diff options
Diffstat (limited to 'plugingui/painter.cc')
| -rw-r--r-- | plugingui/painter.cc | 73 |
1 files changed, 72 insertions, 1 deletions
diff --git a/plugingui/painter.cc b/plugingui/painter.cc index ba1e621..cc7c66e 100644 --- a/plugingui/painter.cc +++ b/plugingui/painter.cc @@ -452,7 +452,7 @@ void Painter::drawRestrictedImage(int x0, int y0, assert(x0 + x < pixbuf.width); assert(y0 + y < pixbuf.height); - if(c == restriction_colour) + if(c == restriction_colour && c.alpha() > 0) { pixbuf.setPixel(x0 + x, y0 + y, c); } @@ -460,6 +460,77 @@ void Painter::drawRestrictedImage(int x0, int y0, } } +void Painter::drawRestrictedImageStretched(int x0, int y0, + const Colour& restriction_colour, + const Drawable& image, + int width, int height, Filter filter) +{ + float fw = image.width(); + float fh = image.height(); + + // Make sure we don't try to draw outside the pixbuf. + if(width > (int)(pixbuf.width - x0)) + { + width = pixbuf.width - x0; + } + + if(height > (int)(pixbuf.height - y0)) + { + height = pixbuf.height - y0; + } + + if((width < 1) || (height < 1)) + { + return; + } + + switch(filter) + { + case Filter::Nearest: + for(int y = -1 * std::min(0, y0); y < height; ++y) + { + for(int x = -1 * std::min(0, x0); x < width; ++x) + { + int lx = ((float)x / (float)width) * fw; + int ly = ((float)y / (float)height) * fh; + auto& c = image.getPixel(lx, ly); + if(c == restriction_colour && c.alpha() > 0) + { + pixbuf.addPixel(x0 + x, y0 + y, restriction_colour); + } + } + } + break; + + case Filter::Linear: + for(int y = -1 * std::min(0, y0); y < height; ++y) + { + for(int x = -1 * std::min(0, x0); x < width; ++x) + { + float lx = ((float)x / (float)width) * fw; + float ly = ((float)y / (float)height) * fh; + float px = lx - std::floor(lx); + float py = ly - std::floor(ly); + //printf("px: %f, py: %f\n", px, py); + // 1,1 2,1 + // 1,2 2,2 + auto c11 = image.getPixel(std::floor(lx), std::floor(ly)); + auto c12 = image.getPixel(std::floor(lx), std::ceil(ly)); + auto c21 = image.getPixel(std::ceil(lx), std::floor(ly)); + auto c22 = image.getPixel(std::ceil(lx), std::ceil(ly)); + auto c1 = c11 * (1 - px) + c21 * px; + auto c2 = c12 * (1 - px) + c22 * px; + auto c = c1 * (1 - py) + c2 * py; + if(c == restriction_colour && c.alpha() > 0) + { + pixbuf.addPixel(x0 + x, y0 + y, restriction_colour); + } + } + } + break; + } +} + void Painter::drawImageStretched(int x0, int y0, const Drawable& image, int width, int height, Filter filter) { |