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44 lines
1.2 KiB
44 lines
1.2 KiB
#pragma once |
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#include "engine/render/blit_impl.hpp" |
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namespace devilution { |
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[[nodiscard]] constexpr bool IsClxOpaque(uint8_t control) |
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{ |
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constexpr uint8_t ClxOpaqueMin = 0x80; |
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return control >= ClxOpaqueMin; |
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} |
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[[nodiscard]] constexpr uint8_t GetClxOpaquePixelsWidth(uint8_t control) |
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{ |
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return -static_cast<std::int8_t>(control); |
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} |
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[[nodiscard]] constexpr bool IsClxOpaqueFill(uint8_t control) |
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{ |
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constexpr uint8_t ClxFillMax = 0xBE; |
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return control <= ClxFillMax; |
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} |
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[[nodiscard]] constexpr uint8_t GetClxOpaqueFillWidth(uint8_t control) |
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{ |
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constexpr uint8_t ClxFillEnd = 0xBF; |
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return static_cast<int_fast16_t>(ClxFillEnd - control); |
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} |
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[[nodiscard]] constexpr BlitCommand ClxGetBlitCommand(const uint8_t *src) |
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{ |
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const uint8_t control = *src++; |
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if (!IsClxOpaque(control)) |
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return BlitCommand { BlitType::Transparent, src, control, 0 }; |
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if (IsClxOpaqueFill(control)) { |
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const uint8_t width = GetClxOpaqueFillWidth(control); |
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const uint8_t color = *src++; |
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return BlitCommand { BlitType::Fill, src, width, color }; |
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} |
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const uint8_t width = GetClxOpaquePixelsWidth(control); |
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return BlitCommand { BlitType::Pixels, src + width, width, 0 }; |
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} |
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} // namespace devilution
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