diff options
| author | Rhys Perry <[email protected]> | 2018-06-14 19:56:28 -0600 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2018-06-14 20:09:45 -0600 |
| commit | 51a221e37869235ad5c81bbfec06a2564b3b2d3b (patch) | |
| tree | 1b81ac61ab2cf2411f42944eb246c2d53af2c358 /src/gallium/auxiliary/util | |
| parent | 67f40dadaa6666dacd90d1540eaadef20b9d48ba (diff) | |
gallium: add support for programmable sample locations
Signed-off-by: Rhys Perry <[email protected]>
Reviewed-by: Brian Paul <[email protected]> (v2)
Reviewed-by: Marek Olšák <[email protected]> (v2)
Diffstat (limited to 'src/gallium/auxiliary/util')
| -rw-r--r-- | src/gallium/auxiliary/util/u_framebuffer.c | 30 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_framebuffer.h | 5 |
2 files changed, 35 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_framebuffer.c b/src/gallium/auxiliary/util/u_framebuffer.c index c2948a5cfb3..5bafddc726f 100644 --- a/src/gallium/auxiliary/util/u_framebuffer.c +++ b/src/gallium/auxiliary/util/u_framebuffer.c @@ -240,3 +240,33 @@ util_framebuffer_get_num_samples(const struct pipe_framebuffer_state *fb) return 1; } + + +/** + * Flip the sample location state along the Y axis. + */ +void +util_sample_locations_flip_y(struct pipe_screen *screen, unsigned fb_height, + unsigned samples, uint8_t *locations) +{ + unsigned row, i, shift, grid_width, grid_height; + uint8_t new_locations[ + PIPE_MAX_SAMPLE_LOCATION_GRID_SIZE * + PIPE_MAX_SAMPLE_LOCATION_GRID_SIZE * 32]; + + screen->get_sample_pixel_grid(screen, samples, &grid_width, &grid_height); + + shift = fb_height % grid_height; + + for (row = 0; row < grid_height; row++) { + unsigned row_size = grid_width * samples; + for (i = 0; i < row_size; i++) { + unsigned dest_row = grid_height - row - 1; + /* this relies on unsigned integer wraparound behaviour */ + dest_row = (dest_row - shift) % grid_height; + new_locations[dest_row * row_size + i] = locations[row * row_size + i]; + } + } + + memcpy(locations, new_locations, grid_width * grid_height * samples); +} diff --git a/src/gallium/auxiliary/util/u_framebuffer.h b/src/gallium/auxiliary/util/u_framebuffer.h index c73942c9c14..877e6e393f7 100644 --- a/src/gallium/auxiliary/util/u_framebuffer.h +++ b/src/gallium/auxiliary/util/u_framebuffer.h @@ -64,6 +64,11 @@ extern unsigned util_framebuffer_get_num_samples(const struct pipe_framebuffer_state *fb); +extern void +util_sample_locations_flip_y(struct pipe_screen *screen, unsigned fb_height, + unsigned samples, uint8_t *locations); + + #ifdef __cplusplus } #endif |