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@@ -537,6 +537,10 @@ static void blit_with_alpha(video::IImage *src, video::IImage *dst,
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static void blit_with_alpha_overlay(video::IImage *src, video::IImage *dst,
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v2s32 src_pos, v2s32 dst_pos, v2u32 size);
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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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+ v2s32 mask_pos, v2s32 dst_pos, v2u32 size);
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+
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// Draw or overlay a crack
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static void draw_crack(video::IImage *crack, video::IImage *dst,
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bool use_overlay, s32 frame_count, s32 progression,
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@@ -1557,6 +1561,31 @@ bool TextureSource::generateImagePart(std::string part_of_name,
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baseimg->drop();
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baseimg = img;
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}
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+ /*
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+ [mask:filename
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+ Applies a mask to an image
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+ */
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+ else if(part_of_name.substr(0,6) == "[mask:")
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+ {
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+ if (baseimg == NULL) {
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+ errorstream << "generateImage(): 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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+ Strfnd sf(part_of_name);
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+ sf.next(":");
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+ std::string filename = sf.next(":");
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+
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+ video::IImage *img = m_sourcecache.getOrLoad(filename, m_device);
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+ if (img) {
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+ apply_mask(img, baseimg, v2s32(0, 0), v2s32(0, 0),
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+ img->getDimension());
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+ } else {
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+ errorstream << "generateImage(): Failed to load \""
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+ << filename << "\".";
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+ }
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+ }
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else
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{
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errorstream<<"generateImagePart(): Invalid "
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@@ -1615,6 +1644,26 @@ static void blit_with_alpha_overlay(video::IImage *src, video::IImage *dst,
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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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+static void apply_mask(video::IImage *mask, video::IImage *dst,
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+ v2s32 mask_pos, v2s32 dst_pos, v2u32 size)
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+{
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+ for(u32 y0 = 0; y0 < size.Y; y0++) {
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+ for(u32 x0 = 0; x0 < size.X; x0++) {
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+ s32 mask_x = x0 + mask_pos.X;
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+ s32 mask_y = y0 + mask_pos.Y;
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+ s32 dst_x = x0 + dst_pos.X;
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+ s32 dst_y = y0 + dst_pos.Y;
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+ video::SColor mask_c = mask->getPixel(mask_x, mask_y);
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+ video::SColor dst_c = dst->getPixel(dst_x, dst_y);
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+ dst_c.color &= mask_c.color;
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+ dst->setPixel(dst_x, dst_y, dst_c);
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+ }
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+ }
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+}
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+
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static void draw_crack(video::IImage *crack, video::IImage *dst,
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bool use_overlay, s32 frame_count, s32 progression,
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video::IVideoDriver *driver)
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