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Kart-Public/src/hardware/hw_cache.c

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// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 1993-1996 by id Software, Inc.
// Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 1999-2019 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file
/// \brief load and convert graphics to the hardware format
#include "../doomdef.h"
#ifdef HWRENDER
#include "hw_main.h"
#include "hw_glob.h"
#include "hw_drv.h"
#include "../doomstat.h" //gamemode
#include "../i_video.h" //rendermode
#include "../r_data.h"
#include "../w_wad.h"
#include "../z_zone.h"
#include "../v_video.h"
#include "../r_draw.h"
// Values set after a call to HWR_ResizeBlock()
static INT32 blocksize, blockwidth, blockheight;
INT32 patchformat = GR_TEXFMT_AP_88; // use alpha for holes
INT32 textureformat = GR_TEXFMT_P_8; // use chromakey for hole
// sprite, use alpha and chroma key for hole
static void HWR_DrawPatchInCache(GLMipmap_t *mipmap,
INT32 pblockwidth, INT32 pblockheight, INT32 blockmodulo,
INT32 ptexturewidth, INT32 ptextureheight,
INT32 originx, INT32 originy, // where to draw patch in surface block
const patch_t *realpatch, INT32 bpp)
{
INT32 x, x1, x2;
INT32 col, ncols;
fixed_t xfrac, xfracstep;
fixed_t yfrac, yfracstep, position, count;
fixed_t scale_y;
RGBA_t colortemp;
UINT8 *dest;
const UINT8 *source;
const column_t *patchcol;
UINT8 alpha;
UINT8 *block = mipmap->grInfo.data;
UINT8 texel;
UINT16 texelu16;
x1 = originx;
x2 = x1 + SHORT(realpatch->width);
if (x1 < 0)
x = 0;
else
x = x1;
if (x2 > ptexturewidth)
x2 = ptexturewidth;
if (!ptexturewidth)
return;
col = x * pblockwidth / ptexturewidth;
ncols = ((x2 - x) * pblockwidth) / ptexturewidth;
/*
CONS_Debug(DBG_RENDER, "patch %dx%d texture %dx%d block %dx%d\n", SHORT(realpatch->width),
SHORT(realpatch->height),
ptexturewidth,
textureheight,
pblockwidth,pblockheight);
CONS_Debug(DBG_RENDER, " col %d ncols %d x %d\n", col, ncols, x);
*/
// source advance
xfrac = 0;
if (x1 < 0)
xfrac = -x1<<FRACBITS;
xfracstep = (ptexturewidth << FRACBITS) / pblockwidth;
yfracstep = (ptextureheight<< FRACBITS) / pblockheight;
if (bpp < 1 || bpp > 4)
I_Error("HWR_DrawPatchInCache: no drawer defined for this bpp (%d)\n",bpp);
for (block += col*bpp; ncols--; block += bpp, xfrac += xfracstep)
{
INT32 topdelta, prevdelta = -1;
patchcol = (const column_t *)((const UINT8 *)realpatch
+ LONG(realpatch->columnofs[xfrac>>FRACBITS]));
scale_y = (pblockheight << FRACBITS) / ptextureheight;
while (patchcol->topdelta != 0xff)
{
topdelta = patchcol->topdelta;
if (topdelta <= prevdelta)
topdelta += prevdelta;
prevdelta = topdelta;
source = (const UINT8 *)patchcol + 3;
count = ((patchcol->length * scale_y) + (FRACUNIT/2)) >> FRACBITS;
position = originy + topdelta;
yfrac = 0;
//yfracstep = (patchcol->length << FRACBITS) / count;
if (position < 0)
{
yfrac = -position<<FRACBITS;
count += (((position * scale_y) + (FRACUNIT/2)) >> FRACBITS);
position = 0;
}
position = ((position * scale_y) + (FRACUNIT/2)) >> FRACBITS;
if (position < 0)
position = 0;
if (position + count >= pblockheight)
count = pblockheight - position;
dest = block + (position*blockmodulo);
while (count > 0)
{
count--;
texel = source[yfrac>>FRACBITS];
alpha = 0xff;
//Hurdler: not perfect, but better than holes
if (texel == HWR_PATCHES_CHROMAKEY_COLORINDEX && (mipmap->flags & TF_CHROMAKEYED))
alpha = 0x00;
//texel = HWR_CHROMAKEY_EQUIVALENTCOLORINDEX;
// Lat: Don't do that, some weirdos still use CYAN on their WALLTEXTURES for translucency :V
//Hurdler: 25/04/2000: now support colormap in hardware mode
if (mipmap->colormap)
texel = mipmap->colormap[texel];
// hope compiler will get this switch out of the loops (dreams...)
