]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - gl_textures.c
removed detection of GL_NV_texture_shader extension which was previously used for...
[xonotic/darkplaces.git] / gl_textures.c
index 43bf88e8b8e5f1522cfba9f97f191102f82662cc..7a53cd30d2fd00646e69c6a88a74df6fdb9335c5 100644 (file)
 
 #include "quakedef.h"
+#include "image.h"
+#include "jpeg.h"
+#include "image_png.h"
 
-cvar_t r_max_size = {CVAR_SAVE, "r_max_size", "2048"};
-cvar_t r_max_scrapsize = {CVAR_SAVE, "r_max_scrapsize", "256"};
-cvar_t r_picmip = {CVAR_SAVE, "r_picmip", "0"};
-cvar_t r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1"};
-cvar_t r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1"};
+cvar_t gl_max_size = {CVAR_SAVE, "gl_max_size", "2048", "maximum allowed texture size, can be used to reduce video memory usage, note: this is automatically reduced to match video card capabilities (such as 256 on 3Dfx cards before Voodoo4/5)"};
+cvar_t gl_picmip = {CVAR_SAVE, "gl_picmip", "0", "reduces resolution of textures by powers of 2, for example 1 will halve width/height, reducing texture memory usage by 75%"};
+cvar_t r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1", "bilinear filters images when scaling them up to power of 2 size (mode 1), looks better than glquake (mode 0)"};
+cvar_t r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1", "0 = never upload textures until used, 1 = upload most textures before use (exceptions: rarely used skin colormap layers), 2 = upload all textures before use (can increase texture memory usage significantly)"};
+cvar_t gl_texture_anisotropy = {CVAR_SAVE, "gl_texture_anisotropy", "1", "anisotropic filtering quality (if supported by hardware), 1 sample (no anisotropy) and 8 sample (8 tap anisotropy) are recommended values"};
 
 int            gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
 int            gl_filter_mag = GL_LINEAR;
 
 
 static mempool_t *texturemempool;
-static mempool_t *texturedatamempool;
-static mempool_t *textureprocessingmempool;
 
 // note: this must not conflict with TEXF_ flags in r_textures.h
 // cleared when a texture is uploaded
 #define GLTEXF_UPLOAD 0x00010000
-// texture generated by code, also causes permanent GLTEXF_UPLOAD effect
-#define GLTEXF_PROCEDURAL 0x00020000
 // bitmask for mismatch checking
-#define GLTEXF_IMPORTANTBITS (GLTEXF_PROCEDURAL)
+#define GLTEXF_IMPORTANTBITS (0)
 // set when image is uploaded and freed
 #define GLTEXF_DESTROYED 0x00040000
 
-// size of images which hold fragment textures, ignores picmip and max_size
-//#define BLOCK_SIZE 256
-static int block_size;
-
-// really this number only governs gltexnuminuse
-#define MAX_GLTEXTURES 65536
-
-// since there is only one set of GL texture numbers, we have to track them
-// globally, everything else is per texture pool
-static qbyte *gltexnuminuse;
-
-typedef struct
+typedef struct textypeinfo_s
 {
        int textype;
        int inputbytesperpixel;
        int internalbytesperpixel;
        int glformat;
        int glinternalformat;
-       int align;
 }
 textypeinfo_t;
 
-static textypeinfo_t textype_qpalette       = {TEXTYPE_QPALETTE, 1, 4, GL_RGBA, 3, 1};
-static textypeinfo_t textype_rgb            = {TEXTYPE_RGB     , 3, 3, GL_RGB , 3, 3};
-static textypeinfo_t textype_rgba           = {TEXTYPE_RGBA    , 4, 4, GL_RGBA, 3, 1};
-static textypeinfo_t textype_qpalette_alpha = {TEXTYPE_QPALETTE, 1, 4, GL_RGBA, 4, 1};
-static textypeinfo_t textype_rgba_alpha     = {TEXTYPE_RGBA    , 4, 4, GL_RGBA, 4, 1};
-
-// a tiling texture (most common type)
-#define GLIMAGETYPE_TILE 0
-// a fragments texture (contains one or more fragment textures)
-#define GLIMAGETYPE_FRAGMENTS 1
+static textypeinfo_t textype_palette       = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 3};
+static textypeinfo_t textype_rgb           = {TEXTYPE_RGB    , 3, 3, GL_RGB    , 3};
+static textypeinfo_t textype_rgba          = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 3};
+static textypeinfo_t textype_palette_alpha = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 4};
+static textypeinfo_t textype_rgba_alpha    = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 4};
+
+#define GLTEXTURETYPE_1D 0
+#define GLTEXTURETYPE_2D 1
+#define GLTEXTURETYPE_3D 2
+#define GLTEXTURETYPE_CUBEMAP 3
+
+static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
+static int gltexturetypebindingenums[4] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB};
+static int gltexturetypedimensions[4] = {1, 2, 3, 2};
+static int cubemapside[6] =
+{
+       GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
+       GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
+       GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
+       GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
+       GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
+       GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
+};
 
-// a gltextureimage can have one (or more if fragments) gltextures inside
-typedef struct gltextureimage_s
+typedef struct gltexture_s
 {
-       struct gltextureimage_s *imagechain;
-       int texturecount;
-       int type; // one of the GLIMAGETYPE_ values
+       // this field is exposed to the R_GetTexture macro, for speed reasons
+       // (must be identical in rtexture_t)
        int texnum; // GL texture slot number
-       int width, height;
-       int bytesperpixel; // bytes per pixel
-       int glformat; // GL_RGB or GL_RGBA
-       int glinternalformat; // 3 or 4
-       int flags;
-       short *blockallocation; // fragment allocation
-}
-gltextureimage_t;
 
-typedef struct gltexture_s
-{
        // pointer to texturepool (check this to see if the texture is allocated)
        struct gltexturepool_s *pool;
        // pointer to next texture in texturepool chain
        struct gltexture_s *chain;
-       // pointer into gltextureimage array
-       gltextureimage_t *image;
        // name of the texture (this might be removed someday), no duplicates
-       char *identifier;
-       // location in the image, and size
-       int x, y, width, height;
-       // copy of the original texture supplied to the upload function, for re-uploading or deferred uploads (non-precached)
-       qbyte *inputtexels;
-       // to identify cache mismatchs (this might be removed someday)
-       int crc;
-       // flags supplied to the LoadTexture/ProceduralTexture functions
+       char identifier[32];
+       // original data size in *inputtexels
+       int inputwidth, inputheight, inputdepth;
+       // copy of the original texture(s) supplied to the upload function, for
+       // delayed uploads (non-precached)
+       unsigned char *inputtexels;
+       // original data size in *inputtexels
+       int inputdatasize;
+       // flags supplied to the LoadTexture function
        // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
        int flags;
-       // procedural texture generation function, called once per frame if the texture is used
-       int (*generate)(qbyte *buffer, int width, int height, void *parameterdata, int parameterdatasize);
-       // data provided to generate, persistent from call to call
-       qbyte *proceduraldata;
-       // size of data
-       int proceduraldatasize;
-       // used only to avoid updating the texture more than once per frame
-       int proceduralframecount;
        // pointer to one of the textype_ structs
        textypeinfo_t *textype;
+       // one of the GLTEXTURETYPE_ values
+       int texturetype;
+       // palette if the texture is TEXTYPE_PALETTE
+       const unsigned int *palette;
+       // power of 2 size, after gl_picmip and gl_max_size are applied
+       int tilewidth, tileheight, tiledepth;
+       // 1 or 6 depending on texturetype
+       int sides;
+       // bytes per pixel
+       int bytesperpixel;
+       // GL_RGB or GL_RGBA
+       int glformat;
+       // 3 or 4
+       int glinternalformat;
 }
 gltexture_t;
 
