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Internals: wrapped used of g.TempBuffer into ImFormatStringToTempBuffer/ImFormatStringToTempBufferV helpers.

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This leaves us room for growing the buffer if needed, and gives us a resizable buffer available for other work.
This commit is contained in:
ocornut 2022-06-07 19:16:00 +02:00
parent 64d6c30562
commit 23a785aeb3
3 changed files with 48 additions and 26 deletions
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37
imgui.cpp
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@ -1704,6 +1704,25 @@ int ImFormatStringV(char* buf, size_t buf_size, const char* fmt, va_list args)
}
#endif // #ifdef IMGUI_DISABLE_DEFAULT_FORMAT_FUNCTIONS
void ImFormatStringToTempBuffer(const char** out_buf, const char** out_buf_end, const char* fmt, ...)
{
ImGuiContext& g = *GImGui;
va_list args;
va_start(args, fmt);
int buf_len = ImFormatStringV(g.TempBuffer.Data, g.TempBuffer.Size, fmt, args);
*out_buf = g.TempBuffer.Data;
if (out_buf_end) { *out_buf_end = g.TempBuffer.Data + buf_len; }
va_end(args);
}
void ImFormatStringToTempBufferV(const char** out_buf, const char** out_buf_end, const char* fmt, va_list args)
{
ImGuiContext& g = *GImGui;
int buf_len = ImFormatStringV(g.TempBuffer.Data, g.TempBuffer.Size, fmt, args);
*out_buf = g.TempBuffer.Data;
if (out_buf_end) { *out_buf_end = g.TempBuffer.Data + buf_len; }
}
// CRC32 needs a 1KB lookup table (not cache friendly)
// Although the code to generate the table is simple and shorter than the table itself, using a const table allows us to easily:
// - avoid an unnecessary branch/memory tap, - keep the ImHashXXX functions usable by static constructors, - make it thread-safe.
@ -4482,6 +4501,7 @@ void ImGui::Initialize()
// Create default viewport
ImGuiViewportP* viewport = IM_NEW(ImGuiViewportP)();
g.Viewports.push_back(viewport);
g.TempBuffer.resize(1024 * 3 + 1, 0);
#ifdef IMGUI_HAS_DOCK
#endif
@ -5178,15 +5198,16 @@ bool ImGui::BeginChildEx(const char* name, ImGuiID id, const ImVec2& size_arg, b
SetNextWindowSize(size);
// Build up name. If you need to append to a same child from multiple location in the ID stack, use BeginChild(ImGuiID id) with a stable value.
const char* temp_window_name;
if (name)
ImFormatString(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), "%s/%s_%08X", parent_window->Name, name, id);
ImFormatStringToTempBuffer(&temp_window_name, NULL, "%s/%s_%08X", parent_window->Name, name, id);
else
ImFormatString(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), "%s/%08X", parent_window->Name, id);
ImFormatStringToTempBuffer(&temp_window_name, NULL, "%s/%08X", parent_window->Name, id);
const float backup_border_size = g.Style.ChildBorderSize;
if (!border)
g.Style.ChildBorderSize = 0.0f;
bool ret = Begin(g.TempBuffer, NULL, flags);
bool ret = Begin(temp_window_name, NULL, flags);
g.Style.ChildBorderSize = backup_border_size;
ImGuiWindow* child_window = g.CurrentWindow;
@ -13219,8 +13240,8 @@ void ImGui::ShowStackToolWindow(bool* p_open)
if (tool->CopyToClipboardOnCtrlC && IsKeyDown(ImGuiKey_ModCtrl) && IsKeyPressed(ImGuiKey_C))
{
tool->CopyToClipboardLastTime = (float)g.Time;
char* p = g.TempBuffer;
char* p_end = p + IM_ARRAYSIZE(g.TempBuffer);
char* p = g.TempBuffer.Data;
char* p_end = p + g.TempBuffer.Size;
for (int stack_n = 0; stack_n < tool->Results.Size && p + 3 < p_end; stack_n++)
{
*p++ = '/';
@ -13234,7 +13255,7 @@ void ImGui::ShowStackToolWindow(bool* p_open)
}
}
*p = '\0';
SetClipboardText(g.TempBuffer);
SetClipboardText(g.TempBuffer.Data);
}
// Display decorated stack
@ -13252,8 +13273,8 @@ void ImGui::ShowStackToolWindow(bool* p_open)
TableNextColumn();
Text("0x%08X", (n > 0) ? tool->Results[n - 1].ID : 0);
TableNextColumn();
StackToolFormatLevelInfo(tool, n, true, g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer));
TextUnformatted(g.TempBuffer);
StackToolFormatLevelInfo(tool, n, true, g.TempBuffer.Data, g.TempBuffer.Size);
TextUnformatted(g.TempBuffer.Data);
TableNextColumn();
Text("0x%08X", info->ID);
if (n == tool->Results.Size - 1)

