/**
* Makes sure that the proper enables are set for LogicOp, Independant Alpha
* Blend, and Blending. It needs to be called from numerous places where we
* could change the LogicOp or Independant Alpha Blend without subsequent
* calls to glEnable.
*
* \todo
* This function is substantially different from the old i830-specific driver.
* I'm not sure which is correct.
*/
static void
i830EvalLogicOpBlendState(GLcontext * ctx)
{
struct i830_context *i830 = i830_context(ctx);
I830_STATECHANGE(i830, I830_UPLOAD_CTX);
if (RGBA_LOGICOP_ENABLED(ctx)) {
i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~(ENABLE_COLOR_BLEND |
ENABLE_LOGIC_OP_MASK);
i830->state.Ctx[I830_CTXREG_ENABLES_1] |= (DISABLE_COLOR_BLEND |
ENABLE_LOGIC_OP);
}
else if (ctx->Color.BlendEnabled) {
i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~(ENABLE_COLOR_BLEND |
ENABLE_LOGIC_OP_MASK);
i830->state.Ctx[I830_CTXREG_ENABLES_1] |= (ENABLE_COLOR_BLEND |
DISABLE_LOGIC_OP);
}
else {
i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~(ENABLE_COLOR_BLEND |
ENABLE_LOGIC_OP_MASK);
i830->state.Ctx[I830_CTXREG_ENABLES_1] |= (DISABLE_COLOR_BLEND |
DISABLE_LOGIC_OP);
}
}
/**
* Update derived color/blend/logicop state.
*/
static void
update_color(GLcontext *ctx)
{
/* This is needed to support 1.1's RGB logic ops AND
* 1.0's blending logicops.
*/
ctx->Color._LogicOpEnabled = RGBA_LOGICOP_ENABLED(ctx);
}
/* This function makes sure that the proper enables are
* set for LogicOp, Independant Alpha Blend, and Blending.
* It needs to be called from numerous places where we
* could change the LogicOp or Independant Alpha Blend without subsequent
* calls to glEnable.
*/
static void
i915EvalLogicOpBlendState(GLcontext * ctx)
{
struct i915_context *i915 = I915_CONTEXT(ctx);
I915_STATECHANGE(i915, I915_UPLOAD_CTX);
if (RGBA_LOGICOP_ENABLED(ctx)) {
i915->state.Ctx[I915_CTXREG_LIS5] |= S5_LOGICOP_ENABLE;
i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_CBUF_BLEND_ENABLE;
}
else {
i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_LOGICOP_ENABLE;
if (ctx->Color.BlendEnabled) {
i915->state.Ctx[I915_CTXREG_LIS6] |= S6_CBUF_BLEND_ENABLE;
}
else {
i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_CBUF_BLEND_ENABLE;
}
}
}