62 lines
2.2 KiB
C++
Executable File
62 lines
2.2 KiB
C++
Executable File
#include "ogl.h"
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#include "res/tex.h"
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#include "TextureEntry.h"
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#include "TextureManager.h"
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#include "Texture.h"
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#include "CLogger.h"
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#include "Renderer.h"
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/////////////////////////////////////////////////////////////////////////////////////
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// CTextureEntry constructor
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CTextureEntry::CTextureEntry(const char* name,int type)
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: m_Name(name), m_Bitmap(0), m_Handle(0xffffffff), m_BaseColor(0), m_Type(type), m_BaseColorValid(false)
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{
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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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CStr pathname("art/textures/terrain/types/");
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pathname+=g_TexMan.m_TerrainTextures[m_Type].m_Name;
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pathname+='/';
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pathname+=m_Name;
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CTexture texture;
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texture.SetName(pathname);
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if (g_Renderer.LoadTexture(&texture,GL_REPEAT)) {
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m_Handle=texture.GetHandle();
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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 color 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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Handle handle=GetHandle();
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g_Renderer.BindTexture(0,tex_id(handle));
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// get root color 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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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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} |