static GLboolean multipass_cliprect( struct gl_context *ctx, GLuint pass )
{
sisContextPtr smesa = SIS_CONTEXT( ctx );
if (pass >= smesa->driDrawable->numClipRects) {
return GL_FALSE;
} else {
GLint x1, y1, x2, y2;
x1 = smesa->driDrawable->pClipRects[pass].x1 - smesa->driDrawable->x;
y1 = smesa->driDrawable->pClipRects[pass].y1 - smesa->driDrawable->y;
x2 = smesa->driDrawable->pClipRects[pass].x2 - smesa->driDrawable->x;
y2 = smesa->driDrawable->pClipRects[pass].y2 - smesa->driDrawable->y;
if (ctx->Scissor.Enabled) {
GLint scisy1 = Y_FLIP(ctx->Scissor.Y + ctx->Scissor.Height - 1);
GLint scisy2 = Y_FLIP(ctx->Scissor.Y);
if (ctx->Scissor.X > x1)
x1 = ctx->Scissor.X;
if (scisy1 > y1)
y1 = scisy1;
if (ctx->Scissor.X + ctx->Scissor.Width - 1 < x2)
x2 = ctx->Scissor.X + ctx->Scissor.Width - 1;
if (scisy2 < y2)
y2 = scisy2;
}
MMIO(REG_3D_ClipTopBottom, y1 << 13 | y2);
MMIO(REG_3D_ClipLeftRight, x1 << 13 | x2);
/* Mark that we clobbered these registers */
smesa->GlobalFlag |= GFLAG_CLIPPING;
return GL_TRUE;
}
}
void
sis6326UpdateClipping(GLcontext *ctx)
{
sisContextPtr smesa = SIS_CONTEXT(ctx);
__GLSiSHardware *prev = &smesa->prev;
__GLSiSHardware *current = &smesa->current;
GLint x1, y1, x2, y2;
x1 = 0;
y1 = 0;
x2 = smesa->width - 1;
y2 = smesa->height - 1;
if (ctx->Scissor.Enabled) {
if (ctx->Scissor.X > x1)
x1 = ctx->Scissor.X;
if (ctx->Scissor.Y > y1)
y1 = ctx->Scissor.Y;
if (ctx->Scissor.X + ctx->Scissor.Width - 1 < x2)
x2 = ctx->Scissor.X + ctx->Scissor.Width - 1;
if (ctx->Scissor.Y + ctx->Scissor.Height - 1 < y2)
y2 = ctx->Scissor.Y + ctx->Scissor.Height - 1;
}
y1 = Y_FLIP(y1);
y2 = Y_FLIP(y2);
/*current->clipTopBottom = (y2 << 13) | y1;
current->clipLeftRight = (x1 << 13) | x2;*/ /* XXX */
current->clipTopBottom = (0 << 13) | smesa->height;
current->clipLeftRight = (0 << 13) | smesa->width;
if ((current->clipTopBottom != prev->clipTopBottom) ||
(current->clipLeftRight != prev->clipLeftRight)) {
prev->clipTopBottom = current->clipTopBottom;
prev->clipLeftRight = current->clipLeftRight;
smesa->GlobalFlag |= GFLAG_CLIPPING;
}
}
