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/*
* Copyright (c) 2020 - 2024 the ThorVG project. 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_H_
#define _TVG_SCENE_H_
#include <float.h>
#include "tvgPaint.h"
struct SceneIterator : Iterator
{
list<Paint*>* paints;
list<Paint*>::iterator itr;
SceneIterator(list<Paint*>* p) : paints(p)
{
begin();
}
const Paint* next() override
{
if (itr == paints->end()) return nullptr;
auto paint = *itr;
++itr;
return paint;
}
uint32_t count() override
{
return paints->size();
}
void begin() override
{
itr = paints->begin();
}
};
struct Scene::Impl
{
list<Paint*> paints;
RenderData rd = nullptr;
Scene* scene = nullptr;
uint8_t opacity; //for composition
bool needComp = false; //composite or not
Impl(Scene* s) : scene(s)
{
}
~Impl()
{
for (auto paint : paints) {
if (P(paint)->unref() == 0) delete(paint);
}
if (auto renderer = PP(scene)->renderer) {
renderer->dispose(rd);
}
}
bool needComposition(uint8_t opacity)
{
if (opacity == 0 || paints.empty()) return false;
//Masking may require composition (even if opacity == 255)
auto compMethod = scene->composite(nullptr);
if (compMethod != CompositeMethod::None && compMethod != CompositeMethod::ClipPath) return true;
//Blending may require composition (even if opacity == 255)
if (scene->blend() != BlendMethod::Normal) return true;
//Half translucent requires intermediate composition.
if (opacity == 255) return false;
//If scene has several children or only scene, it may require composition.
//OPTIMIZE: the bitmap type of the picture would not need the composition.
//OPTIMIZE: a single paint of a scene would not need the composition.
if (paints.size() == 1 && paints.front()->identifier() == TVG_CLASS_ID_SHAPE) return false;
return true;
}
RenderData update(RenderMethod* renderer, const Matrix& transform, Array<RenderData>& clips, uint8_t opacity, RenderUpdateFlag flag, TVG_UNUSED bool clipper)
{
if ((needComp = needComposition(opacity))) {
/* Overriding opacity value. If this scene is half-translucent,
It must do intermeidate composition with that opacity value. */
this->opacity = opacity;
opacity = 255;
}
for (auto paint : paints) {
paint->pImpl->update(renderer, transform, clips, opacity, flag, false);
}
return nullptr;
}
bool render(RenderMethod* renderer)
{
Compositor* cmp = nullptr;
auto ret = true;
renderer->blend(scene->blend());
if (needComp) {
cmp = renderer->target(bounds(renderer), renderer->colorSpace());
renderer->beginComposite(cmp, CompositeMethod::None, opacity);
}
for (auto paint : paints) {
ret &= paint->pImpl->render(renderer);
}
if (cmp) renderer->endComposite(cmp);
return ret;
}
RenderRegion bounds(RenderMethod* renderer) const
{
if (paints.empty()) 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) {
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, bool stroking)
{
if (paints.empty()) return false;
auto x1 = FLT_MAX;
auto y1 = FLT_MAX;
auto x2 = -FLT_MAX;
auto y2 = -FLT_MAX;
for (auto paint : paints) {
auto x = FLT_MAX;
auto y = FLT_MAX;
auto w = 0.0f;
auto h = 0.0f;
if (!P(paint)->bounds(&x, &y, &w, &h, true, stroking)) 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(Paint* ret)
{
if (ret) TVGERR("RENDERER", "TODO: duplicate()");
auto scene = Scene::gen().release();
auto dup = scene->pImpl;
for (auto paint : paints) {
auto cdup = paint->duplicate();
P(cdup)->ref();
dup->paints.push_back(cdup);
}
return scene;
}
void clear(bool free)
{
for (auto paint : paints) {
if (P(paint)->unref() == 0 && free) delete(paint);
}
paints.clear();
}
Iterator* iterator()
{
return new SceneIterator(&paints);
}
};
#endif //_TVG_SCENE_H_
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