5
imgui_internal.h
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@ -331,6 +331,8 @@ static inline bool ImCharIsBlankW(unsigned int c) { return c == ' ' || c =
// Helpers: Formatting
IMGUI_API int ImFormatString(char* buf, size_t buf_size, const char* fmt, ...) IM_FMTARGS(3);
IMGUI_API int ImFormatStringV(char* buf, size_t buf_size, const char* fmt, va_list args) IM_FMTLIST(3);
IMGUI_API void ImFormatStringToTempBuffer(const char** out_buf, const char** out_buf_end, const char* fmt, ...) IM_FMTARGS(3);
IMGUI_API void ImFormatStringToTempBufferV(const char** out_buf, const char** out_buf_end, const char* fmt, va_list args) IM_FMTLIST(3);
IMGUI_API const char* ImParseFormatFindStart(const char* format);
IMGUI_API const char* ImParseFormatFindEnd(const char* format);
IMGUI_API const char* ImParseFormatTrimDecorations(const char* format, char* buf, size_t buf_size);
@ -1809,7 +1811,7 @@ struct ImGuiContext
int WantCaptureMouseNextFrame; // Explicit capture override via SetNextFrameWantCaptureMouse()/SetNextFrameWantCaptureKeyboard(). Default to -1.
int WantCaptureKeyboardNextFrame; // "
int WantTextInputNextFrame;
char TempBuffer[1024 * 3 + 1]; // Temporary text buffer
ImVector<char> TempBuffer; // Temporary text buffer
ImGuiContext(ImFontAtlas* shared_font_atlas)
{
@ -1958,7 +1960,6 @@ struct ImGuiContext
FramerateSecPerFrameIdx = FramerateSecPerFrameCount = 0;
FramerateSecPerFrameAccum = 0.0f;
WantCaptureMouseNextFrame = WantCaptureKeyboardNextFrame = WantTextInputNextFrame = -1;
memset(TempBuffer, 0, sizeof(TempBuffer));
}
};

32
imgui_widgets.cpp
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@ -276,9 +276,9 @@ void ImGui::TextV(const char* fmt, va_list args)
return;
// FIXME-OPT: Handle the %s shortcut?
ImGuiContext& g = *GImGui;
const char* text_end = g.TempBuffer + ImFormatStringV(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), fmt, args);
TextEx(g.TempBuffer, text_end, ImGuiTextFlags_NoWidthForLargeClippedText);
const char* text, *text_end;
ImFormatStringToTempBufferV(&text, &text_end, fmt, args);
TextEx(text, text_end, ImGuiTextFlags_NoWidthForLargeClippedText);
}
void ImGui::TextColored(const ImVec4& col, const char* fmt, ...)
@ -359,8 +359,8 @@ void ImGui::LabelTextV(const char* label, const char* fmt, va_list args)
const ImGuiStyle& style = g.Style;
const float w = CalcItemWidth();
const char* value_text_begin = &g.TempBuffer[0];
const char* value_text_end = value_text_begin + ImFormatStringV(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), fmt, args);
const char* value_text_begin, *value_text_end;
ImFormatStringToTempBufferV(&value_text_begin, &value_text_end, fmt, args);
const ImVec2 value_size = CalcTextSize(value_text_begin, value_text_end, false);
const ImVec2 label_size = CalcTextSize(label, NULL, true);
@ -395,8 +395,8 @@ void ImGui::BulletTextV(const char* fmt, va_list args)
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
const char* text_begin = g.TempBuffer;
const char* text_end = text_begin + ImFormatStringV(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), fmt, args);
const char* text_begin, *text_end;
ImFormatStringToTempBufferV(&text_begin, &text_end, fmt, args);
const ImVec2 label_size = CalcTextSize(text_begin, text_end, false);
const ImVec2 total_size = ImVec2(g.FontSize + (label_size.x > 0.0f ? (label_size.x + style.FramePadding.x * 2) : 0.0f), label_size.y); // Empty text doesn't add padding
ImVec2 pos = window->DC.CursorPos;
@ -1910,9 +1910,9 @@ static const char* PatchFormatStringFloatToInt(const char* fmt)
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
if (fmt_start == fmt && fmt_end[0] == 0)
return "%d";
ImGuiContext& g = *GImGui;
ImFormatString(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), "%.*s%%d%s", (int)(fmt_start - fmt), fmt, fmt_end); // Honor leading and trailing decorations, but lose alignment/precision.
return g.TempBuffer;
const char* tmp_format;
ImFormatStringToTempBuffer(&tmp_format, NULL, "%.*s%%d%s", (int)(fmt_start - fmt), fmt, fmt_end); // Honor leading and trailing decorations, but lose alignment/precision.
return tmp_format;
#else
IM_ASSERT(0 && "DragInt(): Invalid format string!"); // Old versions used a default parameter of "%.0f", please replace with e.g. "%d"
#endif
@ -5835,9 +5835,9 @@ bool ImGui::TreeNodeExV(const char* str_id, ImGuiTreeNodeFlags flags, const char
if (window->SkipItems)
return false;
ImGuiContext& g = *GImGui;
const char* label_end = g.TempBuffer + ImFormatStringV(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), fmt, args);
return TreeNodeBehavior(window->GetID(str_id), flags, g.TempBuffer, label_end);
const char* label, *label_end;
ImFormatStringToTempBufferV(&label, &label_end, fmt, args);
return TreeNodeBehavior(window->GetID(str_id), flags, label, label_end);
}
bool ImGui::TreeNodeExV(const void* ptr_id, ImGuiTreeNodeFlags flags, const char* fmt, va_list args)
@ -5846,9 +5846,9 @@ bool ImGui::TreeNodeExV(const void* ptr_id, ImGuiTreeNodeFlags flags, const char
if (window->SkipItems)
return false;
ImGuiContext& g = *GImGui;
const char* label_end = g.TempBuffer + ImFormatStringV(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), fmt, args);
return TreeNodeBehavior(window->GetID(ptr_id), flags, g.TempBuffer, label_end);
const char* label, *label_end;
ImFormatStringToTempBufferV(&label, &label_end, fmt, args);
return TreeNodeBehavior(window->GetID(ptr_id), flags, label, label_end);
}
bool ImGui::TreeNodeBehaviorIsOpen(ImGuiID id, ImGuiTreeNodeFlags flags)