/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can
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* be found in the LICENSE file.
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*
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*/
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//
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//
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//
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#pragma once
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//
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//
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//
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#include <stdint.h>
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//
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//
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//
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struct ts_transform_stack;
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//
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//
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//
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#if 1
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typedef float ts_transform_float_t;
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#define TS_TRANSFORM_FLOAT_SUFFIX f
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#else
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typedef double ts_transform_float_t;
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#define TS_TRANSFORM_FLOAT_SUFFIX
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#endif
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//
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//
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//
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typedef uint64_t ts_transform_weakref_t;
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#define TS_TRANSFORM_WEAKREF_INVALID UINT64_MAX;
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//
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//
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//
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typedef enum ts_transform_type
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{
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TS_TRANSFORM_TYPE_INVALID,
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TS_TRANSFORM_TYPE_AFFINE,
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TS_TRANSFORM_TYPE_PROJECTIVE
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} ts_transform_type_e;
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//
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//
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//
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struct ts_transform_stack *
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ts_transform_stack_create(const uint32_t size);
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void
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ts_transform_stack_release(struct ts_transform_stack * const ts);
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//
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//
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//
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uint32_t
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ts_transform_stack_save(struct ts_transform_stack * const ts);
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void
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ts_transform_stack_restore(struct ts_transform_stack * const ts, uint32_t const restore);
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//
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//
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//
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ts_transform_float_t *
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ts_transform_stack_top_transform(struct ts_transform_stack * const ts);
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ts_transform_weakref_t *
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ts_transform_stack_top_weakref(struct ts_transform_stack * const ts);
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//
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//
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//
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void
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ts_transform_stack_dup(struct ts_transform_stack * const ts);
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void
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ts_transform_stack_drop(struct ts_transform_stack * const ts);
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//
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//
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//
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void
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ts_transform_stack_transform_xy(struct ts_transform_stack * const ts,
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ts_transform_float_t const x,
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ts_transform_float_t const y,
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ts_transform_float_t * const xp,
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ts_transform_float_t * const yp);
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//
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//
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//
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void
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ts_transform_stack_push_matrix(struct ts_transform_stack * const ts,
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ts_transform_float_t const sx,
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ts_transform_float_t const shx,
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ts_transform_float_t const tx,
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ts_transform_float_t const shy,
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ts_transform_float_t const sy,
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ts_transform_float_t const ty,
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ts_transform_float_t const w0,
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ts_transform_float_t const w1,
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ts_transform_float_t const w2);
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void
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ts_transform_stack_push_identity(struct ts_transform_stack * const ts);
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void
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ts_transform_stack_push_affine(struct ts_transform_stack * const ts,
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ts_transform_float_t const sx,
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ts_transform_float_t const shx,
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ts_transform_float_t const tx,
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ts_transform_float_t const shy,
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ts_transform_float_t const sy,
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ts_transform_float_t const ty);
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void
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ts_transform_stack_push_translate(struct ts_transform_stack * const ts,
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ts_transform_float_t const tx,
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ts_transform_float_t const ty);
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void
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ts_transform_stack_push_scale(struct ts_transform_stack * const ts,
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ts_transform_float_t const sx,
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ts_transform_float_t const sy);
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void
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ts_transform_stack_push_shear(struct ts_transform_stack * const ts,
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ts_transform_float_t const shx,
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ts_transform_float_t const shy);
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void
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ts_transform_stack_push_skew_x(struct ts_transform_stack * const ts,
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ts_transform_float_t const theta);
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void
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ts_transform_stack_push_skew_y(struct ts_transform_stack * const ts,
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ts_transform_float_t const theta);
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void
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ts_transform_stack_push_rotate(struct ts_transform_stack * const ts,
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ts_transform_float_t const theta);
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void
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ts_transform_stack_push_rotate_xy2(struct ts_transform_stack * const ts,
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ts_transform_float_t const theta,
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ts_transform_float_t const cx,
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ts_transform_float_t const cy,
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ts_transform_float_t const tx,
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ts_transform_float_t const ty);
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void
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ts_transform_stack_push_rotate_xy(struct ts_transform_stack * const ts,
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ts_transform_float_t const theta,
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ts_transform_float_t const cx,
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ts_transform_float_t const cy);
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void
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ts_transform_stack_push_rotate_scale_xy(struct ts_transform_stack * const ts,
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ts_transform_float_t const theta,
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ts_transform_float_t const sx,
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ts_transform_float_t const sy,
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ts_transform_float_t const cx,
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ts_transform_float_t const cy);
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//
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// Quadrilateral coordinates are ts_transform_float_t2 structs:
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//
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// float2[4] = { xy0, xy1, xy2, xy3 }
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//
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// -or-
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//
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// float[8] = { x0, y0, x1, y1, x2, y2, x3, y3 };
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//
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ts_transform_type_e
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ts_transform_stack_push_quad_to_unit(struct ts_transform_stack * const ts,
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ts_transform_float_t const quad[8]);
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ts_transform_type_e
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ts_transform_stack_push_unit_to_quad(struct ts_transform_stack * const ts,
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ts_transform_float_t const quad[8]);
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ts_transform_type_e
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ts_transform_stack_push_quad_to_quad(struct ts_transform_stack * const ts,
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ts_transform_float_t const quad_src[8],
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ts_transform_float_t const quad_dst[8]);
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ts_transform_type_e
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ts_transform_stack_push_rect_to_quad(struct ts_transform_stack * const ts,
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ts_transform_float_t const x0,
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ts_transform_float_t const y0,
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ts_transform_float_t const x1,
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ts_transform_float_t const y1,
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ts_transform_float_t const quad_dst[8]);
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//
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// The second matrix on the stack (TOS[-1]) is post-multiplied by the
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// top matrix on the stack (TOS[0]).
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//
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// The result replaces TOS[0] and TOS[-1] is unmodified.
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//
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// The stack effect of concat is:
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//
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// | B | | A*B |
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// | A | | A |
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// | . | => | . |
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// | . | | . |
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// | . | | . |
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//
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void
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ts_transform_stack_concat(struct ts_transform_stack * const ts);
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//
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// The second matrix on the stack (TOS[-1]) is post-multiplied by the
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// top matrix on the stack (TOS[0]).
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//
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// The result replaces both matrices.
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//
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// The stack effect of multiply is:
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//
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// | B | | A*B |
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// | A | | . |
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// | . | => | . |
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// | . | | . |
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// | . | | . |
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//
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void
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ts_transform_stack_multiply(struct ts_transform_stack * const ts);
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//
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//
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//
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