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isl: Add func isl_get_intratile_image_offset_el()

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Chad Versace 2016-01-25 12:43:56 -08:00 • committed by Jason Ekstrand
parent 18a83eaa8c
commit 7ab0d2e2c0
2 changed files with 57 additions and 0 deletions
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37
src/isl/isl.c
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@ -1344,3 +1344,40 @@ isl_surf_get_image_offset_el(const struct isl_surf *surf,
*x_offset_el = x_offset_sa / fmtl->bw;
*y_offset_el = y_offset_sa / fmtl->bh;
}
void
isl_surf_get_image_intratile_offset_el(const struct isl_device *dev,
const struct isl_surf *surf,
uint32_t level,
uint32_t logical_array_layer,
uint32_t logical_z_offset,
uint32_t *base_address_offset,
uint32_t *x_offset_el,
uint32_t *y_offset_el)
{
const struct isl_format_layout *fmtl = isl_format_get_layout(surf->format);
struct isl_tile_info tile_info;
isl_surf_get_tile_info(dev, surf, &tile_info);
uint32_t total_x_offset_el;
uint32_t total_y_offset_el;
isl_surf_get_image_offset_el(surf, level,
logical_array_layer,
logical_z_offset,
&total_x_offset_el,
&total_y_offset_el);
uint32_t small_y_offset_el = total_y_offset_el % tile_info.height;
uint32_t big_y_offset_el = total_y_offset_el - small_y_offset_el;
uint32_t big_y_offset_B = big_y_offset_el * surf->row_pitch;
uint32_t total_x_offset_B = total_x_offset_el * fmtl->bs;
uint32_t small_x_offset_B = total_x_offset_B % tile_info.width;
uint32_t small_x_offset_el = small_x_offset_B / fmtl->bs;
uint32_t big_x_offset_B = total_x_offset_B - small_x_offset_B;
*base_address_offset = big_y_offset_B + big_x_offset_B;
*x_offset_el = small_x_offset_el;
*y_offset_el = small_y_offset_el;
}

20
src/isl/isl.h
View file

@ -990,6 +990,26 @@ isl_surf_get_image_offset_el(const struct isl_surf *surf,
uint32_t *x_offset_el,
uint32_t *y_offset_el);
/**
* @brief Calculate the intratile offsets to a subimage in the surface.
*
* In @a base_address_offset return the offset from the base of the surface to
* the base address of the first tile of the subimage. In @a x_offset_el and
* @a y_offset_el, return the offset, in units of surface elements, from the
* tile's base to the subimage's first surface element. The x and y offsets
* are intratile offsets; that is, they do not exceed the boundary of the
* surface's tiling format.
*/
void
isl_surf_get_image_intratile_offset_el(const struct isl_device *dev,
const struct isl_surf *surf,
uint32_t level,
uint32_t logical_array_layer,
uint32_t logical_z_offset,
uint32_t *base_address_offset,
uint32_t *x_offset_el,
uint32_t *y_offset_el);
#ifdef __cplusplus
}
#endif