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common: Make use of [[nodiscard]] where applicable

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Now that clang-format makes [[nodiscard]] attributes format sensibly, we
can apply them to several functions within the common library to allow
the compiler to complain about any misuses of the functions.
This commit is contained in:
Lioncash 2020-08-14 09:38:45 -04:00
parent 2b601e8636
commit df72480395
34 changed files with 343 additions and 358 deletions
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34
src/common/color.h
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@ -13,42 +13,42 @@
namespace Color {
/// Convert a 1-bit color component to 8 bit
constexpr u8 Convert1To8(u8 value) {
[[nodiscard]] constexpr u8 Convert1To8(u8 value) {
return value * 255;
}
/// Convert a 4-bit color component to 8 bit
constexpr u8 Convert4To8(u8 value) {
[[nodiscard]] constexpr u8 Convert4To8(u8 value) {
return (value << 4) | value;
}
/// Convert a 5-bit color component to 8 bit
constexpr u8 Convert5To8(u8 value) {
[[nodiscard]] constexpr u8 Convert5To8(u8 value) {
return (value << 3) | (value >> 2);
}
/// Convert a 6-bit color component to 8 bit
constexpr u8 Convert6To8(u8 value) {
[[nodiscard]] constexpr u8 Convert6To8(u8 value) {
return (value << 2) | (value >> 4);
}
/// Convert a 8-bit color component to 1 bit
constexpr u8 Convert8To1(u8 value) {
[[nodiscard]] constexpr u8 Convert8To1(u8 value) {
return value >> 7;
}
/// Convert a 8-bit color component to 4 bit
constexpr u8 Convert8To4(u8 value) {
[[nodiscard]] constexpr u8 Convert8To4(u8 value) {
return value >> 4;
}
/// Convert a 8-bit color component to 5 bit
constexpr u8 Convert8To5(u8 value) {
[[nodiscard]] constexpr u8 Convert8To5(u8 value) {
return value >> 3;
}
/// Convert a 8-bit color component to 6 bit
constexpr u8 Convert8To6(u8 value) {
[[nodiscard]] constexpr u8 Convert8To6(u8 value) {
return value >> 2;
}
@ -57,7 +57,7 @@ constexpr u8 Convert8To6(u8 value) {
* @param bytes Pointer to encoded source color
* @return Result color decoded as Common::Vec4<u8>
*/
inline Common::Vec4<u8> DecodeRGBA8(const u8* bytes) {
[[nodiscard]] inline Common::Vec4<u8> DecodeRGBA8(const u8* bytes) {
return {bytes[3], bytes[2], bytes[1], bytes[0]};
}
@ -66,7 +66,7 @@ inline Common::Vec4<u8> DecodeRGBA8(const u8* bytes) {
* @param bytes Pointer to encoded source color
* @return Result color decoded as Common::Vec4<u8>
*/
inline Common::Vec4<u8> DecodeRGB8(const u8* bytes) {
[[nodiscard]] inline Common::Vec4<u8> DecodeRGB8(const u8* bytes) {
return {bytes[2], bytes[1], bytes[0], 255};
}
@ -75,7 +75,7 @@ inline Common::Vec4<u8> DecodeRGB8(const u8* bytes) {
* @param bytes Pointer to encoded source color
* @return Result color decoded as Common::Vec4<u8>
*/
inline Common::Vec4<u8> DecodeRG8(const u8* bytes) {
[[nodiscard]] inline Common::Vec4<u8> DecodeRG8(const u8* bytes) {
return {bytes[1], bytes[0], 0, 255};
}
@ -84,7 +84,7 @@ inline Common::Vec4<u8> DecodeRG8(const u8* bytes) {
* @param bytes Pointer to encoded source color
* @return Result color decoded as Common::Vec4<u8>
*/
inline Common::Vec4<u8> DecodeRGB565(const u8* bytes) {
[[nodiscard]] inline Common::Vec4<u8> DecodeRGB565(const u8* bytes) {
u16_le pixel;
std::memcpy(&pixel, bytes, sizeof(pixel));
return {Convert5To8((pixel >> 11) & 0x1F), Convert6To8((pixel >> 5) & 0x3F),
@ -96,7 +96,7 @@ inline Common::Vec4<u8> DecodeRGB565(const u8* bytes) {
* @param bytes Pointer to encoded source color
* @return Result color decoded as Common::Vec4<u8>
*/
inline Common::Vec4<u8> DecodeRGB5A1(const u8* bytes) {
[[nodiscard]] inline Common::Vec4<u8> DecodeRGB5A1(const u8* bytes) {
u16_le pixel;
std::memcpy(&pixel, bytes, sizeof(pixel));
return {Convert5To8((pixel >> 11) & 0x1F), Convert5To8((pixel >> 6) & 0x1F),
@ -108,7 +108,7 @@ inline Common::Vec4<u8> DecodeRGB5A1(const u8* bytes) {
* @param bytes Pointer to encoded source color
* @return Result color decoded as Common::Vec4<u8>
*/
inline Common::Vec4<u8> DecodeRGBA4(const u8* bytes) {
[[nodiscard]] inline Common::Vec4<u8> DecodeRGBA4(const u8* bytes) {
u16_le pixel;
std::memcpy(&pixel, bytes, sizeof(pixel));
return {Convert4To8((pixel >> 12) & 0xF), Convert4To8((pixel >> 8) & 0xF),
@ -120,7 +120,7 @@ inline Common::Vec4<u8> DecodeRGBA4(const u8* bytes) {
* @param bytes Pointer to encoded source value
* @return Depth value as an u32
*/
inline u32 DecodeD16(const u8* bytes) {
[[nodiscard]] inline u32 DecodeD16(const u8* bytes) {
u16_le data;
std::memcpy(&data, bytes, sizeof(data));
return data;
@ -131,7 +131,7 @@ inline u32 DecodeD16(const u8* bytes) {
* @param bytes Pointer to encoded source value
* @return Depth value as an u32
*/
inline u32 DecodeD24(const u8* bytes) {
[[nodiscard]] inline u32 DecodeD24(const u8* bytes) {
return (bytes[2] << 16) | (bytes[1] << 8) | bytes[0];
}
@ -140,7 +140,7 @@ inline u32 DecodeD24(const u8* bytes) {
* @param bytes Pointer to encoded source values
* @return Resulting values stored as a Common::Vec2
*/
inline Common::Vec2<u32> DecodeD24S8(const u8* bytes) {
[[nodiscard]] inline Common::Vec2<u32> DecodeD24S8(const u8* bytes) {
return {static_cast<u32>((bytes[2] << 16) | (bytes[1] << 8) | bytes[0]), bytes[3]};
}