61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
#include "./image_loader.hpp"
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#include <cassert>
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#include <cstdint>
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#include "./image_scaler.hpp"
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ImageLoaderI::ImageResult ImageLoaderI::ImageResult::crop(int32_t c_x, int32_t c_y, int32_t c_w, int32_t c_h) const {
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if (
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c_x < 0 || c_y < 0 || c_w < 1 || c_h < 1 ||
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int64_t(c_x) + int64_t(c_w) > int64_t(width) || int64_t(c_y) + int64_t(c_h) > int64_t(height)
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) {
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// unreachable
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assert(false && "invalid image crop");
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return *this;
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}
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ImageLoaderI::ImageResult new_image;
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new_image.width = c_w;
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new_image.height = c_h;
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new_image.file_ext = file_ext;
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for (const auto& input_frame : frames) {
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auto& new_frame = new_image.frames.emplace_back();
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new_frame.ms = input_frame.ms;
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// TODO: improve this, this is inefficent
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for (int64_t y = c_y; y < c_y + c_h; y++) {
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for (int64_t x = c_x; x < c_x + c_w; x++) {
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new_frame.data.push_back(input_frame.data.at(y*width*4+x*4+0));
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new_frame.data.push_back(input_frame.data.at(y*width*4+x*4+1));
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new_frame.data.push_back(input_frame.data.at(y*width*4+x*4+2));
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new_frame.data.push_back(input_frame.data.at(y*width*4+x*4+3));
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}
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}
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}
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return new_image;
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}
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ImageLoaderI::ImageResult ImageLoaderI::ImageResult::scale(int32_t w, int32_t h) const {
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assert(w > 0);
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assert(h > 0);
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ImageLoaderI::ImageResult new_image;
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new_image.width = w;
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new_image.height = h;
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new_image.file_ext = file_ext;
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for (const auto& input_frame : frames) {
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auto& new_frame = new_image.frames.emplace_back();
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new_frame.ms = input_frame.ms;
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new_frame.data.resize(w*h*4);
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image_scale(new_frame.data.data(), w, h, const_cast<uint8_t*>(input_frame.data.data()), width, height);
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}
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return new_image;
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}
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