// gcc do it ! but vcc not ! (why don't use cygwin gcc for win32 ?)
// Alam: SRB2 uses Mingw, HUGS
switch (bpp)
{
case 2 : texelu16 = (UINT16)((alpha<<8) | texel);
memcpy(dest, &texelu16, sizeof(UINT16));
break;
case 3 : colortemp = V_GetColor(texel);
memcpy(dest, &colortemp, sizeof(RGBA_t)-sizeof(UINT8));
break;
case 4 : colortemp = V_GetColor(texel);
colortemp.s.alpha = alpha;
memcpy(dest, &colortemp, sizeof(RGBA_t));
break;
// default is 1
default: *dest = texel;
break;
}
dest += blockmodulo;
yfrac += yfracstep;
}
patchcol = (const column_t *)((const UINT8 *)patchcol + patchcol->length + 4);
}
}
}
// resize the patch
// set : blocksize = blockwidth * blockheight (no bpp used)
// blockwidth
// blockheight
//note : 8bit (1 byte per pixel) palettized format
static void HWR_ResizeBlock(INT32 originalwidth, INT32 originalheight,
GLTexInfo *grInfo)
{
// Build the full textures from patches.
static const GLlod_t gr_lods[9] =
{
GR_LOD_LOG2_256,
GR_LOD_LOG2_128,
GR_LOD_LOG2_64,
GR_LOD_LOG2_32,
GR_LOD_LOG2_16,
GR_LOD_LOG2_8,
GR_LOD_LOG2_4,
GR_LOD_LOG2_2,
GR_LOD_LOG2_1
};
typedef struct
{
GLAspectRatio_t aspect;
float max_s;
float max_t;
} booring_aspect_t;
static const booring_aspect_t gr_aspects[8] =
{
{GR_ASPECT_LOG2_1x1, 255, 255},
{GR_ASPECT_LOG2_2x1, 255, 127},
{GR_ASPECT_LOG2_4x1, 255, 63},
{GR_ASPECT_LOG2_8x1, 255, 31},
{GR_ASPECT_LOG2_1x1, 255, 255},
{GR_ASPECT_LOG2_1x2, 127, 255},
{GR_ASPECT_LOG2_1x4, 63, 255},
{GR_ASPECT_LOG2_1x8, 31, 255}
};
INT32 j,k;
INT32 max,min;
// size up to nearest power of 2
blockwidth = 1;
while (blockwidth < originalwidth)
blockwidth <<= 1;
// scale down the original graphics to fit in 2048
if (blockwidth > 2048)
blockwidth = 2048;
// size up to nearest power of 2
blockheight = 1;
while (blockheight < originalheight)
blockheight <<= 1;
// scale down the original graphics to fit in 2048
if (blockheight > 2048)
blockheight = 2048;
// do the boring LOD stuff.. blech!