@@ -110,8 +103,7 @@ gltexture_t;
 
 typedef struct gltexturepool_s
 {
-       int sentinel;
-       struct gltextureimage_s *imagechain;
+       unsigned int sentinel;
        struct gltexture_s *gltchain;
        struct gltexturepool_s *next;
 }
@@ -119,28 +111,26 @@ gltexturepool_t;
 
 static gltexturepool_t *gltexturepoolchain = NULL;
 
-static qbyte *resizebuffer = NULL, *colorconvertbuffer;
+static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
 static int resizebuffersize = 0;
-static qbyte *texturebuffer;
+static unsigned char *texturebuffer;
 static int texturebuffersize = 0;
 
-static int realmaxsize = 0;
-
 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 {
        if (flags & TEXF_ALPHA)
        {
                switch(textype)
                {
-               case TEXTYPE_QPALETTE:
-                       return &textype_qpalette_alpha;
+               case TEXTYPE_PALETTE:
+                       return &textype_palette_alpha;
                case TEXTYPE_RGB:
-                       Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
+                       Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed");
                        return NULL;
                case TEXTYPE_RGBA:
                        return &textype_rgba_alpha;
                default:
-                       Host_Error("R_GetTexTypeInfo: unknown texture format\n");
+                       Host_Error("R_GetTexTypeInfo: unknown texture format");
                        return NULL;
                }
        }
@@ -148,14 +138,14 @@ static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
        {
                switch(textype)
                {
-               case TEXTYPE_QPALETTE:
-                       return &textype_qpalette;
+               case TEXTYPE_PALETTE:
+                       return &textype_palette;
                case TEXTYPE_RGB:
                        return &textype_rgb;
                case TEXTYPE_RGBA:
                        return &textype_rgba;
                default:
-                       Host_Error("R_GetTexTypeInfo: unknown texture format\n");
+                       Host_Error("R_GetTexTypeInfo: unknown texture format");
                        return NULL;
                }
        }
@@ -179,95 +169,48 @@ static void R_PrecacheTexture(gltexture_t *glt)
                R_UploadTexture(glt);
 }
 
-int R_GetTexture(rtexture_t *rt)
+int R_RealGetTexture(rtexture_t *rt)
 {
-       gltexture_t *glt;
-       if (!rt)
-               return 0;
-       glt = (gltexture_t *)rt;
-       if (glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL))
+       if (rt)
        {
-               if (glt->flags & GLTEXF_PROCEDURAL)
-               {
-                       if (glt->proceduralframecount != r_framecount)
-                       {
-                               glt->proceduralframecount = r_framecount;
-                               R_UploadTexture(glt);
-                       }
-               }
-               else
+               gltexture_t *glt;
+               glt = (gltexture_t *)rt;
+               if (glt->flags & GLTEXF_UPLOAD)
                        R_UploadTexture(glt);
+               return glt->texnum;
        }
-       return glt->image->texnum;
+       else
+               return 0;
 }
 
-static void R_FreeTexture(gltexture_t *glt)
+void R_FreeTexture(rtexture_t *rt)
 {
-       gltexture_t **gltpointer;
-       gltextureimage_t *image, **gltimagepointer;
-       GLuint texnum;
+       gltexture_t *glt, **gltpointer;
 
+       glt = (gltexture_t *)rt;
        if (glt == NULL)
-               Host_Error("R_FreeTexture: texture == NULL\n");
+               Host_Error("R_FreeTexture: texture == NULL");
 
        for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
        if (*gltpointer == glt)
                *gltpointer = glt->chain;
        else
-               Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
-
-       // note: if freeing a fragment texture, this will not make the claimed
-       // space available for new textures unless all other fragments in the
-       // image are also freed
-       image = glt->image;
-       image->texturecount--;
-       if (image->texturecount < 1)
-       {
-               for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
-               if (*gltimagepointer == image)
-                       *gltimagepointer = image->imagechain;
-               else
-                       Host_Error("R_FreeTexture: image not linked in pool\n");
-               if (image->texnum)
-               {
-                       texnum = image->texnum;
-                       gltexnuminuse[image->texnum] = 0;
-                       qglDeleteTextures(1, &texnum);
-               }
-               if (image->blockallocation)
-                       Mem_Free(image->blockallocation);
-               Mem_Free(image);
-       }
+               Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
+
+       if (glt->texnum)
+               qglDeleteTextures(1, (GLuint *)&glt->texnum);
 
-       if (glt->identifier)
-               Mem_Free(glt->identifier);
        if (glt->inputtexels)
                Mem_Free(glt->inputtexels);
-       if (glt->proceduraldata)
-               Mem_Free(glt->proceduraldata);
        Mem_Free(glt);
 }
 
-static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
-{
-       gltexture_t     *glt;
-
-       if (!identifier)
-               return NULL;
-
-       for (glt = pool->gltchain;glt;glt = glt->chain)
-               if (glt->identifier && !strcmp (identifier, glt->identifier))
-                       return glt;
-
-       return NULL;
-}
-
 rtexturepool_t *R_AllocTexturePool(void)
 {
        gltexturepool_t *pool;
        if (texturemempool == NULL)
                return NULL;
-       pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
+       pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
        if (pool == NULL)
                return NULL;
        pool->next = gltexturepoolchain;
@@ -286,28 +229,26 @@ void R_FreeTexturePool(rtexturepool_t **rtexturepool)
        pool = (gltexturepool_t *)(*rtexturepool);
        *rtexturepool = NULL;
        if (pool->sentinel != TEXTUREPOOL_SENTINEL)
-               Host_Error("R_FreeTexturePool: pool already freed\n");
+               Host_Error("R_FreeTexturePool: pool already freed");
        for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
        if (*poolpointer == pool)
                *poolpointer = pool->next;
        else
-               Host_Error("R_FreeTexturePool: pool not linked\n");
+               Host_Error("R_FreeTexturePool: pool not linked");
        while (pool->gltchain)
-               R_FreeTexture(pool->gltchain);
-       if (pool->imagechain)
-               Sys_Error("R_FreeTexturePool: not all images freed\n");
+               R_FreeTexture((rtexture_t *)pool->gltchain);
        Mem_Free(pool);
 }
 
