[nostalgia] Add basic support for subsheets

2022-02-26 22:48:18 -06:00
parent 329ecb3266
commit e8a046c2dc
20 changed files with 630 additions and 238 deletions
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2016 - 2022 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#include <nostalgia/core/consts.hpp>
+#include <nostalgia/core/media.hpp>
+#include <nostalgia/geo/point.hpp>
+
+#include "tilesheeteditorview.hpp"
+
+namespace nostalgia::core {
+
+TileSheetEditorView::TileSheetEditorView(Context *ctx, const ox::String &path): m_model(ctx, path) {
+	// build shaders
+	oxThrowError(m_pixelsDrawer.buildShader());
+	oxThrowError(m_pixelGridDrawer.buildShader());
+	m_model.activeSubsheetChanged.connect(this, &TileSheetEditorView::setActiveSubsheet);
+}
+
+void TileSheetEditorView::draw() noexcept {
+	constexpr Color32 bgColor = 0x717d7e;
+	glClearColor(redf(bgColor), greenf(bgColor), bluef(bgColor), 1.f);
+	glClear(GL_COLOR_BUFFER_BIT);
+	m_pixelsDrawer.draw(updated(), m_scrollOffset);
+	m_pixelGridDrawer.draw(updated(), m_scrollOffset);
+}
+
+void TileSheetEditorView::scrollV(const geo::Vec2 &paneSz, float wheel, bool zoomMod) noexcept {
+	const auto pixelSize = m_pixelsDrawer.pixelSize(paneSz);
+	const ImVec2 sheetSize(pixelSize.x * static_cast<float>(m_model.activeSubSheet()->columns) * TileWidth,
+	                       pixelSize.y * static_cast<float>(m_model.activeSubSheet()->rows) * TileHeight);
+	if (zoomMod) {
+		m_pixelSizeMod = ox::clamp(m_pixelSizeMod + wheel * 0.02f, 0.55f, 2.f);
+		m_pixelsDrawer.setPixelSizeMod(m_pixelSizeMod);
+		m_pixelGridDrawer.setPixelSizeMod(m_pixelSizeMod);
+		m_updated = true;
+	} else {
+		m_scrollOffset.y -= wheel * 0.1f;
+	}
+	// adjust scroll offset in both cases because the image can be zoomed
+	// or scrolled off screen
+	m_scrollOffset.y = ox::clamp(m_scrollOffset.y, 0.f, sheetSize.y / 2);
+}
+
+void TileSheetEditorView::scrollH(const geo::Vec2 &paneSz, float wheelh) noexcept {
+	const auto pixelSize = m_pixelsDrawer.pixelSize(paneSz);
+	const ImVec2 sheetSize(pixelSize.x * static_cast<float>(m_model.activeSubSheet()->columns) * TileWidth,
+						   pixelSize.y * static_cast<float>(m_model.activeSubSheet()->rows) * TileHeight);
+	m_scrollOffset.x += wheelh * 0.1f;
+	m_scrollOffset.x = ox::clamp(m_scrollOffset.x, -(sheetSize.x / 2), 0.f);
+}
+
+void TileSheetEditorView::click(const geo::Vec2 &paneSize, const geo::Vec2 &clickPos) noexcept {
+	auto [x, y] = clickPos;
+	const auto pixDrawSz = m_pixelsDrawer.pixelSize(paneSize);
+	x /= paneSize.x;
+	y /= paneSize.y;
+	x += -m_scrollOffset.x / 2;
+	y += m_scrollOffset.y / 2;
+	x /= pixDrawSz.x;
+	y /= pixDrawSz.y;
+	const auto pt = geo::Point(static_cast<int>(x * 2), static_cast<int>(y * 2));
+	m_model.drawCommand(pt, m_palIdx);
+}
+
+void TileSheetEditorView::releaseMouseButton() noexcept {
+	m_model.endDrawCommand();
+}
+
+void TileSheetEditorView::resizeView(const geo::Vec2 &sz) noexcept {
+	m_viewSize = sz;
+	initView();
+}
+
+bool TileSheetEditorView::updated() const noexcept {
+	return m_updated || m_model.updated();
+}
+
+void TileSheetEditorView::ackUpdate() noexcept {
+	m_updated = false;
+	m_model.ackUpdate();
+}
+
+void TileSheetEditorView::initView() noexcept {
+	m_pixelsDrawer.initBufferSet(m_viewSize, img(), *m_model.activeSubSheet(), pal());
+	m_pixelGridDrawer.initBufferSet(m_viewSize, *m_model.activeSubSheet());
+}
+
+ox::Error TileSheetEditorView::setActiveSubsheet(const TileSheet::SubSheetIdx&) noexcept {
+	initView();
+	return OxError(0);
+}
+
+}