if (blockwidth >= blockheight)
{
max = blockwidth;
min = blockheight;
}
else
{
max = blockheight;
min = blockwidth;
}
for (k = 2048, j = 0; k > max; j++)
k>>=1;
grInfo->smallLodLog2 = gr_lods[j];
grInfo->largeLodLog2 = gr_lods[j];
for (k = max, j = 0; k > min && j < 4; j++)
k>>=1;
// aspect ratio too small for 3Dfx (eg: 8x128 is 1x16 : use 1x8)
if (j == 4)
{
j = 3;
//CONS_Debug(DBG_RENDER, "HWR_ResizeBlock : bad aspect ratio %dx%d\n", blockwidth,blockheight);
if (blockwidth < blockheight)
blockwidth = max>>3;
else
blockheight = max>>3;
}
if (blockwidth < blockheight)
j += 4;
grInfo->aspectRatioLog2 = gr_aspects[j].aspect;
blocksize = blockwidth * blockheight;
//CONS_Debug(DBG_RENDER, "Width is %d, Height is %d\n", blockwidth, blockheight);
}
static const INT32 format2bpp[16] =
{
0, //0
0, //1
1, //2 GR_TEXFMT_ALPHA_8
1, //3 GR_TEXFMT_INTENSITY_8
1, //4 GR_TEXFMT_ALPHA_INTENSITY_44
1, //5 GR_TEXFMT_P_8
4, //6 GR_RGBA
0, //7
0, //8
0, //9
2, //10 GR_TEXFMT_RGB_565
2, //11 GR_TEXFMT_ARGB_1555
2, //12 GR_TEXFMT_ARGB_4444
2, //13 GR_TEXFMT_ALPHA_INTENSITY_88
2, //14 GR_TEXFMT_AP_88
};
static UINT8 *MakeBlock(GLMipmap_t *grMipmap)
{
UINT8 *block;
INT32 bpp, i;
UINT16 bu16 = ((0x00 <<8) | HWR_PATCHES_CHROMAKEY_COLORINDEX);
bpp = format2bpp[grMipmap->grInfo.format];
block = Z_Malloc(blocksize*bpp, PU_HWRCACHE, &(grMipmap->grInfo.data));
switch (bpp)
{
case 1: memset(block, HWR_PATCHES_CHROMAKEY_COLORINDEX, blocksize); break;
case 2:
// fill background with chromakey, alpha = 0
for (i = 0; i < blocksize; i++)
memcpy(block+i*sizeof(UINT16), &bu16, sizeof(UINT16));
break;
case 4: memset(block, 0x00, blocksize*sizeof(UINT32)); break;
}
return block;
}
//
// Create a composite texture from patches, adapt the texture size to a power of 2
// height and width for the hardware texture cache.
//
static void HWR_GenerateTexture(INT32 texnum, GLTexture_t *grtex)
{
UINT8 *block;
texture_t *texture;
texpatch_t *patch;
patch_t *realpatch;
INT32 i;
boolean skyspecial = false; //poor hack for Legacy large skies..
texture = textures[texnum];
// hack the Legacy skies..
if (texture->name[0] == 'S' &&
texture->name[1] == 'K' &&
texture->name[2] == 'Y' &&
(texture->name[4] == 0 ||
texture->name[5] == 0)
)
{
skyspecial = true;
grtex->mipmap.flags = TF_WRAPXY; // don't use the chromakey for sky
}
else
grtex->mipmap.flags = TF_CHROMAKEYED | TF_WRAPXY;
HWR_ResizeBlock (texture->width, texture->height, &grtex->mipmap.grInfo);
grtex->mipmap.width = (UINT16)blockwidth;
grtex->mipmap.height = (UINT16)blockheight;
grtex->mipmap.grInfo.format = textureformat;
grtex->mipmap.colormap = colormaps;
#ifdef GLENCORE
if (encoremap)
grtex->mipmap.colormap += (256*32);
#endif
block = MakeBlock(&grtex->mipmap);
if (skyspecial) //Hurdler: not efficient, but better than holes in the sky (and it's done only at level loading)
{
INT32 j;
RGBA_t col;
col = V_GetColor(HWR_CHROMAKEY_EQUIVALENTCOLORINDEX);
for (j = 0; j < blockheight; j++)
{
for (i = 0; i < blockwidth; i++)
{
block[4*(j*blockwidth+i)+0] = col.s.red;
block[4*(j*blockwidth+i)+1] = col.s.green;
block[4*(j*blockwidth+i)+2] = col.s.blue;
block[4*(j*blockwidth+i)+3] = 0xff;
}
}
}
// Composite the columns together.