 
-typedef struct
+typedef struct glmode_s
 {
        char *name;
        int minification, magnification;
 }
 glmode_t;
 
-static glmode_t modes[] =
+static glmode_t modes[6] =
 {
        {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
        {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
@@ -317,12 +258,11 @@ static glmode_t modes[] =
        {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 };
 
-extern int gl_backend_rebindtextures;
-
 static void GL_TextureMode_f (void)
 {
        int i;
-       gltextureimage_t *image;
+       GLint oldbindtexnum;
+       gltexture_t *glt;
        gltexturepool_t *pool;
 
        if (Cmd_Argc() == 1)
@@ -331,20 +271,20 @@ static void GL_TextureMode_f (void)
                {
                        if (gl_filter_min == modes[i].minification)
                        {
-                               Con_Printf ("%s\n", modes[i].name);
+                               Con_Printf("%s\n", modes[i].name);
                                return;
                        }
                }
-               Con_Print("current filter is unknown???\n");
+               Con_Print("current filter is unknown???\n");
                return;
        }
 
        for (i = 0;i < 6;i++)
-               if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
+               if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
                        break;
        if (i == 6)
        {
-               Con_Print("bad filter name\n");
+               Con_Print("bad filter name\n");
                return;
        }
 
@@ -355,128 +295,171 @@ static void GL_TextureMode_f (void)
        // FIXME: force renderer(/client/something?) restart instead?
        for (pool = gltexturepoolchain;pool;pool = pool->next)
        {
-               for (image = pool->imagechain;image;image = image->imagechain)
+               for (glt = pool->gltchain;glt;glt = glt->chain)
                {
                        // only update already uploaded images
-                       if (!(image->flags & GLTEXF_UPLOAD))
+                       if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
                        {
-                               qglBindTexture(GL_TEXTURE_2D, image->texnum);
-                               if (image->flags & TEXF_MIPMAP)
-                                       qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
+                               qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);
+                               qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);
+                               if (glt->flags & TEXF_MIPMAP)
+                                       qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);
                                else
-                                       qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
-                               qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
+                                       qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);
+                               qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);
+                               qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);
                        }
                }
        }
-       gl_backend_rebindtextures = true;
 }
 
+static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
+{
+       int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
+
+       if (gl_max_size.integer > gl_max_texture_size)
+               Cvar_SetValue("gl_max_size", gl_max_texture_size);
+
+       switch (texturetype)
+       {
+       default:
+       case GLTEXTURETYPE_1D:
+       case GLTEXTURETYPE_2D:
+               maxsize = gl_max_texture_size;
+               break;
+       case GLTEXTURETYPE_3D:
+               maxsize = gl_max_3d_texture_size;
+               break;
+       case GLTEXTURETYPE_CUBEMAP:
+               maxsize = gl_max_cube_map_texture_size;
+               break;
+       }
+
+       if (flags & TEXF_PICMIP)
+       {
+               maxsize = min(maxsize, gl_max_size.integer);
+               picmip = gl_picmip.integer;
+       }
+
+       if (outwidth)
+       {
+               for (width2 = 1;width2 < inwidth;width2 <<= 1);
+               for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
+               *outwidth = max(1, width2);
+       }
+       if (outheight)
+       {
+               for (height2 = 1;height2 < inheight;height2 <<= 1);
+               for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
+               *outheight = max(1, height2);
+       }
+       if (outdepth)
+       {
+               for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
+               for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
+               *outdepth = max(1, depth2);
+       }
+}
+
+
 static int R_CalcTexelDataSize (gltexture_t *glt)
 {
-       int width2, height2, size;
-       if (glt->flags & TEXF_FRAGMENT)
-               size = glt->width * glt->height;
-       else
+       int width2, height2, depth2, size;
+
+       GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
+
+       size = width2 * height2 * depth2;
+
+       if (glt->flags & TEXF_MIPMAP)
        {
-               if (r_max_size.integer > realmaxsize)
-                       Cvar_SetValue("r_max_size", realmaxsize);
-               // calculate final size
-               for (width2 = 1;width2 < glt->width;width2 <<= 1);
-               for (height2 = 1;height2 < glt->height;height2 <<= 1);
-               for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
-               for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
-               if (width2 < 1) width2 = 1;
-               if (height2 < 1) height2 = 1;
-
-               size = 0;
-               if (glt->flags & TEXF_MIPMAP)
+               while (width2 > 1 || height2 > 1 || depth2 > 1)
                {
-                       while (width2 > 1 || height2 > 1)
-                       {
-                               size += width2 * height2;
-                               if (width2 > 1)
-                                       width2 >>= 1;
-                               if (height2 > 1)
-                                       height2 >>= 1;
-                       }
-                       size++; // count the last 1x1 mipmap
+                       if (width2 > 1)
+                               width2 >>= 1;
+                       if (height2 > 1)
+                               height2 >>= 1;
+                       if (depth2 > 1)
+                               depth2 >>= 1;
+                       size += width2 * height2 * depth2;
                }
-               else
-                       size = width2*height2;
        }
-       size *= glt->textype->internalbytesperpixel;
 
-       return size;
+       return size * glt->textype->internalbytesperpixel * glt->sides;
 }
 
