1 files changed, 427 insertions, 0 deletions
diff --git a/Tools/QtBiomeVisualiser/BiomeView.cpp b/Tools/QtBiomeVisualiser/BiomeView.cpp
new file mode 100644
index 000000000..bbaccb369
--- /dev/null
+++ b/Tools/QtBiomeVisualiser/BiomeView.cpp
@@ -0,0 +1,427 @@
+#include "Globals.h"
+#include "BiomeView.h"
+#include "Chunk.h"
+#include <QPainter>
+#include <QResizeEvent>
+
+
+
+
+
+static const int DELTA_STEP = 120;  // The normal per-notch wheel delta
+
+
+
+
+
+BiomeView::BiomeView(QWidget * parent) :
+	super(parent),
+	m_X(0),
+	m_Z(0),
+	m_Zoom(1),
+	m_IsMouseDragging(false),
+	m_MouseWheelDelta(0)
+{
+	// Create the image used for undefined chunks:
+	int offset = 0;
+	for (int y = 0; y < 16; y++)
+	{
+		for (int x = 0; x < 16; x++)
+		{
+			uchar color = (((x & 8) ^ (y & 8)) == 0) ? 0x44 : 0x88;
+			m_EmptyChunkImage[offset++] = color;
+			m_EmptyChunkImage[offset++] = color;
+			m_EmptyChunkImage[offset++] = color;
+			m_EmptyChunkImage[offset++] = 0xff;
+		}
+	}
+
+	// Create the startup image:
+	redraw();
+
+	// Add a chunk-update callback mechanism:
+	connect(&m_Cache, SIGNAL(chunkAvailable(int, int)), this, SLOT(chunkAvailable(int, int)));
+
+	// Allow keyboard interaction:
+	setFocusPolicy(Qt::StrongFocus);
+}
+
+
+
+
+QSize BiomeView::minimumSizeHint() const
+{
+	return QSize(300, 300);
+}
+
+
+
+
+
+QSize BiomeView::sizeHint() const
+{
+	return QSize(800, 600);
+}
+
+
+
+
+
+void BiomeView::setChunkSource(std::shared_ptr<ChunkSource> a_ChunkSource)
+{
+	// Replace the source in the cache:
+	m_Cache.setChunkSource(a_ChunkSource);
+
+	// Redraw with the new source:
+	redraw();
+}
+
+
+
+
+
+void BiomeView::redraw()
+{
+	if (!hasData())
+	{
+		// No data means no image is displayed, no need to compose:
+		update();
+		return;
+	}
+
+	int chunksize = 16 * m_Zoom;
+
+	// first find the center block position
+	int centerchunkx = floor(m_X / 16);
+	int centerchunkz = floor(m_Z / 16);
+	// and the center of the screen
+	int centerx = m_Image.width()  / 2;
+	int centery = m_Image.height() / 2;
+	// and align for panning
+	centerx -= (m_X - centerchunkx * 16) * m_Zoom;
+	centery -= (m_Z - centerchunkz * 16) * m_Zoom;
+	// now calculate the topleft block on the screen
+	int startx = centerchunkx - centerx / chunksize - 1;
+	int startz = centerchunkz - centery / chunksize - 1;
+	// and the dimensions of the screen in blocks
+	int blockswide = m_Image.width()  / chunksize + 3;
+	int blockstall = m_Image.height() / chunksize + 3;
+
+	for (int z = startz; z < startz + blockstall; z++)
+	{
+		for (int x = startx; x < startx + blockswide; x++)
+		{
+			drawChunk(x, z);
+		}
+	}
+	update();
+}
+
+
+
+
+
+void BiomeView::chunkAvailable(int a_ChunkX, int a_ChunkZ)
+{
+	drawChunk(a_ChunkX, a_ChunkZ);
+	update();
+}
+
+
+
+
+
+void BiomeView::reload()
+{
+	if (!hasData())
+	{
+		return;
+	}
+	m_Cache.reload();
+
+	redraw();
+}
+
+
+
+
+
+void BiomeView::drawChunk(int a_ChunkX, int a_ChunkZ)
+{
+	if (!hasData())
+	{
+		return;
+	}
+
+	//fetch the chunk:
+	ChunkPtr chunk = m_Cache.fetch(a_ChunkX, a_ChunkZ);
+
+	// Figure out where on the screen this chunk should be drawn:
+	// first find the center chunk
+	int centerchunkx = floor(m_X / 16);
+	int centerchunkz = floor(m_Z / 16);
+	// and the center chunk screen coordinates
+	int centerx = m_Image.width()  / 2;
+	int centery = m_Image.height() / 2;
+	// which need to be shifted to account for panning inside that chunk
+	centerx -= (m_X - centerchunkx * 16) * m_Zoom;
+	centery -= (m_Z - centerchunkz * 16) * m_Zoom;
+	// centerx,y now points to the top left corner of the center chunk
+	// so now calculate our x,y in relation
+	double chunksize = 16 * m_Zoom;
+	centerx += (a_ChunkX - centerchunkx) * chunksize;
+	centery += (a_ChunkZ - centerchunkz) * chunksize;
+
+	int srcoffset = 0;
+	uchar * bits = m_Image.bits();
+	int imgstride = m_Image.bytesPerLine();
+
+	int skipx = 0,skipy = 0;
