Differential D10430 Diff 34324 source/blender/draw/engines/gpencil/gpencil_antialiasing.c

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source/blender/draw/engines/gpencil/gpencil_antialiasing.c

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*/		*/

/** \file		/** \file
* \ingroup draw		* \ingroup draw
*/		*/

#include "DRW_render.h"		#include "DRW_render.h"

		#include "BLI_jitter_2d.h"

#include "gpencil_engine.h"		#include "gpencil_engine.h"

#include "smaa_textures.h"		#include "smaa_textures.h"

void GPENCIL_antialiasing_init(struct GPENCIL_Data *vedata)		#define NUM_JITTER_SAMPLES 11

		static struct {
		bool init;
		float jitter_5[5][2];
		float jitter_8[8][2];
		float jitter_11[11][2];
		float jitter_16[16][2];
		} e_data = {false};

		static void gpencil_taa_jitter_init_order(float (*table)[2], int num)
		{
		BLI_jitter_init(table, num);

		/* find closest element to center */
		int closest_index = 0;
		float closest_squared_distance = 1.0f;

		for (int index = 0; index < num; index++) {
		const float squared_dist = square_f(table[index][0]) + square_f(table[index][1]);
		if (squared_dist < closest_squared_distance) {
		closest_squared_distance = squared_dist;
		closest_index = index;
		}
		}

		/* move jitter table so that closest sample is in center */
		for (int index = 0; index < num; index++) {
		sub_v2_v2(table[index], table[closest_index]);
		mul_v2_fl(table[index], 2.0f);
		}

		/* swap center sample to the start of the table */
		if (closest_index != 0) {
		swap_v2_v2(table[0], table[closest_index]);
		}

		/* Sort list based on farthest distance with previous. */
		for (int i = 0; i < num - 2; i++) {
		float f_squared_dist = 0.0;
		int f_index = i;
		for (int j = i + 1; j < num; j++) {
		const float squared_dist = square_f(table[i][0] - table[j][0]) +
		square_f(table[i][1] - table[j][1]);
		if (squared_dist > f_squared_dist) {
		f_squared_dist = squared_dist;
		f_index = j;
		}
		}
		swap_v2_v2(table[i + 1], table[f_index]);
		}
		}

		static void gpencil_taa_jitter_init(void)
		{
		if (e_data.init == false) {
		e_data.init = true;
		gpencil_taa_jitter_init_order(e_data.jitter_5, 5);
		gpencil_taa_jitter_init_order(e_data.jitter_8, 8);
		gpencil_taa_jitter_init_order(e_data.jitter_11, 11);
		gpencil_taa_jitter_init_order(e_data.jitter_16, 16);
		}
		}

		int GPENCIL_antialiasing_sample_count_get(GPENCIL_PrivateData *pd)
		{
		if (!pd->is_render) {
		/* Only draw using SMAA. */
		return 1;
		}
		// TODO(jbakker): Make user setting in Render/Grease pencil panel.
		return NUM_JITTER_SAMPLES;
		}

		static void gpencil_antialiasing_init_simplified(struct GPENCIL_Data *vedata)
{		{
GPENCIL_PrivateData *pd = vedata->stl->pd;		GPENCIL_PrivateData *pd = vedata->stl->pd;
GPENCIL_FramebufferList *fbl = vedata->fbl;
GPENCIL_TextureList *txl = vedata->txl;
GPENCIL_PassList *psl = vedata->psl;		GPENCIL_PassList *psl = vedata->psl;
DRWShadingGroup *grp;		DRWShadingGroup *grp;

const float *size = DRW_viewport_size_get();		const float *size = DRW_viewport_size_get();
const float *sizeinv = DRW_viewport_invert_size_get();		const float *sizeinv = DRW_viewport_invert_size_get();
const float metrics[4] = {sizeinv[0], sizeinv[1], size[0], size[1]};		const float metrics[4] = {sizeinv[0], sizeinv[1], size[0], size[1]};

if (pd->simplify_antialias) {
/* No AA fallback. */		/* No AA fallback. */
DRW_PASS_CREATE(psl->smaa_resolve_ps, DRW_STATE_WRITE_COLOR \| DRW_STATE_BLEND_CUSTOM);		DRW_PASS_CREATE(psl->smaa_resolve_ps, DRW_STATE_WRITE_COLOR \| DRW_STATE_BLEND_CUSTOM);

