mask to destination
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*/
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