From 4349f3f82ca67f5cf81a8e5502a91266a4cf1f55 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop+git@gmail.com>
Date: Thu, 19 May 2011 16:54:10 -0400
Subject: [PATCH] remove GLU/TextureLoader/FileLoader dependance

no longer generating mipmaps
---
 TextureCache.cc | 99 +++++++------------------------------------------
 TextureCache.h  | 19 ++++------
 2 files changed, 20 insertions(+), 98 deletions(-)

diff --git a/TextureCache.cc b/TextureCache.cc
index 95b4142..f6452c5 100644
--- a/TextureCache.cc
+++ b/TextureCache.cc
@@ -1,72 +1,26 @@
 
+#include <stdlib.h>
 #include <SDL.h>
 #include <SDL_image.h>
-#include <GL/gl.h>
-#include <GL/glu.h>
 #include <iostream>
 #include "TextureCache.h"
-#include "TextureLoader/TextureLoader.h"
-#include "FileLoader/FileLoader.h"
+
 using namespace std;
 
-//#define DEBUG_GL_ERROR
-#ifdef DEBUG_GL_ERROR
-#define checkGLError() checkGLErrorLine(__FUNCTION__, __LINE__)
-static void checkGLErrorLine(const char * function, int line)
+GLuint TextureCache::load(const char *fname)
 {
-    GLenum err = glGetError();
-    if (err != 0)
-    {
-        cerr << "gl error in " << function
-            << ": " << err << " (0x" << hex << err << ") at line "
-            << dec << line << endl;
-    }
-}
-#else
-#define checkGLError()
-#endif
-
-TextureCache::~TextureCache()
-{
-}
-
-GLuint TextureCache::load(const FileLoader::Path & path,
-        FileLoader & fileLoader, bool mipmaps,
-        int mode, int quality)
-{
-    string filename = path.shortPath;
-    if (filename == "")
-        filename = path.fullPath;
-    if (filename == "")
-        return 0;
+    string filename = fname;
     map<string,GLuint>::iterator it = m_cache.find(filename);
     if (it != m_cache.end())
     {
         return it->second;
     }
-    GLuint tex = loadTexture(path, fileLoader, mipmaps, mode, quality);
-    if (tex > 0)
-    {
-        m_cache[filename] = tex;
-    }
-    return tex;
-}
 
-GLuint TextureCache::loadTexture(const FileLoader::Path & path,
-        FileLoader & fileLoader, bool mipmaps,
-        int mode, int quality)
-{
-    checkGLError();
     GLuint texture;
-    FileLoader::Buffer buff = fileLoader.load(path);
-    if (buff.size <= 0)
-        return 0;
-    SDL_RWops * ops = SDL_RWFromMem(buff.data, buff.size);
-    SDL_Surface * temp = IMG_Load_RW(ops, true);
+    SDL_Surface * temp = IMG_Load(filename);
     if (!temp)
     {
-        cerr << "Failed to load image ('" << path.fullPath << "', '"
-            << path.shortPath << "'): " << IMG_GetError() << endl;
+        fprintf(stderr, "Failed to load image '%s'!\n", filename);
         return 0;
     }
 
@@ -87,10 +41,11 @@ GLuint TextureCache::loadTexture(const FileLoader::Path & path,
     SDL_FreeSurface(temp);
     if (!texsurf)
     {
-        cerr << "Image was not converted properly!" << endl;
+        fprintf(stderr, "'%s' was not converted properly!\n", filename);
         return 0;
     }
-    unsigned int * pixels = new unsigned int[texsurf->w * texsurf->h];
+    unsigned int * pixels =
+        malloc(sizeof(unsigned int) * texsurf->w * texsurf->h);
     int y;
     unsigned int dstOffset = texsurf->w * (texsurf->h - 1);
     unsigned int srcOffset = 0;
@@ -103,41 +58,13 @@ GLuint TextureCache::loadTexture(const FileLoader::Path & path,
         srcOffset += texsurf->w;
     }
     glGenTextures(1, &texture);
-    checkGLError();
     glBindTexture(GL_TEXTURE_2D, texture);
-    checkGLError();
-    glTexImage2D(GL_TEXTURE_2D, 0, 4, texsurf->w, texsurf->h, 0,
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texsurf->w, texsurf->h, 0,
         GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 
-    if (quality > 0)
-    {
-        checkGLError();
-        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
-            mipmaps ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
-        checkGLError();
-    }
-    else
-    {
-        checkGLError();
-        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
-            mipmaps ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST);
-        checkGLError();
-    }
-
-    checkGLError();
-
-    if (mipmaps)
-    {
-        checkGLError();
-        gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA,
-            texsurf->w, texsurf->h, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
-        checkGLError();
-    }
-
     SDL_FreeSurface(texsurf);
-    delete[] pixels;
-    checkGLError();
+    free(pixels);
+
+    m_cache[filename] = texture;
     return texture;
 }
diff --git a/TextureCache.h b/TextureCache.h
index f679ac8..ba693a5 100644
--- a/TextureCache.h
+++ b/TextureCache.h
@@ -3,26 +3,21 @@
 #define TEXTURECACHE_H TEXTURECACHE_H
 
 #include <SDL.h>
+#ifdef GL_INCLUDE_FILE
+#include GL_INCLUDE_FILE
+#else
 #include <GL/gl.h>
+#endif
+
 #include <map>
 #include <string>
-#include "TextureLoader/TextureLoader.h"
-#include "FileLoader/FileLoader.h"
 
-class TextureCache : public TextureLoader
+class TextureCache
 {
 public:
-    virtual ~TextureCache();
-    virtual GLuint load(const FileLoader::Path & path,
-            FileLoader & fileLoader, bool mipmaps = true,
-            int mode = GL_DECAL, int quality = 1);
+    GLuint load(const char *fname);
 
 protected:
-    /* methods */
-    GLuint loadTexture(const FileLoader::Path & path,
-            FileLoader & fileLoader, bool mipmaps,
-            int mode, int quality);
-
     /* data */
     std::map< std::string, GLuint > m_cache;
 };