for (i = 0, patch = texture->patches; i < texture->patchcount; i++, patch++)
{
realpatch = W_CacheLumpNumPwad(patch->wad, patch->lump, PU_CACHE);
HWR_DrawPatchInCache(&grtex->mipmap,
blockwidth, blockheight,
blockwidth*format2bpp[grtex->mipmap.grInfo.format],
texture->width, texture->height,
patch->originx, patch->originy,
realpatch,
format2bpp[grtex->mipmap.grInfo.format]);
Z_Unlock(realpatch);
}
//Hurdler: not efficient at all but I don't remember exactly how HWR_DrawPatchInCache works :(
if (format2bpp[grtex->mipmap.grInfo.format]==4)
{
for (i = 3; i < blocksize*4; i += 4) // blocksize*4 because blocksize doesn't include the bpp
{
if (block[i] == 0)
{
grtex->mipmap.flags |= TF_TRANSPARENT;
break;
}
}
}
grtex->scaleX = 1.0f/(texture->width*FRACUNIT);
grtex->scaleY = 1.0f/(texture->height*FRACUNIT);
}
// patch may be NULL if grMipmap has been initialised already and makebitmap is false
void HWR_MakePatch (patch_t *patch, GLPatch_t *grPatch, GLMipmap_t *grMipmap, boolean makebitmap)
{
INT32 newwidth, newheight;
// don't do it twice (like a cache)
if (grMipmap->width == 0)
{
// save the original patch header so that the GLPatch can be casted
// into a standard patch_t struct and the existing code can get the
// orginal patch dimensions and offsets.
grPatch->width = SHORT(patch->width);
grPatch->height = SHORT(patch->height);
grPatch->leftoffset = SHORT(patch->leftoffset);
grPatch->topoffset = SHORT(patch->topoffset);
// resize patch
HWR_ResizeBlock(SHORT(patch->width), SHORT(patch->height), &grMipmap->grInfo);
grMipmap->width = (UINT16)blockwidth;
grMipmap->height = (UINT16)blockheight;
// no wrap around, no chroma key
grMipmap->flags = 0;
// setup the texture info
grMipmap->grInfo.format = patchformat;
}
else
{
blockwidth = grMipmap->width;
blockheight = grMipmap->height;
blocksize = blockwidth * blockheight;
}
Z_Free(grMipmap->grInfo.data);
grMipmap->grInfo.data = NULL;
newwidth = min(grPatch->width, blockwidth);
newheight = min(grPatch->height, blockheight);
if (makebitmap)
{
MakeBlock(grMipmap);
HWR_DrawPatchInCache(grMipmap,
newwidth, newheight,
blockwidth*format2bpp[grMipmap->grInfo.format],
grPatch->width, grPatch->height,
0, 0,
patch,
format2bpp[grMipmap->grInfo.format]);
}
grPatch->max_s = (float)newwidth / (float)blockwidth;
grPatch->max_t = (float)newheight / (float)blockheight;
}
// =================================================
// CACHING HANDLING
// =================================================
static size_t gr_numtextures;
static GLTexture_t *gr_textures; // for ALL Doom textures
void HWR_InitTextureCache(void)
{
gr_numtextures = 0;
gr_textures = NULL;
}
// Callback function for HWR_FreeTextureCache.
static void FreeMipmapColormap(INT32 patchnum, void *patch)
{
GLPatch_t* const grpatch = patch;
(void)patchnum; //unused
while (grpatch->mipmap->nextcolormap)
{
GLMipmap_t *grmip = grpatch->mipmap->nextcolormap;
grpatch->mipmap->nextcolormap = grmip->nextcolormap;
if (grmip->grInfo.data) Z_Free(grmip->grInfo.data);
free(grmip);
}
}
void HWR_FreeTextureCache(void)
{
INT32 i;
// free references to the textures
HWD.pfnClearMipMapCache();
// free all hardware-converted graphics cached in the heap
// our gool is only the textures since user of the texture is the texture cache
Z_FreeTags(PU_HWRCACHE, PU_HWRCACHE);
Z_FreeTags(PU_HWRCACHE_UNLOCKED, PU_HWRCACHE_UNLOCKED);
// Alam: free the Z_Blocks before freeing it's users
// free all skin after each level: must be done after pfnClearMipMapCache!
for (i = 0; i < numwadfiles; i++)
M_AATreeIterate(wadfiles[i]->hwrcache, FreeMipmapColormap);
// now the heap don't have any 'user' pointing to our
// texturecache info, we can free it
if (gr_textures)
free(gr_textures);
gr_textures = NULL;
gr_numtextures = 0;
}
void HWR_PrepLevelCache(size_t pnumtextures)
{
// problem: the mipmap cache management hold a list of mipmaps.. but they are
// reallocated on each level..
