32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
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#include "RenderHelpers.hpp"
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#include <cstdlib>
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/// @brief Checks if the dimensions of two ImVec2 vectors have changed significantly.
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/// @param ref_rect The reference ImVec2 vector.
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/// @param new_rect The new ImVec2 vector to compare against.
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/// @return True if the absolute difference between the y-coordinates is greater than 5 or the x-coordinates are
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/// different; otherwise, false.
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bool pixelarium::render::dim_changed_p(const ImVec2& ref_rect, const ImVec2& new_rect)
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{
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if (std::abs(ref_rect.y - new_rect.y) > 5 || std::abs(ref_rect.x - new_rect.x))
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{
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return true;
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}
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return false;
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}
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/// @brief Calculates dimensions to maintain aspect ratio.
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/// @param img The input image.
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/// @param curr_dim The current dimensions.
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/// @return The calculated dimensions maintaining aspect ratio.
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ImVec2 pixelarium::render::aspect_const_dimensions(const ImVec2& raw_dim, const ImVec2& curr_dim)
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{
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const auto w_fact = (curr_dim.x / raw_dim.x);
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const auto h_fact = (curr_dim.y / raw_dim.y);
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const auto fact = w_fact < h_fact ? w_fact : h_fact;
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return ImVec2(raw_dim.x * fact, raw_dim.y * fact);
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}
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