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https://github.com/holub/mame
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03447: gauntdl, gauntdl24, gauntleg, gauntleg12: Texture with alpha channel is not drawn properly. [Phil Bennett]
voodoo - Fixed alpha test to run on the alpha combiner output and not on a_other. Do the test before the color combiner steps to potentially save some effort. [Phil Bennett]
This commit is contained in:
Phil Bennett
parent
ef7cb0e4fb
commit
ae6b21b1a3
@ -3328,25 +3328,6 @@ do
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/* handle alpha mask */ \
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APPLY_ALPHAMASK(VV, STATS, FBZMODE, c_other.rgb.a); \
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\
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/* handle alpha test */ \
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APPLY_ALPHATEST(VV, STATS, ALPHAMODE, c_other.rgb.a); \
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\
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/* compute c_local */ \
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if (FBZCP_CC_LOCALSELECT_OVERRIDE(FBZCOLORPATH) == 0) \
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{ \
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if (FBZCP_CC_LOCALSELECT(FBZCOLORPATH) == 0) /* iterated RGB */ \
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c_local.u = ITERARGB.u; \
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else /* color0 RGB */ \
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c_local.u = (VV)->reg[color0].u; \
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} \
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else \
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{ \
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if (!(TEXELARGB.rgb.a & 0x80)) /* iterated RGB */ \
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c_local.u = ITERARGB.u; \
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else /* color0 RGB */ \
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c_local.u = (VV)->reg[color0].u; \
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} \
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\
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/* compute a_local */ \
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switch (FBZCP_CCA_LOCALSELECT(FBZCOLORPATH)) \
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{ \
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@ -3376,6 +3357,79 @@ do
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} \
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} \
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\
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/* select zero or a_other */ \
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if (FBZCP_CCA_ZERO_OTHER(FBZCOLORPATH) == 0) \
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a = c_other.rgb.a; \
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else \
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a = 0; \
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\
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/* subtract a_local */ \
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if (FBZCP_CCA_SUB_CLOCAL(FBZCOLORPATH)) \
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a -= c_local.rgb.a; \
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\
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/* blend alpha */ \
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switch (FBZCP_CCA_MSELECT(FBZCOLORPATH)) \
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{ \
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default: /* reserved */ \
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case 0: /* 0 */ \
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blenda = 0; \
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break; \
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\
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case 1: /* a_local */ \
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blenda = c_local.rgb.a; \
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break; \
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\
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case 2: /* a_other */ \
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blenda = c_other.rgb.a; \
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break; \
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\
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case 3: /* a_local */ \
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blenda = c_local.rgb.a; \
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break; \
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\
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case 4: /* texture alpha */ \
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blenda = TEXELARGB.rgb.a; \
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break; \
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} \
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\
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/* reverse the alpha blend */ \
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if (!FBZCP_CCA_REVERSE_BLEND(FBZCOLORPATH)) \
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blenda ^= 0xff; \
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\
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/* do the blend */ \
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a = (a * (blenda + 1)) >> 8; \
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\
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/* add clocal or alocal to alpha */ \
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if (FBZCP_CCA_ADD_ACLOCAL(FBZCOLORPATH)) \
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a += c_local.rgb.a; \
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\
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/* clamp */ \
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CLAMP(a, 0x00, 0xff); \
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\
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/* invert */ \
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if (FBZCP_CCA_INVERT_OUTPUT(FBZCOLORPATH)) \
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a ^= 0xff; \
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\
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/* handle alpha test */ \
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APPLY_ALPHATEST(VV, STATS, ALPHAMODE, a); \
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\
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\
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/* compute c_local */ \
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if (FBZCP_CC_LOCALSELECT_OVERRIDE(FBZCOLORPATH) == 0) \
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{ \
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if (FBZCP_CC_LOCALSELECT(FBZCOLORPATH) == 0) /* iterated RGB */ \
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c_local.u = ITERARGB.u; \
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else /* color0 RGB */ \
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c_local.u = (VV)->reg[color0].u; \
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} \
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else \
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{ \
