private static MeshBuilder.ClipCounts UpperBoundApproximateRectClippingResults(Vertex[] vertices, ushort[] indices, Vector4 clipRectMinMax)
{
MeshBuilder.ClipCounts clipCounts = default(MeshBuilder.ClipCounts);
clipCounts.firstClippedIndex = 2147483647;
clipCounts.firstDegenerateIndex = -1;
clipCounts.lastClippedIndex = -1;
int num = indices.Length;
for (int i = 0; i < num; i += 3)
{
Vector3 position = vertices[(int)indices[i]].position;
Vector3 position2 = vertices[(int)indices[i + 1]].position;
Vector3 position3 = vertices[(int)indices[i + 2]].position;
Vector4 vector;
vector.x = ((position.x < position2.x) ? position.x : position2.x);
vector.x = ((vector.x < position3.x) ? vector.x : position3.x);
vector.y = ((position.y < position2.y) ? position.y : position2.y);
vector.y = ((vector.y < position3.y) ? vector.y : position3.y);
vector.z = ((position.x > position2.x) ? position.x : position2.x);
vector.z = ((vector.z > position3.x) ? vector.z : position3.x);
vector.w = ((position.y > position2.y) ? position.y : position2.y);
vector.w = ((vector.w > position3.y) ? vector.w : position3.y);
bool flag = vector.x >= clipRectMinMax.x && vector.z <= clipRectMinMax.z && vector.y >= clipRectMinMax.y && vector.w <= clipRectMinMax.w;
if (flag)
{
clipCounts.firstDegenerateIndex = -1;
}
else
{
clipCounts.firstClippedIndex = ((clipCounts.firstClippedIndex < i) ? clipCounts.firstClippedIndex : i);
clipCounts.lastClippedIndex = i + 2;
bool flag2 = vector.x >= clipRectMinMax.z || vector.z <= clipRectMinMax.x || vector.y >= clipRectMinMax.w || vector.w <= clipRectMinMax.y;
if (flag2)
{
clipCounts.firstDegenerateIndex = ((clipCounts.firstDegenerateIndex == -1) ? i : clipCounts.firstDegenerateIndex);
clipCounts.degenerateTriangles++;
}
clipCounts.firstDegenerateIndex = -1;
clipCounts.clippedTriangles++;
clipCounts.addedTriangles += 4;
}
}
return(clipCounts);
}
private unsafe static void RectClip(Vertex[] vertices, ushort[] indices, Vector4 clipRectMinMax, MeshWriteData mwd, MeshBuilder.ClipCounts cc, ref int newVertexCount)
{
int num = cc.lastClippedIndex;
bool flag = cc.firstDegenerateIndex != -1 && cc.firstDegenerateIndex < num;
if (flag)
{
num = cc.firstDegenerateIndex;
}
ushort num2 = (ushort)vertices.Length;
for (int i = 0; i < cc.firstClippedIndex; i++)
{
mwd.SetNextIndex(indices[i]);
}
ushort *ptr = stackalloc ushort[3];
Vertex *ptr2 = stackalloc Vertex[3];
for (int j = cc.firstClippedIndex; j < num; j += 3)
{
*ptr = indices[j];
ptr[1] = indices[j + 1];
ptr[2] = indices[j + 2];
*ptr2 = vertices[(int)(*ptr)];
ptr2[1] = vertices[(int)ptr[1]];
ptr2[2] = vertices[(int)ptr[2]];
Vector4 vector;
vector.x = ((ptr2->position.x < ptr2[1].position.x) ? ptr2->position.x : ptr2[1].position.x);
vector.x = ((vector.x < ptr2[2].position.x) ? vector.x : ptr2[2].position.x);
vector.y = ((ptr2->position.y < ptr2[1].position.y) ? ptr2->position.y : ptr2[1].position.y);
vector.y = ((vector.y < ptr2[2].position.y) ? vector.y : ptr2[2].position.y);
vector.z = ((ptr2->position.x > ptr2[1].position.x) ? ptr2->position.x : ptr2[1].position.x);
vector.z = ((vector.z > ptr2[2].position.x) ? vector.z : ptr2[2].position.x);
vector.w = ((ptr2->position.y > ptr2[1].position.y) ? ptr2->position.y : ptr2[1].position.y);
vector.w = ((vector.w > ptr2[2].position.y) ? vector.w : ptr2[2].position.y);
bool flag2 = vector.x >= clipRectMinMax.x && vector.z <= clipRectMinMax.z && vector.y >= clipRectMinMax.y && vector.w <= clipRectMinMax.w;
if (flag2)
{
mwd.SetNextIndex(*ptr);
mwd.SetNextIndex(ptr[1]);
mwd.SetNextIndex(ptr[2]);
}
else
{
bool flag3 = vector.x >= clipRectMinMax.z || vector.z <= clipRectMinMax.x || vector.y >= clipRectMinMax.w || vector.w <= clipRectMinMax.y;
if (!flag3)
{
MeshBuilder.RectClipTriangle(ptr2, ptr, clipRectMinMax, mwd, ref num2);
}
}
}
int num3 = indices.Length;
for (int k = cc.lastClippedIndex + 1; k < num3; k++)
{
mwd.SetNextIndex(indices[k]);
}
newVertexCount = (int)num2;
mwd.m_Vertices = mwd.m_Vertices.Slice(0, newVertexCount);
mwd.m_Indices = mwd.m_Indices.Slice(0, mwd.currentIndex);
}
internal static void MakeVectorGraphicsStretchBackground(Vertex[] svgVertices, ushort[] svgIndices, float svgWidth, float svgHeight, Rect targetRect, Rect sourceUV, ScaleMode scaleMode, Color tint, int settingIndexOffset, MeshBuilder.AllocMeshData meshAlloc, out int finalVertexCount, out int finalIndexCount)
