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Internals: Renamed ImBoolVector to ImBitVector, added low-level loose function to replicate the behavior include a help SetBitRange() function.

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ocornut
2020-03-13 18:42:10 +01:00
parent 1d5612a05e
commit 339ffd25a9
4 changed files with 59 additions and 42 deletions
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39
imgui_internal.h
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@ -73,7 +73,7 @@ Index of this file:
// Forward declarations
//-----------------------------------------------------------------------------
struct ImBoolVector; // Store 1-bit per value
struct ImBitVector; // Store 1-bit per value
struct ImRect; // An axis-aligned rectangle (2 points)
struct ImDrawDataBuilder; // Helper to build a ImDrawData instance
struct ImDrawListSharedData; // Data shared between all ImDrawList instances
@ -204,7 +204,8 @@ extern IMGUI_API ImGuiContext* GImGui; // Current implicit context pointer
// - Helpers: ImVec2/ImVec4 operators
// - Helpers: Maths
// - Helpers: Geometry
// - Helper: ImBoolVector
// - Helpers: Bit arrays
// - Helper: ImBitVector
// - Helper: ImPool<>
// - Helper: ImChunkStream<>
//-----------------------------------------------------------------------------
@ -350,16 +351,32 @@ IMGUI_API void ImTriangleBarycentricCoords(const ImVec2& a, const ImVec2&
inline float ImTriangleArea(const ImVec2& a, const ImVec2& b, const ImVec2& c) { return ImFabs((a.x * (b.y - c.y)) + (b.x * (c.y - a.y)) + (c.x * (a.y - b.y))) * 0.5f; }
IMGUI_API ImGuiDir ImGetDirQuadrantFromDelta(float dx, float dy);
// Helper: ImBoolVector
// Store 1-bit per value. Note that Resize() currently clears the whole vector.
struct IMGUI_API ImBoolVector
// Helpers: Bit arrays
inline bool ImBitArrayTestBit(const ImU32* arr, int n) { ImU32 mask = (ImU32)1 << (n & 31); return (arr[n >> 5] & mask) != 0; }
inline void ImBitArrayClearBit(ImU32* arr, int n) { ImU32 mask = (ImU32)1 << (n & 31); arr[n >> 5] &= ~mask; }
inline void ImBitArraySetBit(ImU32* arr, int n) { ImU32 mask = (ImU32)1 << (n & 31); arr[n >> 5] |= mask; }
inline void ImBitArraySetBitRange(ImU32* arr, int n, int n2)
{
ImVector<int> Storage;
ImBoolVector() { }
void Resize(int sz) { Storage.resize((sz + 31) >> 5); memset(Storage.Data, 0, (size_t)Storage.Size * sizeof(Storage.Data[0])); }
void Clear() { Storage.clear(); }
bool GetBit(int n) const { int off = (n >> 5); int mask = 1 << (n & 31); return (Storage[off] & mask) != 0; }
void SetBit(int n, bool v) { int off = (n >> 5); int mask = 1 << (n & 31); if (v) Storage[off] |= mask; else Storage[off] &= ~mask; }
while (n <= n2)
{
int a_mod = (n & 31);
int b_mod = ((n2 >= n + 31) ? 31 : (n2 & 31)) + 1;
ImU32 mask = (ImU32)(((ImU64)1 << b_mod) - 1) & ~(ImU32)(((ImU64)1 << a_mod) - 1);
arr[n >> 5] |= mask;
n = (n + 32) & ~31;
}
}
// Helper: ImBitVector
// Store 1-bit per value.
struct IMGUI_API ImBitVector
{
ImVector<ImU32> Storage;
void Create(int sz) { Storage.resize((sz + 31) >> 5); memset(Storage.Data, 0, (size_t)Storage.Size * sizeof(Storage.Data[0])); }
void Clear() { Storage.clear(); }
bool TestBit(int n) const { IM_ASSERT(n < (Storage.Size << 5)); return ImBitArrayTestBit(Storage.Data, n); }
void SetBit(int n) { IM_ASSERT(n < (Storage.Size << 5)); ImBitArraySetBit(Storage.Data, n); }
void ClearBit(int n) { IM_ASSERT(n < (Storage.Size << 5)); ImBitArrayClearBit(Storage.Data, n); }
};
// Helper: ImPool<>