Working on removing ui label

archive/UILabel.cpp

@@ -0,0 +1,121 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UILabel.hpp"
+#include "game/DawnGame.hpp"
+
+using namespace Dawn;
+
+UILabel::UILabel(SceneItem *item) :
+  UIComponentRenderable(item),
+  text(""),
+  fontSize(10.0f),
+  font(&item->scene->game->renderManager.defaultFont),
+  maxWidth(UI_LABEL_MAX_WIDTH_ALIGN),
+  startQuad(0),
+  quadCount(-1)
+{
+}
+
+bool_t UILabel::hasText() {
+  return (
+    this->font != nullptr &&
+    this->font->isReady() &&
+    ((std::string)this->text).size() > 0
+  );
+}
+
+void UILabel::updateMesh() {
+  if(!this->needsRebuffering) return;
+  if(!this->hasText()) return;
+
+  float_t width = this->maxWidth;
+  assertTrue(
+    width == UI_LABEL_MAX_WIDTH_NONE ||
+    width == UI_LABEL_MAX_WIDTH_ALIGN ||
+    width > 0
+  );
+
+  if(width == UI_LABEL_MAX_WIDTH_ALIGN) {
+    auto dimensional = this->getParentDimensional();
+    auto align = (glm::vec4)this->alignment;
+    float_t x;
+    UIComponent::calculateDimensions(
+      this->alignX,
+      this->alignUnitLeft,
+      this->alignUnitRight,
+      &x,
+      &width,
+      dimensional->getWidth(),
+      0,
+      glm::vec2(align[0], align[2])
+    );
+  }
+  
+  this->font->buffer(
+    text,
+    fontSize,
+    width,
+    &this->mesh,
+    &this->measure
+  );
+
+  this->needsRebuffering = false;
+
+  this->eventFontRebuffered.invoke();
+}
+
+std::vector<struct ShaderPassItem> UILabel::getUIRenderPasses() {
+  if(!this->hasText()) return {};
+  this->updateMesh();
+  
+  struct ShaderPassItem item;
+  auto shader = getGame()->renderManager.uiShader;
+  item.shader = shader;
+  item.colorValues[shader->paramColor] = textColor;
+  item.parameterBuffers[shader->bufferUiCanvas] = &getCanvas()->shaderBuffer;
+  item.matrixValues[shader->paramModel] = this->transform->getWorldTransform();
+  item.textureSlots[0] = this->font->getTexture();
+  item.textureValues[shader->paramTexture] = 0;
+  item.start = this->startQuad * QUAD_INDICE_COUNT;
+  item.count = this->quadCount == -1 ? -1 : this->quadCount * QUAD_INDICE_COUNT;
+  item.w = this->transform->getWorldPosition().z;
+  item.renderFlags = RENDER_MANAGER_RENDER_FLAG_BLEND;
+  item.mesh = &mesh;
+  
+  return { item };
+}
+
+float_t UILabel::getContentWidth() {
+  if(!this->hasText()) return 0;
+  this->updateMesh();
+  return this->measure.getWidth();
+}
+
+float_t UILabel::getContentHeight() {
+  if(!this->hasText()) return 0;
+  this->updateMesh();
+  return this->measure.getHeight();
+}
+
+void UILabel::onStart() {
+  UIComponent::onStart();
+
+  useEffect([&]{
+    alignmentNeedsUpdating = true;
+  }, { &fontSize, &font, &text, &maxWidth, &startQuad, &quadCount });
+
+  useEffect([&]{
+    eventTextChanged.invoke();
+  }, text);
+
+  useEffect([&]{
+    needsRebuffering = true;
+  }, alignmentNeedsUpdating);
+
+  useEvent([&]{
+    needsRebuffering = true;
+  }, eventAlignmentUpdated);
+}

archive/UILabel.hpp

@@ -0,0 +1,59 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "UIComponentRenderable.hpp"
+#include "display/font/Font.hpp"
+
+#define UI_LABEL_MAX_WIDTH_NONE -1
+#define UI_LABEL_MAX_WIDTH_ALIGN 0
+
+namespace Dawn {
+  class UILabel : public UIComponentRenderable {
+    private:
+      bool_t needsRebuffering = true;
+      Mesh mesh;
+
+      /**
+       * Returns true if the label contains renderable text.
+       * 
+       * @return True if the label has text, otherwise false.
+       */
+      bool_t hasText();
+
+      /**
+       * Internally performs the mesh update.
+       */
+      void updateMesh();
+
+    public:
+      //@optional
+      StateProperty<std::string> text;
+      // @optional
+      StateProperty<float_t> fontSize;
+      /* @optional */
+      StateProperty<Font*> font;
+      /* @optional */
+      StateProperty<float_t> maxWidth;
+      /* @optional */
+      struct Color textColor = COLOR_WHITE;
+      // @optional
+      StateProperty<int32_t> startQuad;
+      // @optional
+      StateProperty<int32_t> quadCount;
+
+      StateEvent<> eventFontRebuffered;
+      StateEvent<> eventTextChanged;
+      
+      struct FontMeasure measure;
+
+      UILabel(SceneItem *item);
+
+      float_t getContentWidth() override;
+      float_t getContentHeight() override;
+      std::vector<struct ShaderPassItem> getUIRenderPasses() override;
+      void onStart() override;
+  };
+}