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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2019 Blender Foundation. */
/** \file
* \ingroup draw_engine
*/
#include "DRW_render.h"
#include "BKE_vfont.h"
#include "DNA_curve_types.h"
#include "overlay_private.h"
void OVERLAY_edit_text_cache_init(OVERLAY_Data *vedata)
{
OVERLAY_PassList *psl = vedata->psl;
OVERLAY_PrivateData *pd = vedata->stl->pd;
const DRWContextState *draw_ctx = DRW_context_state_get();
View3D *v3d = draw_ctx->v3d;
DRWShadingGroup *grp;
GPUShader *sh;
DRWState state;
pd->edit_curve.show_handles = v3d->overlay.handle_display != CURVE_HANDLE_NONE;
pd->edit_curve.handle_display = v3d->overlay.handle_display;
pd->shdata.edit_curve_normal_length = v3d->overlay.normals_length;
/* Run Twice for in-front passes. */
for (int i = 0; i < 2; i++) {
state = DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH;
state |= ((i == 0) ? DRW_STATE_DEPTH_LESS_EQUAL : DRW_STATE_DEPTH_ALWAYS);
DRW_PASS_CREATE(psl->edit_text_wire_ps[i], state | pd->clipping_state);
sh = OVERLAY_shader_uniform_color();
pd->edit_text_wire_grp[i] = grp = DRW_shgroup_create(sh, psl->edit_text_wire_ps[i]);
DRW_shgroup_uniform_vec4_copy(grp, "color", G_draw.block.colorWire);
}
{
state = DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_ALPHA;
DRW_PASS_CREATE(psl->edit_text_overlay_ps, state | pd->clipping_state);
sh = OVERLAY_shader_uniform_color();
pd->edit_text_overlay_grp = grp = DRW_shgroup_create(sh, psl->edit_text_overlay_ps);
DRW_shgroup_uniform_vec4(grp, "color", pd->edit_text.overlay_color, 1);
state = DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_MUL | DRW_STATE_DEPTH_GREATER_EQUAL |
pd->clipping_state;
DRW_PASS_INSTANCE_CREATE(psl->edit_text_darken_ps, psl->edit_text_overlay_ps, state);
}
{
/* Create view which will render everything (hopefully) behind the text geometry. */
DRWView *default_view = (DRWView *)DRW_view_default_get();
pd->view_edit_text = DRW_view_create_with_zoffset(default_view, draw_ctx->rv3d, -5.0f);
}
}
/* Use 2D quad corners to create a matrix that set
* a [-1..1] quad at the right position. */
static void v2_quad_corners_to_mat4(const float corners[4][2], float r_mat[4][4])
{
unit_m4(r_mat);
sub_v2_v2v2(r_mat[0], corners[1], corners[0]);
sub_v2_v2v2(r_mat[1], corners[3], corners[0]);
mul_v2_fl(r_mat[0], 0.5f);
mul_v2_fl(r_mat[1], 0.5f);
copy_v2_v2(r_mat[3], corners[0]);
add_v2_v2(r_mat[3], r_mat[0]);
add_v2_v2(r_mat[3], r_mat[1]);
}
static void edit_text_cache_populate_select(OVERLAY_Data *vedata, Object *ob)
{
OVERLAY_PrivateData *pd = vedata->stl->pd;
const Curve *cu = ob->data;
EditFont *ef = cu->editfont;
float final_mat[4][4], box[4][2];
struct GPUBatch *geom = DRW_cache_quad_get();
for (int i = 0; i < ef->selboxes_len; i++) {
EditFontSelBox *sb = &ef->selboxes[i];
float selboxw;
if (i + 1 != ef->selboxes_len) {
if (ef->selboxes[i + 1].y == sb->y) {
selboxw = ef->selboxes[i + 1].x - sb->x;
}
else {
selboxw = sb->w;
}
}
else {
selboxw = sb->w;
}
/* NOTE: v2_quad_corners_to_mat4 don't need the 3rd corner. */
