| /* |
| * Copyright 2020 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkData.h" |
| #include "include/core/SkPicture.h" |
| #include "include/core/SkPictureRecorder.h" |
| |
| #include <cmath> |
| |
| struct Info { |
| float fNear = 0.05f; |
| float fFar = 4; |
| float fAngle = SK_ScalarPI / 4; |
| |
| SkV3 fEye { 0, 0, 1.0f/std::tan(fAngle/2) - 1 }; |
| SkV3 fCOA { 0, 0, 0 }; |
| SkV3 fUp { 0, 1, 0 }; |
| }; |
| |
| static SkM44 inv(const SkM44& m) { |
| SkM44 inverse(SkM44::kUninitialized_Constructor); |
| if (!m.invert(&inverse)) { |
| inverse.setIdentity(); |
| } |
| return inverse; |
| } |
| |
| static SkM44 make_ctm(const Info& info, const SkM44& model, SkSize size) { |
| SkM44 camera, perspective, viewport; |
| |
| SkScalar w = size.width(); |
| SkScalar h = size.height(); |
| |
| perspective = SkM44::Perspective(info.fNear, info.fFar, info.fAngle); |
| camera = SkM44::LookAt(info.fEye, info.fCOA, info.fUp); |
| viewport.setScale(w*0.5f, h*0.5f, 1);//.postTranslate(r.centerX(), r.centerY(), 0); |
| |
| return viewport * perspective * camera * model * inv(viewport); |
| } |
| |
| static void do_draw(SkCanvas* canvas, SkColor color) { |
| SkAutoCanvasRestore acr(canvas, true); |
| |
| Info info; |
| |
| SkM44 m = SkM44::Rotate({0, 1, 0}, SK_ScalarPI/6); |
| |
| canvas->concat(make_ctm(info, m, {300, 300})); |
| |
| canvas->translate(150, 150); |
| SkPaint paint; |
| paint.setColor(color); |
| canvas->drawRect({-100, -100, 100, 100}, paint); |
| } |
| |
| /* |
| * Test calling drawables w/ translate and matrices |
| */ |
| DEF_SIMPLE_GM(sk3d_simple, real_canvas, 300, 300) { |
| do_draw(real_canvas, 0xFFFF0000); |
| |
| SkPictureRecorder recorder; |
| SkCanvas* canvas = recorder.beginRecording(300, 300); |
| |
| do_draw(canvas, 0x880000FF); |
| |
| auto pic = recorder.finishRecordingAsPicture(); |
| real_canvas->drawPicture(pic); |
| } |