GPUShader *sh = GPENCIL_shader_antialiasing(2);		GPUShader *sh = GPENCIL_shader_antialiasing(2);
grp = DRW_shgroup_create(sh, psl->smaa_resolve_ps);		grp = DRW_shgroup_create(sh, psl->smaa_resolve_ps);
DRW_shgroup_uniform_texture(grp, "blendTex", pd->color_tx);		DRW_shgroup_uniform_texture(grp, "blendTex", pd->color_tx);
DRW_shgroup_uniform_texture(grp, "colorTex", pd->color_tx);		DRW_shgroup_uniform_texture(grp, "colorTex", pd->color_tx);
DRW_shgroup_uniform_texture(grp, "revealTex", pd->reveal_tx);		DRW_shgroup_uniform_texture(grp, "revealTex", pd->reveal_tx);
DRW_shgroup_uniform_bool_copy(grp, "doAntiAliasing", false);		DRW_shgroup_uniform_bool_copy(grp, "doAntiAliasing", false);
DRW_shgroup_uniform_bool_copy(grp, "onlyAlpha", pd->draw_wireframe);		DRW_shgroup_uniform_bool_copy(grp, "onlyAlpha", pd->draw_wireframe);
DRW_shgroup_uniform_vec4_copy(grp, "viewportMetrics", metrics);		DRW_shgroup_uniform_vec4_copy(grp, "viewportMetrics", metrics);

DRW_shgroup_call_procedural_triangles(grp, NULL, 1);		DRW_shgroup_call_procedural_triangles(grp, NULL, 1);
return;
}		}

		static void gpencil_antialiasing_init_smaa(struct GPENCIL_Data *vedata)
		{
		GPENCIL_PrivateData *pd = vedata->stl->pd;
		GPENCIL_FramebufferList *fbl = vedata->fbl;
		GPENCIL_TextureList *txl = vedata->txl;
		GPENCIL_PassList *psl = vedata->psl;
		DRWShadingGroup *grp;

		const float *size = DRW_viewport_size_get();
		const float *sizeinv = DRW_viewport_invert_size_get();
		const float metrics[4] = {sizeinv[0], sizeinv[1], size[0], size[1]};

if (txl->smaa_search_tx == NULL) {		if (txl->smaa_search_tx == NULL) {
txl->smaa_search_tx = GPU_texture_create_2d(		txl->smaa_search_tx = GPU_texture_create_2d(
"smaa_search", SEARCHTEX_WIDTH, SEARCHTEX_HEIGHT, 1, GPU_R8, NULL);		"smaa_search", SEARCHTEX_WIDTH, SEARCHTEX_HEIGHT, 1, GPU_R8, NULL);
GPU_texture_update(txl->smaa_search_tx, GPU_DATA_UBYTE, searchTexBytes);		GPU_texture_update(txl->smaa_search_tx, GPU_DATA_UBYTE, searchTexBytes);

txl->smaa_area_tx = GPU_texture_create_2d(		txl->smaa_area_tx = GPU_texture_create_2d(
"smaa_area", AREATEX_WIDTH, AREATEX_HEIGHT, 1, GPU_RG8, NULL);		"smaa_area", AREATEX_WIDTH, AREATEX_HEIGHT, 1, GPU_RG8, NULL);
GPU_texture_update(txl->smaa_area_tx, GPU_DATA_UBYTE, areaTexBytes);		GPU_texture_update(txl->smaa_area_tx, GPU_DATA_UBYTE, areaTexBytes);
▲ Show 20 Lines • Show All 62 Lines • ▼ Show 20 Lines	if (txl->smaa_search_tx == NULL) {
DRW_shgroup_uniform_bool_copy(grp, "doAntiAliasing", true);		DRW_shgroup_uniform_bool_copy(grp, "doAntiAliasing", true);
DRW_shgroup_uniform_bool_copy(grp, "onlyAlpha", pd->draw_wireframe);		DRW_shgroup_uniform_bool_copy(grp, "onlyAlpha", pd->draw_wireframe);
DRW_shgroup_uniform_vec4_copy(grp, "viewportMetrics", metrics);		DRW_shgroup_uniform_vec4_copy(grp, "viewportMetrics", metrics);

