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Rename functions, make more efficient, fix subtractive in Software

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This commit is contained in:
Jaime Ita Passos 2021-03-30 22:12:31 -03:00
parent eece82c481
commit 59be35e533
2 changed files with 53 additions and 42 deletions
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3
src/hardware/hw_main.c
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@ -707,6 +707,7 @@ FBITFIELD HWR_GetBlendModeFlag(INT32 ast)
switch (ast)
{
case AST_COPY:
case AST_OVERLAY:
return PF_Masked;
case AST_ADD:
return PF_Additive;
@ -746,7 +747,7 @@ UINT8 HWR_GetTranstableAlpha(INT32 transtablenum)
FBITFIELD HWR_SurfaceBlend(INT32 style, INT32 transtablenum, FSurfaceInfo *pSurf)
{
if (!transtablenum || style == AST_COPY)
if (!transtablenum || style == AST_COPY || style == AST_OVERLAY)
{
pSurf->PolyColor.s.alpha = 0xff;
return PF_Masked;

92
src/r_draw.c
View file

@ -173,14 +173,12 @@ static INT32 CacheIndexToSkin(INT32 ttc)
CV_PossibleValue_t Color_cons_t[MAXSKINCOLORS+1];
#define TRANSTAB_AMTMUL10 (256.0f / 10.0f)
/** \brief Initializes the translucency tables used by the Software renderer.
*/
void R_InitTranslucencyTables(void)
{
// Load here the transparency lookup tables 'TINTTAB'
// NOTE: the TINTTAB resource MUST BE aligned on 64k for the asm
// Load here the transparency lookup tables 'TRANSx0'
// NOTE: the TRANSx0 resources MUST BE aligned on 64k for the asm
// optimised code (in other words, transtables pointer low word is 0)
transtables = Z_MallocAlign(NUMTRANSTABLES*0x10000, PU_STATIC,
NULL, 16);
@ -200,12 +198,12 @@ void R_InitTranslucencyTables(void)
static colorlookup_t transtab_lut;
static void R_GenerateTranslucencyTable(UINT8 *table, int style, UINT8 blendamt)
static void BlendTab_Translucent(UINT8 *table, int style, UINT8 blendamt)
{
INT16 bg, fg;
if (table == NULL)
I_Error("R_GenerateTranslucencyTable: input table was NULL!");
I_Error("BlendTab_Translucent: input table was NULL!");
for (bg = 0; bg < 0xFF; bg++)
{
@ -223,15 +221,14 @@ static void R_GenerateTranslucencyTable(UINT8 *table, int style, UINT8 blendamt)
}
}
static void R_GenerateSubtractiveTable(UINT8 *table, int style, UINT8 blendamt)
static void BlendTab_Subtractive(UINT8 *table, int style, UINT8 blendamt)
{
INT16 bg, fg;
if (table == NULL)
I_Error("R_GenerateSubtractiveTable: input table was NULL!");
I_Error("BlendTab_Subtractive: input table was NULL!");
blendamt = 0xFF - blendamt;
if (!blendamt)
if (blendamt == 0xFF)
{
memset(table, GetColorLUT(&transtab_lut, 0, 0, 0), 0x10000);
return;
@ -246,21 +243,21 @@ static void R_GenerateSubtractiveTable(UINT8 *table, int style, UINT8 blendamt)
RGBA_t result;
result.rgba = ASTBlendPixel(backrgba, frontrgba, style, 0xFF);
result.s.red = (result.s.red * blendamt) / 0xFF;
result.s.green = (result.s.green * blendamt) / 0xFF;
result.s.blue = (result.s.blue * blendamt) / 0xFF;
result.s.red = max(0, result.s.red - blendamt);
result.s.green = max(0, result.s.green - blendamt);
result.s.blue = max(0, result.s.blue - blendamt);
table[((bg * 0x100) + fg)] = GetColorLUT(&transtab_lut, result.s.red, result.s.green, result.s.blue);
}
}
}
static void R_GenerateModulationTable(UINT8 *table)
static void BlendTab_Modulative(UINT8 *table)
{
INT16 bg, fg;
if (table == NULL)
I_Error("R_GenerateModulationTable: input table was NULL!");
I_Error("BlendTab_Modulative: input table was NULL!");
for (bg = 0; bg < 0xFF; bg++)
{
@ -275,21 +272,33 @@ static void R_GenerateModulationTable(UINT8 *table)
}
}
static INT32 R_GetBlendTableCount(INT32 style)
static INT32 BlendTab_Count[NUMBLENDMAPS] =
{
INT32 count = NUMTRANSTABLES;
if (style == blendtab_subtract || style == blendtab_reversesubtract)
