/**
* Compute a0 for a constant-valued coefficient (GL_FLAT shading).
*/
-static void constant_coef( struct lp_rast_triangle *tri,
+static void constant_coef( struct lp_setup_context *setup,
+ struct lp_rast_triangle *tri,
unsigned slot,
const float value,
unsigned i )
* Compute a0, dadx and dady for a linearly interpolated coefficient,
* for a triangle.
*/
-static void linear_coef( struct lp_rast_triangle *tri,
+static void linear_coef( struct lp_setup_context *setup,
+ struct lp_rast_triangle *tri,
float oneoverarea,
unsigned slot,
const float (*v1)[4],
* instead - i'll switch to this later.
*/
tri->inputs.a0[slot][i] = (a1 -
- (dadx * (v1[0][0] - 0.5f) +
- dady * (v1[0][1] - 0.5f)));
+ (dadx * (v1[0][0] - setup->pixel_offset) +
+ dady * (v1[0][1] - setup->pixel_offset)));
}
* Later, when we compute the value at a particular fragment position we'll
* divide the interpolated value by the interpolated W at that fragment.
*/
-static void perspective_coef( struct lp_rast_triangle *tri,
+static void perspective_coef( struct lp_setup_context *setup,
+ struct lp_rast_triangle *tri,
float oneoverarea,
unsigned slot,
const float (*v1)[4],
tri->inputs.dadx[slot][i] = dadx;
tri->inputs.dady[slot][i] = dady;
tri->inputs.a0[slot][i] = (a1 -
- (dadx * (v1[0][0] - 0.5f) +
- dady * (v1[0][1] - 0.5f)));
+ (dadx * (v1[0][0] - setup->pixel_offset) +
+ dady * (v1[0][1] - setup->pixel_offset)));
}
* We could do a bit less work if we'd examine gl_FragCoord's swizzle mask.
*/
static void
-setup_fragcoord_coef(struct lp_rast_triangle *tri,
+setup_fragcoord_coef(struct lp_setup_context *setup,
+ struct lp_rast_triangle *tri,
float oneoverarea,
unsigned slot,
const float (*v1)[4],
tri->inputs.dadx[slot][1] = 0.0;
tri->inputs.dady[slot][1] = 1.0;
/*Z*/
- linear_coef(tri, oneoverarea, slot, v1, v2, v3, 0, 2);
+ linear_coef(setup, tri, oneoverarea, slot, v1, v2, v3, 0, 2);
/*W*/
- linear_coef(tri, oneoverarea, slot, v1, v2, v3, 0, 3);
+ linear_coef(setup, tri, oneoverarea, slot, v1, v2, v3, 0, 3);
}
-static void setup_facing_coef( struct lp_rast_triangle *tri,
+static void setup_facing_coef( struct lp_setup_context *setup,
+ struct lp_rast_triangle *tri,
unsigned slot,
boolean frontface )
{
- constant_coef( tri, slot, 1.0f - frontface, 0 );
- constant_coef( tri, slot, 0.0f, 1 ); /* wasted */
- constant_coef( tri, slot, 0.0f, 2 ); /* wasted */
- constant_coef( tri, slot, 0.0f, 3 ); /* wasted */
+ constant_coef( setup, tri, slot, 1.0f - frontface, 0 );
+ constant_coef( setup, tri, slot, 0.0f, 1 ); /* wasted */
+ constant_coef( setup, tri, slot, 0.0f, 2 ); /* wasted */
+ constant_coef( setup, tri, slot, 0.0f, 3 ); /* wasted */
}
/**
* Compute the tri->coef[] array dadx, dady, a0 values.
*/
-static void setup_tri_coefficients( struct setup_context *setup,
+static void setup_tri_coefficients( struct lp_setup_context *setup,
struct lp_rast_triangle *tri,
float oneoverarea,
const float (*v1)[4],
/* The internal position input is in slot zero:
*/
- setup_fragcoord_coef(tri, oneoverarea, 0, v1, v2, v3);
+ setup_fragcoord_coef(setup, tri, oneoverarea, 0, v1, v2, v3);
/* setup interpolation for all the remaining attributes:
*/
switch (setup->fs.input[slot].interp) {
case LP_INTERP_CONSTANT:
for (i = 0; i < NUM_CHANNELS; i++)
- constant_coef(tri, slot+1, v3[vert_attr][i], i);
+ constant_coef(setup, tri, slot+1, v3[vert_attr][i], i);
break;
case LP_INTERP_LINEAR:
for (i = 0; i < NUM_CHANNELS; i++)
- linear_coef(tri, oneoverarea, slot+1, v1, v2, v3, vert_attr, i);
+ linear_coef(setup, tri, oneoverarea, slot+1, v1, v2, v3, vert_attr, i);
break;
case LP_INTERP_PERSPECTIVE:
for (i = 0; i < NUM_CHANNELS; i++)
- perspective_coef(tri, oneoverarea, slot+1, v1, v2, v3, vert_attr, i);
+ perspective_coef(setup, tri, oneoverarea, slot+1, v1, v2, v3, vert_attr, i);
break;
case LP_INTERP_POSITION:
/* XXX: fix me - duplicates the values in slot zero.