DRW_shgroup_call_procedural_triangles(grp, NULL, 1);		DRW_shgroup_call_procedural_triangles(grp, NULL, 1);
}		}
}		}

		static float filter_blackman_harris(float x, const float width)
		{
		if (x > width * 0.5f) {
		return 0.0f;
		}
		x = 2.0f * M_PI * clamp_f((x / width + 0.5f), 0.0f, 1.0f);
		return 0.35875f - 0.48829f * cosf(x) + 0.14128f * cosf(2.0f * x) - 0.01168f * cosf(3.0f * x);
		}

		/* Compute weights for the 3x3 neighborhood using a 1.5px filter. */
		static void gpencil_antialiasing_weights_get(const float offset[2],
		float r_weights[9],
		float *r_weight_sum)
		{
		/* NOTE: If filter width is bigger than 2.0f, then we need to sample more neighborhood. */
		const float filter_width = 2.0f;
		*r_weight_sum = 0.0f;
		int i = 0;
		for (int x = -1; x <= 1; x++) {
		for (int y = -1; y <= 1; y++, i++) {
		float sample_co[2] = {x, y};
		add_v2_v2(sample_co, offset);
		float r = len_v2(sample_co);
		/* fclem: is radial distance ok here? */
		float weight = filter_blackman_harris(r, filter_width);
		*r_weight_sum += weight;
		r_weights[i] = weight;
		}
		}
		}

		static void gpencil_antialiasing_init_taa(struct GPENCIL_Data *vedata)
		{
		GPENCIL_PrivateData *pd = vedata->stl->pd;
		GPENCIL_TextureList *txl = vedata->txl;
		GPENCIL_PassList *psl = vedata->psl;
		DRWShadingGroup *grp;

		gpencil_taa_jitter_init();
		// Clear history buffers.
		DRW_texture_ensure_fullscreen_2d(&txl->history_buffer_tx, GPU_RGBA16F, DRW_TEX_FILTER);

		// Create taa resolve shader.
		{
		DRW_PASS_CREATE(psl->taa_accum_ps, DRW_STATE_WRITE_COLOR \| DRW_STATE_BLEND_ADD_FULL);
		DRW_PASS_INSTANCE_CREATE(psl->taa_accum_replace_ps, psl->taa_accum_ps, DRW_STATE_WRITE_COLOR);

		GPUShader *shader = GPENCIL_shader_antialiasing_accumulation_get();
		grp = DRW_shgroup_create(shader, psl->taa_accum_ps);
		/* TODO: Is this the correct texture?. */
		DRW_shgroup_uniform_texture_ex(grp, "colorBuffer", pd->color_tx, GPU_SAMPLER_DEFAULT);
		DRW_shgroup_uniform_float(grp, "samplesWeights", pd->taa_weights, 9);
		DRW_shgroup_call_procedural_triangles(grp, NULL, 1);
		}
		}

		void GPENCIL_antialiasing_init(struct GPENCIL_Data *vedata)
		{
		const GPENCIL_PrivateData *pd = vedata->stl->pd;

		switch (pd->anti_aliasing_mode) {
		case GPENCIL_AA_MODE_SIMPLIFIED:
		gpencil_antialiasing_init_simplified(vedata);
		break;
		case GPENCIL_AA_MODE_SMAA:
		gpencil_antialiasing_init_smaa(vedata);
		break;
		case GPENCIL_AA_MODE_TAA:
		gpencil_antialiasing_init_taa(vedata);
		break;
		}
		}

		void GPENCIL_antialiasing_setup(GPENCIL_Data *vedata)
		{
		GPENCIL_PrivateData *pd = vedata->stl->pd;

