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lima: glBlend support #17

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Jan 4, 2018
Merged

lima: glBlend support #17

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47 changes: 32 additions & 15 deletions src/gallium/drivers/lima/lima_draw.c
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Original file line number Diff line number Diff line change
Expand Up @@ -505,6 +505,20 @@ lima_blend_factor(enum pipe_blendfactor pipe)
return -1;
}

static int
lima_calculate_alpha_blend(enum pipe_blend_func rgb_func, enum pipe_blend_func alpha_func,
enum pipe_blendfactor rgb_src_factor, enum pipe_blendfactor rgb_dst_factor,
enum pipe_blendfactor alpha_src_factor, enum pipe_blendfactor alpha_dst_factor)
{
return lima_blend_func(rgb_func) |
(lima_blend_func(alpha_func) << 3) |
(lima_blend_factor(rgb_src_factor) << 6) |
(lima_blend_factor(rgb_dst_factor) << 11) |
((lima_blend_factor(alpha_src_factor) & 0xF) << 16) |
((lima_blend_factor(alpha_dst_factor) & 0xF) << 20) |
0xFC000000; /* need check if this GLESv1 glAlphaFunc */
}

static int
lima_stencil_op(enum pipe_stencil_op pipe)
{
Expand Down Expand Up @@ -538,10 +552,7 @@ lima_pack_render_state(struct lima_context *ctx)
struct lima_render_state *render = ctx->pp_buffer->map + pp_plb_rsw_offset +
ctx->buffer_state[lima_ctx_buff_pp_plb_rsw].offset;

/* do we need to check if blend enabled to setup these fields?
* ctx->blend->base.rt[0].blend_enable
*
* do hw support RGBA independ blend?
/* do hw support RGBA independ blend?
* PIPE_CAP_INDEP_BLEND_ENABLE
*
* how to handle the no cbuf only zbuf case?
Expand All @@ -551,17 +562,23 @@ lima_pack_render_state(struct lima_context *ctx)
(float_to_ubyte(ctx->blend_color.color[1]) << 16);
render->blend_color_ra = float_to_ubyte(ctx->blend_color.color[0]) |
(float_to_ubyte(ctx->blend_color.color[3]) << 16);
#if 0
render->alpha_blend = lima_blend_func(rt->rgb_func) |
(lima_blend_func(rt->alpha_func) << 3) |
(lima_blend_factor(rt->rgb_src_factor) << 6) |
(lima_blend_factor(rt->rgb_dst_factor) << 11) |
((lima_blend_factor(rt->alpha_src_factor) & 0xF) << 16) |
((lima_blend_factor(rt->alpha_dst_factor) & 0xF) << 20) |
0xFC000000; /* need check if this GLESv1 glAlphaFunc */
#else
render->alpha_blend = 0xfc3b1ad2;
#endif

if (rt->blend_enable) {
render->alpha_blend = lima_calculate_alpha_blend(rt->rgb_func, rt->alpha_func,
rt->rgb_src_factor, rt->rgb_dst_factor,
rt->alpha_src_factor, rt->alpha_dst_factor);
}
else {
/*
* Special handling for blending disabled.
* Binary driver is generating the same alpha_value,
* as when we would just enable blending, without changing/setting any blend equation/params.
* Normaly in this case mesa would set all rt fields (func/factor) to zero.
*/
render->alpha_blend = lima_calculate_alpha_blend(PIPE_BLEND_ADD, PIPE_BLEND_ADD,
PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ZERO,
PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ZERO);
}

#if 0
struct pipe_depth_state *depth = &ctx->zsa->base.depth;
Expand Down