*/
- setup_fragcoord_coef(tri, oneoverarea, slot+1, v1, v2, v3);
+ setup_fragcoord_coef(setup, tri, oneoverarea, slot+1, v1, v2, v3);
break;
case LP_INTERP_FACING:
- setup_facing_coef(tri, slot+1, frontface);
+ setup_facing_coef(setup, tri, slot+1, frontface);
break;
default:
* bins for the tiles which we overlap.
*/
static void
-do_triangle_ccw(struct setup_context *setup,
+do_triangle_ccw(struct lp_setup_context *setup,
const float (*v1)[4],
const float (*v2)[4],
const float (*v3)[4],
boolean frontfacing )
{
/* x/y positions in fixed point */
- const int x1 = subpixel_snap(v1[0][0]);
- const int x2 = subpixel_snap(v2[0][0]);
- const int x3 = subpixel_snap(v3[0][0]);
- const int y1 = subpixel_snap(v1[0][1]);
- const int y2 = subpixel_snap(v2[0][1]);
- const int y3 = subpixel_snap(v3[0][1]);
+ const int x1 = subpixel_snap(v1[0][0] + 0.5 - setup->pixel_offset);
+ const int x2 = subpixel_snap(v2[0][0] + 0.5 - setup->pixel_offset);
+ const int x3 = subpixel_snap(v3[0][0] + 0.5 - setup->pixel_offset);
+ const int y1 = subpixel_snap(v1[0][1] + 0.5 - setup->pixel_offset);
+ const int y2 = subpixel_snap(v2[0][1] + 0.5 - setup->pixel_offset);
+ const int y3 = subpixel_snap(v3[0][1] + 0.5 - setup->pixel_offset);
struct lp_scene *scene = lp_setup_get_current_scene(setup);
struct lp_rast_triangle *tri;
tri = alloc_triangle(scene, setup->fs.nr_inputs, &tri_bytes);
+#ifdef DEBUG
+ tri->v[0][0] = v1[0][0];
+ tri->v[1][0] = v2[0][0];
+ tri->v[2][0] = v3[0][0];
+ tri->v[0][1] = v1[0][1];
+ tri->v[1][1] = v2[0][1];
+ tri->v[2][1] = v3[0][1];
+#endif
+
tri->dx12 = x1 - x2;
tri->dx23 = x2 - x3;
tri->dx31 = x3 - x1;
*/
setup_tri_coefficients( setup, tri, oneoverarea, v1, v2, v3, frontfacing );
+ tri->inputs.facing = frontfacing ? 1.0F : -1.0F;
+
/* half-edge constants, will be interated over the whole render target.
*/
tri->c1 = tri->dy12 * x1 - tri->dx12 * y1;
maxx = maxx / TILE_SIZE;
maxy = maxy / TILE_SIZE;
- /* Clamp maxx, maxy to framebuffer size
+ /*
+ * Clamp to framebuffer size
*/
+ minx = MAX2(minx, 0);
+ miny = MAX2(miny, 0);
maxx = MIN2(maxx, scene->tiles_x - 1);
maxy = MIN2(maxy, scene->tiles_y - 1);
}
-static void triangle_cw( struct setup_context *setup,
+static void triangle_cw( struct lp_setup_context *setup,
const float (*v0)[4],
const float (*v1)[4],
const float (*v2)[4] )
}
-static void triangle_ccw( struct setup_context *setup,
+static void triangle_ccw( struct lp_setup_context *setup,
const float (*v0)[4],
const float (*v1)[4],
const float (*v2)[4] )
}
-static void triangle_both( struct setup_context *setup,
+static void triangle_both( struct lp_setup_context *setup,
const float (*v0)[4],
const float (*v1)[4],
const float (*v2)[4] )
}
-static void triangle_nop( struct setup_context *setup,
+static void triangle_nop( struct lp_setup_context *setup,
const float (*v0)[4],
const float (*v1)[4],
const float (*v2)[4] )
void
-lp_setup_choose_triangle( struct setup_context *setup )
+lp_setup_choose_triangle( struct lp_setup_context *setup )
{
switch (setup->cullmode) {
case PIPE_WINDING_NONE:
projects / mesa.git / blobdiff