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| /************************************************************************** |
| * |
| * Copyright 2012 Christian König. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| #include "pipe/p_context.h" |
| |
| #include "tgsi/tgsi_ureg.h" |
| |
| #include "util/u_draw.h" |
| #include "util/u_memory.h" |
| #include "util/u_math.h" |
| |
| #include "vl_types.h" |
| #include "vl_vertex_buffers.h" |
| #include "vl_median_filter.h" |
| |
| enum VS_OUTPUT |
| { |
| VS_O_VPOS = 0, |
| VS_O_VTEX = 0 |
| }; |
| |
| static void * |
| create_vert_shader(struct vl_median_filter *filter) |
| { |
| struct ureg_program *shader; |
| struct ureg_src i_vpos; |
| struct ureg_dst o_vpos, o_vtex; |
| |
| shader = ureg_create(TGSI_PROCESSOR_VERTEX); |
| if (!shader) |
| return NULL; |
| |
| i_vpos = ureg_DECL_vs_input(shader, 0); |
| o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS); |
| o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX); |
| |
| ureg_MOV(shader, o_vpos, i_vpos); |
| ureg_MOV(shader, o_vtex, i_vpos); |
| |
| ureg_END(shader); |
| |
| return ureg_create_shader_and_destroy(shader, filter->pipe); |
| } |
| |
| static inline bool |
| is_vec_zero(struct vertex2f v) |
| { |
| return v.x == 0.0f && v.y == 0.0f; |
| } |
| |
| static void * |
| create_frag_shader(struct vl_median_filter *filter, |
| struct vertex2f *offsets, |
| unsigned num_offsets) |
| { |
| struct pipe_screen *screen = filter->pipe->screen; |
| struct ureg_program *shader; |
| struct ureg_src i_vtex; |
| struct ureg_src sampler; |
| struct ureg_dst *t_array = MALLOC(sizeof(struct ureg_dst) * num_offsets); |
| struct ureg_dst o_fragment; |
| const unsigned median = num_offsets >> 1; |
| int i, j; |
| |
| assert(num_offsets & 1); /* we need an odd number of offsets */ |
| if (!(num_offsets & 1)) { /* yeah, we REALLY need an odd number of offsets!!! */ |
| FREE(t_array); |
| return NULL; |
| } |
| |
| if (num_offsets > screen->get_shader_param( |
| screen, TGSI_PROCESSOR_FRAGMENT, PIPE_SHADER_CAP_MAX_TEMPS)) { |
| |
| FREE(t_array); |
| return NULL; |
| } |
| |
| shader = ureg_create(TGSI_PROCESSOR_FRAGMENT); |
| if (!shader) { |
| FREE(t_array); |
| return NULL; |
| } |
| |
| i_vtex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR); |
| sampler = ureg_DECL_sampler(shader, 0); |
| |
| for (i = 0; i < num_offsets; ++i) |
| t_array[i] = ureg_DECL_temporary(shader); |
| o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0); |
| |
| /* |
| * t_array[0..*] = vtex + offset[0..*] |
| * t_array[0..*] = tex(t_array[0..*], sampler) |
| * result = partial_bubblesort(t_array)[mid] |
| */ |
| |
| for (i = 0; i < num_offsets; ++i) { |
| if (!is_vec_zero(offsets[i])) { |
| ureg_ADD(shader, ureg_writemask(t_array[i], TGSI_WRITEMASK_XY), |
| i_vtex, ureg_imm2f(shader, offsets[i].x, offsets[i].y)); |
| ureg_MOV(shader, ureg_writemask(t_array[i], TGSI_WRITEMASK_ZW), |
| ureg_imm1f(shader, 0.0f)); |
| } |
| } |
| |
| for (i = 0; i < num_offsets; ++i) { |
| struct ureg_src src = is_vec_zero(offsets[i]) ? i_vtex : ureg_src(t_array[i]); |
| ureg_TEX(shader, t_array[i], TGSI_TEXTURE_2D, src, sampler); |
| } |
| |
| // TODO: Couldn't this be improved even more? |
| for (i = 0; i <= median; ++i) { |
| for (j = 1; j < (num_offsets - i - 1); ++j) { |
| struct ureg_dst tmp = ureg_DECL_temporary(shader); |
| ureg_MOV(shader, tmp, ureg_src(t_array[j])); |
| ureg_MAX(shader, t_array[j], ureg_src(t_array[j]), ureg_src(t_array[j - 1])); |
| ureg_MIN(shader, t_array[j - 1], ureg_src(tmp), ureg_src(t_array[j - 1])); |
| ureg_release_temporary(shader, tmp); |
| } |
| if (i == median) |
| ureg_MAX(shader, t_array[j], ureg_src(t_array[j]), ureg_src(t_array[j - 1])); |
| else |
