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DS GX: Fix vertex texture transformation (fixes #702)

This commit is contained in:
Vicki Pfau 2017-04-26 23:57:08 -07:00
parent e211869c92
commit 71916913e9
2 changed files with 10 additions and 9 deletions
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2
CHANGES
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@ -1,6 +1,8 @@
medusa alpha 3 (Future)
Features:
- DS GX: Toon shading
Bugfixes:
- DS GX: Fix vertex texture transformation (fixes mgba.io/i/702)
0.6.0: (Future)
Features:

17
src/ds/gx.c
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@ -385,7 +385,7 @@ static int32_t _dotViewport(struct DSGXVertex* vertex, int32_t* col) {
static int16_t _dotTexture(struct DSGXVertex* vertex, int mode, int32_t* col) {
int64_t a;
int64_t b;
int64_t sum;
int64_t sum = 0;
switch (mode) {
case 1:
a = col[0];
@ -400,24 +400,23 @@ static int16_t _dotTexture(struct DSGXVertex* vertex, int mode, int32_t* col) {
a = col[12];
b = MTX_ONE >> 4;
sum += a * b;
break;
case 2:
return 0;
return sum >> 20;
case 3:
a = col[0];
b = vertex->viewCoord[0] << 8;
b = vertex->coord[0];
sum = a * b;
a = col[4];
b = vertex->viewCoord[1] << 8;
b = vertex->coord[1];
sum += a * b;
a = col[8];
b = vertex->viewCoord[2] << 8;
b = vertex->coord[2];
sum += a * b;
a = col[12];
a = col[12] << 12;
b = MTX_ONE;
sum += a * b;
return sum >> 24;
}
return sum >> 20;
return 0;
}
static int32_t _dotFrac(int16_t x, int16_t y, int16_t z, int32_t* col) {