#include "sp_state.h"
#include "sp_quad.h"
#include "sp_quad_pipe.h"
-#include "sp_texture.h"
-#include "sp_tex_sample.h"
struct quad_shade_stage
{
struct quad_stage stage; /**< base class */
- struct tgsi_exec_machine *machine;
- struct tgsi_exec_vector *inputs, *outputs;
+
+ /* no other fields at this time */
};
/**
* Execute fragment shader for the four fragments in the quad.
+ * \return TRUE if quad is alive, FALSE if all four pixels are killed
*/
-static void
+static INLINE boolean
shade_quad(struct quad_stage *qs, struct quad_header *quad)
{
- struct quad_shade_stage *qss = quad_shade_stage( qs );
struct softpipe_context *softpipe = qs->softpipe;
- struct tgsi_exec_machine *machine = qss->machine;
- boolean z_written;
-
- /* Consts do not require 16 byte alignment. */
- machine->Consts = softpipe->mapped_constants[PIPE_SHADER_FRAGMENT];
-
- machine->InterpCoefs = quad->coef;
+ struct tgsi_exec_machine *machine = softpipe->fs_machine;
/* run shader */
- quad->inout.mask &= softpipe->fs->run( softpipe->fs, machine, quad );
-
- /* store outputs */
- z_written = FALSE;
- {
- const ubyte *sem_name = softpipe->fs->info.output_semantic_name;
- const ubyte *sem_index = softpipe->fs->info.output_semantic_index;
- const uint n = qss->stage.softpipe->fs->info.num_outputs;
- uint i;
- for (i = 0; i < n; i++) {
- switch (sem_name[i]) {
- case TGSI_SEMANTIC_COLOR:
- {
- uint cbuf = sem_index[i];
- memcpy(quad->output.color[cbuf],
- &machine->Outputs[i].xyzw[0].f[0],
- sizeof(quad->output.color[0]) );
- }
- break;
- case TGSI_SEMANTIC_POSITION:
- {
- uint j;
- for (j = 0; j < 4; j++) {
- quad->output.depth[j] = machine->Outputs[0].xyzw[2].f[j];
- }
- z_written = TRUE;
- }
- break;
- }
+ machine->flatshade_color = softpipe->rasterizer->flatshade ? TRUE : FALSE;
+ return softpipe->fs_variant->run( softpipe->fs_variant, machine, quad );
+}
+
+
+
+static void
+coverage_quad(struct quad_stage *qs, struct quad_header *quad)
+{
+ struct softpipe_context *softpipe = qs->softpipe;
+ uint cbuf;
+
+ /* loop over colorbuffer outputs */
+ for (cbuf = 0; cbuf < softpipe->framebuffer.nr_cbufs; cbuf++) {
+ float (*quadColor)[4] = quad->output.color[cbuf];
+ unsigned j;
+ for (j = 0; j < TGSI_QUAD_SIZE; j++) {
+ assert(quad->input.coverage[j] >= 0.0);
+ assert(quad->input.coverage[j] <= 1.0);
+ quadColor[3][j] *= quad->input.coverage[j];
}
}
+}
- if (!z_written) {
- /* compute Z values now, as in the quad earlyz stage */
- /* XXX we should really only do this if the earlyz stage is not used */
- const float fx = (float) quad->input.x0;
- const float fy = (float) quad->input.y0;
- const float dzdx = quad->posCoef->dadx[2];
- const float dzdy = quad->posCoef->dady[2];
- const float z0 = quad->posCoef->a0[2] + dzdx * fx + dzdy * fy;
-
- quad->output.depth[0] = z0;
- quad->output.depth[1] = z0 + dzdx;
- quad->output.depth[2] = z0 + dzdy;
- quad->output.depth[3] = z0 + dzdx + dzdy;
- }
- /* shader may cull fragments */
- if (quad->inout.mask) {
- qs->next->run( qs->next, quad );
+/**
+ * Shade/write an array of quads
+ * Called via quad_stage::run()
+ */
+static void
+shade_quads(struct quad_stage *qs,
+ struct quad_header *quads[],
+ unsigned nr)
+{
+ struct softpipe_context *softpipe = qs->softpipe;
+ struct tgsi_exec_machine *machine = softpipe->fs_machine;
+ unsigned i, nr_quads = 0;
+
+ tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
+ softpipe->mapped_constants[PIPE_SHADER_FRAGMENT],
+ softpipe->const_buffer_size[PIPE_SHADER_FRAGMENT]);
+
+ machine->InterpCoefs = quads[0]->coef;
+
+ for (i = 0; i < nr; i++) {
+ /* Only omit this quad from the output list if all the fragments
+ * are killed _AND_ it's not the first quad in the list.
+ * The first quad is special in the (optimized) depth-testing code:
+ * the quads' Z coordinates are step-wise interpolated with respect
+ * to the first quad in the list.
+ * For multi-pass algorithms we need to produce exactly the same
+ * Z values in each pass. If interpolation starts with different quads
+ * we can get different Z values for the same (x,y).
+ */
+ if (!shade_quad(qs, quads[i]) && i > 0)
+ continue; /* quad totally culled/killed */
+
+ if (/*do_coverage*/ 0)
+ coverage_quad( qs, quads[i] );
+
+ quads[nr_quads++] = quads[i];
}
+
+ if (nr_quads)
+ qs->next->run(qs->next, quads, nr_quads);
}
-
+
/**
* Per-primitive (or per-begin?) setup
static void
shade_begin(struct quad_stage *qs)
{
- struct quad_shade_stage *qss = quad_shade_stage(qs);
struct softpipe_context *softpipe = qs->softpipe;
- softpipe->fs->prepare( softpipe->fs,
- qss->machine,
- (struct tgsi_sampler **)
- softpipe->tgsi.frag_samplers_list );
+ softpipe->fs_variant->prepare( softpipe->fs_variant,
+ softpipe->fs_machine,
+ (struct tgsi_sampler **)
+ softpipe->tgsi.frag_samplers_list );
qs->next->begin(qs->next);
}
static void
shade_destroy(struct quad_stage *qs)
{
- struct quad_shade_stage *qss = (struct quad_shade_stage *) qs;
-
- tgsi_exec_machine_destroy(qss->machine);
-
FREE( qs );
}
qss->stage.softpipe = softpipe;
qss->stage.begin = shade_begin;
- qss->stage.run = shade_quad;
+ qss->stage.run = shade_quads;
qss->stage.destroy = shade_destroy;
- qss->machine = tgsi_exec_machine_create();
- if (!qss->machine)
- goto fail;
-
return &qss->stage;
fail:
- if (qss && qss->machine)
- tgsi_exec_machine_destroy(qss->machine);
-
FREE(qss);
return NULL;
}
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