B.O.M.J
Эксперт
-
Автор темы
- #1
имгуи все дела
вот код колор пикера
Вот так происходит преобразование колора в float
собственно говоря проблема
вот код колор пикера
C#:
bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flags)
{
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return false;
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
const float square_sz = GetFrameHeight();
const float w_full = CalcItemWidth();
const float w_button = (flags & ImGuiColorEditFlags_NoSmallPreview) ? 0.0f : (square_sz + style.ItemInnerSpacing.x);
const float w_inputs = w_full - w_button;
const char* label_display_end = FindRenderedTextEnd(label);
g.NextItemData.ClearFlags();
BeginGroup();
PushID(label);
// If we're not showing any slider there's no point in doing any HSV conversions
const ImGuiColorEditFlags flags_untouched = flags;
if (flags & ImGuiColorEditFlags_NoInputs)
flags = (flags & (~ImGuiColorEditFlags__DisplayMask)) | ImGuiColorEditFlags_DisplayRGB | ImGuiColorEditFlags_NoOptions;
// Context menu: display and modify options (before defaults are applied)
if (!(flags & ImGuiColorEditFlags_NoOptions))
ColorEditOptionsPopup(col, flags);
// Read stored options
if (!(flags & ImGuiColorEditFlags__DisplayMask))
flags |= (g.ColorEditOptions & ImGuiColorEditFlags__DisplayMask);
if (!(flags & ImGuiColorEditFlags__DataTypeMask))
flags |= (g.ColorEditOptions & ImGuiColorEditFlags__DataTypeMask);
if (!(flags & ImGuiColorEditFlags__PickerMask))
flags |= (g.ColorEditOptions & ImGuiColorEditFlags__PickerMask);
if (!(flags & ImGuiColorEditFlags__InputMask))
flags |= (g.ColorEditOptions & ImGuiColorEditFlags__InputMask);
flags |= (g.ColorEditOptions & ~(ImGuiColorEditFlags__DisplayMask | ImGuiColorEditFlags__DataTypeMask | ImGuiColorEditFlags__PickerMask | ImGuiColorEditFlags__InputMask));
IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiColorEditFlags__DisplayMask)); // Check that only 1 is selected
IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiColorEditFlags__InputMask)); // Check that only 1 is selected
const bool alpha = (flags & ImGuiColorEditFlags_NoAlpha) == 0;
const bool hdr = (flags & ImGuiColorEditFlags_HDR) != 0;
const int components = alpha ? 4 : 3;
// Convert to the formats we need
float f[4] = { col[0], col[1], col[2], alpha ? col[3] : 1.0f };
if ((flags & ImGuiColorEditFlags_InputHSV) && (flags & ImGuiColorEditFlags_DisplayRGB))
ColorConvertHSVtoRGB(f[0], f[1], f[2], f[0], f[1], f[2]);
else if ((flags & ImGuiColorEditFlags_InputRGB) && (flags & ImGuiColorEditFlags_DisplayHSV))
{
// Hue is lost when converting from greyscale rgb (saturation=0). Restore it.
ColorConvertRGBtoHSV(f[0], f[1], f[2], f[0], f[1], f[2]);
if (memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0)
{
if (f[1] == 0)
f[0] = g.ColorEditLastHue;
if (f[2] == 0)
f[1] = g.ColorEditLastSat;
}
}
int i[4] = { IM_F32_TO_INT8_UNBOUND(f[0]), IM_F32_TO_INT8_UNBOUND(f[1]), IM_F32_TO_INT8_UNBOUND(f[2]), IM_F32_TO_INT8_UNBOUND(f[3]) };
bool value_changed = false;
bool value_changed_as_float = false;
const ImVec2 pos = window->DC.CursorPos;
const float inputs_offset_x = (style.ColorButtonPosition == ImGuiDir_Left) ? w_button : 0.0f;
window->DC.CursorPos.x = pos.x + inputs_offset_x;
static std::map<ImGuiID, colorpicket_state> open_animation;
auto it_open = open_animation.find(GetCurrentWindow()->GetID(label));
if (it_open == open_animation.end())
{
open_animation.insert({ GetCurrentWindow()->GetID(label), {false, 0.f} });
it_open = open_animation.find(GetCurrentWindow()->GetID(label));
}
it_open->second.mult = std::clamp(it_open->second.mult + 0.03f + (it_open->second.mult * 0.03f) * GetIO().DeltaTime * (it_open->second.play ? 1.f : -1.f), 0.01f, 1.f);
if (!it_open->second.play)
it_open->second.mult = 0.01f;
ImGuiWindow* picker_active_window = NULL;
if (!(flags & ImGuiColorEditFlags_NoSmallPreview))
{
const float button_offset_x = ((flags & ImGuiColorEditFlags_NoInputs) || (style.ColorButtonPosition == ImGuiDir_Left)) ? 0.0f : w_inputs + style.ItemInnerSpacing.x;
window->DC.CursorPos = ImVec2(pos.x + button_offset_x, pos.y);
