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carbon: use generic implementation of GradientFill for *triangle* case since carbon does not have an own implementation

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git-svn-id: trunk@38771 -
This commit is contained in:
paul 2012-09-21 03:31:13 +00:00
parent 7fb6d538c2
commit dd5f4ac615
1 changed files with 7 additions and 86 deletions
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93
lcl/interfaces/carbon/carbonwinapi.inc
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@ -2368,77 +2368,6 @@ function TCarbonWidgetSet.GradientFill(DC: HDC; Vertices: PTriVertex;
Result := (Mode and GRADIENT_FILL_RECT_V) = GRADIENT_FILL_RECT_V;
end;
function FillTriMesh(Mesh: tagGradientTriangle) : Boolean;
{
var
V1, V2, V3: tagTRIVERTEX;
C1, C2, C3: CGColorRef;
R: CGRect;
Context: CGContextRef;
Path: CGPathRef;
Shading: CGShadingRef;
ShadingFunction: CGFunctionRef;
}
begin
Result := False;
// on carbon the next gradients are availble:
// Linear gradient, Radial gradient, Axial shading, Radial shading
// look like no one can repeat exacly what GdiGradientFill do
// so for now return False but if someone later will be able to implement this
// the next code may become useful
{
with Mesh do
begin
Result :=
(Vertex1 < Cardinal(NumVertices)) and (Vertex2 >= 0) and
(Vertex2 < Cardinal(NumVertices)) and (Vertex2 >= 0) and
(Vertex3 < Cardinal(NumVertices)) and (Vertex3 >= 0);
if (Vertex1 = Vertex2) or
(Vertex1 = Vertex3) or
(Vertex2 = Vertex3) or not Result then
Exit;
V1 := Vertices[Vertex1];
V2 := Vertices[Vertex2];
V3 := Vertices[Vertex3];
Context := TCarbonDeviceContext(DC).CGContext;
CGContextSaveGState(Context);
// create a triangle path
Path := CGPathCreateMutable;
CGPathMoveToPoint(Path, nil, V1.x, V1.y);
CGPathAddLineToPoint(Path, nil, V2.x, V2.y);
CGPathAddLineToPoint(Path, nil, V3.x, V3.y);
CGPathCloseSubpath(Path);
// get a bouding box of the path
R := CGPathGetBoundingBox(Path);
// clip the context by the path
CGContextAddPath(Context, Path);
CGContextClip(Context);
// get 3 colors of Tri-Vertex
C1 := VertexToColor(V1);
C2 := VertexToColor(V2);
C3 := VertexToColor(V3);
// create axial shading
Shading := CGShadingCreateAxial(RGBColorSpace, R.origin,
CGPointMake(R.origin.x + R.size.width, R.origin.y + R.size.height),
ShadingFunction, False, False);
// draw the shading
CGContextDrawShading(Context, Shading);
CGShadingRelease(Shading);
CGFunctionRelease(ShadingFunction);
CGPathRelease(Path);
// remove the applied clipping
CGContextRestoreGState(Context);
end;
}
end;
function FillRectMesh(Mesh: tagGradientRect) : boolean;
var
TL, BR: tagTRIVERTEX;
@ -2503,7 +2432,11 @@ begin
Result := (Meshes <> nil) and (NumMeshes >= 1) and (NumVertices >= 2)
and (Vertices <> nil);
if Result and DoFillTriangle then
Result := NumVertices >= 3;
begin
Result := inherited;
Exit;
end;
if Result then
begin
Result := False;
@ -2512,22 +2445,10 @@ begin
if MemSize(Vertices) < PtrUInt(SizeOf(tagTRIVERTEX)*NumVertices) then
exit;
//Sanity Checks For Meshes Size vs. Count
if MemSize(Meshes) < PtrUInt(MeshSize[DoFillTriangle]*NumMeshes) then
exit;
for I := 0 to NumMeshes - 1 do
begin
if DoFillTriangle then
begin
if not FillTriMesh(PGradientTriangle(Meshes)[I]) then
exit;
end
else
begin
if not FillRectMesh(PGradientRect(Meshes)[I]) then
exit;
end;
if not FillRectMesh(PGradientRect(Meshes)[I]) then
exit;
end;
Result := True;
end;