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Merge branch 'TEXTURES_More' into 'master' 

Transparent patch support in TEXTURES

Adds transparent patch functionality for the TEXTURES format.
Duplicates source-to-cache column drawer functions and adds extra functionality which uses trans tables.
Changes how the column drawer is picked so it's done once per patch instead of per column.

See merge request !72
This commit is contained in:
Monster Iestyn 2017-03-19 16:17:31 -04:00
parent 2d878ff7f2 5877cc40d9
commit a979b425e0
3 changed files with 138 additions and 10 deletions
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2
src/dehacked.c
View File

@ -2898,7 +2898,7 @@ static void readpatch(MYFILE *f, const char *name, UINT16 wad)
char *word2;
char *tmp;
INT32 i = 0, j = 0, value;
texpatch_t patch = {0, 0, UINT16_MAX, UINT16_MAX, 0};
texpatch_t patch = {0, 0, UINT16_MAX, UINT16_MAX, 0, 255, AST_COPY};
// Jump to the texture this patch belongs to, which,
// coincidentally, is always the last one on the buffer cache.

141
src/r_data.c
View File

@ -141,11 +141,14 @@ static INT32 tidcachelen = 0;
// R_DrawColumnInCache
// Clip and draw a column from a patch into a cached post.
//
static inline void R_DrawColumnInCache(column_t *patch, UINT8 *cache, INT32 originy, INT32 cacheheight)
static inline void R_DrawColumnInCache(column_t *patch, UINT8 *cache, texpatch_t *originPatch, INT32 cacheheight, INT32 patchheight)
{
INT32 count, position;
UINT8 *source;
INT32 topdelta, prevdelta = -1;
INT32 originy = originPatch->originy;
(void)patchheight; // This parameter is unused
while (patch->topdelta != 0xff)
{
@ -174,11 +177,16 @@ static inline void R_DrawColumnInCache(column_t *patch, UINT8 *cache, INT32 orig
}
}
static inline void R_DrawFlippedColumnInCache(column_t *patch, UINT8 *cache, INT32 originy, INT32 cacheheight, INT32 patchheight)
//
// R_DrawFlippedColumnInCache
// Similar to R_DrawColumnInCache; it draws the column inverted, however.
//
static inline void R_DrawFlippedColumnInCache(column_t *patch, UINT8 *cache, texpatch_t *originPatch, INT32 cacheheight, INT32 patchheight)
{
INT32 count, position;
UINT8 *source, *dest;
INT32 topdelta, prevdelta = -1;
INT32 originy = originPatch->originy;
while (patch->topdelta != 0xff)
{
@ -212,6 +220,95 @@ static inline void R_DrawFlippedColumnInCache(column_t *patch, UINT8 *cache, INT
}
}
//
// R_DrawTransColumnInCache
// Draws a translucent column into the cache, applying a half-cooked equation to get a proper translucency value (Needs code in R_GenerateTexture()).
//
static inline void R_DrawTransColumnInCache(column_t *patch, UINT8 *cache, texpatch_t *originPatch, INT32 cacheheight, INT32 patchheight)
{
INT32 count, position;
UINT8 *source, *dest;
UINT8 *mytransmap = transtables + ((8*(originPatch->alpha) + 255/8)/(255 - 255/11) << FF_TRANSSHIFT); // The equation's not exact but it works as intended. I'll call it a day for now.
INT32 topdelta, prevdelta = -1;
INT32 originy = originPatch->originy;
(void)patchheight; // This parameter is unused
while (patch->topdelta != 0xff)
{
topdelta = patch->topdelta;
if (topdelta <= prevdelta)
topdelta += prevdelta;
prevdelta = topdelta;
source = (UINT8 *)patch + 3;
count = patch->length;
position = originy + topdelta;
if (position < 0)
{
count += position;
source -= position; // start further down the column
position = 0;
}
if (position + count > cacheheight)
count = cacheheight - position;
dest = cache + position;
if (count > 0)
{
for (; dest < cache + position + count; source++, dest++)
if (*dest != 0xFF) *dest = *(mytransmap + ((*dest)<<8) + (*source));
}
patch = (column_t *)((UINT8 *)patch + patch->length + 4);
}
}
//
// R_DrawTransColumnInCache
// Similar to the one above except that the column is inverted.
//
static inline void R_DrawTransFlippedColumnInCache(column_t *patch, UINT8 *cache, texpatch_t *originPatch, INT32 cacheheight, INT32 patchheight)
{
INT32 count, position;
UINT8 *source, *dest;
UINT8 *mytransmap = transtables + ((8*(originPatch->alpha) + 255/8)/(255 - 255/11) << FF_TRANSSHIFT); // The equation's not exact but it works as intended. I'll call it a day for now.
INT32 topdelta, prevdelta = -1;
INT32 originy = originPatch->originy;
while (patch->topdelta != 0xff)
{
topdelta = patch->topdelta;
if (topdelta <= prevdelta)
topdelta += prevdelta;
prevdelta = topdelta;
topdelta = patchheight-patch->length-topdelta;
source = (UINT8 *)patch + 2 + patch->length; // patch + 3 + (patch->length-1)
