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136 lines
4.6 KiB
136 lines
4.6 KiB
/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "lightview.h"
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#include "mapview.h"
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#include <framework/graphics/framebuffer.h>
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#include <framework/graphics/framebuffermanager.h>
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#include <framework/graphics/painter.h>
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#include <framework/graphics/image.h>
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LightView::LightView()
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{
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m_lightbuffer = g_framebuffers.createFrameBuffer();
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generateLightBuble();
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reset();
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}
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void LightView::generateLightBuble()
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{
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m_lightRadius = 128;
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int circleDiameter = m_lightRadius * 2;
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ImagePtr lightImage = ImagePtr(new Image(Size(circleDiameter, circleDiameter)));
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for(int x = 0; x < circleDiameter; x++) {
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for(int y = 0; y < circleDiameter; y++) {
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float radius = std::sqrt((m_lightRadius - x)*(m_lightRadius - x) + (m_lightRadius - y)*(m_lightRadius - y));
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float intensity = std::max((m_lightRadius-radius)/(float)m_lightRadius, 0.0f);
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// light intensity varies inversely with the square of the distance
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intensity = intensity * intensity;
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uint8_t colorByte = intensity * 255;
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uint8_t pixel[4] = {colorByte,colorByte,colorByte,255};
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lightImage->setPixel(x, y, pixel);
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}
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}
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m_lightTexture = TexturePtr(new Texture(lightImage, true));
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m_lightTexture->setSmooth(true);
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}
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void LightView::reset()
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{
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m_lightMap.clear();
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}
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void LightView::setGlobalLight(const Light& light)
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{
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m_globalLight = light;
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}
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void LightView::addLightSource(const Point& center, float scaleFactor, const Light& light)
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{
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int radius = light.intensity * m_lightRadius * scaleFactor * 0.25f;
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Color color = Color::from8bit(light.color);
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float brightness = 0.8f + (light.intensity/8.0f)*0.2f;
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color.setRed(color.rF() * brightness);
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color.setGreen(color.gF() * brightness);
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color.setBlue(color.bF() * brightness);
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LightSource source;
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source.center = center;
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source.color = color;
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source.radius = radius;
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m_lightMap.push_back(source);
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}
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void LightView::drawGlobalLight(const Light& light)
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{
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Color color = Color::from8bit(light.color);
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float brightness = light.intensity / 256.0f;
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color.setRed(color.rF() * brightness);
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color.setGreen(color.gF() * brightness);
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color.setBlue(color.bF() * brightness);
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g_painter->setColor(color);
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g_painter->drawFilledRect(Rect(0,0,m_lightbuffer->getSize()));
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}
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void LightView::drawLightSource(const Point& center, const Color& color, int radius)
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{
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Rect dest = Rect(center - Point(radius, radius), Size(radius*2,radius*2));
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g_painter->setColor(color);
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g_painter->setCompositionMode(Painter::CompositionMode_Add);
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g_painter->drawTexturedRect(dest, m_lightTexture);
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// debug draw
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/*
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radius = 8;
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g_painter->setColor(Color::black);
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g_painter->setCompositionMode(Painter::CompositionMode_Replace);
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g_painter->drawBoundingRect(Rect(center - Point(radius, radius), Size(radius*2,radius*2)), 4);
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*/
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}
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void LightView::resize(const Size& size)
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{
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m_lightbuffer->resize(size);
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}
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void LightView::draw(const Rect& dest, const Rect& src)
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{
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g_painter->saveAndResetState();
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m_lightbuffer->bind();
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g_painter->setCompositionMode(Painter::CompositionMode_Replace);
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drawGlobalLight(m_globalLight);
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g_painter->setCompositionMode(Painter::CompositionMode_Add);
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for(const LightSource& source : m_lightMap)
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drawLightSource(source.center, source.color, source.radius);
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m_lightbuffer->release();
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g_painter->setCompositionMode(Painter::CompositionMode_Light);
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m_lightbuffer->draw(dest, src);
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g_painter->restoreSavedState();
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}
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