128 lines
3.6 KiB
C++
128 lines
3.6 KiB
C++
#include "precompiled.h"
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#include <map>
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#include "ogl.h"
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#include "lib/res/graphics/ogl_tex.h"
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#include "CLogger.h"
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#include "TextureEntry.h"
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#include "TextureManager.h"
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#include "TerrainProperties.h"
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#include "Texture.h"
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#include "Renderer.h"
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#define LOG_CATEGORY "graphics"
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using namespace std;
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map<Handle, CTextureEntry *> CTextureEntry::m_LoadedTextures;
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/////////////////////////////////////////////////////////////////////////////////////
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// CTextureEntry constructor
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CTextureEntry::CTextureEntry(CTerrainPropertiesPtr props, CStr path):
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m_pProperties(props),
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m_Bitmap(NULL),
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m_Handle(-1),
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m_BaseColor(0),
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m_BaseColorValid(false),
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m_TexturePath(path)
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{
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if (m_pProperties)
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m_Groups = m_pProperties->GetGroups();
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GroupVector::iterator it=m_Groups.begin();
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for (;it!=m_Groups.end();++it)
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(*it)->AddTerrain(this);
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long slashPos=m_TexturePath.ReverseFind("/");
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long dotPos=m_TexturePath.ReverseFind(".");
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if (slashPos == -1)
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slashPos = 0;
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else
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slashPos++; // Skip the actual slash
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if (dotPos == -1)
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dotPos = (long)m_TexturePath.Length();
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m_Tag = m_TexturePath.GetSubstring(slashPos, dotPos-slashPos);
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}
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/////////////////////////////////////////////////////////////////////////////////////
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// CTextureEntry destructor
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CTextureEntry::~CTextureEntry()
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{
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map<Handle,CTextureEntry *>::iterator it=m_LoadedTextures.find(m_Handle);
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if (it != m_LoadedTextures.end())
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m_LoadedTextures.erase(it);
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if (m_Handle > 0)
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ogl_tex_free(m_Handle);
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for (GroupVector::iterator it=m_Groups.begin();it!=m_Groups.end();++it)
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(*it)->RemoveTerrain(this);
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}
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/////////////////////////////////////////////////////////////////////////////////////
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// LoadTexture: actually load the texture resource from file
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void CTextureEntry::LoadTexture()
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{
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CTexture texture;
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texture.SetName(m_TexturePath);
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if (g_Renderer.LoadTexture(&texture,GL_REPEAT)) {
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m_Handle=texture.GetHandle();
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m_LoadedTextures[m_Handle] = this;
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} else {
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m_Handle=0;
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// BuildBaseColor: calculate the root colour of the texture, used for coloring minimap, and store
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// in m_BaseColor member
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void CTextureEntry::BuildBaseColor()
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{
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if (m_pProperties && m_pProperties->HasBaseColor())
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{
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m_BaseColor=m_pProperties->GetBaseColor();
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m_BaseColorValid=true;
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return;
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}
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ogl_tex_bind(GetHandle());
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// get root colour for coloring minimap by querying root level of the texture
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// (this should decompress any compressed textures for us),
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// then scaling it down to a 1x1 size
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// - an alternative approach of just grabbing the top level of the mipmap tree fails
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// (or gives an incorrect colour) in some cases:
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// - suspect bug on Radeon cards when SGIS_generate_mipmap is used
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// - any textures without mipmaps
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// we'll just take the basic approach here.
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//
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// jw: this is horribly inefficient (taking 750ms for 10 texture types),
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// but it is no longer called, since terrain XML files are supposed to
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// include a minimap color attribute. therefore, leave it as-is.
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int width,height;
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glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_WIDTH,&width);
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glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_HEIGHT,&height);
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unsigned char* buf=new unsigned char[width*height*4];
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glGetTexImage(GL_TEXTURE_2D,0,GL_BGRA_EXT,GL_UNSIGNED_BYTE,buf);
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gluScaleImage(GL_BGRA_EXT,width,height,GL_UNSIGNED_BYTE,buf,
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1,1,GL_UNSIGNED_BYTE,&m_BaseColor);
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delete[] buf;
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m_BaseColorValid=true;
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}
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CTextureEntry *CTextureEntry::GetByHandle(Handle handle)
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{
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map<Handle, CTextureEntry *>::iterator it=m_LoadedTextures.find(handle);
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if (it != m_LoadedTextures.end())
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return it->second;
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else
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return NULL;
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}
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