-void R_TextureStats_PrintTotal(void)
+void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 {
-       int glsize, inputsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
+       int glsize;
+       int isloaded;
+       int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
+       int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
        gltexture_t *glt;
        gltexturepool_t *pool;
+       if (printeach)
+               Con_Print("glsize input loaded mip alpha name\n");
        for (pool = gltexturepoolchain;pool;pool = pool->next)
        {
+               pooltotal = 0;
+               pooltotalt = 0;
+               pooltotalp = 0;
+               poolloaded = 0;
+               poolloadedt = 0;
+               poolloadedp = 0;
                for (glt = pool->gltchain;glt;glt = glt->chain)
                {
                        glsize = R_CalcTexelDataSize(glt);
-                       inputsize = glt->width * glt->height * glt->textype->inputbytesperpixel;
-
-                       total++;
-                       totalt += glsize;
-                       totalp += inputsize;
-                       if (!(glt->flags & GLTEXF_UPLOAD))
+                       isloaded = !(glt->flags & GLTEXF_UPLOAD);
+                       pooltotal++;
+                       pooltotalt += glsize;
+                       pooltotalp += glt->inputdatasize;
+                       if (isloaded)
                        {
-                               loaded++;
-                               loadedt += glsize;
-                               loadedp += inputsize;
+                               poolloaded++;
+                               poolloadedt += glsize;
+                               poolloadedp += glt->inputdatasize;
                        }
+                       if (printeach)
+                               Con_Printf("%c%4i%c%c%4i%c %s %s %s %s\n", isloaded ? '[' : ' ', (glsize + 1023) / 1024, isloaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->inputdatasize + 1023) / 1024, glt->inputtexels ? ']' : ' ', isloaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier);
                }
+               if (printpool)
+                       Con_Printf("texturepool %10p total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", pool, pooltotal, pooltotalt / 1048576.0, pooltotalp / 1048576.0, poolloaded, poolloadedt / 1048576.0, poolloadedp / 1048576.0, pooltotal - poolloaded, (pooltotalt - poolloadedt) / 1048576.0, (pooltotalp - poolloadedp) / 1048576.0);
+               sumtotal += pooltotal;
+               sumtotalt += pooltotalt;
+               sumtotalp += pooltotalp;
+               sumloaded += poolloaded;
+               sumloadedt += poolloadedt;
+               sumloadedp += poolloadedp;
        }
-       Con_Printf("total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", total, totalt / 1048576.0, totalp / 1048576.0, loaded, loadedt / 1048576.0, loadedp / 1048576.0, total - loaded, (totalt - loadedt) / 1048576.0, (totalp - loadedp) / 1048576.0);
+       if (printtotal)
+               Con_Printf("textures total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", sumtotal, sumtotalt / 1048576.0, sumtotalp / 1048576.0, sumloaded, sumloadedt / 1048576.0, sumloadedp / 1048576.0, sumtotal - sumloaded, (sumtotalt - sumloadedt) / 1048576.0, (sumtotalp - sumloadedp) / 1048576.0);
 }
 
 static void R_TextureStats_f(void)
 {
-       int loaded;
-       gltexture_t *glt;
-       gltexturepool_t *pool;
-       Con_Printf("glsize input crc  loaded mip alpha name\n");
-       for (pool = gltexturepoolchain;pool;pool = pool->next)
-       {
-               for (glt = pool->gltchain;glt;glt = glt->chain)
-               {
-                       loaded = !(glt->flags & GLTEXF_UPLOAD);
-                       if (glt->flags & GLTEXF_PROCEDURAL)
-                               Con_Printf("%c%4i%c %4i  PROC %s %s %s %s\n"  , loaded ? '[' : ' ', (R_CalcTexelDataSize(glt) + 1023) / 1024, loaded ? ']' : ' ',                               (glt->width * glt->height * glt->textype->inputbytesperpixel + 1023) / 1024,                                         loaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier ? glt->identifier : "<unnamed>");
-                       else
-                               Con_Printf("%c%4i%c%c%4i%c %04X %s %s %s %s\n", loaded ? '[' : ' ', (R_CalcTexelDataSize(glt) + 1023) / 1024, loaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->width * glt->height * glt->textype->inputbytesperpixel + 1023) / 1024, glt->inputtexels ? ']' : ' ', glt->crc, loaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier ? glt->identifier : "<unnamed>");
-               }
-               Con_Printf("pool %10p\n", pool);
-       }
-       R_TextureStats_PrintTotal();
+       R_TextureStats_Print(true, true, true);
 }
 
-char engineversion[40];
-
 static void r_textures_start(void)
 {
-       // deal with size limits of various drivers (3dfx in particular)
-       qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
+       // LordHavoc: allow any alignment
+       qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
        CHECKGLERROR
 
-       // use the largest scrap texture size we can (not sure if this is really a good idea)
-       for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
+       texturemempool = Mem_AllocPool("texture management", 0, NULL);
 
-       texturemempool = Mem_AllocPool("Texture Info");
-       texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
-       textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
-       gltexnuminuse = Mem_Alloc(texturemempool, MAX_GLTEXTURES);
+       // Disable JPEG screenshots if the DLL isn't loaded
+       if (! JPEG_OpenLibrary ())
+               Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
+       // TODO: support png screenshots?
+       PNG_OpenLibrary ();
 }
 
 static void r_textures_shutdown(void)
 {
        rtexturepool_t *temp;
+
+       JPEG_CloseLibrary ();
+
        while(gltexturepoolchain)
        {
                temp = (rtexturepool_t *) gltexturepoolchain;
@@ -488,10 +471,7 @@ static void r_textures_shutdown(void)
        resizebuffer = NULL;
        colorconvertbuffer = NULL;
        texturebuffer = NULL;
-       gltexnuminuse = NULL;
        Mem_FreePool(&texturemempool);
-       Mem_FreePool(&texturedatamempool);
-       Mem_FreePool(&textureprocessingmempool);
 }
 
 static void r_textures_newmap(void)
@@ -500,580 +480,491 @@ static void r_textures_newmap(void)
 
 void R_Textures_Init (void)
 {
-       Cmd_AddCommand ("gl_texturemode", &GL_TextureMode_f);
-       Cmd_AddCommand("r_texturestats", R_TextureStats_f);
-       Cvar_RegisterVariable (&r_max_scrapsize);
-       Cvar_RegisterVariable (&r_max_size);
-       Cvar_RegisterVariable (&r_picmip);
+       Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
+       Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
+       Cvar_RegisterVariable (&gl_max_size);
+       Cvar_RegisterVariable (&gl_picmip);
        Cvar_RegisterVariable (&r_lerpimages);
        Cvar_RegisterVariable (&r_precachetextures);
-       gltexnuminuse = NULL;
+       Cvar_RegisterVariable (&gl_texture_anisotropy);
 
        R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 }
 
-static void R_Upload(gltexture_t *glt, qbyte *data)
+void R_Textures_Frame (void)
 {
-       int mip, width, height, internalformat;
-       qbyte *prevbuffer;
-       prevbuffer = data;
+       static int old_aniso = 0;
 
-       qglBindTexture(GL_TEXTURE_2D, glt->image->texnum);
-       CHECKGLERROR
-
-       gl_backend_rebindtextures = true;
+       // could do procedural texture animation here, if we keep track of which
+       // textures were accessed this frame...
 
