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cell: do texture sampling/filtering for four pixels at a time.

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This commit is contained in:
Brian Paul 2008-10-13 10:55:08 -06:00
parent 734685549c
commit 3b07c28dee
5 changed files with 161 additions and 10 deletions
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11
src/gallium/drivers/cell/spu/spu_command.c
View file

@ -301,10 +301,14 @@ cmd_state_sampler(const struct cell_command_sampler *sampler)
DEBUG_PRINTF("SAMPLER [%u]\n", sampler->unit);
spu.sampler[sampler->unit] = sampler->state;
if (spu.sampler[sampler->unit].min_img_filter == PIPE_TEX_FILTER_LINEAR)
if (spu.sampler[sampler->unit].min_img_filter == PIPE_TEX_FILTER_LINEAR) {
spu.sample_texture[sampler->unit] = sample_texture_bilinear;
else
spu.sample_texture4[sampler->unit] = sample_texture4_bilinear;
}
else {
spu.sample_texture[sampler->unit] = sample_texture_nearest;
spu.sample_texture4[sampler->unit] = sample_texture4_nearest;
}
}
@ -323,6 +327,9 @@ cmd_state_texture(const struct cell_command_texture *texture)
spu.texture[unit].width = width;
spu.texture[unit].height = height;
spu.texture[unit].width4 = spu_splats((float) width);
spu.texture[unit].height4 = spu_splats((float) height);
spu.texture[unit].tiles_per_row = width / TILE_SIZE;
spu.texture[unit].tex_size = (vector float) { width, height, 0.0, 0.0};

4
src/gallium/drivers/cell/spu/spu_funcs.c
View file

@ -106,6 +106,7 @@ spu_txp(vector float s, vector float t, vector float r, vector float q,
{
//const uint unit = 0;
struct vec_4x4 colors;
#if 0
vector float coords[4];
coords[0] = s;
@ -121,6 +122,9 @@ spu_txp(vector float s, vector float t, vector float r, vector float q,
colors.v[3] = spu.sample_texture[unit](unit, coords[3]);
_transpose_matrix4x4(colors.v, colors.v);
#else
spu.sample_texture4[unit](s, t, r, q, unit, colors.v);
#endif
return colors;
}

19
src/gallium/drivers/cell/spu/spu_main.h
View file

@ -67,6 +67,14 @@ typedef union {
typedef vector float (*spu_sample_texture_func)(uint unit,
vector float texcoord);
typedef void (*spu_sample_texture4_func)(vector float s,
vector float t,
vector float r,
vector float q,
uint unit,
vector float colors[4]);
/** Function for performing per-fragment ops */
typedef void (*spu_fragment_ops_func)(uint x, uint y,
tile_t *colorTile,
@ -107,10 +115,12 @@ struct spu_texture
void *start;
ushort width, height;
ushort tiles_per_row;
vector float tex_size;
vector unsigned int tex_size_mask; /**< == int(size - 1) */
vector unsigned int tex_size_x_mask; /**< == int(size - 1) */
vector unsigned int tex_size_y_mask; /**< == int(size - 1) */
vector float tex_size; /**< == {width, height, 0, 0} */
vector float width4; /**< == {width, width, width, width} */
vector float height4; /**< == {height, height, height, height} */
vector unsigned int tex_size_mask; /**< == {width-1, height-1, 0, 0 } */
vector unsigned int tex_size_x_mask; /**< splat(width-1) */
vector unsigned int tex_size_y_mask; /**< splat(height-1) */
} ALIGN16_ATTRIB;
@ -159,6 +169,7 @@ struct spu_global
/** Current texture sampler function */
spu_sample_texture_func sample_texture[CELL_MAX_SAMPLERS];
spu_sample_texture4_func sample_texture4[CELL_MAX_SAMPLERS];
/** Fragment program constants */
vector float constants[4 * CELL_MAX_CONSTANTS];

