*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
+ * Copyright 2008 VMware, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* all the enabled attributes run contiguously.
*/
-#include "pipe/p_util.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
#include "pipe/p_defines.h"
#include "pipe/p_shader_tokens.h"
#include "sp_context.h"
#include "sp_state.h"
-#include "sp_headers.h"
#include "sp_quad.h"
-#include "sp_texture.h"
-#include "sp_tex_sample.h"
+#include "sp_quad_pipe.h"
struct quad_shade_stage
{
- struct quad_stage stage;
- struct tgsi_sampler samplers[PIPE_MAX_SAMPLERS];
- struct tgsi_exec_machine machine;
- struct tgsi_exec_vector *inputs, *outputs;
- int colorOutSlot, depthOutSlot;
+ struct quad_stage stage; /**< base class */
+
+ /* 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
-shade_quad(
- struct quad_stage *qs,
- struct quad_header *quad )
+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;
+ struct tgsi_exec_machine *machine = softpipe->fs_machine;
- /* Consts do not require 16 byte alignment. */
- machine->Consts = softpipe->mapped_constants[PIPE_SHADER_FRAGMENT];
+ /* run shader */
+ machine->flatshade_color = softpipe->rasterizer->flatshade ? TRUE : FALSE;
+ return softpipe->fs_variant->run( softpipe->fs_variant, machine, quad );
+}
- machine->InterpCoefs = quad->coef;
- /* run shader */
- quad->mask &= softpipe->fs->run( softpipe->fs,
- &qss->machine,
- quad );
-
- /* store result color */
- if (qss->colorOutSlot >= 0) {
- /* XXX need to handle multiple color outputs someday */
- assert(qss->stage.softpipe->fs->info.output_semantic_name[qss->colorOutSlot]
- == TGSI_SEMANTIC_COLOR);
- memcpy(
- quad->outputs.color,
- &machine->Outputs[qss->colorOutSlot].xyzw[0].f[0],
- sizeof( quad->outputs.color ) );
- }
- /*
- * XXX the following code for updating quad->outputs.depth
- * isn't really needed if we did early z testing.
- */
-
- /* store result Z */
- if (qss->depthOutSlot >= 0) {
- /* output[slot] is new Z */
- uint i;
- for (i = 0; i < 4; i++) {
- quad->outputs.depth[i] = machine->Outputs[0].xyzw[2].f[i];
- }
- }
- else {
- /* copy input Z (which was interpolated by the executor) to output Z */
- uint i;
- for (i = 0; i < 4; i++) {
- quad->outputs.depth[i] = machine->Inputs[0].xyzw[2].f[i];
- /* XXX not sure the above line is always correct. The following
- * might be better:
- quad->outputs.depth[i] = machine->QuadPos.xyzw[2].f[i];
- */
+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];
}
}
+}
- /* shader may cull fragments */
- if( quad->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)
+static void
+shade_begin(struct quad_stage *qs)
{
- struct quad_shade_stage *qss = quad_shade_stage(qs);
struct softpipe_context *softpipe = qs->softpipe;
- unsigned i;
- unsigned num = MAX2(softpipe->num_textures, softpipe->num_samplers);
- /* set TGSI sampler state that varies */
- for (i = 0; i < num; i++) {
- qss->samplers[i].state = softpipe->sampler[i];
- qss->samplers[i].texture = softpipe->texture[i];
- }
-
- /* find output slots for depth, color */
- qss->colorOutSlot = -1;
- qss->depthOutSlot = -1;
- for (i = 0; i < qss->stage.softpipe->fs->info.num_outputs; i++) {
- switch (qss->stage.softpipe->fs->info.output_semantic_name[i]) {
- case TGSI_SEMANTIC_POSITION:
- qss->depthOutSlot = i;
- break;
- case TGSI_SEMANTIC_COLOR:
- qss->colorOutSlot = i;
- break;
- }
- }
-
- softpipe->fs->prepare( softpipe->fs,
- &qss->machine,
- qss->samplers );
+ 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)
+static void
+shade_destroy(struct quad_stage *qs)
{
- struct quad_shade_stage *qss = (struct quad_shade_stage *) qs;
-
- tgsi_exec_machine_free_data(&qss->machine);
- FREE( qss->inputs );
- FREE( qss->outputs );
FREE( qs );
}
-struct quad_stage *sp_quad_shade_stage( struct softpipe_context *softpipe )
+struct quad_stage *
+sp_quad_shade_stage( struct softpipe_context *softpipe )
{
struct quad_shade_stage *qss = CALLOC_STRUCT(quad_shade_stage);
- uint i;
-
- /* allocate storage for program inputs/outputs, aligned to 16 bytes */
- qss->inputs = MALLOC(PIPE_ATTRIB_MAX * sizeof(*qss->inputs) + 16);
- qss->outputs = MALLOC(PIPE_ATTRIB_MAX * sizeof(*qss->outputs) + 16);
- qss->machine.Inputs = align16(qss->inputs);
- qss->machine.Outputs = align16(qss->outputs);
+ if (!qss)
+ goto fail;
qss->stage.softpipe = softpipe;
qss->stage.begin = shade_begin;
- qss->stage.run = shade_quad;
+ qss->stage.run = shade_quads;
qss->stage.destroy = shade_destroy;
- /* set TGSI sampler state that's constant */
- for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
- assert(softpipe->tex_cache[i]);
- qss->samplers[i].get_samples = sp_get_samples;
- qss->samplers[i].pipe = &softpipe->pipe;
- qss->samplers[i].cache = softpipe->tex_cache[i];
- }
-
- tgsi_exec_machine_init( &qss->machine );
-
return &qss->stage;
+
+fail:
+ FREE(qss);
+ return NULL;
}
projects / mesa.git / blobdiff