count = patch->length;
position = originy + topdelta;
if (position < 0)
{
count += position;
source += position; // start further UP the column
position = 0;
}
if (position + count > cacheheight)
count = cacheheight - position;
dest = cache + position;
if (count > 0)
{
for (; dest < cache + position + count; --source, dest++)
if (*dest != 0xFF) *dest = *(mytransmap + ((*dest)<<8) + (*source));
}
patch = (column_t *)((UINT8 *)patch + patch->length + 4);
}
}
//
// R_GenerateTexture
//
@ -324,6 +421,18 @@ static UINT8 *R_GenerateTexture(size_t texnum)
// Composite the columns together.
for (i = 0, patch = texture->patches; i < texture->patchcount; i++, patch++)
{
static void (*ColumnDrawerPointer)(column_t *, UINT8 *, texpatch_t *, INT32, INT32); // Column drawing function pointer.
if ((patch->style == AST_TRANSLUCENT) && (patch->alpha <= (10*255/11))) // Alpha style set to translucent? Is the alpha small enough for translucency?
{
if (patch->alpha < 255/11) // Is the patch way too translucent? Don't render then.
continue;
ColumnDrawerPointer = (patch->flip & 2) ? R_DrawTransFlippedColumnInCache : R_DrawTransColumnInCache;
}
else
{
ColumnDrawerPointer = (patch->flip & 2) ? R_DrawFlippedColumnInCache : R_DrawColumnInCache;
}
realpatch = W_CacheLumpNumPwad(patch->wad, patch->lump, PU_CACHE);
x1 = patch->originx;
width = SHORT(realpatch->width);
@ -347,10 +456,7 @@ static UINT8 *R_GenerateTexture(size_t texnum)
// generate column ofset lookup
colofs[x] = LONG((x * texture->height) + (texture->width*4));
if (patch->flip & 2)
R_DrawFlippedColumnInCache(patchcol, block + LONG(colofs[x]), patch->originy, texture->height, height);
else
R_DrawColumnInCache(patchcol, block + LONG(colofs[x]), patch->originy, texture->height);
ColumnDrawerPointer(patchcol, block + LONG(colofs[x]), patch, texture->height, height);
}
}
@ -490,11 +596,11 @@ void R_LoadTextures(void)
// Allocate texture column offset table.
texturecolumnofs = (void *)((UINT8 *)textures + (numtextures * sizeof(void *)));
// Allocate texture referencing cache.
texturecache = (void *)((UINT8 *)textures + ((numtextures * sizeof(void *)) * 2));
texturecache = (void *)((UINT8 *)textures + ((numtextures * sizeof(void *)) * 2));
// Allocate texture width mask table.
texturewidthmask = (void *)((UINT8 *)textures + ((numtextures * sizeof(void *)) * 3));
// Allocate texture height mask table.
textureheight = (void *)((UINT8 *)textures + ((numtextures * sizeof(void *)) * 4));
textureheight = (void *)((UINT8 *)textures + ((numtextures * sizeof(void *)) * 4));
// Create translation table for global animation.
texturetranslation = Z_Malloc((numtextures + 1) * sizeof(*texturetranslation), PU_STATIC, NULL);
@ -588,6 +694,8 @@ static texpatch_t *R_ParsePatch(boolean actuallyLoadPatch)
INT16 patchXPos;
INT16 patchYPos;
UINT8 flip = 0;
UINT8 alpha = 255;
enum patchalphastyle style = AST_COPY;
texpatch_t *resultPatch = NULL;
lumpnum_t patchLumpNum;
@ -703,7 +811,20 @@ static texpatch_t *R_ParsePatch(boolean actuallyLoadPatch)
}
while (strcmp(texturesToken,"}")!=0)
{
if (stricmp(texturesToken, "FLIPX")==0)
if (stricmp(texturesToken, "ALPHA")==0)
{
Z_Free(texturesToken);
texturesToken = M_GetToken(NULL);
alpha = 255*strtof(texturesToken, NULL);
}
else if (stricmp(texturesToken, "STYLE")==0)
{
Z_Free(texturesToken);
texturesToken = M_GetToken(NULL);
if(stricmp(texturesToken, "TRANSLUCENT")==0)
style = AST_TRANSLUCENT;
}
else if (stricmp(texturesToken, "FLIPX")==0)
flip |= 1;
else if (stricmp(texturesToken, "FLIPY")==0)
flip |= 2;
@ -736,6 +857,8 @@ static texpatch_t *R_ParsePatch(boolean actuallyLoadPatch)
resultPatch->lump = patchLumpNum & 65535;
resultPatch->wad = patchLumpNum>>16;
resultPatch->flip = flip;
resultPatch->alpha = alpha;
resultPatch->style = style;
// Clean up a little after ourselves
Z_Free(patchName);
// Then return it

5
src/r_data.h
View File

@ -21,6 +21,9 @@
#pragma interface
#endif
// Possible alpha types for a patch.
enum patchalphastyle {AST_COPY, AST_TRANSLUCENT}; // , AST_ADD, AST_SUBTRACT, AST_REVERSESUBTRACT, AST_MODULATE, AST_OVERLAY};
// moved here for r_sky.c (texpatch_t is used)
// A single patch from a texture definition,
@ -32,6 +35,8 @@ typedef struct
INT16 originx, originy;
UINT16 wad, lump;
UINT8 flip; // 1 = flipx, 2 = flipy, 3 = both
UINT8 alpha; // Translucency value
enum patchalphastyle style;
} texpatch_t;
// A maptexturedef_t describes a rectangular texture,