		const float *viewport_size = DRW_viewport_size_get();
		const DRWView *default_view = DRW_view_default_get();
		float *transform_offset;

		switch (pd->taa_sample_len) {
		default:
		case 5:
		transform_offset = e_data.jitter_5[min_ii(pd->taa_sample, 5)];
		break;
		case 8:
		transform_offset = e_data.jitter_8[min_ii(pd->taa_sample, 8)];
		break;
		case 11:
		transform_offset = e_data.jitter_11[min_ii(pd->taa_sample, 11)];
		break;
		case 16:
		transform_offset = e_data.jitter_16[min_ii(pd->taa_sample, 16)];
		break;
		}

		gpencil_antialiasing_weights_get(transform_offset, pd->taa_weights, &pd->taa_weights_sum);

		/* construct new matrices from transform delta */
		float winmat[4][4], viewmat[4][4], persmat[4][4];
		DRW_view_winmat_get(default_view, winmat, false);
		DRW_view_viewmat_get(default_view, viewmat, false);
		DRW_view_persmat_get(default_view, persmat, false);

		window_translate_m4(winmat,
		persmat,
		transform_offset[0] / viewport_size[0],
		transform_offset[1] / viewport_size[1]);

		if (pd->view) {
		/* When rendering just update the view. This avoids recomputing the culling. */
		DRW_view_update_sub(pd->view, viewmat, winmat);
		}
		else {
		/* TAA is not making a big change to the matrices.
		* Reuse the main view culling by creating a sub-view. */
		pd->view = DRW_view_create_sub(default_view, viewmat, winmat);
		}
		DRW_view_set_active(pd->view);
		}

void GPENCIL_antialiasing_draw(struct GPENCIL_Data *vedata)		void GPENCIL_antialiasing_draw(struct GPENCIL_Data *vedata)
{		{
GPENCIL_FramebufferList *fbl = vedata->fbl;		GPENCIL_FramebufferList *fbl = vedata->fbl;
GPENCIL_PrivateData *pd = vedata->stl->pd;		GPENCIL_PrivateData *pd = vedata->stl->pd;
GPENCIL_PassList *psl = vedata->psl;		GPENCIL_PassList *psl = vedata->psl;

if (!pd->simplify_antialias) {		switch (pd->anti_aliasing_mode) {
		case GPENCIL_AA_MODE_SIMPLIFIED:
		GPU_framebuffer_bind(pd->scene_fb);
		DRW_draw_pass(psl->smaa_resolve_ps);
		break;

		case GPENCIL_AA_MODE_SMAA:
GPU_framebuffer_bind(fbl->smaa_edge_fb);		GPU_framebuffer_bind(fbl->smaa_edge_fb);
DRW_draw_pass(psl->smaa_edge_ps);		DRW_draw_pass(psl->smaa_edge_ps);

GPU_framebuffer_bind(fbl->smaa_weight_fb);		GPU_framebuffer_bind(fbl->smaa_weight_fb);
DRW_draw_pass(psl->smaa_weight_ps);		DRW_draw_pass(psl->smaa_weight_ps);
}

GPU_framebuffer_bind(pd->scene_fb);		GPU_framebuffer_bind(pd->scene_fb);
DRW_draw_pass(psl->smaa_resolve_ps);		DRW_draw_pass(psl->smaa_resolve_ps);
		break;

		case GPENCIL_AA_MODE_TAA:
		/* TODO(jbakker): TAA resolve. */
		GPU_framebuffer_bind(pd->scene_fb);
		const bool is_first_taa_sample = pd->taa_sample == 0;
		const bool is_last_taa_sample = pd->taa_sample == pd->taa_sample_len - 1;
		if (is_first_taa_sample) {
		DRW_draw_pass(psl->taa_accum_replace_ps);
		}
		else if (is_last_taa_sample) {
		// if current sample is last sample, copy to scene_fb
		}
		else {
		DRW_draw_pass(psl->taa_accum_ps);
		}
		break;
		}
}		}