110 lines
2.6 KiB
C++
110 lines
2.6 KiB
C++
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#include "spritemanager.h"
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#include <framework/core/resourcemanager.h>
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#include <framework/graphics/graphics.h>
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SpriteManager g_sprites;
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SpriteManager::SpriteManager()
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{
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m_spritesCount = 0;
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m_signature = 0;
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}
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bool SpriteManager::load(const std::string &filename)
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{
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g_resources.loadFile(filename, m_fin);
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m_signature = fw::getu32(m_fin);
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m_spritesCount = fw::getu16(m_fin);
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m_sprites.resize(m_spritesCount);
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return true;
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}
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void SpriteManager::unload()
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{
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m_sprites.clear();
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m_spritesCount = 0;
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m_signature = 0;
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}
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TexturePtr SpriteManager::loadSprite(int id)
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{
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m_fin.seekg(((id-1) * 4) + 6, std::ios_base::beg);
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uint32 spriteAddress = fw::getu32(m_fin);
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// no sprite? return an empty texture
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if(spriteAddress == 0)
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return g_graphics.getEmptyTexture();
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m_fin.seekg(spriteAddress, std::ios_base::beg);
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assert(m_fin.good());
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// skip color key
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fw::getu8(m_fin);
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fw::getu8(m_fin);
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fw::getu8(m_fin);
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uint16 pixelDataSize = fw::getu16(m_fin);
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uchar pixels[4096];
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int writePos = 0;
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int read = 0;
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// decompress pixels
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while(read < pixelDataSize) {
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uint16 transparentPixels, coloredPixels;
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m_fin.read((char*)&transparentPixels, 2);
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m_fin.read((char*)&coloredPixels, 2);
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for(int i = 0; i < transparentPixels; i++) {
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pixels[writePos + 0] = 0x00;
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pixels[writePos + 1] = 0x00;
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pixels[writePos + 2] = 0x00;
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pixels[writePos + 3] = 0x00;
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writePos += 4;
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}
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for(int i = 0; i < coloredPixels; i++) {
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pixels[writePos + 0] = fw::getu8(m_fin);
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pixels[writePos + 1] = fw::getu8(m_fin);
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pixels[writePos + 2] = fw::getu8(m_fin);
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pixels[writePos + 3] = 0xFF;
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writePos += 4;
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}
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read += 4 + (3 * coloredPixels);
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}
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// fill remaining pixels with alpha
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while(writePos < 4096) {
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pixels[writePos + 0] = 0x00;
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pixels[writePos + 1] = 0x00;
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pixels[writePos + 2] = 0x00;
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pixels[writePos + 3] = 0x00;
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writePos += 4;
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}
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return TexturePtr(new Texture(32, 32, 4, pixels));
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}
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TexturePtr SpriteManager::getSpriteTexture(int id)
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{
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if(id == 0)
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return g_graphics.getEmptyTexture();
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assert(id <= m_spritesCount);
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// load sprites on demand
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TexturePtr texture = m_sprites[id-1];
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if(!texture) {
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texture = loadSprite(id);
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m_sprites[id-1] = texture;
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}
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//TODO: release unused sprites textures after X seconds
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// to avoid massive texture allocations
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return texture;
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}
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