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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.
*
**************************************************************************/
#include "imports.h"
#include "macros.h"
#include "pipe/draw/draw_private.h"
#include "i915_context.h"
#include "i915_winsys.h"
#include "i915_reg.h"
#include "i915_state.h"
#include "i915_batch.h"
/**
* Primitive emit to hardware. No support for vertex buffers or any
* nice fast paths.
*/
struct setup_stage {
struct draw_stage stage; /**< This must be first (base class) */
struct i915_context *i915;
};
/**
* Basically a cast wrapper.
*/
static INLINE struct setup_stage *setup_stage( struct draw_stage *stage )
{
return (struct setup_stage *)stage;
}
static inline unsigned pack_ub4( unsigned char b0,
unsigned char b1,
unsigned char b2,
unsigned char b3 )
{
return ((((unsigned int)b0) << 0) |
(((unsigned int)b1) << 8) |
(((unsigned int)b2) << 16) |
(((unsigned int)b3) << 24));
}
static inline unsigned fui( float f )
{
union {
float f;
unsigned ui;
} fi;
fi.f = f;
return fi.ui;
}
static inline unsigned char float_to_ubyte( float f )
{
unsigned char ub;
UNCLAMPED_FLOAT_TO_UBYTE(ub, f);
return ub;
}
/* Hardcoded vertex format: xyz/rgba
*/
static inline void
emit_hw_vertex( struct i915_context *i915,
struct vertex_header *vertex )
{
OUT_BATCH( fui(vertex->data[0][0]) );
OUT_BATCH( fui(vertex->data[0][1]) );
OUT_BATCH( fui(vertex->data[0][2]) );
OUT_BATCH( pack_ub4(float_to_ubyte( vertex->data[1][0] ),
float_to_ubyte( vertex->data[1][1] ),
float_to_ubyte( vertex->data[1][2] ),
float_to_ubyte( vertex->data[1][3] )) );
}
static inline void
emit_prim( struct draw_stage *stage,
struct prim_header *prim,
unsigned hwprim,
unsigned nr )
{
struct i915_context *i915 = setup_stage(stage)->i915;
struct i915_winsys *winsys = i915->winsys;
unsigned vertex_size = 4 * sizeof(int);
unsigned *ptr;
unsigned i;
if (i915->dirty)
i915_update_derived( i915 );
if (i915->hardware_dirty)
i915_emit_hardware_state( i915 );
ptr = winsys->batch_start( winsys, nr * vertex_size, 0 );
if (ptr == 0) {
winsys->batch_flush( winsys );
ptr = winsys->batch_start( winsys, nr * vertex_size, 0 );
if (ptr == 0) {
assert(0);
return;
}
}
/* Emit each triangle as a single primitive. I told you this was
* simple.
*/
OUT_BATCH(_3DPRIMITIVE |
hwprim |
((4 + vertex_size * nr)/4 - 2));
for (i = 0; i < nr; i++) {
emit_hw_vertex(i915, prim->v[i]);
ptr += vertex_size / sizeof(int);
}
}
static void
setup_tri( struct draw_stage *stage, struct prim_header *prim )
{
emit_prim( stage, prim, PRIM3D_TRILIST, 3 );
}
static void
setup_line(struct draw_stage *stage, struct prim_header *prim)
{
emit_prim( stage, prim, PRIM3D_LINELIST, 2 );
}
static void
setup_point(struct draw_stage *stage, struct prim_header *prim)
{
emit_prim( stage, prim, PRIM3D_POINTLIST, 1 );
}
static void setup_begin( struct draw_stage *stage )
{
}
static void setup_end( struct draw_stage *stage )
{
}
static void reset_stipple_counter( struct draw_stage *stage )
{
}
/**
* Create a new primitive setup/render stage.
*/
struct draw_stage *i915_draw_render_stage( struct i915_context *i915 )
{
struct setup_stage *setup = CALLOC_STRUCT(setup_stage);
setup->i915 = i915;
setup->stage.draw = i915->draw;
setup->stage.begin = setup_begin;
setup->stage.point = setup_point;
setup->stage.line = setup_line;
setup->stage.tri = setup_tri;
setup->stage.end = setup_end;
setup->stage.reset_stipple_counter = reset_stipple_counter;
return &setup->stage;
}
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