//sub-optimal, but 1) just need re-download stuff in hardware cache VERY fast
// 2) sprite/menu stuff mixed with level textures so can't do anything else
// we must free it since numtextures changed
HWR_FreeTextureCache();
gr_numtextures = pnumtextures;
gr_textures = calloc(pnumtextures, sizeof (*gr_textures));
if (gr_textures == NULL)
I_Error("HWR_PrepLevelCache: can't alloc gr_textures");
}
void HWR_SetPalette(RGBA_t *palette)
{
//Hudler: 16/10/99: added for OpenGL gamma correction
RGBA_t gamma_correction = {0x7F7F7F7F};
//Hurdler 16/10/99: added for OpenGL gamma correction
gamma_correction.s.red = (UINT8)cv_grgammared.value;
gamma_correction.s.green = (UINT8)cv_grgammagreen.value;
gamma_correction.s.blue = (UINT8)cv_grgammablue.value;
HWD.pfnSetPalette(palette, &gamma_correction);
// hardware driver will flush there own cache if cache is non paletized
// now flush data texture cache so 32 bit texture are recomputed
if (patchformat == GR_RGBA || textureformat == GR_RGBA)
{
Z_FreeTags(PU_HWRCACHE, PU_HWRCACHE);
Z_FreeTags(PU_HWRCACHE_UNLOCKED, PU_HWRCACHE_UNLOCKED);
}
}
// --------------------------------------------------------------------------
// Make sure texture is downloaded and set it as the source
// --------------------------------------------------------------------------
GLTexture_t *HWR_GetTexture(INT32 tex)
{
GLTexture_t *grtex;
#ifdef PARANOIA
if ((unsigned)tex >= gr_numtextures)
I_Error("HWR_GetTexture: tex >= numtextures\n");
#endif
grtex = &gr_textures[tex];
if (!grtex->mipmap.grInfo.data && !grtex->mipmap.downloaded)
HWR_GenerateTexture(tex, grtex);
HWD.pfnSetTexture(&grtex->mipmap);
// The system-memory data can be purged now.
Z_ChangeTag(grtex->mipmap.grInfo.data, PU_HWRCACHE_UNLOCKED);
return grtex;
}
static void HWR_CacheFlat(GLMipmap_t *grMipmap, lumpnum_t flatlumpnum)
{
#ifdef GLENCORE
UINT8 *flat;
INT32 steppy;
#endif
size_t size, pflatsize;
// setup the texture info
grMipmap->grInfo.smallLodLog2 = GR_LOD_LOG2_64;
grMipmap->grInfo.largeLodLog2 = GR_LOD_LOG2_64;
grMipmap->grInfo.aspectRatioLog2 = GR_ASPECT_LOG2_1x1;
grMipmap->grInfo.format = GR_TEXFMT_P_8;
grMipmap->flags = TF_WRAPXY|TF_CHROMAKEYED;
size = W_LumpLength(flatlumpnum);
switch (size)
{
case 4194304: // 2048x2048 lump
pflatsize = 2048;
break;
case 1048576: // 1024x1024 lump
pflatsize = 1024;
break;
case 262144:// 512x512 lump
pflatsize = 512;
break;
case 65536: // 256x256 lump
pflatsize = 256;
break;
case 16384: // 128x128 lump
pflatsize = 128;
break;
case 1024: // 32x32 lump
pflatsize = 32;
break;
default: // 64x64 lump
pflatsize = 64;
break;
}
grMipmap->width = (UINT16)pflatsize;
grMipmap->height = (UINT16)pflatsize;
// the flat raw data needn't be converted with palettized textures
W_ReadLump(flatlumpnum, Z_Malloc(W_LumpLength(flatlumpnum),
PU_HWRCACHE, &grMipmap->grInfo.data));
#ifdef GLENCORE
flat = grMipmap->grInfo.data;
for (steppy = 0; steppy < size; steppy++)
if (flat[steppy] != HWR_PATCHES_CHROMAKEY_COLORINDEX)
flat[steppy] = grMipmap->colormap[flat[steppy]];
#endif
}
// Download a Doom 'flat' to the hardware cache and make it ready for use
void HWR_GetFlat(lumpnum_t flatlumpnum, boolean noencoremap)
{
GLMipmap_t *grmip;
grmip = HWR_GetCachedGLPatch(flatlumpnum)->mipmap;
grmip->colormap = colormaps;
#ifdef GLENCORE
if (!noencoremap && encoremap)
grmip->colormap += (256*32);
#endif
grmip->colormap = colormaps;
#ifdef GLENCORE
if (!noencoremap && encoremap)
grmip->colormap += (256*32);
#endif
if (!grmip->downloaded && !grmip->grInfo.data)
HWR_CacheFlat(grmip, flatlumpnum);
HWD.pfnSetTexture(grmip);
// The system-memory data can be purged now.