125
src/gallium/drivers/cell/spu/spu_texture.c
View file

@ -26,6 +26,8 @@
**************************************************************************/
#include <transpose_matrix4x4.h>
#include "pipe/p_compiler.h"
#include "spu_main.h"
#include "spu_texture.h"
@ -91,10 +93,10 @@ static void
get_four_texels(uint unit, vec_uint4 x, vec_uint4 y, vec_uint4 *texels)
{
const unsigned texture_ea = (uintptr_t) spu.texture[unit].start;
vec_uint4 tile_x = spu_rlmask(x, -5);
vec_uint4 tile_y = spu_rlmask(y, -5);
const qword offset_x = si_andi((qword) x, 0x1f);
const qword offset_y = si_andi((qword) y, 0x1f);
vec_uint4 tile_x = spu_rlmask(x, -5); /* tile_x = x / 32 */
vec_uint4 tile_y = spu_rlmask(y, -5); /* tile_y = y / 32 */
const qword offset_x = si_andi((qword) x, 0x1f); /* offset_x = x & 0x1f */
const qword offset_y = si_andi((qword) y, 0x1f); /* offset_y = y & 0x1f */
const qword tiles_per_row = (qword) spu_splats(spu.texture[unit].tiles_per_row);
const qword tile_size = (qword) spu_splats((unsigned) sizeof(tile_t));
@ -132,6 +134,31 @@ sample_texture_nearest(uint unit, vector float texcoord)
}
/**
* \param colors returned colors in SOA format (rrrr, gggg, bbbb, aaaa).
*/
void
sample_texture4_nearest(vector float s, vector float t,
vector float r, vector float q,
uint unit, vector float colors[4])
{
vector float ss = spu_mul(s, spu.texture[unit].width4);
vector float tt = spu_mul(t, spu.texture[unit].height4);
vector unsigned int is = spu_convtu(ss, 0);
vector unsigned int it = spu_convtu(tt, 0);
vec_uint4 texels[4];
/* GL_REPEAT wrap mode: */
is = spu_and(is, spu.texture[unit].tex_size_x_mask);
it = spu_and(it, spu.texture[unit].tex_size_y_mask);
get_four_texels(unit, is, it, texels);
/* convert four packed ARGBA pixels to float RRRR,GGGG,BBBB,AAAA */
spu_unpack_A8R8G8B8_transpose4(texels, colors);
}
vector float
sample_texture_bilinear(uint unit, vector float texcoord)
{
@ -198,3 +225,93 @@ sample_texture_bilinear(uint unit, vector float texcoord)
return texel_sum;
}
void
sample_texture4_bilinear(vector float s, vector float t,
vector float r, vector float q,
uint unit, vector float colors[4])
{
vector float ss = spu_madd(s, spu.texture[unit].width4, spu_splats(-0.5f));
vector float tt = spu_madd(t, spu.texture[unit].height4, spu_splats(-0.5f));
vector unsigned int is0 = spu_convtu(ss, 0);
vector unsigned int it0 = spu_convtu(tt, 0);
/* is + 1, it + 1 */
vector unsigned int is1 = spu_add(is0, 1);
vector unsigned int it1 = spu_add(it0, 1);
/* PIPE_TEX_WRAP_REPEAT */
is0 = spu_and(is0, spu.texture[unit].tex_size_x_mask);
it0 = spu_and(it0, spu.texture[unit].tex_size_y_mask);
is1 = spu_and(is1, spu.texture[unit].tex_size_x_mask);
it1 = spu_and(it1, spu.texture[unit].tex_size_y_mask);
/* get packed int texels */
vector unsigned int texels[16];
get_four_texels(unit, is0, it0, texels + 0); /* upper-left */
get_four_texels(unit, is1, it0, texels + 4); /* upper-right */
get_four_texels(unit, is0, it1, texels + 8); /* lower-left */
get_four_texels(unit, is1, it1, texels + 12); /* lower-right */
/* XXX possibly rework following code to compute the weighted sample
* colors with integer arithmetic for fewer int->float conversions.
