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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_GFX_WPF_GPU_RASTER_H
#define MOZILLA_GFX_WPF_GPU_RASTER_H
#include <stddef.h>
#include <stdint.h>
namespace WGR {
enum class FillMode { EvenOdd, Winding };
struct PathBuilder;
struct Point {
int32_t x;
int32_t y;
};
constexpr uint8_t PathPointTypeStart = 0;
constexpr uint8_t PathPointTypeLine = 1;
constexpr uint8_t PathPointTypeBezier = 3;
constexpr uint8_t PathPointTypePathTypeMask = 0x07;
constexpr uint8_t PathPointTypeCloseSubpath = 0x80;
struct Path {
FillMode fill_mode;
const Point* points;
size_t num_points;
const uint8_t* types;
size_t num_types;
};
struct OutputVertex {
float x;
float y;
float coverage;
};
struct VertexBuffer {
OutputVertex* data;
size_t len;
};
extern "C" {
PathBuilder* wgr_new_builder();
void wgr_builder_reset(PathBuilder* pb);
void wgr_builder_move_to(PathBuilder* pb, float x, float y);
void wgr_builder_line_to(PathBuilder* pb, float x, float y);
void wgr_builder_curve_to(PathBuilder* pb, float c1x, float c1y, float c2x,
float c2y, float x, float y);
void wgr_builder_quad_to(PathBuilder* pb, float cx, float cy, float x, float y);
void wgr_builder_close(PathBuilder* pb);
void wgr_builder_set_fill_mode(PathBuilder* pb, FillMode fill_mode);
Path wgr_builder_get_path(PathBuilder* pb);
VertexBuffer wgr_path_rasterize_to_tri_list(
const Path* p, int32_t clip_x, int32_t clip_y, int32_t clip_width,
int32_t clip_height, bool need_inside = true, bool need_outside = false,
bool rasterization_truncates = false, OutputVertex* output_ptr = nullptr,
size_t output_capacity = 0);
void wgr_path_release(Path p);
void wgr_vertex_buffer_release(VertexBuffer vb);
void wgr_builder_release(PathBuilder* pb);
};
} // namespace WGR
#endif // MOZILLA_GFX_WPF_GPU_RASTER_H
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