{
Vector2 vector = new Vector2(svgWidth * sourceUV.width, svgHeight * sourceUV.height);
Vector2 vector2 = new Vector2(sourceUV.xMin * svgWidth, sourceUV.yMin * svgHeight);
Rect rect = new Rect(vector2, vector);
bool flag = sourceUV.xMin != 0f || sourceUV.yMin != 0f || sourceUV.width != 1f || sourceUV.height != 1f;
float num = vector.x / vector.y;
float num2 = targetRect.width / targetRect.height;
Vector2 vector3;
Vector2 vector4;
switch (scaleMode)
{
case ScaleMode.StretchToFill:
vector3 = new Vector2(0f, 0f);
vector4.x = targetRect.width / vector.x;
vector4.y = targetRect.height / vector.y;
break;
case ScaleMode.ScaleAndCrop:
{
vector3 = new Vector2(0f, 0f);
bool flag2 = num2 > num;
if (flag2)
{
vector4.x = (vector4.y = targetRect.width / vector.x);
float num3 = targetRect.height / vector4.y;
float num4 = rect.height / 2f - num3 / 2f;
vector3.y -= num4 * vector4.y;
rect.y += num4;
rect.height = num3;
flag = true;
}
else
{
bool flag3 = num2 < num;
if (flag3)
{
vector4.x = (vector4.y = targetRect.height / vector.y);
float num5 = targetRect.width / vector4.x;
float num6 = rect.width / 2f - num5 / 2f;
vector3.x -= num6 * vector4.x;
rect.x += num6;
rect.width = num5;
flag = true;
}
else
{
vector4.x = (vector4.y = targetRect.width / vector.x);
}
}
break;
}
case ScaleMode.ScaleToFit:
{
bool flag4 = num2 > num;
if (flag4)
{
vector4.x = (vector4.y = targetRect.height / vector.y);
vector3.x = (targetRect.width - vector.x * vector4.x) * 0.5f;
vector3.y = 0f;
}
else
{
vector4.x = (vector4.y = targetRect.width / vector.x);
vector3.x = 0f;
vector3.y = (targetRect.height - vector.y * vector4.y) * 0.5f;
}
break;
}
default:
throw new NotImplementedException();
}
MeshBuilder.s_VectorGraphicsStretch.Begin();
vector3 -= vector2 * vector4;
int num7 = svgVertices.Length;
int num8 = svgIndices.Length;
MeshBuilder.ClipCounts clipCounts = default(MeshBuilder.ClipCounts);
Vector4 zero = Vector4.zero;
bool flag5 = flag;
if (flag5)
{
bool flag6 = rect.width <= 0f || rect.height <= 0f;
if (flag6)
{
finalVertexCount = (finalIndexCount = 0);
MeshBuilder.s_VectorGraphicsStretch.End();
return;
}
zero = new Vector4(rect.xMin, rect.yMin, rect.xMax, rect.yMax);
clipCounts = MeshBuilder.UpperBoundApproximateRectClippingResults(svgVertices, svgIndices, zero);
num7 += clipCounts.clippedTriangles * 6;
num8 += clipCounts.addedTriangles * 3;
num8 -= clipCounts.degenerateTriangles * 3;
}
MeshWriteData meshWriteData = meshAlloc.alloc((uint)num7, (uint)num8, ref meshAlloc);
bool flag7 = flag;
if (flag7)
{
MeshBuilder.RectClip(svgVertices, svgIndices, zero, meshWriteData, clipCounts, ref num7);
}
else
{
meshWriteData.SetAllIndices(svgIndices);
}
Debug.Assert(meshWriteData.currentVertex == 0);
Rect uvRegion = meshWriteData.uvRegion;
int num9 = svgVertices.Length;
for (int i = 0; i < num9; i++)
{
Vertex vertex = svgVertices[i];
vertex.position.x = vertex.position.x * vector4.x + vector3.x;
vertex.position.y = vertex.position.y * vector4.y + vector3.y;
vertex.uv.x = vertex.uv.x * uvRegion.width + uvRegion.xMin;
vertex.uv.y = vertex.uv.y * uvRegion.height + uvRegion.yMin;
vertex.tint *= tint;
uint num10 = (uint)(((int)vertex.opacityPageSVGSettingIndex.b << 8 | (int)vertex.opacityPageSVGSettingIndex.a) + settingIndexOffset);
vertex.opacityPageSVGSettingIndex.b = (byte)(num10 >> 8);
vertex.opacityPageSVGSettingIndex.a = (byte)num10;
meshWriteData.SetNextVertex(vertex);
}
for (int j = num9; j < num7; j++)
{
Vertex vertex2 = meshWriteData.m_Vertices[j];
vertex2.position.x = vertex2.position.x * vector4.x + vector3.x;
vertex2.position.y = vertex2.position.y * vector4.y + vector3.y;
vertex2.uv.x = vertex2.uv.x * uvRegion.width + uvRegion.xMin;
vertex2.uv.y = vertex2.uv.y * uvRegion.height + uvRegion.yMin;
vertex2.tint *= tint;
uint num11 = (uint)(((int)vertex2.opacityPageSVGSettingIndex.b << 8 | (int)vertex2.opacityPageSVGSettingIndex.a) + settingIndexOffset);
vertex2.opacityPageSVGSettingIndex.b = (byte)(num11 >> 8);
vertex2.opacityPageSVGSettingIndex.a = (byte)num11;
meshWriteData.SetNextVertex(vertex2);
}
finalVertexCount = meshWriteData.vertexCount;
finalIndexCount = meshWriteData.indexCount;
MeshBuilder.s_VectorGraphicsStretch.End();
}