/// <summary>
/// Draws text into a quad batch.
/// </summary>
public void FillQuadBatch(QuadBatch quadBatch, float width, float height, string text, float size, uint color, HAlign hAlign, VAlign vAlign, bool autoScale, bool kerning)
{
List<CharLocation> charLocations = ArrangeCharsInArea(width, height, text, size, hAlign, vAlign, autoScale, kerning);
_helperImage.Color = color;
if (charLocations.Count > MAX_TEXT_CHAR_COUNT)
{
throw new InvalidDataException(string.Format("Bitmap font text is limited to {0} characters", MAX_TEXT_CHAR_COUNT));
}
CharLocation charLocation;
for (int i = 0; i < charLocations.Count; i++)
{
charLocation = charLocations[i];
_helperImage.Texture = charLocation.BitmapChar.Texture;
_helperImage.X = charLocation.X;
_helperImage.Y = charLocation.Y;
_helperImage.ScaleX = _helperImage.ScaleY = charLocation.Scale;
_helperImage.ReadjustSize();
quadBatch.AddQuad(_helperImage);
}
}
private QuadBatch RenderPasses(DisplayObject obj, RenderSupport support, bool intoCache)
{
Texture cacheTexture = null;
Stage stage = obj.Stage;
float scale = Resolution;
if (stage == null)
{
throw new InvalidOperationException("Filtered object must be on the stage.");
}
// the bounds of the object in stage coordinates
Rectangle boundsPOT;
Rectangle bounds;
CalcBounds(obj, stage, scale, !intoCache, out bounds, out boundsPOT);
if (bounds.IsEmpty())
{
DisposePassTextures();
return intoCache ? new QuadBatch() : null;
}
UpdateBuffers(boundsPOT);
UpdatePassTextures((int)boundsPOT.Width, (int)boundsPOT.Height, scale);
support.FinishQuadBatch();
support.AddDrawCalls(NumPasses);
support.PushState(Matrix.Create(), 1.0f, BlendMode.AUTO);
// save original projection matrix and render target
_projMatrix.CopyFromMatrix(support.ProjectionMatrix);
Texture previousRenderTarget = support.RenderTarget;
// use cache?
if (intoCache)
{
cacheTexture = CreateTexture((int)boundsPOT.Width, (int)boundsPOT.Height, scale);
}
// draw the original object into a texture
support.RenderTarget = _passTextures[0];
SparrowSharpApp.Context.ScissorBox = null; // we want the entire texture cleared
support.Clear();
support.BlendMode = BlendMode.NORMAL;
support.SetupOrthographicProjection(boundsPOT.Left, boundsPOT.Right, boundsPOT.Bottom, boundsPOT.Top);
obj.Render(support);
support.FinishQuadBatch();
// prepare drawing of actual filter passes
support.ApplyBlendMode(true);
support.ModelViewMatrix.Identity();
support.PushClipRect(bounds);
GL.BindBuffer (BufferTarget.ArrayBuffer, _vertexBufferName);
GL.BindBuffer (BufferTarget.ElementArrayBuffer, _indexBufferName);
GL.EnableVertexAttribArray (VertexPosID);
GL.VertexAttribPointer (VertexPosID, 2, VertexAttribPointerType.Float, false, Vertex.SIZE, (IntPtr)Vertex.POSITION_OFFSET);
GL.EnableVertexAttribArray (TexCoordsID);
GL.VertexAttribPointer (TexCoordsID, 2, VertexAttribPointerType.Float, false, Vertex.SIZE, (IntPtr)Vertex.TEXTURE_OFFSET);
// draw all passes
for (int i = 0; i < NumPasses; ++i)
{
if (i < NumPasses - 1)
{ // intermediate pass
// draw into pass texture
support.RenderTarget = PassTextureForPass(i + 1);
support.Clear();
}
else
{ // final pass
if (intoCache)
{
// draw into cache texture
support.RenderTarget = cacheTexture;
support.Clear();
}
else
{
// draw into back buffer, at original (stage) coordinates
support.RenderTarget = previousRenderTarget;
support.ProjectionMatrix = _projMatrix;
support.ModelViewMatrix.Translate(OffsetX, OffsetY);
support.BlendMode = obj.BlendMode;
support.ApplyBlendMode(true);
}
}
Texture passTexture = PassTextureForPass(i);
GL.ActiveTexture (TextureUnit.Texture0);
GL.BindTexture (TextureTarget.Texture2D, passTexture.Name);
ActivateWithPass (i, passTexture, support.MvpMatrix);
GL.DrawElements (BeginMode.Triangles, 6, DrawElementsType.UnsignedShort, IntPtr.Zero);
DeactivateWithPass(i, passTexture);
}
GL.DisableVertexAttribArray(VertexPosID);
GL.DisableVertexAttribArray(TexCoordsID);
support.PopState();
support.PopClipRect();
QuadBatch cache = null;
if (intoCache)
{
// restore support settings
support.RenderTarget = previousRenderTarget;
support.ProjectionMatrix = _projMatrix;
// Create an image containing the cache. To have a display object that contains
// the filter output in object coordinates, we wrap it in a QuadBatch: that way,
// we can modify it with a transformation matrix.