Z_ChangeTag(grmip->grInfo.data, PU_HWRCACHE_UNLOCKED);
}
//
// HWR_LoadMappedPatch(): replace the skin color of the sprite in cache
// : load it first in doom cache if not already
//
static void HWR_LoadMappedPatch(GLMipmap_t *grmip, GLPatch_t *gpatch)
{
if (!grmip->downloaded && !grmip->grInfo.data)
{
patch_t *patch = W_CacheLumpNumPwad(gpatch->wadnum, gpatch->lumpnum, PU_STATIC);
HWR_MakePatch(patch, gpatch, grmip, true);
Z_Free(patch);
}
HWD.pfnSetTexture(grmip);
// The system-memory data can be purged now.
Z_ChangeTag(grmip->grInfo.data, PU_HWRCACHE_UNLOCKED);
}
// -----------------+
// HWR_GetPatch : Download a patch to the hardware cache and make it ready for use
// -----------------+
void HWR_GetPatch(GLPatch_t *gpatch)
{
// is it in hardware cache
if (!gpatch->mipmap->downloaded && !gpatch->mipmap->grInfo.data)
{
// load the software patch, PU_STATIC or the Z_Malloc for hardware patch will
// flush the software patch before the conversion! oh yeah I suffered
patch_t *patch = W_CacheLumpNumPwad(gpatch->wadnum, gpatch->lumpnum, PU_STATIC);
HWR_MakePatch(patch, gpatch, gpatch->mipmap, true);
// this is inefficient.. but the hardware patch in heap is purgeable so it should
// not fragment memory, and besides the REAL cache here is the hardware memory
Z_Free(patch);
}
HWD.pfnSetTexture(gpatch->mipmap);
// The system-memory patch data can be purged now.
Z_ChangeTag(gpatch->mipmap->grInfo.data, PU_HWRCACHE_UNLOCKED);
}
// -------------------+
// HWR_GetMappedPatch : Same as HWR_GetPatch for sprite color
// -------------------+
void HWR_GetMappedPatch(GLPatch_t *gpatch, const UINT8 *colormap)
{
GLMipmap_t *grmip, *newmip;
if (colormap == colormaps || colormap == NULL)
{
// Load the default (green) color in doom cache (temporary?) AND hardware cache
HWR_GetPatch(gpatch);
return;
}
// search for the mimmap
// skip the first (no colormap translated)
for (grmip = gpatch->mipmap; grmip->nextcolormap; )
{
grmip = grmip->nextcolormap;
if (grmip->colormap == colormap)
{
HWR_LoadMappedPatch(grmip, gpatch);
return;
}
}
// not found, create it!