if (sb->rot == 0.0f) {
copy_v2_fl2(box[0], sb->x, sb->y);
copy_v2_fl2(box[1], sb->x + selboxw, sb->y);
copy_v2_fl2(box[3], sb->x, sb->y + sb->h);
}
else {
float mat[2][2];
angle_to_mat2(mat, sb->rot);
copy_v2_fl2(box[0], sb->x, sb->y);
mul_v2_v2fl(box[1], mat[0], selboxw);
add_v2_v2(box[1], &sb->x);
mul_v2_v2fl(box[3], mat[1], sb->h);
add_v2_v2(box[3], &sb->x);
}
v2_quad_corners_to_mat4(box, final_mat);
mul_m4_m4m4(final_mat, ob->obmat, final_mat);
DRW_shgroup_call_obmat(pd->edit_text_overlay_grp, geom, final_mat);
}
}
static void edit_text_cache_populate_cursor(OVERLAY_Data *vedata, Object *ob)
{
OVERLAY_PrivateData *pd = vedata->stl->pd;
const Curve *cu = ob->data;
EditFont *edit_font = cu->editfont;
float(*cursor)[2] = edit_font->textcurs;
float mat[4][4];
v2_quad_corners_to_mat4(cursor, mat);
mul_m4_m4m4(mat, ob->obmat, mat);
struct GPUBatch *geom = DRW_cache_quad_get();
DRW_shgroup_call_obmat(pd->edit_text_overlay_grp, geom, mat);
}
static void edit_text_cache_populate_boxes(OVERLAY_Data *vedata, Object *ob)
{
OVERLAY_ExtraCallBuffers *cb = OVERLAY_extra_call_buffer_get(vedata, ob);
const Curve *cu = ob->data;
for (int i = 0; i < cu->totbox; i++) {
TextBox *tb = &cu->tb[i];
const bool is_active = (i == (cu->actbox - 1));
float *color = is_active ? G_draw.block.colorActive : G_draw.block.colorWire;
if ((tb->w != 0.0f) || (tb->h != 0.0f)) {
float vecs[4][3];
vecs[0][0] = vecs[1][0] = vecs[2][0] = vecs[3][0] = cu->xof + tb->x;
vecs[0][1] = vecs[1][1] = vecs[2][1] = vecs[3][1] = cu->yof + tb->y + cu->fsize_realtime;
vecs[0][2] = vecs[1][2] = vecs[2][2] = vecs[3][2] = 0.001;
vecs[1][0] += tb->w;
vecs[2][0] += tb->w;
vecs[2][1] -= tb->h;
vecs[3][1] -= tb->h;
for (int j = 0; j < 4; j++) {
mul_v3_m4v3(vecs[j], ob->obmat, vecs[j]);
}
for (int j = 0; j < 4; j++) {
OVERLAY_extra_line_dashed(cb, vecs[j], vecs[(j + 1) % 4], color);
}
}
}
}
void OVERLAY_edit_text_cache_populate(OVERLAY_Data *vedata, Object *ob)
{
OVERLAY_PrivateData *pd = vedata->stl->pd;
struct GPUBatch *geom;
bool do_in_front = (ob->dtx & OB_DRAW_IN_FRONT) != 0;
geom = DRW_cache_text_edge_wire_get(ob);
if (geom) {
DRW_shgroup_call(pd->edit_text_wire_grp[do_in_front], geom, ob);
}
edit_text_cache_populate_select(vedata, ob);
edit_text_cache_populate_cursor(vedata, ob);
edit_text_cache_populate_boxes(vedata, ob);
}
void OVERLAY_edit_text_draw(OVERLAY_Data *vedata)
{
OVERLAY_PrivateData *pd = vedata->stl->pd;
OVERLAY_PassList *psl = vedata->psl;
OVERLAY_FramebufferList *fbl = vedata->fbl;
if (DRW_state_is_fbo()) {
GPU_framebuffer_bind(fbl->overlay_default_fb);
}
DRW_draw_pass(psl->edit_text_wire_ps[0]);
DRW_draw_pass(psl->edit_text_wire_ps[1]);
DRW_view_set_active(pd->view_edit_text);
/* Alpha blended. */
copy_v4_fl4(pd->edit_text.overlay_color, 0.8f, 0.8f, 0.8f, 0.5f);
DRW_draw_pass(psl->edit_text_overlay_ps);
/* Multiply previous result where depth test fail. */
copy_v4_fl4(pd->edit_text.overlay_color, 0.0f, 0.0f, 0.0f, 1.0f);
DRW_draw_pass(psl->edit_text_darken_ps);
}
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