| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can |
| * be found in the LICENSE file. |
| * |
| */ |
| |
| // |
| // |
| // |
| |
| #pragma once |
| |
| // |
| // |
| // |
| |
| #include <skc/skc.h> |
| |
| // |
| // |
| // |
| |
| #if 1 |
| typedef float skc_transform_float_t; |
| #define SKC_TRANSFORM_FLOAT_SUFFIX f |
| #else |
| typedef double skc_transform_float_t; |
| #define SKC_TRANSFORM_FLOAT_SUFFIX |
| #endif |
| |
| // |
| // |
| // |
| |
| struct skc_transform_stack; |
| |
| // |
| // |
| // |
| |
| struct skc_transform_stack * |
| skc_transform_stack_create(const uint32_t size); |
| |
| void |
| skc_transform_stack_release(struct skc_transform_stack * const ts); |
| |
| // |
| // |
| // |
| |
| uint32_t |
| skc_transform_stack_save(struct skc_transform_stack * const ts); |
| |
| void |
| skc_transform_stack_restore(struct skc_transform_stack * const ts, uint32_t const restore); |
| |
| // |
| // |
| // |
| |
| skc_transform_float_t * |
| skc_transform_stack_top_transform(struct skc_transform_stack * const ts); |
| |
| skc_transform_weakref_t * |
| skc_transform_stack_top_weakref(struct skc_transform_stack * const ts); |
| |
| // |
| // |
| // |
| |
| void |
| skc_transform_stack_drop(struct skc_transform_stack * const ts); |
| |
| void |
| skc_transform_stack_dup(struct skc_transform_stack * const ts); |
| |
| // |
| // |
| // |
| |
| void |
| skc_transform_stack_transform_affine(struct skc_transform_stack * const ts, |
| skc_transform_float_t const x_pre, |
| skc_transform_float_t const y_pre, |
| skc_transform_float_t * const x_post, |
| skc_transform_float_t * const y_post); |
| |
| // |
| // |
| // |
| |
| void |
| skc_transform_stack_push_matrix(struct skc_transform_stack * const ts, |
| skc_transform_float_t const sx, |
| skc_transform_float_t const shx, |
| skc_transform_float_t const tx, |
| skc_transform_float_t const shy, |
| skc_transform_float_t const sy, |
| skc_transform_float_t const ty, |
| skc_transform_float_t const w0, |
| skc_transform_float_t const w1, |
| skc_transform_float_t const w2); |
| |
| void |
| skc_transform_stack_push_identity(struct skc_transform_stack * const ts); |
| |
| void |
| skc_transform_stack_push_affine(struct skc_transform_stack * const ts, |
| skc_transform_float_t const sx, |
| skc_transform_float_t const shx, |
| skc_transform_float_t const tx, |
| skc_transform_float_t const shy, |
| skc_transform_float_t const sy, |
| skc_transform_float_t const ty); |
| |
| void |
| skc_transform_stack_push_translate(struct skc_transform_stack * const ts, |
| skc_transform_float_t const tx, |
| skc_transform_float_t const ty); |
| |
| void |
| skc_transform_stack_push_scale(struct skc_transform_stack * const ts, |
| skc_transform_float_t const sx, |
| skc_transform_float_t const sy); |
| |
| void |
| skc_transform_stack_push_shear(struct skc_transform_stack * const ts, |
| skc_transform_float_t const shx, |
| skc_transform_float_t const shy); |
| |
| |
| void |
| skc_transform_stack_push_skew_x(struct skc_transform_stack * const ts, |
| skc_transform_float_t const theta); |
| |
| void |
| skc_transform_stack_push_skew_y(struct skc_transform_stack * const ts, |
| skc_transform_float_t const theta); |
| |
| void |
| skc_transform_stack_push_rotate(struct skc_transform_stack * const ts, |
| skc_transform_float_t const theta); |
| |
| void |
| skc_transform_stack_push_rotate_xy2(struct skc_transform_stack * const ts, |
| skc_transform_float_t const theta, |
| skc_transform_float_t const cx, |
| skc_transform_float_t const cy, |
| skc_transform_float_t const tx, |
| skc_transform_float_t const ty); |
| |
| void |
| skc_transform_stack_push_rotate_xy(struct skc_transform_stack * const ts, |
| skc_transform_float_t const theta, |
| skc_transform_float_t const cx, |
| skc_transform_float_t const cy); |
| |
| void |
| skc_transform_stack_push_rotate_scale_xy(struct skc_transform_stack * const ts, |
| skc_transform_float_t const theta, |
| skc_transform_float_t const sx, |
| skc_transform_float_t const sy, |
| skc_transform_float_t const cx, |
| skc_transform_float_t const cy); |
| // |
| // Quadrilateral coordinates are skc_transform_float_t2 structs: |
| // |
| // float2[4] = { xy0, xy1, xy2, xy3 } |
| // |
| // -or- |
| // |
| // float[8] = { x0, y0, x1, y1, x2, y2, x3, y3 }; |
| // |
| |
| bool |
| skc_transform_stack_push_quad_to_unit(struct skc_transform_stack * const ts, |
| float const quad_src[8]); |
| |
| bool |
| skc_transform_stack_push_unit_to_quad(struct skc_transform_stack * const ts, |
| float const quad_dst[8]); |
| |
| bool |
| skc_transform_stack_push_rect_to_quad(struct skc_transform_stack * const ts, |
| float const x0, |
| float const y0, |
| float const x1, |
| float const y1, |
| float const quad_dst[8]); |
| |
| bool |
| skc_transform_stack_push_quad_to_quad(struct skc_transform_stack * const ts, |
| float const quad_src[8], |
| float const quad_dst[8]); |
| |
| // |
| // |
| // |
| |
| void |
| skc_transform_stack_concat(struct skc_transform_stack * const ts); |
| |
| // |
| // |
| // |
| |