+	int blockwidth = chunksize, blockheight = chunksize;
+	// now if we're off the screen we need to crop
+	if (centerx < 0)
+	{
+		skipx = -centerx;
+		centerx = 0;
+	}
+	if (centery < 0)
+	{
+		skipy = -centery;
+		centery = 0;
+	}
+	// or the other side, we need to trim
+	if (centerx + blockwidth > m_Image.width())
+	{
+		blockwidth = m_Image.width() - centerx;
+	}
+	if (centery + blockheight > m_Image.height())
+	{
+		blockheight = m_Image.height() - centery;
+	}
+	if ((blockwidth <= 0) || (skipx >= blockwidth))
+	{
+		return;
+	}
+	int imgoffset = centerx * 4 + centery * imgstride;
+
+	// If the chunk is valid, use its data; otherwise use the empty placeholder:
+	const uchar * src = m_EmptyChunkImage;
+	if (chunk.get() != nullptr)
+	{
+		src = chunk->getImage();
+	}
+
+	// Blit or scale-blit the image:
+	for (int z = skipy; z < blockheight; z++, imgoffset += imgstride)
+	{
+		srcoffset = floor((double)z / m_Zoom) * 16 * 4;
+		if (m_Zoom == 1.0)
+		{
+			memcpy(bits + imgoffset, src + srcoffset + skipx * 4, (blockwidth - skipx) * 4);
+		}
+		else
+		{
+			int xofs = 0;
+			for (int x = skipx; x < blockwidth; x++, xofs +=4)
+			{
+				memcpy(bits + imgoffset + xofs, src + srcoffset + (int)floor((double)x / m_Zoom) * 4, 4);
+			}
+		}
+	}
+}
+
+
+
+
+
+void BiomeView::resizeEvent(QResizeEvent * a_Event)
+{
+	m_Image = QImage(a_Event->size(), QImage::Format_RGB32);
+	redraw();
+}
+
+
+
+
+
+void BiomeView::paintEvent(QPaintEvent * a_Event)
+{
+	QPainter p(this);
+	if (hasData())
+	{
+		p.drawImage(QPoint(0, 0), m_Image);
+	}
+	else
+	{
+		p.drawText(a_Event->rect(), Qt::AlignCenter, "No chunk source selected");
+	}
+	p.end();
+}
+
+
+
+
+
+void BiomeView::mousePressEvent(QMouseEvent * a_Event)
+{
+	m_LastX = a_Event->x();
+	m_LastY = a_Event->y();
+	m_IsMouseDragging = true;
+}
+
+
+
+
+
+void BiomeView::mouseMoveEvent(QMouseEvent * a_Event)
+{
+	if (m_IsMouseDragging)
+	{
+		// The user is dragging the mouse, move the view around:
+		m_X += (m_LastX - a_Event->x()) / m_Zoom;
+		m_Z += (m_LastY - a_Event->y()) / m_Zoom;
+		m_LastX = a_Event->x();
+		m_LastY = a_Event->y();
+		redraw();
+		return;
+	}
+
+	// TODO: Update the status bar info for the biome currently pointed at
+}
+
+
+
+
+
+void BiomeView::mouseReleaseEvent(QMouseEvent *)
+{
+	m_IsMouseDragging = false;
+}
+
+
+
+
+
+void BiomeView::wheelEvent(QWheelEvent * a_Event)
+{
+	m_MouseWheelDelta += a_Event->delta();
+	while (m_MouseWheelDelta >= DELTA_STEP)
+	{
+		increaseZoom();
+		m_MouseWheelDelta -= DELTA_STEP;
+	}
+	while (m_MouseWheelDelta <= -DELTA_STEP)
+	{
+		decreaseZoom();
+		m_MouseWheelDelta += DELTA_STEP;
+	}
+}
+
+
+
+
+
+void BiomeView::keyPressEvent(QKeyEvent * a_Event)
+{
+	switch (a_Event->key())
+	{
+		case Qt::Key_Up:
+		case Qt::Key_W:
+		{
+			m_Z -= 10.0 / m_Zoom;
+			redraw();
+			break;
+		}
+
+		case Qt::Key_Down:
+		case Qt::Key_S:
+		{
+			m_Z += 10.0 / m_Zoom;
+			redraw();
+			break;
+		}
+
+		case Qt::Key_Left:
+		case Qt::Key_A:
+		{
+			m_X -= 10.0 / m_Zoom;
+			redraw();
+			break;
+		}
+
+		case Qt::Key_Right:
+		case Qt::Key_D:
+		{
+			m_X += 10.0 / m_Zoom;
+			redraw();
+			break;
+		}
+
+		case Qt::Key_PageUp:
+		case Qt::Key_Q:
+		{
+			increaseZoom();
+			break;
+		}
+
+		case Qt::Key_PageDown:
+		case Qt::Key_E:
+		{
+			decreaseZoom();
+			break;
+		}
+	}
+}
+
+
+
+
+
+void BiomeView::decreaseZoom()
+{
+	if (m_Zoom > 1.001)
+	{
+		m_Zoom--;
+		if (m_Zoom < 1.0)
+		{
+			// Just crossed the 100%, fixate the 100% threshold:
+			m_Zoom = 1.0;
+		}
+	}
+	else if (m_Zoom > 0.01)
+	{
+		m_Zoom = m_Zoom / 2;
+	}
+	redraw();
+}
+
+
+
+
+
+void BiomeView::increaseZoom()
+{
+	if (m_Zoom > 0.99)
+	{
+		if (m_Zoom > 20.0)
+		{
+			// Zoom too large
+			return;
+		}
+		m_Zoom++;
+	}
+	else
+	{
+		m_Zoom = m_Zoom * 2;
+		if (m_Zoom > 1.0)
+		{
+			// Just crossed the 100%, fixate the 100% threshold:
+			m_Zoom = 1.0;
+		}
+	}
+	redraw();
+}
+
+
+
+