diff options
Diffstat (limited to 'plugingui/painter.cc')
| -rw-r--r-- | plugingui/painter.cc | 43 |
1 files changed, 36 insertions, 7 deletions
diff --git a/plugingui/painter.cc b/plugingui/painter.cc index bad5318..ba1e621 100644 --- a/plugingui/painter.cc +++ b/plugingui/painter.cc @@ -461,7 +461,7 @@ void Painter::drawRestrictedImage(int x0, int y0, } void Painter::drawImageStretched(int x0, int y0, const Drawable& image, - int width, int height) + int width, int height, Filter filter) { float fw = image.width(); float fh = image.height(); @@ -482,15 +482,44 @@ void Painter::drawImageStretched(int x0, int y0, const Drawable& image, return; } - for(int y = -1 * std::min(0, y0); y < height; ++y) + switch(filter) { - for(int x = -1 * std::min(0, x0); x < width; ++x) + case Filter::Nearest: + for(int y = -1 * std::min(0, y0); y < height; ++y) { - int lx = ((float)x / (float)width) * fw; - int ly = ((float)y / (float)height) * fh; - auto& c = image.getPixel(lx, ly); - pixbuf.addPixel(x0 + x, y0 + y, c); + 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); + pixbuf.addPixel(x0 + x, y0 + y, c); + } + } + 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; + pixbuf.addPixel(x0 + x, y0 + y, c); + } } + break; } } |