-       glt->flags &= ~GLTEXF_UPLOAD;
+       // free the resize buffers
+       resizebuffersize = 0;
+       if (resizebuffer)
+       {
+               Mem_Free(resizebuffer);
+               resizebuffer = NULL;
+       }
+       if (colorconvertbuffer)
+       {
+               Mem_Free(colorconvertbuffer);
+               colorconvertbuffer = NULL;
+       }
 
-       if (glt->flags & TEXF_FRAGMENT)
+       if (old_aniso != gl_texture_anisotropy.integer)
        {
-               if (resizebuffersize < glt->image->width * glt->image->height * glt->image->bytesperpixel)
-               {
-                       resizebuffersize = glt->image->width * glt->image->height * glt->image->bytesperpixel;
-                       if (resizebuffer)
-                               Mem_Free(resizebuffer);
-                       if (colorconvertbuffer)
-                               Mem_Free(colorconvertbuffer);
-                       resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
-                       colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
-                       if (!resizebuffer || !colorconvertbuffer)
-                               Host_Error("R_Upload: out of memory\n");
-               }
+               gltexture_t *glt;
+               gltexturepool_t *pool;
+               GLint oldbindtexnum;
 
-               if (glt->image->flags & GLTEXF_UPLOAD)
-               {
-                       Con_DPrintf("uploaded new fragments image\n");
-                       glt->image->flags &= ~GLTEXF_UPLOAD;
-                       memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->bytesperpixel);
-                       qglTexImage2D (GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
-                       CHECKGLERROR
-                       qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
-                       CHECKGLERROR
-                       qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
-                       CHECKGLERROR
-               }
+               old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 
-               if (prevbuffer == NULL)
-               {
-                       memset(resizebuffer, 255, glt->width * glt->height * glt->image->bytesperpixel);
-                       prevbuffer = resizebuffer;
-               }
-               else if (glt->textype->textype == TEXTYPE_QPALETTE)
-               {
-                       // promote paletted to RGBA, so we only have to worry about RGB and
-                       // RGBA in the rest of this code
-                       Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
-                       prevbuffer = colorconvertbuffer;
-               }
+               Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 
-               qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
-               CHECKGLERROR
-               return;
-       }
+               for (pool = gltexturepoolchain;pool;pool = pool->next)
+               {
+                       for (glt = pool->gltchain;glt;glt = glt->chain)
+                       {
+                               // only update already uploaded images
+                               if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
+                               {
+                                       qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);
 
-       glt->image->flags &= ~GLTEXF_UPLOAD;
+                                       qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);
+                                       qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 
-       // these are rounded up versions of the size to do better resampling
-       for (width = 1;width < glt->width;width <<= 1);
-       for (height = 1;height < glt->height;height <<= 1);
+                                       qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);
+                               }
+                       }
+               }
+       }
+}
 
-       if (resizebuffersize < width * height * glt->image->bytesperpixel)
+void R_MakeResizeBufferBigger(int size)
+{
+       if (resizebuffersize < size)
        {
-               resizebuffersize = width * height * glt->image->bytesperpixel;
+               resizebuffersize = size;
                if (resizebuffer)
                        Mem_Free(resizebuffer);
                if (colorconvertbuffer)
                        Mem_Free(colorconvertbuffer);
-               resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
-               colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
+               resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
+               colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
                if (!resizebuffer || !colorconvertbuffer)
-                       Host_Error("R_Upload: out of memory\n");
+                       Host_Error("R_Upload: out of memory");
        }
+}
 
-       if (prevbuffer == NULL)
+static void GL_SetupTextureParameters(int flags, int texturetype)
+{
+       int textureenum = gltexturetypeenums[texturetype];
+       int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
+
+       CHECKGLERROR
+
+       if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
        {
-               width = glt->image->width;
-               height = glt->image->height;
-               memset(resizebuffer, 255, width * height * glt->image->bytesperpixel);
-               prevbuffer = resizebuffer;
+               int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
+               if (gl_texture_anisotropy.integer != aniso)
+                       Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
+               qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
        }
-       else
+       qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
+       qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
+       if (gltexturetypedimensions[texturetype] >= 3)
        {
-               if (glt->textype->textype == TEXTYPE_QPALETTE)
-               {
-                       // promote paletted to RGBA, so we only have to worry about RGB and
-                       // RGBA in the rest of this code
-                       Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
-                       prevbuffer = colorconvertbuffer;
-               }
+               qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
+       }
 
-               if (glt->width != width || glt->height != height)
+       CHECKGLERROR
+       if (flags & TEXF_FORCENEAREST)
+       {
+               if (flags & TEXF_MIPMAP)
                {
-                       Image_Resample(prevbuffer, glt->width, glt->height, resizebuffer, width, height, glt->image->bytesperpixel, r_lerpimages.integer);
-                       prevbuffer = resizebuffer;
+                       qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
                }
-
-               // apply picmip/max_size limitations
-               while (width > glt->image->width || height > glt->image->height)
+               else
                {
-                       Image_MipReduce(prevbuffer, resizebuffer, &width, &height, glt->image->width, glt->image->height, glt->image->bytesperpixel);
-                       prevbuffer = resizebuffer;
+                       qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
                }
+               qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
        }
-
-       // 3 and 4 are converted by the driver to it's preferred format for the current display mode
-       internalformat = 3;
-       if (glt->flags & TEXF_ALPHA)
-               internalformat = 4;
-
-       mip = 0;
-       qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
-       CHECKGLERROR
-       if (glt->flags & TEXF_MIPMAP)
+       else if (flags & TEXF_FORCELINEAR)
        {
-               while (width > 1 || height > 1)
+               if (flags & TEXF_MIPMAP)
                {
-                       Image_MipReduce(prevbuffer, resizebuffer, &width, &height, 1, 1, glt->image->bytesperpixel);
-                       prevbuffer = resizebuffer;
-
-                       qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
-                       CHECKGLERROR
+                       if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
+                       {
+                               qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
+                       }
+                       else
+                       {
+                               qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
+                       }
                }
-
-               qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
-               CHECKGLERROR
-               qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
-               CHECKGLERROR
+               else
+               {
+                       qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
+               }
+               qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
        }
        else
        {
-               qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
-               CHECKGLERROR
-               qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
-               CHECKGLERROR
+               if (flags & TEXF_MIPMAP)
+               {
+                       qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
+               }
+               else
+               {
+                       qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
+               }
+               qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
        }
+
+       CHECKGLERROR
 }
 
-static void R_FindImageForTexture(gltexture_t *glt)
+static void R_Upload(gltexture_t *glt, unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
 {
-       int i, j, best, best2, x, y, w, h;
-       textypeinfo_t *texinfo;
-       gltexturepool_t *pool;
-       gltextureimage_t *image, **imagechainpointer;
-       texinfo = glt->textype;
-       pool = glt->pool;
-
-       x = 0;
-       y = 0;
-       w = glt->width;
-       h = glt->height;
-       if (glt->flags & TEXF_FRAGMENT)
-       {
-               for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
-               {
-                       image = *imagechainpointer;
-                       if (image->type != GLIMAGETYPE_FRAGMENTS)
-                               continue;
-                       if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
-                               continue;
-
-                       // got a fragments texture, find a place in it if we can
-                       best = block_size;
-                       for (best = block_size, i = 0;i < block_size - w;i += texinfo->align)
-                       {
-                               for (best2 = 0, j = 0;j < w;j++)
-                               {
-                                       if (image->blockallocation[i+j] >= best)
-                                               break;
-                                       if (best2 < image->blockallocation[i+j])
-                                               best2 = image->blockallocation[i+j];
-                               }
-                               if (j == w)
-                               {
-                                       // this is a valid spot
-                                       x = i;
-                                       y = best = best2;
-                               }
-                       }
+       int i, mip, width, height, depth;
+       GLint oldbindtexnum;
+       unsigned char *prevbuffer;
+       prevbuffer = data;
 
