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-rw-r--r--src/mesa/pipe/cell/spu/tri.c125
1 files changed, 90 insertions, 35 deletions
diff --git a/src/mesa/pipe/cell/spu/tri.c b/src/mesa/pipe/cell/spu/tri.c
index 60a62fdcd51..90452f14ba6 100644
--- a/src/mesa/pipe/cell/spu/tri.c
+++ b/src/mesa/pipe/cell/spu/tri.c
@@ -46,6 +46,11 @@
#include "main.h"
#include "tri.h"
+/*
+#include <vmx2spu.h>
+#include <spu_internals.h>
+*/
+
#if 1
@@ -64,6 +69,8 @@
#define MASK_BOTTOM_RIGHT (1 << QUAD_BOTTOM_RIGHT)
#define MASK_ALL 0xf
+#define PIPE_MAX_SHADER_INPUTS 8 /* XXX temp */
+
static int cliprect_minx, cliprect_maxx, cliprect_miny, cliprect_maxy;
static uint tile[TILE_SIZE][TILE_SIZE] ALIGN16_ATTRIB;
@@ -85,6 +92,13 @@ struct edge {
};
+struct interp_coef
+{
+ float a0[4];
+ float dadx[4];
+ float dady[4];
+};
+
/**
* Triangle setup info (derived from draw_stage).
* Also used for line drawing (taking some liberties).
@@ -113,7 +127,10 @@ struct setup_stage {
#if 0
struct tgsi_interp_coef coef[PIPE_MAX_SHADER_INPUTS];
+#else
+ struct interp_coef coef[PIPE_MAX_SHADER_INPUTS];
#endif
+
#if 0
struct quad_header quad;
#endif
@@ -189,6 +206,41 @@ clip_emit_quad(struct setup_stage *setup)
#endif
/**
+ * Evaluate attribute coefficients (plane equations) to compute
+ * attribute values for the four fragments in a quad.
+ * Eg: four colors will be compute.
+ */
+static INLINE void
+eval_coeff( struct setup_stage *setup, uint slot,
+ float x, float y, float result[4][4])
+{
+ uint i;
+ const float *dadx = setup->coef[slot].dadx;
+ const float *dady = setup->coef[slot].dady;
+
+ /* loop over XYZW comps */
+ for (i = 0; i < 4; i++) {
+ result[QUAD_TOP_LEFT][i] = setup->coef[slot].a0[i] + x * dadx[i] + y * dady[i];
+ result[QUAD_TOP_RIGHT][i] = result[0][i] + dadx[i];
+ result[QUAD_BOTTOM_LEFT][i] = result[0][i] + dady[i];
+ result[QUAD_BOTTOM_RIGHT][i] = result[0][i] + dadx[i] + dady[i];
+ }
+}
+
+
+static INLINE uint
+pack_color(const float color[4])
+{
+ uint r = (uint) (color[0] * 255.0);
+ uint g = (uint) (color[1] * 255.0);
+ uint b = (uint) (color[2] * 255.0);
+ uint a = (uint) (color[3] * 255.0);
+ uint icolor = (b << 24) | (g << 16) | (r << 8) | a;
+ return icolor;
+}
+
+
+/**
* Emit a quad (pass to next stage). No clipping is done.
*/
static INLINE void
@@ -204,14 +256,18 @@ emit_quad( struct setup_stage *setup, int x, int y, unsigned mask )
/* Cell: "write" quad fragments to the tile by setting prim color */
int ix = x - cliprect_minx;
int iy = y - cliprect_miny;
+ float colors[4][4];
+
+ eval_coeff(setup, 1, (float) x, (float) y, colors);
+
if (mask & MASK_TOP_LEFT)
- tile[iy][ix] = setup->color;
+ tile[iy][ix] = pack_color(colors[QUAD_TOP_LEFT]);
if (mask & MASK_TOP_RIGHT)
- tile[iy][ix+1] = setup->color;
+ tile[iy][ix+1] = pack_color(colors[QUAD_TOP_RIGHT]);
if (mask & MASK_BOTTOM_LEFT)
- tile[iy+1][ix] = setup->color;
+ tile[iy+1][ix] = pack_color(colors[QUAD_BOTTOM_LEFT]);
if (mask & MASK_BOTTOM_RIGHT)
- tile[iy+1][ix+1] = setup->color;
+ tile[iy+1][ix+1] = pack_color(colors[QUAD_BOTTOM_RIGHT]);
#endif
}
@@ -445,41 +501,41 @@ static void const_coeff( struct setup_stage *setup,
#endif
-#if 0
/**
* Compute a0, dadx and dady for a linearly interpolated coefficient,
* for a triangle.
