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-rw-r--r--src/gallium/auxiliary/draw/draw_pipe_validate.c317
1 files changed, 317 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_validate.c b/src/gallium/auxiliary/draw/draw_pipe_validate.c
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+++ b/src/gallium/auxiliary/draw/draw_pipe_validate.c
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+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/* Authors: Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+#include "util/u_memory.h"
+#include "pipe/p_defines.h"
+#include "draw_private.h"
+#include "draw_pipe.h"
+#include "draw_context.h"
+
+static boolean points( unsigned prim )
+{
+ return (prim == PIPE_PRIM_POINTS);
+}
+
+static boolean lines( unsigned prim )
+{
+ return (prim == PIPE_PRIM_LINES ||
+ prim == PIPE_PRIM_LINE_STRIP ||
+ prim == PIPE_PRIM_LINE_LOOP);
+}
+
+static boolean triangles( unsigned prim )
+{
+ return prim >= PIPE_PRIM_TRIANGLES;
+}
+
+/**
+ * Check if we need any special pipeline stages, or whether
+ * prims/verts can go through untouched. Don't test for bypass
+ * clipping or vs modes, this function is just about the primitive
+ * pipeline stages.
+ */
+boolean
+draw_need_pipeline(const struct draw_context *draw,
+ const struct pipe_rasterizer_state *rasterizer,
+ unsigned int prim )
+{
+ /* Don't have to worry about triangles turning into lines/points
+ * and triggering the pipeline, because we have to trigger the
+ * pipeline *anyway* if unfilled mode is active.
+ */
+ if (lines(prim))
+ {
+ /* line stipple */
+ if (rasterizer->line_stipple_enable && draw->pipeline.line_stipple)
+ return TRUE;
+
+ /* wide lines */
+ if (rasterizer->line_width > draw->pipeline.wide_line_threshold)
+ return TRUE;
+
+ /* AA lines */
+ if (rasterizer->line_smooth && draw->pipeline.aaline)
+ return TRUE;
+ }
+
+ if (points(prim))
+ {
+ /* large points */
+ if (rasterizer->point_size > draw->pipeline.wide_point_threshold)
+ return TRUE;
+
+ /* AA points */
+ if (rasterizer->point_smooth && draw->pipeline.aapoint)
+ return TRUE;
+
+ /* point sprites */
+ if (rasterizer->point_sprite && draw->pipeline.point_sprite)
+ return TRUE;
+ }
+
+
+ if (triangles(prim))
+ {
+ /* polygon stipple */
+ if (rasterizer->poly_stipple_enable && draw->pipeline.pstipple)
+ return TRUE;
+
+ /* unfilled polygons */
+ if (rasterizer->fill_cw != PIPE_POLYGON_MODE_FILL ||
+ rasterizer->fill_ccw != PIPE_POLYGON_MODE_FILL)
+ return TRUE;
+
+ /* polygon offset */
+ if (rasterizer->offset_cw || rasterizer->offset_ccw)
+ return TRUE;
+
+ /* two-side lighting */
+ if (rasterizer->light_twoside)
+ return TRUE;
+ }
+
+ /* polygon cull - this is difficult - hardware can cull just fine
+ * most of the time (though sometimes CULL_NEITHER is unsupported.
+ *
+ * Generally this isn't a reason to require the pipeline, though.
+ *
+ if (rasterizer->cull_mode)
+ return TRUE;
+ */
+
+ return FALSE;
+}
+
+
+
+/**
+ * Rebuild the rendering pipeline.
+ */
+static struct draw_stage *validate_pipeline( struct draw_stage *stage )
+{
+ struct draw_context *draw = stage->draw;
+ struct draw_stage *next = draw->pipeline.rasterize;
+ int need_det = 0;
+ int precalc_flat = 0;
+ boolean wide_lines, wide_points;
+
+ /* Set the validate's next stage to the rasterize stage, so that it
+ * can be found later if needed for flushing.
+ */
+ stage->next = next;
+
+ /* drawing wide lines? */
+ wide_lines = (draw->rasterizer->line_width > draw->pipeline.wide_line_threshold
+ && !draw->rasterizer->line_smooth);
+
+ /* drawing large points? */
+ if (draw->rasterizer->point_sprite && draw->pipeline.point_sprite)
+ wide_points = TRUE;
+ else if (draw->rasterizer->point_smooth && draw->pipeline.aapoint)
+ wide_points = FALSE;
+ else if (draw->rasterizer->point_size > draw->pipeline.wide_point_threshold)
+ wide_points = TRUE;
+ else
+ wide_points = FALSE;
+
+ /*
+ * NOTE: we build up the pipeline in end-to-start order.
+ *
+ * TODO: make the current primitive part of the state and build
+ * shorter pipelines for lines & points.