count++;
return count;
}
NUMTRANSTABLES, // blendtab_add
NUMTRANSTABLES+1, // blendtab_subtract
NUMTRANSTABLES+1, // blendtab_reversesubtract
1 // blendtab_modulate
};
static void R_GenerateBlendTableMaps(INT32 tab, INT32 style, void (*genfunc)(UINT8 *, int, UINT8))
static INT32 BlendTab_FromStyle[] =
{
INT32 i = 0;
for (; i <= R_GetBlendTableCount(tab); i++)
0, // AST_COPY
0, // AST_TRANSLUCENT
blendtab_add, // AST_ADD
blendtab_subtract, // AST_SUBTRACT
blendtab_reversesubtract, // AST_REVERSESUBTRACT
blendtab_modulate, // AST_MODULATE
0 // AST_OVERLAY
};
static void BlendTab_GenerateMaps(INT32 tab, INT32 style, void (*genfunc)(UINT8 *, int, UINT8))
{
INT32 i = 0, num = BlendTab_Count[tab];
const float amtmul = (256.0f / (float)(NUMTRANSTABLES));
for (; i < num; i++)
{
const size_t offs = (0x10000 * i);
const UINT16 alpha = min(TRANSTAB_AMTMUL10 * i, 0xFF);
const UINT16 alpha = min(amtmul * i, 0xFF);
genfunc(blendtables[tab] + offs, style, alpha);
}
}
@ -299,33 +308,28 @@ void R_GenerateBlendTables(void)
INT32 i;
for (i = 0; i < NUMBLENDMAPS; i++)
{
if (i == blendtab_modulate)
continue;
blendtables[i] = Z_MallocAlign((R_GetBlendTableCount(i) + 1) * 0x10000, PU_STATIC, NULL, 16);
}
blendtables[i] = Z_MallocAlign(BlendTab_Count[i] * 0x10000, PU_STATIC, NULL, 16);
InitColorLUT(&transtab_lut, pMasterPalette, false);
// Additive
R_GenerateBlendTableMaps(blendtab_add, AST_ADD, R_GenerateTranslucencyTable);
BlendTab_GenerateMaps(blendtab_add, AST_ADD, BlendTab_Translucent);
// Subtractive
#if 1
R_GenerateBlendTableMaps(blendtab_subtract, AST_SUBTRACT, R_GenerateSubtractiveTable);
BlendTab_GenerateMaps(blendtab_subtract, AST_SUBTRACT, BlendTab_Subtractive);
#else
R_GenerateBlendTableMaps(blendtab_subtract, AST_SUBTRACT, R_GenerateTranslucencyTable);
BlendTab_GenerateMaps(blendtab_subtract, AST_SUBTRACT, BlendTab_Translucent);
#endif
// Reverse subtractive
R_GenerateBlendTableMaps(blendtab_reversesubtract, AST_REVERSESUBTRACT, R_GenerateTranslucencyTable);
BlendTab_GenerateMaps(blendtab_reversesubtract, AST_REVERSESUBTRACT, BlendTab_Translucent);
// Modulation blending only requires a single table
blendtables[blendtab_modulate] = Z_MallocAlign(0x10000, PU_STATIC, NULL, 16);
R_GenerateModulationTable(blendtables[blendtab_modulate]);
// Modulative blending only requires a single table
BlendTab_Modulative(blendtables[blendtab_modulate]);
}
#define ClipBlendLevel(style, trans) max(min((trans), R_GetBlendTableCount(style)+1), 0)
#define ClipBlendLevel(style, trans) max(min((trans), BlendTab_Count[BlendTab_FromStyle[style]]-1), 0)
#define ClipTransLevel(trans) max(min((trans), NUMTRANSMAPS-2), 0)
UINT8 *R_GetTranslucencyTable(INT32 alphalevel)
@ -335,7 +339,12 @@ UINT8 *R_GetTranslucencyTable(INT32 alphalevel)
UINT8 *R_GetBlendTable(int style, INT32 alphalevel)
{
size_t offs = (ClipBlendLevel(style, alphalevel) << FF_TRANSSHIFT);
size_t offs;
if (style == AST_COPY || style == AST_OVERLAY)
return NULL;
offs = (ClipBlendLevel(style, alphalevel) << FF_TRANSSHIFT);
// Lactozilla: Returns the equivalent to AST_TRANSLUCENT
// if no alpha style matches any of the blend tables.
@ -362,9 +371,10 @@ UINT8 *R_GetBlendTable(int style, INT32 alphalevel)
boolean R_BlendLevelVisible(INT32 blendmode, INT32 alphalevel)
{
if (blendmode == AST_COPY || blendmode == AST_SUBTRACT || blendmode == AST_MODULATE)
if (blendmode == AST_COPY || blendmode == AST_SUBTRACT || blendmode == AST_MODULATE || blendmode == AST_OVERLAY)
return true;
return (alphalevel < R_GetBlendTableCount(blendmode));
return (alphalevel < BlendTab_Count[BlendTab_FromStyle[blendmode]]);
}
// Define for getting accurate color brightness readings according to how the human eye sees them.