public static void drawRect(RectangleF rect, Vector4 color, Matrix4 MVPMatrix)
{
float x = rect.X;
float y = rect.Y;
float width = rect.Width;
float height = rect.Height;
float[] Vertices =
{
x + width, y,
x + width, y + height,
x, y,
x, y + height
};
AmbientShader shader = AmbientShader.Singleton;
// Use shader
shader.Use();
shader.SetColor(color);
shader.SetMVPMatrix(MVPMatrix);
shader.EnableVertices(2, VertexAttribPointerType.Float, false, 0, Vertices);
GL.DrawArrays(BeginMode.TriangleStrip, 0, 4);
shader.DisableVertices();
GLHelper.GetError();
}
private void ShowZoom(uint texName, IntPtr buffer, Vector4 selectPos, float viewHeight, Matrix4 projMatrix, int offsetY)
{
// GL has inverted y axis
Vector2 invertSelectPos = new Vector2(selectPos.X, viewHeight - selectPos.Y);
Rectangle readRect = new Rectangle((int)selectPos.X - zoomSize.Width / 2, (int)invertSelectPos.Y - zoomSize.Height / 2, zoomSize.Width, zoomSize.Height);
Rectangle drawRect = new Rectangle((int)selectPos.X - zoomSize.Width / 2, (int)selectPos.Y - zoomSize.Height / 2 + offsetY + zoomSize.Height, zoomSize.Width, -zoomSize.Height);
readPixelsToTexture(readRect, texName, buffer);
GLHelper.DrawSprite(texName, drawRect, projMatrix, null, Vector4.One);
// Draw edge
float[] Vertices =
{
drawRect.X, drawRect.Y,
drawRect.X + drawRect.Width, drawRect.Y,
drawRect.X + drawRect.Width, drawRect.Y + drawRect.Height,
drawRect.X, drawRect.Y + drawRect.Height
};
GL.LineWidth(2);
GL.BlendFunc(BlendingFactorSrc.One, BlendingFactorDest.SrcColor);
AmbientShader shader = AmbientShader.Singleton;
shader.Use();
shader.SetColor(new Vector4(0.2f, 0.2f, 0.2f, 0.7f));
shader.SetMVPMatrix(projMatrix);
shader.EnableVertices(2, VertexAttribPointerType.Float, false, 0, Vertices);
GL.DrawArrays(BeginMode.LineLoop, 0, 4);
shader.DisableVertices();
GL.LineWidth(1);
}
public static void DrawROI(RectangleF viewRect, Vector2 vROICenter, float fROIRadius, Rectangle roiRect, uint roiMaskTexName,
Vector4 outlineColor, float outlineWidth, Vector4 bgColor, Matrix4 MVMatrix, Matrix4 PMatrix)
{
Matrix4 MVPMatrix = MVMatrix * PMatrix;
GL.Enable(EnableCap.Blend);
{
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
// GL.BlendFunc(All.Zero, All.OneMinusSrcAlpha);
GLHelper.DrawSprite(roiMaskTexName, roiRect, MVPMatrix, null, bgColor);
}
// Draw 4 areas outside ROI
{
Vector4 vTopLeft = Vector4.Transform(new Vector4(roiRect.X, roiRect.Y, 0, 1), MVMatrix);
Vector4 vButtomRight = Vector4.Transform(new Vector4(roiRect.Right, roiRect.Bottom, 0, 1), MVMatrix);
RectangleF boxRect;
boxRect = RectangleF.Intersect(viewRect, new RectangleF(0, 0, viewRect.Width, vTopLeft.Y));
if (boxRect != RectangleF.Empty)
{
GLHelper.drawRect(boxRect, bgColor, PMatrix);
}
boxRect = RectangleF.Intersect(viewRect, new RectangleF(0, vButtomRight.Y, viewRect.Width, viewRect.Height - vButtomRight.Y));
if (boxRect != RectangleF.Empty)
{
GLHelper.drawRect(boxRect, bgColor, PMatrix);
}
boxRect = RectangleF.Intersect(viewRect, new RectangleF(0, vTopLeft.Y, vTopLeft.X, vButtomRight.Y - vTopLeft.Y));
if (boxRect != RectangleF.Empty)
{
GLHelper.drawRect(boxRect, bgColor, PMatrix);
}
boxRect = RectangleF.Intersect(viewRect, new RectangleF(vButtomRight.X, vTopLeft.Y, viewRect.Width - vButtomRight.X, vButtomRight.Y - vTopLeft.Y));