cache = new QuadBatch();
Image image = new Image(cacheTexture);
Matrix matrix = stage.TransformationMatrixToSpace(obj);
// Note: the next line was originally:
// matrix.Translate (bounds.X + OffsetX, bounds.Y + OffsetY);
// this seems like a sparrow-s bug; fix is from Starling
matrix.PrependTranslation(bounds.X + OffsetX, bounds.Top + OffsetY);
cache.AddQuad(image, 1.0f, BlendMode.AUTO, matrix);
}
return cache;
}
public static int Compile(DisplayObject displayObject, List <QuadBatch> quadBatches, int quadBatchID,
Matrix transformationMatrix, float alpha, uint blendMode)
{
bool isRootObject = false;
float objectAlpha = displayObject.Alpha;
Quad quad = displayObject is Quad ? (Quad)displayObject : null;
QuadBatch batch = displayObject is QuadBatch ? (QuadBatch)displayObject : null;
DisplayObjectContainer container = displayObject is DisplayObjectContainer ? (DisplayObjectContainer)displayObject : null;
if (quadBatchID == -1)
{
isRootObject = true;
quadBatchID = 0;
objectAlpha = 1.0f;
blendMode = displayObject.BlendMode;
if (quadBatches.Count == 0)
{
quadBatches.Add(new QuadBatch());
}
else
{
quadBatches[0].Reset();
}
}
if (container != null)
{
Matrix childMatrix = Matrix.Create();
childMatrix.Identity();
int numChildren = container.NumChildren;
for (int i = 0; i < numChildren; i++)
{
DisplayObject child = container.GetChild(i);
if (child.HasVisibleArea)
{
uint childBlendMode = child.BlendMode;
if (childBlendMode == Sparrow.Display.BlendMode.AUTO)
{
childBlendMode = blendMode;
}
childMatrix.CopyFromMatrix(transformationMatrix);
childMatrix.PrependMatrix(child.TransformationMatrix);
quadBatchID = Compile(child, quadBatches, quadBatchID, childMatrix, alpha * objectAlpha, childBlendMode);
}
}
}
else if (quad != null)
{
Texture texture = quad.Texture;
bool tinted = quad.Tinted;
bool pma = quad.PremultipliedAlpha;
QuadBatch currentBatch = quadBatches[quadBatchID];
if (currentBatch.IsStateChange(tinted, texture, alpha * objectAlpha, pma, blendMode, 1))
{
quadBatchID++;
if (quadBatches.Count <= quadBatchID)
{
quadBatches.Add(new QuadBatch());
}
currentBatch = quadBatches[quadBatchID];
currentBatch.Reset();
}
currentBatch.AddQuad(quad, alpha * objectAlpha, blendMode, transformationMatrix);
}
else if (batch != null)
{
Texture texture = quad.Texture;
bool tinted = quad.Tinted;
bool pma = quad.PremultipliedAlpha;
int numQuads = batch.NumQuads;
QuadBatch currentBatch = quadBatches[quadBatchID];
if (currentBatch.IsStateChange(tinted, texture, alpha * objectAlpha, pma, blendMode, numQuads))
{
quadBatchID++;
if (quadBatches.Count <= quadBatchID)
{
quadBatches.Add(new QuadBatch());
}
currentBatch = quadBatches[quadBatchID];
currentBatch.Reset();
}
currentBatch.AddQuadBatch(batch, alpha * objectAlpha, blendMode, transformationMatrix);
}
else
{
throw new InvalidOperationException("Unsupported display object");
}
if (!isRootObject)
{
return(quadBatchID);
}
// remove unused batches
for (int i = quadBatches.Count - 1; i > quadBatchID; --i)
{
quadBatches.RemoveAt(quadBatches.Count - 1);
}
return(quadBatchID);
}
