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/*
* Copyright (c) 2020 - 2022 Samsung Electronics Co., Ltd. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _TVG_SCENE_IMPL_H_
#define _TVG_SCENE_IMPL_H_
#include <float.h>
#include "tvgPaint.h"
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
struct SceneIterator : Iterator
{
Array<Paint*>* paints;
uint32_t idx = 0;
SceneIterator(Array<Paint*>* p) : paints(p)
{
}
const Paint* next() override
{
if (idx >= paints->count) return nullptr;
return paints->data[idx++];
}
uint32_t count() override
{
return paints->count;
}
void begin() override
{
idx = 0;
}
};
struct Scene::Impl
{
Array<Paint*> paints;
uint8_t opacity; //for composition
RenderMethod* renderer = nullptr; //keep it for explicit clear
~Impl()
{
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
delete(*paint);
}
}
bool dispose(RenderMethod& renderer)
{
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
(*paint)->pImpl->dispose(renderer);
}
this->renderer = nullptr;
return true;
}
bool needComposition(uint32_t opacity)
{
//Half translucent requires intermediate composition.
if (opacity == 255 || opacity == 0) return false;
//If scene has several children or only scene, it may require composition.
if (paints.count > 1) return true;
if (paints.count == 1 && (*paints.data)->identifier() == TVG_CLASS_ID_SCENE) return true;
return false;
}
void* update(RenderMethod &renderer, const RenderTransform* transform, uint32_t opacity, Array<RenderData>& clips, RenderUpdateFlag flag)
{
/* Overriding opacity value. If this scene is half-translucent,
It must do intermeidate composition with that opacity value. */
this->opacity = static_cast<uint8_t>(opacity);
if (needComposition(opacity)) opacity = 255;
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
(*paint)->pImpl->update(renderer, transform, opacity, clips, static_cast<uint32_t>(flag));
}
/* FXIME: it requires to return list of children engine data
This is necessary for scene composition */
this->renderer = &renderer;
return nullptr;
}
bool render(RenderMethod& renderer)
{
Compositor* cmp = nullptr;
if (needComposition(opacity)) {
cmp = renderer.target(bounds(renderer));
renderer.beginComposite(cmp, CompositeMethod::None, opacity);
}
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
if (!(*paint)->pImpl->render(renderer)) return false;
}
if (cmp) renderer.endComposite(cmp);
return true;
}
RenderRegion bounds(RenderMethod& renderer) const
{
if (paints.count == 0) return {0, 0, 0, 0};
int32_t x1 = INT32_MAX;
int32_t y1 = INT32_MAX;
int32_t x2 = 0;
int32_t y2 = 0;
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
auto region = (*paint)->pImpl->bounds(renderer);
//Merge regions
if (region.x < x1) x1 = region.x;
if (x2 < region.x + region.w) x2 = (region.x + region.w);
if (region.y < y1) y1 = region.y;
if (y2 < region.y + region.h) y2 = (region.y + region.h);
}
return {x1, y1, (x2 - x1), (y2 - y1)};
}
bool bounds(float* px, float* py, float* pw, float* ph)
{
if (paints.count == 0) return false;
auto x1 = FLT_MAX;
auto y1 = FLT_MAX;
auto x2 = -FLT_MAX;
auto y2 = -FLT_MAX;
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
auto x = FLT_MAX;
auto y = FLT_MAX;
auto w = 0.0f;
auto h = 0.0f;
if ((*paint)->bounds(&x, &y, &w, &h, true) != tvg::Result::Success) continue;
//Merge regions
if (x < x1) x1 = x;
if (x2 < x + w) x2 = (x + w);
if (y < y1) y1 = y;
if (y2 < y + h) y2 = (y + h);
}
if (px) *px = x1;
if (py) *py = y1;
if (pw) *pw = (x2 - x1);
if (ph) *ph = (y2 - y1);
return true;
}
Paint* duplicate()
{
auto ret = Scene::gen();
auto dup = ret.get()->pImpl;
dup->paints.reserve(paints.count);
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
dup->paints.push((*paint)->duplicate());
}
return ret.release();
}
void clear(bool free)
{
auto dispose = renderer ? true : false;
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
if (dispose) (*paint)->pImpl->dispose(*renderer);
if (free) delete(*paint);
}
paints.clear();
renderer = nullptr;
}
Iterator* iterator()
{
return new SceneIterator(&paints);
}
};
#endif //_TVG_SCENE_IMPL_H_
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