diff options
| -rw-r--r-- | src/mesa/swrast/s_span.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c index b74f62b6c68..0abeaec1355 100644 --- a/src/mesa/swrast/s_span.c +++ b/src/mesa/swrast/s_span.c @@ -126,7 +126,17 @@ _swrast_span_default_texcoords( GLcontext *ctx, struct sw_span *span ) { GLuint i; for (i = 0; i < ctx->Const.MaxTextureUnits; i++) { - COPY_4V(span->tex[i], ctx->Current.RasterTexCoords[i]); + const GLfloat *tc = ctx->Current.RasterTexCoords[i]; + if (tc[3] > 0.0F) { + /* use (s/q, t/q, r/q, 1) */ + span->tex[i][0] = tc[0] / tc[3]; + span->tex[i][1] = tc[1] / tc[3]; + span->tex[i][2] = tc[2] / tc[3]; + span->tex[i][3] = 1.0; + } + else { + ASSIGN_4V(span->tex[i], 0.0F, 0.0F, 0.0F, 1.0F); + } ASSIGN_4V(span->texStepX[i], 0.0F, 0.0F, 0.0F, 0.0F); ASSIGN_4V(span->texStepY[i], 0.0F, 0.0F, 0.0F, 0.0F); } |