*/
/* convert packed int texels to float colors */
vector float ftexels[16];
spu_unpack_A8R8G8B8_transpose4(texels + 0, ftexels + 0);
spu_unpack_A8R8G8B8_transpose4(texels + 4, ftexels + 4);
spu_unpack_A8R8G8B8_transpose4(texels + 8, ftexels + 8);
spu_unpack_A8R8G8B8_transpose4(texels + 12, ftexels + 12);
/* Compute weighting factors in [0,1]
* Multiply texcoord by 1024, AND with 1023, convert back to float.
*/
vector float ss1024 = spu_mul(ss, spu_splats(1024.0f));
vector signed int iss1024 = spu_convts(ss1024, 0);
iss1024 = spu_and(iss1024, 1023);
vector float sWeights0 = spu_convtf(iss1024, 10);
vector float tt1024 = spu_mul(tt, spu_splats(1024.0f));
vector signed int itt1024 = spu_convts(tt1024, 0);
itt1024 = spu_and(itt1024, 1023);
vector float tWeights0 = spu_convtf(itt1024, 10);
/* 1 - sWeight and 1 - tWeight */
vector float sWeights1 = spu_sub(spu_splats(1.0f), sWeights0);
vector float tWeights1 = spu_sub(spu_splats(1.0f), tWeights0);
/* reds, for four pixels */
ftexels[ 0] = spu_mul(ftexels[ 0], spu_mul(sWeights1, tWeights1)); /*ul*/
ftexels[ 4] = spu_mul(ftexels[ 4], spu_mul(sWeights0, tWeights1)); /*ur*/
ftexels[ 8] = spu_mul(ftexels[ 8], spu_mul(sWeights1, tWeights0)); /*ll*/
ftexels[12] = spu_mul(ftexels[12], spu_mul(sWeights0, tWeights0)); /*lr*/
colors[0] = spu_add(spu_add(ftexels[0], ftexels[4]),
spu_add(ftexels[8], ftexels[12]));
/* greens, for four pixels */
ftexels[ 1] = spu_mul(ftexels[ 1], spu_mul(sWeights1, tWeights1)); /*ul*/
ftexels[ 5] = spu_mul(ftexels[ 5], spu_mul(sWeights0, tWeights1)); /*ur*/
ftexels[ 9] = spu_mul(ftexels[ 9], spu_mul(sWeights1, tWeights0)); /*ll*/
ftexels[13] = spu_mul(ftexels[13], spu_mul(sWeights0, tWeights0)); /*lr*/
colors[1] = spu_add(spu_add(ftexels[1], ftexels[5]),
spu_add(ftexels[9], ftexels[13]));
/* blues, for four pixels */
ftexels[ 2] = spu_mul(ftexels[ 2], spu_mul(sWeights1, tWeights1)); /*ul*/
ftexels[ 6] = spu_mul(ftexels[ 6], spu_mul(sWeights0, tWeights1)); /*ur*/
ftexels[10] = spu_mul(ftexels[10], spu_mul(sWeights1, tWeights0)); /*ll*/
ftexels[14] = spu_mul(ftexels[14], spu_mul(sWeights0, tWeights0)); /*lr*/
colors[2] = spu_add(spu_add(ftexels[2], ftexels[6]),
spu_add(ftexels[10], ftexels[14]));
/* alphas, for four pixels */
ftexels[ 3] = spu_mul(ftexels[ 3], spu_mul(sWeights1, tWeights1)); /*ul*/
ftexels[ 7] = spu_mul(ftexels[ 7], spu_mul(sWeights0, tWeights1)); /*ur*/
ftexels[11] = spu_mul(ftexels[11], spu_mul(sWeights1, tWeights0)); /*ll*/
ftexels[15] = spu_mul(ftexels[15], spu_mul(sWeights0, tWeights0)); /*lr*/
colors[3] = spu_add(spu_add(ftexels[3], ftexels[7]),
spu_add(ftexels[11], ftexels[15]));
}

12
src/gallium/drivers/cell/spu/spu_texture.h
View file

@ -40,8 +40,20 @@ extern vector float
sample_texture_nearest(uint unit, vector float texcoord);
extern void
sample_texture4_nearest(vector float s, vector float t,
vector float r, vector float q,
uint unit, vector float colors[4]);
extern vector float
sample_texture_bilinear(uint unit, vector float texcoord);
extern void
sample_texture4_bilinear(vector float s, vector float t,
vector float r, vector float q,
uint unit, vector float colors[4]);
#endif /* SPU_TEXTURE_H */