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if (!(TEXELARGB.rgb.a & 0x80)) /* iterated RGB */ \
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c_local.u = ITERARGB.u; \
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else /* color0 RGB */ \
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c_local.u = (VV)->reg[color0].u; \
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} \
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\
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/* select zero or c_other */ \
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if (FBZCP_CC_ZERO_OTHER(FBZCOLORPATH) == 0) \
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{ \
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@ -3386,12 +3440,6 @@ do
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else \
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r = g = b = 0; \
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\
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/* select zero or a_other */ \
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if (FBZCP_CCA_ZERO_OTHER(FBZCOLORPATH) == 0) \
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a = c_other.rgb.a; \
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else \
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a = 0; \
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\
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/* subtract c_local */ \
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if (FBZCP_CC_SUB_CLOCAL(FBZCOLORPATH)) \
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{ \
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@ -3400,10 +3448,6 @@ do
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b -= c_local.rgb.b; \
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} \
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\
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/* subtract a_local */ \
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if (FBZCP_CCA_SUB_CLOCAL(FBZCOLORPATH)) \
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a -= c_local.rgb.a; \
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\
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/* blend RGB */ \
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switch (FBZCP_CC_MSELECT(FBZCOLORPATH)) \
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{ \
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@ -3437,31 +3481,6 @@ do
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break; \
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} \
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\
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/* blend alpha */ \
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switch (FBZCP_CCA_MSELECT(FBZCOLORPATH)) \
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{ \
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default: /* reserved */ \
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case 0: /* 0 */ \
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blenda = 0; \
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break; \
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\
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case 1: /* a_local */ \
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blenda = c_local.rgb.a; \
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break; \
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\
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case 2: /* a_other */ \
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blenda = c_other.rgb.a; \
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break; \
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\
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case 3: /* a_local */ \
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blenda = c_local.rgb.a; \
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break; \
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\
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case 4: /* texture alpha */ \
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blenda = TEXELARGB.rgb.a; \
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break; \
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} \
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\
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/* reverse the RGB blend */ \
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if (!FBZCP_CC_REVERSE_BLEND(FBZCOLORPATH)) \
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{ \
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@ -3470,15 +3489,10 @@ do
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blendb ^= 0xff; \
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} \
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\
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/* reverse the alpha blend */ \
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if (!FBZCP_CCA_REVERSE_BLEND(FBZCOLORPATH)) \
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blenda ^= 0xff; \
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\
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/* do the blend */ \
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r = (r * (blendr + 1)) >> 8; \
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g = (g * (blendg + 1)) >> 8; \
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b = (b * (blendb + 1)) >> 8; \
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a = (a * (blenda + 1)) >> 8; \
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\
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/* add clocal or alocal to RGB */ \
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switch (FBZCP_CC_ADD_ACLOCAL(FBZCOLORPATH)) \
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@ -3500,15 +3514,10 @@ do
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break; \
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} \
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\
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/* add clocal or alocal to alpha */ \
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if (FBZCP_CCA_ADD_ACLOCAL(FBZCOLORPATH)) \
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a += c_local.rgb.a; \
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\
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/* clamp */ \
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CLAMP(r, 0x00, 0xff); \
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CLAMP(g, 0x00, 0xff); \
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CLAMP(b, 0x00, 0xff); \
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CLAMP(a, 0x00, 0xff); \
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\
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/* invert */ \
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if (FBZCP_CC_INVERT_OUTPUT(FBZCOLORPATH)) \
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@ -3517,8 +3526,6 @@ do
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g ^= 0xff; \
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b ^= 0xff; \
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} \
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if (FBZCP_CCA_INVERT_OUTPUT(FBZCOLORPATH)) \
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a ^= 0xff; \
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} \
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while (0)
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