if (boxRect != RectangleF.Empty)
{
GLHelper.drawRect(boxRect, bgColor, PMatrix);
}
}
GL.Disable(EnableCap.Blend);
// ROI sphere
{
float r = fROIRadius;
Vector2 pos = vROICenter;
float[] vertices = GLHelper.CreateSphereVertices(pos, r, false);
float oldLineWidth = 1;
GL.GetFloat(GetPName.LineWidth, out oldLineWidth);
GL.LineWidth(outlineWidth);
AmbientShader shader = AmbientShader.Singleton;
shader.Use();
shader.SetColor(outlineColor);
shader.SetMVPMatrix(MVPMatrix);
shader.EnableVertices(2, VertexAttribPointerType.Float, false, 0, vertices);
GL.DrawArrays(BeginMode.LineLoop, 0, vertices.Length / 2);
shader.DisableVertices();
GL.LineWidth(oldLineWidth);
}
}
public static void DrawRegions(ICollection <Region> regions, Matrix4 modelViewMatrix, Matrix4 projectionMatrix)
{
float offsetX = modelViewMatrix.M41;
float offsetY = modelViewMatrix.M42;
float scale = modelViewMatrix.M11;
AmbientShader shader = AmbientShader.Singleton;
shader.Use();
bool bDrawRegionData = false;
if (bDrawRegionData)
{
shader.SetColor(new Vector4(1, 0, 0, 1));
shader.SetMVPMatrix(projectionMatrix);
foreach (Region region in regions)
{
int count = region.Points.Count;
if (count > 0)
{
float[] vertices = new float[count * 2];
int iSource = 0;
int iTarget = 0;
while (iSource < count)
{
vertices[iTarget++] = region.Points[iSource].X * scale + offsetX;
vertices[iTarget++] = region.Points[iSource].Y * scale + offsetY;
iSource++;
}
shader.EnableVertices(2, VertexAttribPointerType.Float, false, 0, vertices);
GL.DrawArrays(BeginMode.Points, 0, count);
shader.DisableVertices();
}
}
}
Vector4 color = ColorHelper.Region;
shader.SetColor(color);
shader.SetMVPMatrix(modelViewMatrix * projectionMatrix);
foreach (Region region in regions)
{
int x = region.Bounds.X;
int y = region.Bounds.Y;
int width = region.Bounds.Width;
int height = region.Bounds.Height;
float[] Vertices =
{
x + width, y,
x + width, y + height,
x, y + height,
x, y,
};
shader.EnableVertices(2, VertexAttribPointerType.Float, false, 0, Vertices);
GL.DrawArrays(BeginMode.LineLoop, 0, 4);
shader.DisableVertices();
}
}
public static void updateROIMask(Rectangle roiRect, Size imageSize, uint frameBuffer, uint roiMaskTexName, uint maskTexName)
{
GLHelper.GetError();
// Setup viewport
int[] oldViewPort = new int[4];
GL.GetInteger(GetPName.Viewport, oldViewPort);
GL.Viewport(0, 0, roiRect.Size.Width, roiRect.Size.Height);
int fboOld = GLHelper.bindFrameBuffer(frameBuffer, roiMaskTexName);
// Fill with 1.1.1.1
GL.ClearColor(1.0f, 1.0f, 1.0f, 1.0f);
GL.Clear(ClearBufferMask.ColorBufferBit);
GLHelper.GetError();
// Draw crop
if (true)
{
float[] vertices = GLHelper.CreateSphereVertices(new Vector2((float)roiRect.Size.Width * 0.5f, (float)roiRect.Size.Height * 0.5f), (float)roiRect.Size.Height * 0.5f, true);
// Set Model view
Matrix4 MVPMatrix = Matrix4.CreateOrthographicOffCenter(0, (float)roiRect.Size.Width, 0, (float)roiRect.Size.Height, -1.0f, 1.0f);
AmbientShader shader = AmbientShader.Singleton;
shader.Use();
shader.SetColor(new Vector4(0, 0, 0, 0));
shader.SetMVPMatrix(MVPMatrix);
shader.EnableVertices(2, VertexAttribPointerType.Float, false, 0, vertices);
GLHelper.GetError();
GL.DrawArrays(BeginMode.TriangleFan, 0, vertices.Length / 2);
shader.DisableVertices();
}
// Draw mask
if (true)
{
