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Rangi
996469ee28
Some test cases need CRLF line endings checked out even on Unix. Also some source files had inadvertently contained CR bytes.
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
// SPDX-License-Identifier: MIT
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#include "gfx/palette.hpp"
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#include <algorithm>
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#include <stdint.h>
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#include "helpers.hpp"
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#include "gfx/main.hpp"
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#include "gfx/rgba.hpp"
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void Palette::addColor(uint16_t color) {
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for (size_t i = 0; true; ++i) {
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assume(i < colors.size()); // The packing should guarantee this
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if (colors[i] == color) { // The color is already present
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break;
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} else if (colors[i] == UINT16_MAX) { // Empty slot
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colors[i] = color;
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break;
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}
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}
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}
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// Returns the ID of the color in the palette, or `size()` if the color is not in
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uint8_t Palette::indexOf(uint16_t color) const {
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return color == Rgba::transparent
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? 0
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: std::find(begin(), colors.end(), color) - begin() + options.hasTransparentPixels;
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}
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auto Palette::begin() -> decltype(colors)::iterator {
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// Skip the first slot if reserved for transparency
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return colors.begin() + options.hasTransparentPixels;
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}
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auto Palette::end() -> decltype(colors)::iterator {
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// Return an iterator pointing past the last non-empty element.
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// Since the palette may contain gaps, we must scan from the end.
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return std::find_if(RRANGE(colors), [](uint16_t c) { return c != UINT16_MAX; }).base();
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}
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auto Palette::begin() const -> decltype(colors)::const_iterator {
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// Same as the non-const begin().
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return colors.begin() + options.hasTransparentPixels;
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}
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auto Palette::end() const -> decltype(colors)::const_iterator {
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// Same as the non-const end().
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return std::find_if(RRANGE(colors), [](uint16_t c) { return c != UINT16_MAX; }).base();
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}
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uint8_t Palette::size() const {
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return end() - colors.begin();
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}
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