chromium/third_party/skia/src/text/gpu/VertexFiller.h

/*
* Copyright 2023 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef sktext_gpu_VertexFiller_DEFINED
#define sktext_gpu_VertexFiller_DEFINED

#include "include/core/SkMatrix.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSpan.h"
#include "include/core/SkTypes.h"
#include "include/private/base/SkTLogic.h"
#include "src/base/SkVx.h"

#include <optional>
#include <tuple>

class SkReadBuffer;
class SkWriteBuffer;

#if defined(SK_GANESH) || defined(SK_USE_LEGACY_GANESH_TEXT_APIS)
#include "src/gpu/ganesh/GrColor.h"
#include "src/gpu/ganesh/ops/AtlasTextOp.h"

#include <cstddef>
#endif  // defined(SK_GANESH) || defined(SK_USE_LEGACY_GANESH_TEXT_APIS)

namespace skgpu {
enum class MaskFormat : int;

namespace graphite {
class DrawWriter;
class Rect;
class Transform;
}
}

namespace sktext::gpu {
class Glyph;
class SubRunAllocator;

enum FillerType { … };

// -- VertexFiller ---------------------------------------------------------------------------------
// The VertexFiller assumes that all points, glyph atlas entries, and bounds are created with
// respect to the CreationMatrix. This assumes that mapping any point, mask or bounds through the
// CreationMatrix will result in the proper device position. In order to draw using an arbitrary
// PositionMatrix, calculate a
//
//    viewDifference = [PositionMatrix] * [CreationMatrix] ^ -1.
//
// The viewDifference is used to map all points, masks and bounds to position to the device
// respecting the PositionMatrix.
class VertexFiller { … };

}  // namespace sktext::gpu

#endif