// Render to source texture
float left = (float)roiRect.Location.X / (float)imageSize.Width;
float right = (float)(roiRect.Location.X + roiRect.Size.Width) / (float)imageSize.Width;
float top = (float)roiRect.Location.Y / (float)imageSize.Height;
float button = (float)(roiRect.Location.Y + roiRect.Size.Height) / (float)imageSize.Height;
// NB: texture coords are mirrored vertically
float[] texCoords = { right, top, right, button, left,
top, left, button };
Matrix4 mat = Matrix4.CreateOrthographicOffCenter(0, (float)roiRect.Size.Width, 0, (float)roiRect.Size.Height, -1.0f, 1.0f);
Rectangle r = new Rectangle(0, 0, roiRect.Width, roiRect.Height);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GLHelper.DrawSprite(maskTexName, r, mat, texCoords, Vector4.One);
GL.Disable(EnableCap.Blend);
}
// unbind framebuffer
GL.BindFramebuffer(FramebufferTarget.Framebuffer, fboOld);
// Cleanup viewport
GL.Viewport(oldViewPort[0], oldViewPort[1], oldViewPort[2], oldViewPort[3]);
GLHelper.GetError();
}
public static void MaskDraw(Vector2 pos, Vector2 prevPos, bool bForeground, uint frameBuffer,
uint texName, Size texSize, float[] sphereVertices, int scale)
{
// FIXME: radius is in image space and needs to be dps adjusted
// Setup viewport
int[] oldViewPort = new int[4];
GL.GetInteger(GetPName.Viewport, oldViewPort);
GL.Viewport(0, 0, texSize.Width, texSize.Height);
int fboOld = GLHelper.bindFrameBuffer(frameBuffer, texName);
Vector4 foreground = new Vector4(1, 1, 1, 1);
Vector4 background = new Vector4(0, 0, 0, 0);
Vector4 color = bForeground ? foreground : background;
AmbientShader shader = AmbientShader.Singleton;
shader.Use();
shader.SetColor(color);
Matrix4 ProjMatrix = Matrix4.CreateOrthographicOffCenter(0, (float)texSize.Width, 0, (float)texSize.Height, -1.0f, 1.0f);
// Draw sphere at pos
{
// Set Model view
Matrix4 MVPMatrix = Matrix4.Scale(scale) * Matrix4.CreateTranslation(new Vector3(pos)) * ProjMatrix;
shader.SetMVPMatrix(MVPMatrix);
shader.EnableVertices(2, VertexAttribPointerType.Float, false, 0, sphereVertices);
GLHelper.GetError();
GL.DrawArrays(BeginMode.TriangleFan, 0, sphereVertices.Length / 2);
shader.DisableVertices();
}
// Connect prev to current
if (!pos.Equals(prevPos))
{
shader.SetMVPMatrix(ProjMatrix);
// shader.SetMVPMatrix(projMatrix);
// Vector2 v0 = CCContext.ViewToModel(prevPos, modelViewMatrix);
// Vector2 v1 = CCContext.ViewToModel(pos, modelViewMatrix);
Vector2 v0 = prevPos;
Vector2 v1 = pos;
Vector3 up = new Vector3(0, 0, 1);
Vector3 dir = new Vector3(v1) - new Vector3(v0);
dir = Vector3.Normalize(dir);
Vector3 cross = Vector3.Cross(up, dir) * scale;
float[] vertices = new float[4 * 2];
int i = 0;
vertices[i++] = v0.X - cross.X;
vertices[i++] = v0.Y - cross.Y;
vertices[i++] = v0.X + cross.X;
vertices[i++] = v0.Y + cross.Y;
vertices[i++] = v1.X - cross.X;
vertices[i++] = v1.Y - cross.Y;
vertices[i++] = v1.X + cross.X;
vertices[i++] = v1.Y + cross.Y;
shader.EnableVertices(2, VertexAttribPointerType.Float, false, 0, vertices);
GL.DrawArrays(BeginMode.TriangleStrip, 0, 4);
// GLES20.glDrawArrays(GLES20.GL_LINE_STRIP, 0, 4);
shader.DisableVertices();
}
// unbind framebuffer
GL.BindFramebuffer(FramebufferTarget.Framebuffer, fboOld);
GL.Viewport(oldViewPort[0], oldViewPort[1], oldViewPort[2], oldViewPort[3]);
}