-                       if (best + h > block_size)
-                               continue;
+       CHECKGLERROR
 
-                       for (i = 0;i < w;i++)
-                               image->blockallocation[x + i] = best + h;
+       // we need to restore the texture binding after finishing the upload
+       qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);
+       qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);
+       CHECKGLERROR
 
-                       glt->x = x;
-                       glt->y = y;
-                       glt->image = image;
-                       image->texturecount++;
-                       return;
-               }
+       R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
 
-               image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
-               if (image == NULL)
-                       Sys_Error("R_FindImageForTexture: ran out of memory\n");
-               image->type = GLIMAGETYPE_FRAGMENTS;
-               image->width = block_size;
-               image->height = block_size;
-               image->blockallocation = Mem_Alloc(texturemempool, block_size * sizeof(short));
-               memset(image->blockallocation, 0, block_size * sizeof(short));
-
-               x = 0;
-               y = 0;
-               for (i = 0;i < w;i++)
-                       image->blockallocation[x + i] = y + h;
+       if (prevbuffer == NULL)
+       {
+               memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
+               prevbuffer = resizebuffer;
        }
-       else
+       else if (glt->textype->textype == TEXTYPE_PALETTE)
        {
-               for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
-
-               image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
-               if (image == NULL)
-                       Sys_Error("R_FindImageForTexture: ran out of memory\n");
-               image->type = GLIMAGETYPE_TILE;
-               image->blockallocation = NULL;
-
-               // calculate final size
-               if (r_max_size.integer > realmaxsize)
-                       Cvar_SetValue("r_max_size", realmaxsize);
-               for (image->width = 1;image->width < glt->width;image->width <<= 1);
-               for (image->height = 1;image->height < glt->height;image->height <<= 1);
-               for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
-               for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
-               if (image->width < 1) image->width = 1;
-               if (image->height < 1) image->height = 1;
+               // promote paletted to RGBA, so we only have to worry about RGB and
+               // RGBA in the rest of this code
+               Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
+               prevbuffer = colorconvertbuffer;
        }
-       image->glinternalformat = texinfo->glinternalformat;
-       image->glformat = texinfo->glformat;
-       image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA)) | GLTEXF_UPLOAD;
-       image->bytesperpixel = texinfo->internalbytesperpixel;
-       for (i = 1;i < MAX_GLTEXTURES;i++)
-               if (!gltexnuminuse[i])
-                       break;
-       if (i < MAX_GLTEXTURES)
-               gltexnuminuse[image->texnum = i] = true;
-       else
-               Sys_Error("R_FindImageForTexture: ran out of GL textures\n");
-       *imagechainpointer = image;
-       image->texturecount++;
 
-       glt->x = x;
-       glt->y = y;
-       glt->image = image;
-}
+       // these are rounded up versions of the size to do better resampling
+       for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
+       for (height = 1;height < glt->inputheight;height <<= 1);
+       for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
 
-// note: R_FindImageForTexture must be called before this
-static void R_UploadTexture (gltexture_t *glt)
-{
-       if (!(glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL)))
-               return;
+       R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
 
-       if (glt->flags & GLTEXF_PROCEDURAL)
+       if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0)
        {
-               if (glt->generate)
+               // update a portion of the image
+               switch(glt->texturetype)
                {
-                       if (texturebuffersize < glt->width * glt->height * glt->textype->inputbytesperpixel)
-                       {
-                               if (texturebuffer)
-                                       Mem_Free(texturebuffer);
-                               texturebuffersize = glt->width * glt->height * glt->textype->inputbytesperpixel;
-                               texturebuffer = Mem_Alloc(textureprocessingmempool, texturebuffersize);
-                       }
-
-                       glt->generate(texturebuffer, glt->width, glt->height, (void *)glt->proceduraldata, glt->proceduraldatasize);
+               case GLTEXTURETYPE_1D:
+                       qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                       CHECKGLERROR
+                       break;
+               case GLTEXTURETYPE_2D:
+                       qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                       CHECKGLERROR
+                       break;
+               case GLTEXTURETYPE_3D:
+                       qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                       CHECKGLERROR
+                       break;
+               default:
+                       Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
+                       break;
                }
        }
        else
        {
-               R_Upload(glt, glt->inputtexels);
-               if (glt->inputtexels)
+               if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
+                       Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
+
+               // upload the image for the first time
+               glt->flags &= ~GLTEXF_UPLOAD;
+
+               // cubemaps contain multiple images and thus get processed a bit differently
+               if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
                {
-                       Mem_Free(glt->inputtexels);
-                       glt->inputtexels = NULL;
-                       glt->flags |= GLTEXF_DESTROYED;
+                       if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
+                       {
+                               Image_Resample(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, glt->bytesperpixel, r_lerpimages.integer);
+                               prevbuffer = resizebuffer;
+                       }
+                       // picmip/max_size
+                       while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
+                       {
+                               Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth, glt->bytesperpixel);
+                               prevbuffer = resizebuffer;
+                       }
                }
-               else if (glt->flags & GLTEXF_DESTROYED)
-                       Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
+               mip = 0;
+               switch(glt->texturetype)
+               {
+               case GLTEXTURETYPE_1D:
+                       qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                       CHECKGLERROR
+                       if (glt->flags & TEXF_MIPMAP)
+                       {
+                               while (width > 1 || height > 1 || depth > 1)
+                               {
+                                       Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
+                                       prevbuffer = resizebuffer;
+                                       qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                                       CHECKGLERROR
+                               }
+                       }
+                       break;
+               case GLTEXTURETYPE_2D:
+                       qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                       CHECKGLERROR
+                       if (glt->flags & TEXF_MIPMAP)
+                       {
+                               while (width > 1 || height > 1 || depth > 1)
+                               {
+                                       Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
+                                       prevbuffer = resizebuffer;
+                                       qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                                       CHECKGLERROR
+                               }
+                       }
+                       break;
+               case GLTEXTURETYPE_3D:
+                       qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                       CHECKGLERROR
+                       if (glt->flags & TEXF_MIPMAP)
+                       {
+                               while (width > 1 || height > 1 || depth > 1)
+                               {
+                                       Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
+                                       prevbuffer = resizebuffer;
+                                       qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                                       CHECKGLERROR
+                               }
+                       }
+                       break;
+               case GLTEXTURETYPE_CUBEMAP:
+                       // convert and upload each side in turn,
+                       // from a continuous block of input texels
+                       texturebuffer = prevbuffer;
+                       for (i = 0;i < 6;i++)
+                       {
+                               prevbuffer = texturebuffer;
+                               texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
+                               if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
+                               {
+                                       Image_Resample(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, glt->bytesperpixel, r_lerpimages.integer);
+                                       prevbuffer = resizebuffer;
+                               }
+                               // picmip/max_size
+                               while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
+                               {
+                                       Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth, glt->bytesperpixel);
+                                       prevbuffer = resizebuffer;
+                               }
+                               mip = 0;
+                               qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                               CHECKGLERROR
+                               if (glt->flags & TEXF_MIPMAP)
+                               {
+                                       while (width > 1 || height > 1 || depth > 1)
+                                       {
+                                               Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
+                                               prevbuffer = resizebuffer;
+                                               qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
+                                               CHECKGLERROR
+                                       }
+                               }
+                       }
+                       break;
+               }
+               GL_SetupTextureParameters(glt->flags, glt->texturetype);
        }
+       qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);
 }
 
