clean up inversion.

Author: jonahwilliams

impeller/aiks/canvas.cc

@@ -940,7 +940,7 @@ void Canvas::DrawVertices(const std::shared_ptr<VerticesGeometry>& vertices,
       contents->SetAlpha(paint.color.alpha);
       contents->SetGeometry(vertices);
 
-      contents->SetEffectTransform(image_data.effect_transform.Invert());
+      contents->SetEffectTransform(image_data.effect_transform);
       contents->SetTexture(image_data.texture);
       contents->SetTileMode(image_data.x_tile_mode, image_data.y_tile_mode);
 

impeller/entity/contents/vertices_contents.cc

@@ -268,7 +268,7 @@ void VerticesSimpleBlendContents::SetTileMode(Entity::TileMode tile_mode_x,
 }
 
 void VerticesSimpleBlendContents::SetEffectTransform(Matrix transform) {
-  effect_transform_ = transform;
+  inverse_matrix_ = transform.Invert();
 }
 
 bool VerticesSimpleBlendContents::Render(const ContentContext& renderer,
@@ -282,7 +282,7 @@ bool VerticesSimpleBlendContents::Render(const ContentContext& renderer,
   using FS = PorterDuffBlendPipeline::FragmentShader;
 
   GeometryResult geometry_result = geometry_->GetPositionUVColorBuffer(
-      Rect::MakeSize(texture_->GetSize()), effect_transform_, renderer, entity,
+      Rect::MakeSize(texture_->GetSize()), inverse_matrix_, renderer, entity,
       pass);
   if (geometry_result.vertex_buffer.vertex_count == 0) {
     return true;

impeller/entity/contents/vertices_contents.h

@@ -146,7 +146,7 @@ class VerticesSimpleBlendContents final : public Contents {
   SamplerDescriptor descriptor_ = {};
   Entity::TileMode tile_mode_x_ = Entity::TileMode::kClamp;
   Entity::TileMode tile_mode_y_ = Entity::TileMode::kClamp;
-  Matrix effect_transform_ = {};
+  Matrix inverse_matrix_ = {};
 
   VerticesSimpleBlendContents(const VerticesSimpleBlendContents&) = delete;