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56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "gtypes.h"
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// For arc/radial fill algorithms
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#define QUADRANTS_NUM 4 // Just in case of fluctuation
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#define QUADRANT_ANGLE (TRIG_MAX_ANGLE / QUADRANTS_NUM)
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static GCornerMask radius_quadrants[QUADRANTS_NUM] =
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{ GCornerTopRight, GCornerBottomRight, GCornerBottomLeft, GCornerTopLeft };
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typedef struct {
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int32_t angle;
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GCornerMask quadrant;
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} EllipsisPartDrawConfig;
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typedef struct {
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EllipsisPartDrawConfig start_quadrant;
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GCornerMask full_quadrants;
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EllipsisPartDrawConfig end_quadrant;
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} EllipsisDrawConfig;
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typedef struct {
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GCornerMask mask;
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int8_t x_mul;
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int8_t y_mul;
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} GCornerMultiplier;
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static GCornerMultiplier quadrant_mask_mul[] = {
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{GCornerTopRight, 1, -1},
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{GCornerBottomRight, 1, 1},
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{GCornerBottomLeft, -1, 1},
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{GCornerTopLeft, -1, -1}
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};
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T_STATIC EllipsisDrawConfig prv_calc_draw_config_ellipsis(int32_t angle_start, int32_t angle_end);
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void prv_fill_oval_quadrant(GContext *ctx, GPoint point,
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uint16_t outer_radius_x, uint16_t outer_radius_y,
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uint16_t inner_radius_x, uint16_t inner_radius_y,
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GCornerMask quadrant);
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