tibia-client/src/otclient/lightview.cpp

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/*
* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
*
* 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.
*/
#include "lightview.h"
#include "mapview.h"
#include <framework/graphics/framebuffer.h>
#include <framework/graphics/framebuffermanager.h>
#include <framework/graphics/painter.h>
#include <framework/graphics/image.h>
LightView::LightView()
{
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m_lightbuffer = g_framebuffers.createFrameBuffer();
generateLightBuble();
reset();
}
void LightView::generateLightBuble()
{
m_lightRadius = 128;
int circleDiameter = m_lightRadius * 2;
ImagePtr lightImage = ImagePtr(new Image(Size(circleDiameter, circleDiameter)));
for(int x = 0; x < circleDiameter; x++) {
for(int y = 0; y < circleDiameter; y++) {
float radius = std::sqrt((m_lightRadius - x)*(m_lightRadius - x) + (m_lightRadius - y)*(m_lightRadius - y));
float intensity = std::max((m_lightRadius-radius)/(float)m_lightRadius, 0.0f);
// light intensity varies inversely with the square of the distance
intensity = intensity * intensity;
uint8_t colorByte = intensity * 255;
uint8_t pixel[4] = {colorByte,colorByte,colorByte,255};
lightImage->setPixel(x, y, pixel);
}
}
m_lightTexture = TexturePtr(new Texture(lightImage, true));
m_lightTexture->setSmooth(true);
}
void LightView::reset()
{
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m_lightMap.clear();
}
void LightView::setGlobalLight(const Light& light)
{
m_globalLight = light;
}
void LightView::addLightSource(const Point& center, float scaleFactor, const Light& light)
{
int radius = light.intensity * m_lightRadius * scaleFactor * 0.25f;
Color color = Color::from8bit(light.color);
float brightness = 0.8f + (light.intensity/8.0f)*0.2f;
color.setRed(color.rF() * brightness);
color.setGreen(color.gF() * brightness);
color.setBlue(color.bF() * brightness);
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LightSource source;
source.center = center;
source.color = color;
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source.radius = radius;
m_lightMap.push_back(source);
}
void LightView::drawGlobalLight(const Light& light)
{
Color color = Color::from8bit(light.color);
float brightness = light.intensity / 256.0f;
color.setRed(color.rF() * brightness);
color.setGreen(color.gF() * brightness);
color.setBlue(color.bF() * brightness);
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g_painter->setColor(color);
g_painter->drawFilledRect(Rect(0,0,m_lightbuffer->getSize()));
}
void LightView::drawLightSource(const Point& center, const Color& color, int radius)
{
Rect dest = Rect(center - Point(radius, radius), Size(radius*2,radius*2));
g_painter->setColor(color);
g_painter->setCompositionMode(Painter::CompositionMode_Add);
g_painter->drawTexturedRect(dest, m_lightTexture);
// debug draw
/*
radius = 8;
g_painter->setColor(Color::black);
g_painter->setCompositionMode(Painter::CompositionMode_Replace);
g_painter->drawBoundingRect(Rect(center - Point(radius, radius), Size(radius*2,radius*2)), 4);
*/
}
void LightView::resize(const Size& size)
{
m_lightbuffer->resize(size);
}
void LightView::draw(const Rect& dest, const Rect& src)
{
g_painter->saveAndResetState();
m_lightbuffer->bind();
g_painter->setCompositionMode(Painter::CompositionMode_Replace);
drawGlobalLight(m_globalLight);
g_painter->setCompositionMode(Painter::CompositionMode_Add);
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for(const LightSource& source : m_lightMap)
drawLightSource(source.center, source.color, source.radius);
m_lightbuffer->release();
g_painter->setCompositionMode(Painter::CompositionMode_Light);
m_lightbuffer->draw(dest, src);
g_painter->restoreSavedState();
}