| ureg_MIN(shader, t_array[j - 1], ureg_src(t_array[j]), ureg_src(t_array[j - 1])); |
| } |
| ureg_MOV(shader, o_fragment, ureg_src(t_array[median])); |
| |
| ureg_END(shader); |
| |
| FREE(t_array); |
| return ureg_create_shader_and_destroy(shader, filter->pipe); |
| } |
| |
| static void |
| generate_offsets(enum vl_median_filter_shape shape, unsigned size, |
| struct vertex2f **offsets, unsigned *num_offsets) |
| { |
| int i = 0, half_size; |
| struct vertex2f v; |
| |
| assert(offsets && num_offsets); |
| |
| /* size needs to be odd */ |
| size = align(size + 1, 2) - 1; |
| half_size = size >> 1; |
| |
| switch(shape) { |
| case VL_MEDIAN_FILTER_BOX: |
| *num_offsets = size*size; |
| break; |
| |
| case VL_MEDIAN_FILTER_CROSS: |
| case VL_MEDIAN_FILTER_X: |
| *num_offsets = size + size - 1; |
| break; |
| |
| case VL_MEDIAN_FILTER_HORIZONTAL: |
| case VL_MEDIAN_FILTER_VERTICAL: |
| *num_offsets = size; |
| break; |
| |
| default: |
| *num_offsets = 0; |
| return; |
| } |
| |
| *offsets = MALLOC(sizeof(struct vertex2f) * *num_offsets); |
| if (!*offsets) |
| return; |
| |
| switch(shape) { |
| case VL_MEDIAN_FILTER_BOX: |
| for (v.x = -half_size; v.x <= half_size; ++v.x) |
| for (v.y = -half_size; v.y <= half_size; ++v.y) |
| (*offsets)[i++] = v; |
| break; |
| |
| case VL_MEDIAN_FILTER_CROSS: |
| v.y = 0.0f; |
| for (v.x = -half_size; v.x <= half_size; ++v.x) |
| (*offsets)[i++] = v; |
| |
| v.x = 0.0f; |
| for (v.y = -half_size; v.y <= half_size; ++v.y) |
| if (v.y != 0.0f) |
| (*offsets)[i++] = v; |
| break; |
| |
| case VL_MEDIAN_FILTER_X: |
| for (v.x = v.y = -half_size; v.x <= half_size; ++v.x, ++v.y) |
| (*offsets)[i++] = v; |
| |
| for (v.x = -half_size, v.y = half_size; v.x <= half_size; ++v.x, --v.y) |
| if (v.y != 0.0f) |
| (*offsets)[i++] = v; |
| break; |
| |
| case VL_MEDIAN_FILTER_HORIZONTAL: |
| v.y = 0.0f; |
| for (v.x = -half_size; v.x <= half_size; ++v.x) |
| (*offsets)[i++] = v; |
| break; |
| |
| case VL_MEDIAN_FILTER_VERTICAL: |
| v.x = 0.0f; |
| for (v.y = -half_size; v.y <= half_size; ++v.y) |
| (*offsets)[i++] = v; |
| break; |
| } |
| |
| assert(i == *num_offsets); |
| } |
| |
| bool |
| vl_median_filter_init(struct vl_median_filter *filter, struct pipe_context *pipe, |
| unsigned width, unsigned height, unsigned size, |
| enum vl_median_filter_shape shape) |
| { |
| struct pipe_rasterizer_state rs_state; |
| struct pipe_blend_state blend; |
| struct pipe_sampler_state sampler; |
| struct vertex2f *offsets = NULL; |
| struct pipe_vertex_element ve; |
| unsigned i, num_offsets = 0; |
| |
| assert(filter && pipe); |
| assert(width && height); |
| assert(size > 1 && size < 20); |
| |
| memset(filter, 0, sizeof(*filter)); |
| filter->pipe = pipe; |
| |
| memset(&rs_state, 0, sizeof(rs_state)); |
| rs_state.half_pixel_center = true; |
| rs_state.bottom_edge_rule = true; |
| rs_state.depth_clip = 1; |
| filter->rs_state = pipe->create_rasterizer_state(pipe, &rs_state); |
| if (!filter->rs_state) |
| goto error_rs_state; |
| |
| memset(&blend, 0, sizeof blend); |
| blend.rt[0].rgb_func = PIPE_BLEND_ADD; |
| blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE; |
| blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE; |
| blend.rt[0].alpha_func = PIPE_BLEND_ADD; |
| blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE; |
| blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE; |
| blend.logicop_func = PIPE_LOGICOP_CLEAR; |
| blend.rt[0].colormask = PIPE_MASK_RGBA; |
| filter->blend = pipe->create_blend_state(pipe, &blend); |
| if (!filter->blend) |
| goto error_blend; |
| |
| memset(&sampler, 0, sizeof(sampler)); |
| sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
| sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
| sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
| sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; |
| sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; |
| sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; |
| sampler.compare_mode = PIPE_TEX_COMPARE_NONE; |
| sampler.compare_func = PIPE_FUNC_ALWAYS; |
| sampler.normalized_coords = 1; |
| filter->sampler = pipe->create_sampler_state(pipe, &sampler); |
| if (!filter->sampler) |
| goto error_sampler; |
| |
| filter->quad = vl_vb_upload_quads(pipe); |
| if(!filter->quad.buffer) |
| goto error_quad; |
| |
| memset(&ve, 0, sizeof(ve)); |
| ve.src_offset = 0; |
| ve.instance_divisor = 0; |
| ve.vertex_buffer_index = 0; |
| ve.src_format = PIPE_FORMAT_R32G32_FLOAT; |
| filter->ves = pipe->create_vertex_elements_state(pipe, 1, &ve); |
| if (!filter->ves) |
| goto error_ves; |
| |
| generate_offsets(shape, size, &offsets, &num_offsets); |
| if (!offsets) |
| goto error_offsets; |
| |
| for (i = 0; i < num_offsets; ++i) { |
| offsets[i].x /= width; |
| offsets[i].y /= height; |
| } |
| |
| filter->vs = create_vert_shader(filter); |
| if (!filter->vs) |
| goto error_vs; |
| |
| filter->fs = create_frag_shader(filter, offsets, num_offsets); |
| if (!filter->fs) |
| goto error_fs; |
| |
| FREE(offsets); |
| return true; |
| |
| error_fs: |
| pipe->delete_vs_state(pipe, filter->vs); |
| |
| error_vs: |
| FREE(offsets); |
| |
| error_offsets: |
| pipe->delete_vertex_elements_state(pipe, filter->ves); |
| |
| error_ves: |
| pipe_resource_reference(&filter->quad.buffer, NULL); |
| |
| error_quad: |
| pipe->delete_sampler_state(pipe, filter->sampler); |
| |
| error_sampler: |
| pipe->delete_blend_state(pipe, filter->blend); |
| |
| error_blend: |
| pipe->delete_rasterizer_state(pipe, filter->rs_state); |
| |
| error_rs_state: |
| return false; |
| } |
| |
| void |
| vl_median_filter_cleanup(struct vl_median_filter *filter) |
| { |
| assert(filter); |
| |
| filter->pipe->delete_sampler_state(filter->pipe, filter->sampler); |
| filter->pipe->delete_blend_state(filter->pipe, filter->blend); |
| filter->pipe->delete_rasterizer_state(filter->pipe, filter->rs_state); |
| filter->pipe->delete_vertex_elements_state(filter->pipe, filter->ves); |
| pipe_resource_reference(&filter->quad.buffer, NULL); |
| |
| filter->pipe->delete_vs_state(filter->pipe, filter->vs); |
| filter->pipe->delete_fs_state(filter->pipe, filter->fs); |
| } |
| |
| void |
| vl_median_filter_render(struct vl_median_filter *filter, |
| struct pipe_sampler_view *src, |
| struct pipe_surface *dst) |
| { |
| struct pipe_viewport_state viewport; |
| struct pipe_framebuffer_state fb_state; |
| |
| assert(filter && src && dst); |
| |
| memset(&viewport, 0, sizeof(viewport)); |
| viewport.scale[0] = dst->width; |
| viewport.scale[1] = dst->height; |
| viewport.scale[2] = 1; |
| viewport.scale[3] = 1; |
| |
| memset(&fb_state, 0, sizeof(fb_state)); |
| fb_state.width = dst->width; |
| fb_state.height = dst->height; |
| fb_state.nr_cbufs = 1; |
| fb_state.cbufs[0] = dst; |
| |
| filter->pipe->bind_rasterizer_state(filter->pipe, filter->rs_state); |
| filter->pipe->bind_blend_state(filter->pipe, filter->blend); |
| filter->pipe->bind_fragment_sampler_states(filter->pipe, 1, &filter->sampler); |
| filter->pipe->set_fragment_sampler_views(filter->pipe, 1, &src); |
| filter->pipe->bind_vs_state(filter->pipe, filter->vs); |
| filter->pipe->bind_fs_state(filter->pipe, filter->fs); |
| filter->pipe->set_framebuffer_state(filter->pipe, &fb_state); |
| filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport); |
| filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad); |
| filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves); |
| |
| util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4); |
| } |