forked from Mirror/libstarlight
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
#include "starlight/GFXManager.h"
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#include "starlight/gfx/DrawContextCanvas.h"
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#include "UICanvas.h"
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using starlight::gfx::Drawable;
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using starlight::gfx::DrawContext;
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using starlight::gfx::DrawContextCanvas;
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using starlight::ui::UIElement;
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using starlight::ui::UIContainer;
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using starlight::ui::UICanvas;
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UICanvas::UICanvas(VRect rect) {
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this->rect = rect;
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}
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void UICanvas::MarkForRedraw() {
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needsRedraw = true;
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this->UIElement::MarkForRedraw();
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}
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void UICanvas::PreDrawOffscreen() {
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if (drawContext) {
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drawContext.reset();
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for (auto& it : children) { it->PreDrawOffscreen(); }
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}
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}
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void UICanvas::PreDraw() {
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if (!drawContext) drawContext = std::make_unique<starlight::gfx::DrawContextCanvas>(rect.size);
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else if (!needsRedraw) return;
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drawContext->Clear();
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GFXManager::PushContext(drawContext.get());
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GFXManager::PushOffsetAdd(-scrollOffset);
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GFXManager::PrepareForDrawing(); // force clear to take so you don't get garbage if nothing renders
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VRect vr = ViewportRect();
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// both passes here so as not to mix things; one rendertarget at a time, please
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for (auto& it : children) { if (it->rect.Overlaps(vr)) it->PreDraw(); else it->PreDrawOffscreen(); }
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for (auto& it : children) { if (it->rect.Overlaps(vr)) it->Draw(); }
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GFXManager::PopOffset();
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GFXManager::PopContext();
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needsRedraw = false;
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}
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void UICanvas::Draw() {
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static_cast<DrawContextCanvas*>(drawContext.get())->Draw(rect + GFXManager::GetOffset());
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}
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