+ */
+
+ if (draw->rasterizer->line_smooth && draw->pipeline.aaline) {
+ draw->pipeline.aaline->next = next;
+ next = draw->pipeline.aaline;
+ }
+
+ if (draw->rasterizer->point_smooth && draw->pipeline.aapoint) {
+ draw->pipeline.aapoint->next = next;
+ next = draw->pipeline.aapoint;
+ }
+
+ if (wide_lines) {
+ draw->pipeline.wide_line->next = next;
+ next = draw->pipeline.wide_line;
+ precalc_flat = 1;
+ }
+
+ if (wide_points || draw->rasterizer->point_sprite) {
+ draw->pipeline.wide_point->next = next;
+ next = draw->pipeline.wide_point;
+ }
+
+ if (draw->rasterizer->line_stipple_enable && draw->pipeline.line_stipple) {
+ draw->pipeline.stipple->next = next;
+ next = draw->pipeline.stipple;
+ precalc_flat = 1; /* only needed for lines really */
+ }
+
+ if (draw->rasterizer->poly_stipple_enable
+ && draw->pipeline.pstipple) {
+ draw->pipeline.pstipple->next = next;
+ next = draw->pipeline.pstipple;
+ }
+
+ if (draw->rasterizer->fill_cw != PIPE_POLYGON_MODE_FILL ||
+ draw->rasterizer->fill_ccw != PIPE_POLYGON_MODE_FILL) {
+ draw->pipeline.unfilled->next = next;
+ next = draw->pipeline.unfilled;
+ precalc_flat = 1; /* only needed for triangles really */
+ need_det = 1;
+ }
+
+ if (draw->rasterizer->flatshade && precalc_flat) {
+ draw->pipeline.flatshade->next = next;
+ next = draw->pipeline.flatshade;
+ }
+
+ if (draw->rasterizer->offset_cw ||
+ draw->rasterizer->offset_ccw) {
+ draw->pipeline.offset->next = next;
+ next = draw->pipeline.offset;
+ need_det = 1;
+ }
+
+ if (draw->rasterizer->light_twoside) {
+ draw->pipeline.twoside->next = next;
+ next = draw->pipeline.twoside;
+ need_det = 1;
+ }
+
+ /* Always run the cull stage as we calculate determinant there
+ * also.
+ *
+ * This can actually be a win as culling out the triangles can lead
+ * to less work emitting vertices, smaller vertex buffers, etc.
+ * It's difficult to say whether this will be true in general.
+ */
+ if (need_det || draw->rasterizer->cull_mode) {
+ draw->pipeline.cull->next = next;
+ next = draw->pipeline.cull;
+ }
+
+ /* Clip stage
+ */
+ if (!draw->bypass_clipping)
+ {
+ draw->pipeline.clip->next = next;
+ next = draw->pipeline.clip;
+ }
+
+
+ draw->pipeline.first = next;
+ return next;
+}
+
+static void validate_tri( struct draw_stage *stage,
+ struct prim_header *header )
+{
+ struct draw_stage *pipeline = validate_pipeline( stage );
+ pipeline->tri( pipeline, header );
+}
+
+static void validate_line( struct draw_stage *stage,
+ struct prim_header *header )
+{
+ struct draw_stage *pipeline = validate_pipeline( stage );
+ pipeline->line( pipeline, header );
+}
+
+static void validate_point( struct draw_stage *stage,
+ struct prim_header *header )
+{
+ struct draw_stage *pipeline = validate_pipeline( stage );
+ pipeline->point( pipeline, header );
+}
+
+static void validate_reset_stipple_counter( struct draw_stage *stage )
+{
+ struct draw_stage *pipeline = validate_pipeline( stage );
+ pipeline->reset_stipple_counter( pipeline );
+}
+
+static void validate_flush( struct draw_stage *stage,
+ unsigned flags )
+{
+ /* May need to pass a backend flush on to the rasterize stage.
+ */
+ if (stage->next)
+ stage->next->flush( stage->next, flags );
+}
+
+
+static void validate_destroy( struct draw_stage *stage )
+{
+ FREE( stage );
+}
+
+
+/**
+ * Create validate pipeline stage.
+ */
+struct draw_stage *draw_validate_stage( struct draw_context *draw )
+{
+ struct draw_stage *stage = CALLOC_STRUCT(draw_stage);
+ if (stage == NULL)
+ return NULL;
+
+ stage->draw = draw;
+ stage->next = NULL;
+ stage->point = validate_point;
+ stage->line = validate_line;
+ stage->tri = validate_tri;
+ stage->flush = validate_flush;
+ stage->reset_stipple_counter = validate_reset_stipple_counter;
+ stage->destroy = validate_destroy;
+
+ return stage;
+}
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