static void
aaline_first_line(struct draw_stage *stage, struct prim_header *header)
{
auto struct aaline_stage *aaline = aaline_stage(stage);
struct draw_context *draw = stage->draw;
struct pipe_context *pipe = draw->pipe;
const struct pipe_rasterizer_state *rast = draw->rasterizer;
uint num_samplers;
void *r;
assert(draw->rasterizer->line_smooth);
if (draw->rasterizer->line_width <= 2.2)
aaline->half_line_width = 1.1f;
else
aaline->half_line_width = 0.5f * draw->rasterizer->line_width;
/*
* Bind (generate) our fragprog, sampler and texture
*/
if (!bind_aaline_fragment_shader(aaline)) {
stage->line = draw_pipe_passthrough_line;
stage->line(stage, header);
return;
}
draw_aaline_prepare_outputs(draw, draw->pipeline.aaline);
/* how many samplers? */
/* we'll use sampler/texture[pstip->sampler_unit] for the stipple */
num_samplers = MAX2(aaline->num_sampler_views, aaline->num_samplers);
num_samplers = MAX2(num_samplers, aaline->fs->sampler_unit + 1);
aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso;
pipe_sampler_view_reference(&aaline->state.sampler_views[aaline->fs->sampler_unit],
aaline->sampler_view);
draw->suspend_flushing = TRUE;
aaline->driver_bind_sampler_states(pipe, PIPE_SHADER_FRAGMENT, 0,
num_samplers, aaline->state.sampler);
aaline->driver_set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, 0,
num_samplers, aaline->state.sampler_views);
/* Disable triangle culling, stippling, unfilled mode etc. */
r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade);
pipe->bind_rasterizer_state(pipe, r);
draw->suspend_flushing = FALSE;
/* now really draw first line */
stage->line = aaline_line;
stage->line(stage, header);
}
/**
* Prepare outputs slots from the draw module
*
* Certain parts of the draw module can emit additional
* outputs that can be quite useful to the backends, a good
* example of it is the process of decomposing primitives
* into wireframes (aka. lines) which normally would lose
* the face-side information, but using this method we can
* inject another shader output which passes the original
* face side information to the backend.
*/
void
draw_prepare_shader_outputs(struct draw_context *draw)
{
draw_remove_extra_vertex_attribs(draw);
draw_prim_assembler_prepare_outputs(draw->ia);
draw_unfilled_prepare_outputs(draw, draw->pipeline.unfilled);
if (draw->pipeline.aapoint)
draw_aapoint_prepare_outputs(draw, draw->pipeline.aapoint);
if (draw->pipeline.aaline)
draw_aaline_prepare_outputs(draw, draw->pipeline.aaline);
}