[nostalgia/core/studio] Decouple core TileSheetEditor from ImGui

src/nostalgia/core/studio/tilesheeteditor-imgui.cpp

@@ -0,0 +1,115 @@
+/*
+ * Copyright 2016 - 2022 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#include <iostream>
+
+#include <imgui.h>
+
+#include <nostalgia/common/point.hpp>
+#include <nostalgia/core/media.hpp>
+
+#include "tilesheeteditor-imgui.hpp"
+
+namespace nostalgia::core {
+
+TileSheetEditorImGui::TileSheetEditorImGui(Context *ctx, const ox::String &path): m_tileSheetEditor(ctx, path) {
+	m_itemPath = path;
+	const auto lastSlash = std::find(m_itemPath.rbegin(), m_itemPath.rend(), '/').offset();
+	m_itemName = m_itemPath.substr(lastSlash + 1);
+}
+
+ox::String TileSheetEditorImGui::itemName() const noexcept {
+	return m_itemPath;
+}
+
+ox::String TileSheetEditorImGui::itemDisplayName() const noexcept {
+	return m_itemName;
+}
+
+void TileSheetEditorImGui::exportFile() {
+}
+
+void TileSheetEditorImGui::cut() {
+	m_tileSheetEditor.cut();
+}
+
+void TileSheetEditorImGui::copy() {
+	m_tileSheetEditor.copy();
+}
+
+void TileSheetEditorImGui::paste() {
+	m_tileSheetEditor.paste();
+}
+
+void TileSheetEditorImGui::draw(core::Context*) noexcept {
+	const auto paneSize = ImGui::GetContentRegionAvail();
+	const auto tileSheetParentSize = ImVec2(paneSize.x - m_palViewWidth, paneSize.y);
+	const auto fbSize = common::Vec2(tileSheetParentSize.x - 16, tileSheetParentSize.y - 16);
+	ImGui::BeginChild("child1", ImVec2(tileSheetParentSize.x, tileSheetParentSize.y), true);
+	drawTileSheet(fbSize);
+	ImGui::EndChild();
+	ImGui::SameLine();
+	// draw palette/color picker
+	ImGui::BeginChild("child2", ImVec2(m_palViewWidth - 8, paneSize.y), true);
+	drawPalettePicker();
+	ImGui::EndChild();
+}
+
+void TileSheetEditorImGui::saveItem() {
+}
+
+void TileSheetEditorImGui::drawTileSheet(const common::Vec2 &fbSize) noexcept {
+	const auto fbSizei = common::Size(static_cast<int>(fbSize.x), static_cast<int>(fbSize.y));
+	if (m_framebuffer.width != fbSizei.width || m_framebuffer.height != fbSizei.height) {
+		m_framebuffer = glutils::generateFrameBuffer(fbSizei.width, fbSizei.height);
+		m_tileSheetEditor.resize(fbSize);
+	} else if (m_tileSheetEditor.updated()) {
+		m_tileSheetEditor.resize(fbSize);
+		m_tileSheetEditor.ackUpdate();
+	}
+	glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
+	// clear screen and draw
+	glViewport(0, 0, fbSizei.width, fbSizei.height);
+	m_tileSheetEditor.draw();
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+	ImGui::Image(reinterpret_cast<void*>(m_framebuffer.color.id), static_cast<ImVec2>(fbSize), ImVec2(0, 1), ImVec2(1, 0));
+	// handle input, this must come after drawing
+	if (ImGui::IsItemHovered()) {
+		const auto &io = ImGui::GetIO();
+		const auto wheel = io.MouseWheel;
+		const auto wheelh = io.MouseWheelH;
+		if (wheel != 0) {
+			const auto zoomMod = ox::defines::OS == ox::OS::Darwin ? io.KeySuper : io.KeyCtrl;
+			m_tileSheetEditor.scrollV(fbSize, wheel, zoomMod);
+		}
+		if (wheelh != 0) {
+			m_tileSheetEditor.scrollH(fbSize, wheelh);
+		}
+		if (io.MouseDown[0]) {
+			auto clickPos = common::Vec2(io.MousePos);
+			const auto &winPos = ImGui::GetWindowPos();
+			clickPos.x -= winPos.x + 10;
+			clickPos.y -= winPos.y + 10;
+			m_tileSheetEditor.clickPixel(fbSize, clickPos);
+		}
+	}
+}
+
+void TileSheetEditorImGui::drawPalettePicker() noexcept {
+	// header
+	ImGui::BeginTable("PaletteTable", 2);
+	ImGui::TableSetupColumn("No.", 0, 0.35);
+	ImGui::TableSetupColumn("Color16", 0, 3);
+	ImGui::TableHeadersRow();
+	for (auto i = 1; auto c : m_tileSheetEditor.pal().colors) {
+		ImGui::TableNextColumn();
+		ImGui::Text("%d", i);
+		ImGui::TableNextColumn();
+		ImGui::Text("(%d, %d, %d)", red16(c), green16(c), blue16(c));
+		++i;
+	}
+	ImGui::EndTable();
+}
+
+}