*/
static void tri_linear_coeff( struct setup_stage *setup,
- unsigned slot,
- unsigned i)
+ unsigned slot )
{
- float botda = setup->vmid->data[slot][i] - setup->vmin->data[slot][i];
- float majda = setup->vmax->data[slot][i] - setup->vmin->data[slot][i];
- float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
- float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
+ uint i;
+ for (i = 0; i < 4; i++) {
+ float botda = setup->vmid->data[slot][i] - setup->vmin->data[slot][i];
+ float majda = setup->vmax->data[slot][i] - setup->vmin->data[slot][i];
+ float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
+ float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
- assert(slot < PIPE_MAX_SHADER_INPUTS);
- assert(i <= 3);
+ assert(slot < PIPE_MAX_SHADER_INPUTS);
- setup->coef[slot].dadx[i] = a * setup->oneoverarea;
- setup->coef[slot].dady[i] = b * setup->oneoverarea;
+ setup->coef[slot].dadx[i] = a * setup->oneoverarea;
+ setup->coef[slot].dady[i] = b * setup->oneoverarea;
- /* calculate a0 as the value which would be sampled for the
- * fragment at (0,0), taking into account that we want to sample at
- * pixel centers, in other words (0.5, 0.5).
- *
- * this is neat but unfortunately not a good way to do things for
- * triangles with very large values of dadx or dady as it will
- * result in the subtraction and re-addition from a0 of a very
- * large number, which means we'll end up loosing a lot of the
- * fractional bits and precision from a0. the way to fix this is
- * to define a0 as the sample at a pixel center somewhere near vmin
- * instead - i'll switch to this later.
- */
- setup->coef[slot].a0[i] = (setup->vmin->data[slot][i] -
- (setup->coef[slot].dadx[i] * (setup->vmin->data[0][0] - 0.5f) +
- setup->coef[slot].dady[i] * (setup->vmin->data[0][1] - 0.5f)));
+ /* calculate a0 as the value which would be sampled for the
+ * fragment at (0,0), taking into account that we want to sample at
+ * pixel centers, in other words (0.5, 0.5).
+ *
+ * this is neat but unfortunately not a good way to do things for
+ * triangles with very large values of dadx or dady as it will
+ * result in the subtraction and re-addition from a0 of a very
+ * large number, which means we'll end up loosing a lot of the
+ * fractional bits and precision from a0. the way to fix this is
+ * to define a0 as the sample at a pixel center somewhere near vmin
+ * instead - i'll switch to this later.
+ */
+ setup->coef[slot].a0[i] = (setup->vmin->data[slot][i] -
+ (setup->coef[slot].dadx[i] * (setup->vmin->data[0][0] - 0.5f) +
+ setup->coef[slot].dady[i] * (setup->vmin->data[0][1] - 0.5f)));
+ }
/*
_mesa_printf("attr[%d].%c: %f dx:%f dy:%f\n",
@@ -489,7 +545,6 @@ static void tri_linear_coeff( struct setup_stage *setup,
setup->coef[slot].dady[i]);
*/
}
-#endif
#if 0
@@ -536,13 +591,13 @@ static void tri_persp_coeff( struct setup_stage *setup,
#endif
-#if 0
/**
* Compute the setup->coef[] array dadx, dady, a0 values.
* Must be called after setup->vmin,vmid,vmax,vprovoke are initialized.
*/
static void setup_tri_coefficients( struct setup_stage *setup )
{
+#if 0
const enum interp_mode *interp = setup->softpipe->vertex_info.interp_mode;
unsigned slot, j;
@@ -575,8 +630,10 @@ static void setup_tri_coefficients( struct setup_stage *setup )
assert(0);
}
}
-}
+#else
+ tri_linear_coeff(setup, 1); /* slot 1 = color */
#endif
+}
static void setup_tri_edges( struct setup_stage *setup )
@@ -710,9 +767,7 @@ static void setup_tri(
*/
setup_sort_vertices( setup, prim );
-#if 0
setup_tri_coefficients( setup );
-#endif
setup_tri_edges( setup );
#if 0
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 02:57:37 +0000