const ImVec4 col_v4(col[0], col[1], col[2], alpha ? col[3] : 1.0f);
SetCursorPosX(window->Size.x - 25);
if (ColorButton("##ColorButton", col_v4, flags))
{
if (!(flags & ImGuiColorEditFlags_NoPicker))
{
it_open->second.play = true;
// Store current color and open a picker
g.ColorPickerRef = col_v4;
OpenPopup("picker");
SetNextWindowPos(window->DC.LastItemRect.GetBL() + ImVec2(-6, style.ItemSpacing.y - 2));
}
}
if (!(flags & ImGuiColorEditFlags_NoOptions))
OpenPopupOnItemClick("context");
PushStyleVar(ImGuiStyleVar_Alpha, it_open->second.mult);
PushStyleVar(ImGuiStyleVar_::ImGuiStyleVar_PopupBorderSize, 0);
PushStyleVar(ImGuiStyleVar_::ImGuiStyleVar_PopupRounding, 4);
PushStyleColor(ImGuiCol_PopupBg, ImVec4(41 / 255.f, 40 / 255.f, 46 / 255.f, it_open->second.mult * 0.8f));
if (BeginPopup("picker", ImGuiWindowFlags_NoMove))
{
picker_active_window = g.CurrentWindow;
ImGuiColorEditFlags picker_flags_to_forward = ImGuiColorEditFlags__DataTypeMask | ImGuiColorEditFlags__PickerMask | ImGuiColorEditFlags__InputMask | ImGuiColorEditFlags_HDR | ImGuiColorEditFlags_NoAlpha | ImGuiColorEditFlags_AlphaBar;
ImGuiColorEditFlags picker_flags = (flags_untouched & picker_flags_to_forward) | ImGuiColorEditFlags__DisplayMask | ImGuiColorEditFlags_NoLabel | ImGuiColorEditFlags_AlphaPreviewHalf;
SetNextItemWidth(min(it_open->second.mult * 3.2, 1.f) * square_sz * 12.0f); // Use 256 + bar sizes?
value_changed |= ColorPicker4("##picker", col, picker_flags, &g.ColorPickerRef.x);
EndPopup();
}
else
it_open->second.play = false;
PopStyleVar(3);
PopStyleColor();
}
if (label != label_display_end && !(flags & ImGuiColorEditFlags_NoLabel))
{
window->DC.CursorPos = ImVec2(pos.x + w_button, pos.y + style.FramePadding.y);
SetCursorPosX(10);
TextEx(label, label_display_end);
}
// Convert back
if (value_changed && picker_active_window == NULL)
{
if (!value_changed_as_float)
for (int n = 0; n < 4; n++)
f[n] = i[n] / 255.0f;
if ((flags & ImGuiColorEditFlags_DisplayHSV) && (flags & ImGuiColorEditFlags_InputRGB))
{
g.ColorEditLastHue = f[0];
g.ColorEditLastSat = f[1];
ColorConvertHSVtoRGB(f[0], f[1], f[2], f[0], f[1], f[2]);
memcpy(g.ColorEditLastColor, f, sizeof(float) * 3);
}
if ((flags & ImGuiColorEditFlags_DisplayRGB) && (flags & ImGuiColorEditFlags_InputHSV))
ColorConvertRGBtoHSV(f[0], f[1], f[2], f[0], f[1], f[2]);
col[0] = f[0];
col[1] = f[1];
col[2] = f[2];
if (alpha)
col[3] = f[3];
}
PopID();
EndGroup();
// Drag and Drop Target
// NB: The flag test is merely an optional micro-optimization, BeginDragDropTarget() does the same test.
if ((window->DC.LastItemStatusFlags & ImGuiItemStatusFlags_HoveredRect) && !(flags & ImGuiColorEditFlags_NoDragDrop) && BeginDragDropTarget())
{
bool accepted_drag_drop = false;
if (const ImGuiPayload* payload = AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F))
{
memcpy((float*)col, payload->Data, sizeof(float) * 3); // Preserve alpha if any //-V512
value_changed = accepted_drag_drop = true;
}
if (const ImGuiPayload* payload = AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F))
{
memcpy((float*)col, payload->Data, sizeof(float) * components);
value_changed = accepted_drag_drop = true;
}
// Drag-drop payloads are always RGB
if (accepted_drag_drop && (flags & ImGuiColorEditFlags_InputHSV))
ColorConvertRGBtoHSV(col[0], col[1], col[2], col[0], col[1], col[2]);
EndDragDropTarget();
}
// When picker is being actively used, use its active id so IsItemActive() will function on ColorEdit4().
if (picker_active_window && g.ActiveId != 0 && g.ActiveIdWindow == picker_active_window)
window->DC.LastItemId = g.ActiveId;
if (value_changed)
MarkItemEdited(window->DC.LastItemId);
return value_changed;
}
Код:
bool c_menu::color_edit(const char* label, Color* color)
{
float fcolor[4] =
{
color->r() / 255.0f,
color->g() / 255.0f,
color->b() / 255.0f,
color->a() / 255.0f
};
if (ImGui::ColorEdit4(label, fcolor, ImGuiColorEditFlags_NoInputs | ImGuiColorEditFlags_RGB)) {
color->SetColor(fcolor[0], fcolor[1], fcolor[2], fcolor[3]);
return true;
}
return false;
}