// If we are here, the sprite with the current colormap is not already in hardware memory
//BP: WARNING: don't free it manually without clearing the cache of harware renderer
// (it have a liste of mipmap)
// this malloc is cleared in HWR_FreeTextureCache
// (...) unfortunately z_malloc fragment alot the memory :(so malloc is better
newmip = calloc(1, sizeof (*newmip));
if (newmip == NULL)
I_Error("%s: Out of memory", "HWR_GetMappedPatch");
grmip->nextcolormap = newmip;
newmip->colormap = colormap;
HWR_LoadMappedPatch(newmip, gpatch);
}
void HWR_UnlockCachedPatch(GLPatch_t *gpatch)
{
if (!gpatch)
return;
Z_ChangeTag(gpatch->mipmap->grInfo.data, PU_HWRCACHE_UNLOCKED);
Z_ChangeTag(gpatch, PU_HWRPATCHINFO_UNLOCKED);
}
GLPatch_t *HWR_GetCachedGLPatchPwad(UINT16 wadnum, UINT16 lumpnum)
{
aatree_t *hwrcache = wadfiles[wadnum]->hwrcache;
GLPatch_t *grpatch;
if (!(grpatch = M_AATreeGet(hwrcache, lumpnum)))
{
grpatch = Z_Calloc(sizeof(GLPatch_t), PU_HWRPATCHINFO, NULL);
grpatch->wadnum = wadnum;
grpatch->lumpnum = lumpnum;
grpatch->mipmap = Z_Calloc(sizeof(GLMipmap_t), PU_HWRPATCHINFO, NULL);
M_AATreeSet(hwrcache, lumpnum, grpatch);
}
return grpatch;
}
GLPatch_t *HWR_GetCachedGLPatch(lumpnum_t lumpnum)
{
return HWR_GetCachedGLPatchPwad(WADFILENUM(lumpnum),LUMPNUM(lumpnum));
}
// Need to do this because they aren't powers of 2
static void HWR_DrawFadeMaskInCache(GLMipmap_t *mipmap, INT32 pblockwidth, INT32 pblockheight,
lumpnum_t fademasklumpnum, UINT16 fmwidth, UINT16 fmheight)
{
INT32 i,j;
fixed_t posx, posy, stepx, stepy;
UINT8 *block = mipmap->grInfo.data; // places the data directly into here, it already has the space allocated from HWR_ResizeBlock
UINT8 *flat;
UINT8 *dest, *src, texel;
RGBA_t col;
// Place the flats data into flat
W_ReadLump(fademasklumpnum, Z_Malloc(W_LumpLength(fademasklumpnum),
PU_HWRCACHE, &flat));
stepy = ((INT32)SHORT(fmheight)<<FRACBITS)/pblockheight;
stepx = ((INT32)SHORT(fmwidth)<<FRACBITS)/pblockwidth;
posy = 0;
for (j = 0; j < pblockheight; j++)
{
posx = 0;
dest = &block[j*blockwidth]; // 1bpp
src = &flat[(posy>>FRACBITS)*SHORT(fmwidth)];
for (i = 0; i < pblockwidth;i++)
{
// fademask bpp is always 1, and is used just for alpha
texel = src[(posx)>>FRACBITS];
col = V_GetColor(texel);
*dest = col.s.red; // take the red level of the colour and use it for alpha, as fademasks do
dest++;
posx += stepx;
}
posy += stepy;
}
Z_Free(flat);
}
static void HWR_CacheFadeMask(GLMipmap_t *grMipmap, lumpnum_t fademasklumpnum)
{
size_t size;
UINT16 fmheight = 0, fmwidth = 0;
// setup the texture info
grMipmap->grInfo.format = GR_TEXFMT_ALPHA_8; // put the correct alpha levels straight in so I don't need to convert it later
grMipmap->flags = 0;
size = W_LumpLength(fademasklumpnum);
switch (size)
{
// None of these are powers of 2, so I'll need to do what is done for textures and make them powers of 2 before they can be used
case 256000: // 640x400
fmwidth = 640;
fmheight = 400;
break;
case 64000: // 320x200
fmwidth = 320;
fmheight = 200;
break;
case 16000: // 160x100
fmwidth = 160;
fmheight = 100;
break;
case 4000: // 80x50 (minimum)
fmwidth = 80;
fmheight = 50;
break;
default: // Bad lump
CONS_Alert(CONS_WARNING, "Fade mask lump of incorrect size, ignored\n"); // I should avoid this by checking the lumpnum in HWR_RunWipe
break;
}
// Thankfully, this will still work for this scenario
HWR_ResizeBlock(fmwidth, fmheight, &grMipmap->grInfo);
grMipmap->width = blockwidth;
grMipmap->height = blockheight;
MakeBlock(grMipmap);
HWR_DrawFadeMaskInCache(grMipmap, blockwidth, blockheight, fademasklumpnum, fmwidth, fmheight);
// I DO need to convert this because it isn't power of 2 and we need the alpha
}
void HWR_GetFadeMask(lumpnum_t fademasklumpnum)
{
GLMipmap_t *grmip;
grmip = HWR_GetCachedGLPatch(fademasklumpnum)->mipmap;
if (!grmip->downloaded && !grmip->grInfo.data)
HWR_CacheFadeMask(grmip, fademasklumpnum);
HWD.pfnSetTexture(grmip);
// The system-memory data can be purged now.
Z_ChangeTag(grmip->grInfo.data, PU_HWRCACHE_UNLOCKED);
}
#endif //HWRENDER
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