-static gltexture_t *R_SetupTexture(gltexturepool_t *pool, char *identifier, int crc, int width, int height, int flags, textypeinfo_t *texinfo, qbyte *data, int (*generate)(qbyte *buffer, int width, int height, void *proceduraldata, int proceduraldatasize), void *proceduraldata, int proceduraldatasize)
+static void R_UploadTexture (gltexture_t *glt)
 {
-       gltexture_t *glt;
-       glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
-       if (identifier)
-       {
-               glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
-               strcpy (glt->identifier, identifier);
-       }
-       else
-               glt->identifier = NULL;
-       glt->pool = pool;
-       glt->chain = pool->gltchain;
-       pool->gltchain = glt;
-       glt->crc = crc;
-       glt->width = width;
-       glt->height = height;
-       glt->flags = flags;
-       glt->textype = texinfo;
+       if (!(glt->flags & GLTEXF_UPLOAD))
+               return;
 
-       if (data)
+       qglGenTextures(1, (GLuint *)&glt->texnum);
+       R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
+       if (glt->inputtexels)
        {
-               glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * texinfo->inputbytesperpixel);
-               if (glt->inputtexels == NULL)
-                       Sys_Error("R_SetupTexture: out of memory\n");
-               memcpy(glt->inputtexels, data, glt->width * glt->height * texinfo->inputbytesperpixel);
-       }
-       else
+               Mem_Free(glt->inputtexels);
                glt->inputtexels = NULL;
-
-       glt->generate = generate;
-       glt->proceduraldatasize = proceduraldatasize;
-       if (proceduraldatasize)
-       {
-               glt->proceduraldata = Mem_Alloc(texturemempool, proceduraldatasize);
-               if (glt->proceduraldata == NULL)
-                       Sys_Error("R_SetupTexture: out of memory\n");
+               glt->flags |= GLTEXF_DESTROYED;
        }
-       else
-               glt->proceduraldata = NULL;
-
-       R_FindImageForTexture(glt);
-       R_PrecacheTexture(glt);
-
-       return glt;
+       else if (glt->flags & GLTEXF_DESTROYED)
+               Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 }
 
-/*
-================
-R_LoadTexture
-================
-*/
-rtexture_t *R_LoadTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, qbyte *data, int textype, int flags)
+static rtexture_t *R_SetupTexture(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, int sides, int flags, int textype, int texturetype, const unsigned char *data, const unsigned int *palette)
 {
-       int i;
+       int i, size;
        gltexture_t *glt;
        gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
        textypeinfo_t *texinfo;
-       unsigned short crc;
 
        if (cls.state == ca_dedicated)
                return NULL;
 
-       texinfo = R_GetTexTypeInfo(textype, flags);
+       if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
+       {
+               Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
+               return NULL;
+       }
+       if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
+       {
+               Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
+               return NULL;
+       }
 
-       if (flags & TEXF_FRAGMENT)
+       texinfo = R_GetTexTypeInfo(textype, flags);
+       size = width * height * depth * sides * texinfo->inputbytesperpixel;
+       if (size < 1)
        {
-               if (width > block_size || height > block_size)
-                       Host_Error("R_LoadTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
-               if ((width * texinfo->internalbytesperpixel) & 3)
-                       Host_Error("R_LoadTexture: incompatible width for fragment");
+               Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
+               return NULL;
        }
 
        // clear the alpha flag if the texture has no transparent pixels
        switch(textype)
        {
-       case TEXTYPE_QPALETTE:
+       case TEXTYPE_PALETTE:
                if (flags & TEXF_ALPHA)
                {
                        flags &= ~TEXF_ALPHA;
-                       for (i = 0;i < width * height;i++)
+                       if (data)
                        {
-                               if (data[i] == 255)
+                               for (i = 0;i < size;i++)
                                {
-                                       flags |= TEXF_ALPHA;
-                                       break;
+                                       if (((unsigned char *)&palette[data[i]])[3] < 255)
+                                       {
+                                               flags |= TEXF_ALPHA;
+                                               break;
+                                       }
                                }
                        }
                }
                break;
        case TEXTYPE_RGB:
                if (flags & TEXF_ALPHA)
-                       Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
+                       Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA");
                break;
        case TEXTYPE_RGBA:
                if (flags & TEXF_ALPHA)
                {
                        flags &= ~TEXF_ALPHA;
-                       for (i = 0;i < width * height;i++)
+                       if (data)
                        {
-                               if (data[i * 4 + 3] < 255)
+                               for (i = 3;i < size;i += 4)
                                {
-                                       flags |= TEXF_ALPHA;
-                                       break;
+                                       if (data[i] < 255)
+                                       {
+                                               flags |= TEXF_ALPHA;
+                                               break;
+                                       }
                                }
                        }
                }
                break;
        default:
-               Host_Error("R_LoadTexture: unknown texture type\n");
+               Host_Error("R_LoadTexture: unknown texture type");
        }
 
-       // LordHavoc: do a CRC to confirm the data really is the same as previous occurances.
-       if (data == NULL)
-               crc = 0;
-       else
-               crc = CRC_Block(data, width*height*texinfo->inputbytesperpixel);
+       glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
+       if (identifier)
+               strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
+       glt->pool = pool;
+       glt->chain = pool->gltchain;
+       pool->gltchain = glt;
+       glt->inputwidth = width;
+       glt->inputheight = height;
+       glt->inputdepth = depth;
+       glt->flags = flags | GLTEXF_UPLOAD;
+       glt->textype = texinfo;
+       glt->texturetype = texturetype;
+       glt->inputdatasize = size;
+       glt->palette = palette;
+       glt->glinternalformat = texinfo->glinternalformat;
+       glt->glformat = texinfo->glformat;
+       glt->bytesperpixel = texinfo->internalbytesperpixel;
+       glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
+       glt->texnum = -1;
 
-       // see if the texture is already present
-       if (identifier && (glt = R_FindTexture(pool, identifier)))
+       if (data)
        {
-               if (crc == glt->crc && width == glt->width && height == glt->height && texinfo == glt->textype && ((flags ^ glt->flags) & TEXF_IMPORTANTBITS) == 0 && ((flags ^ glt->flags) & GLTEXF_IMPORTANTBITS) == 0)
-               {
-                       Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
-                       return (rtexture_t *)glt; // exact match, use existing
-               }
-               Con_Printf("R_LoadTexture: cache mismatch on %s, replacing old texture\n", identifier);
-               R_FreeTexture(glt);
+               glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
+               memcpy(glt->inputtexels, data, size);
        }
+       else
+               glt->inputtexels = NULL;
 
-       return (rtexture_t *)R_SetupTexture(pool, identifier, crc, width, height, flags | GLTEXF_UPLOAD, texinfo, data, NULL, NULL, 0);
+       GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
+       R_PrecacheTexture(glt);
+
+       return (rtexture_t *)glt;
 }
 
-rtexture_t *R_ProceduralTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, int textype, int flags, int (*generate)(qbyte *buffer, int width, int height, void *proceduraldata, int proceduraldatasize), void *proceduraldata, int proceduraldatasize)
+rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 {
-       gltexture_t             *glt;
-       gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
-       textypeinfo_t   *texinfo;
-
-       if (cls.state == ca_dedicated)
-               return NULL;
-
-       texinfo = R_GetTexTypeInfo(textype, flags);
-
-       if (flags & TEXF_FRAGMENT)
-       {
-               if (width > block_size || height > block_size)
-                       Host_Error("R_ProceduralTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
-               if ((width * texinfo->internalbytesperpixel) & 3)
-                       Host_Error("R_ProceduralTexture: incompatible width for fragment");
-       }
-
-       // see if the texture is already present
-       if (identifier && (glt = R_FindTexture(pool, identifier)))
-       {
-               if (width == glt->width && height == glt->height && texinfo == glt->textype && ((flags ^ glt->flags) & TEXF_IMPORTANTBITS) == 0 && ((flags ^ glt->flags) & GLTEXF_IMPORTANTBITS) == 0)
-               {
-                       Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
-                       return (rtexture_t *)glt; // exact match, use existing
-               }
-               Con_Printf("R_LoadTexture: cache mismatch, replacing old texture\n");
-               R_FreeTexture(glt);
-       }
+       return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
+}
 
-       return (rtexture_t *)R_SetupTexture(pool, identifier, 0, width, height, flags | GLTEXF_PROCEDURAL | GLTEXF_UPLOAD, texinfo, NULL, generate, proceduraldata, proceduraldatasize);
+rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const unsigned char *data, int textype, int flags, const unsigned int *palette)
+{
+       return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
 }
 
-int R_TextureHasAlpha(rtexture_t *rt)
+rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 {
-       gltexture_t *glt;
-       if (!rt)
-               return false;
-       glt = (gltexture_t *)rt;
-       return (glt->flags & TEXF_ALPHA) != 0;
+       return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
 }
 
-int R_TextureWidth(rtexture_t *rt)
+rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 {
-       if (!rt)
-               return false;
-       return ((gltexture_t *)rt)->width;
+       return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
 }
 
-int R_TextureHeight(rtexture_t *rt)
+int R_TextureHasAlpha(rtexture_t *rt)
 {
-       if (!rt)
-               return false;
-       return ((gltexture_t *)rt)->height;
+       return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
 }
 
-void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
+int R_TextureWidth(rtexture_t *rt)
 {
-       gltexture_t *glt;
-       float iwidth, iheight;
-       if (cls.state == ca_dedicated)
-       {
-               if (x)
-                       *x = 0;
-               if (y)
-                       *y = 0;
-               if (fx1 || fy1 || fx2 || fy2)
-               {
-                       if (fx1)
-                               *fx1 = 0;
-                       if (fy1)
-                               *fy1 = 0;
-                       if (fx2)
-                               *fx2 = 1;
-                       if (fy2)
-                               *fy2 = 1;
-               }
-               return;
-       }
-       if (!rt)
-               Host_Error("R_FragmentLocation: no texture supplied\n");
-       glt = (gltexture_t *)rt;
-       if (glt->flags & TEXF_FRAGMENT)
-       {
-               if (x)
-                       *x = glt->x;
-               if (y)
-                       *y = glt->y;
-               if (fx1 || fy1 || fx2 || fy2)
-               {
-                       iwidth = 1.0f / glt->image->width;
-                       iheight = 1.0f / glt->image->height;
-                       if (fx1)
-                               *fx1 = glt->x * iwidth;
-                       if (fy1)
-                               *fy1 = glt->y * iheight;
-                       if (fx2)
-                               *fx2 = (glt->x + glt->width) * iwidth;
-                       if (fy2)
-                               *fy2 = (glt->y + glt->height) * iheight;
-               }
-       }
-       else
-       {
-               if (x)
-                       *x = 0;
-               if (y)
-                       *y = 0;
-               if (fx1 || fy1 || fx2 || fy2)
-               {
-                       if (fx1)
-                               *fx1 = 0;
-                       if (fy1)
-                               *fy1 = 0;
-                       if (fx2)
-                               *fx2 = 1;
-                       if (fy2)
-                               *fy2 = 1;
-               }
-       }
+       return rt ? ((gltexture_t *)rt)->inputwidth : 0;
 }
 
-int R_CompatibleFragmentWidth(int width, int textype, int flags)
+int R_TextureHeight(rtexture_t *rt)
 {
-       textypeinfo_t *texinfo = R_GetTexTypeInfo(textype, flags);
-       while ((width * texinfo->internalbytesperpixel) & 3)
-               width++;
-       return width;
+       return rt ? ((gltexture_t *)rt)->inputheight : 0;
 }
 
-void R_UpdateTexture(rtexture_t *rt, qbyte *data)
+void R_UpdateTexture(rtexture_t *rt, unsigned char *data, int x, int y, int width, int height)
 {
        gltexture_t *glt;
        if (rt == NULL)
-               Host_Error("R_UpdateTexture: no texture supplied\n");
+               Host_Error("R_UpdateTexture: no texture supplied");
        if (data == NULL)
-               Host_Error("R_UpdateTexture: no data supplied\n");
+               Host_Error("R_UpdateTexture: no data supplied");
        glt = (gltexture_t *)rt;
 
-       // if it has not been uploaded yet, update the data that will be used when it is
-       if (glt->inputtexels)
-               memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
-       else
-               R_Upload(glt, data);
+       // we need it to be uploaded before we can update a part of it
+       if (glt->flags & GLTEXF_UPLOAD)
+               R_UploadTexture(glt);
+
+       // update part of the texture
+       R_Upload(glt, data, x, y, 0, width, height, 1);
 }