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draw_manager.cpp
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draw_manager.cpp
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#include <ft2build.h>
#include <freetype/freetype.h>
#include <freetype/ftglyph.h>
#include "draw_manager.hpp"
using namespace util::draw;
namespace
{
constexpr auto CIRCLE_POINT_COUNT = 64;
bool circle_points_initialized = false;
std::array<position, CIRCLE_POINT_COUNT * 8 + 8> circle_points;
void init_circle_points();
}
#pragma region util
static inline float inv_length(const position& lhs, const float fail_value)
{
const auto d = lhs.x * lhs.x + lhs.y * lhs.y;
if (d > 0.0f)
return 1.0f / std::sqrt(d);
return fail_value;
}
#pragma endregion
#pragma region draw_buffer
rect draw_buffer::cur_clip_rect()
{
if (clip_rect_stack.empty())
{
return rect{ position{0.f, 0.f}, manager->get_screen_size() };
}
return clip_rect_stack.back().first;
}
rect draw_buffer::cur_non_circle_clip_rect()
{
for (const auto& clip_entry : clip_rect_stack)
{
if (clip_entry.second)
continue;
return clip_entry.first;
}
return rect{ position{0.f, 0.f}, manager->get_screen_size() };
}
rect draw_buffer::clip_rect_to_cur_rect(const rect& clip)
{
const auto cur_rect = cur_clip_rect();
rect new_clip{
std::max(cur_rect.xy.x, clip.xy.x),
std::max(cur_rect.xy.y, clip.xy.y),
std::min(cur_rect.z, clip.z),
std::min(cur_rect.w, clip.w)
};
return new_clip;
}
void draw_buffer::update_clip_rect()
{
if (!cmds.empty() && !clip_rect_stack.empty()
&& cur_clip_rect() == cmds.back().clip_rect.float_rect()
&& clip_rect_stack.back().second == cmds.back().circle_scissor)
return;
if (!cmds.empty())
{
auto& cur_cmd = cmds.back();
if (!cur_cmd.elem_count)
{
cur_cmd.clip_rect = cur_clip_rect();
cur_cmd.circle_scissor = clip_rect_stack.empty() ? false : clip_rect_stack.back().second;
if (cur_cmd.circle_scissor)
cur_cmd.circle_outer_clip = cur_non_circle_clip_rect();
cur_cmd.tex_id = cur_tex_id();
cur_cmd.font_texture = (cur_cmd.tex_id == manager->fonts->tex_id && manager->fonts->tex_id != nullptr);
cur_cmd.native_texture = !cmds.empty() && cmds.back().native_texture;
return;
}
}
//Allocate new command
draw_cmd new_cmd = {};
new_cmd.clip_rect = cur_clip_rect();
new_cmd.circle_scissor = clip_rect_stack.empty() ? false : clip_rect_stack.back().second;
if (new_cmd.circle_scissor)
new_cmd.circle_outer_clip = cur_non_circle_clip_rect();
new_cmd.elem_count = 0;
new_cmd.tex_id = cur_tex_id();
new_cmd.font_texture = (new_cmd.tex_id == manager->fonts->tex_id && manager->fonts->tex_id != nullptr);
new_cmd.native_texture = !cmds.empty() && cmds.back().native_texture;
if (!cmds.empty())
new_cmd.key_color = cmds.back().key_color;
cmds.emplace_back(new_cmd);
}
void draw_buffer::push_font(font* font)
{
cur_font = font;
font_stack.emplace_back(font);
push_tex_id(font->container_atlas->tex_id, true);
}
void draw_buffer::pop_font()
{
assert(!font_stack.empty());
pop_tex_id();
font_stack.pop_back();
if (!font_stack.empty())
{
cur_font = font_stack.back();
push_tex_id(cur_font->container_atlas->tex_id);
return;
}
cur_font = nullptr;
}
void draw_buffer::update_tex_id(const bool force_font, const bool native_texture)
{
const auto cur_id = cur_tex_id();
if (!cmds.empty() && !tex_id_stack.empty() && cur_id == cmds.back().tex_id
&& !force_font && !native_texture)
return;
if (!cmds.empty())
{
auto& cur_cmd = cmds.back();
if (!cur_cmd.elem_count)
{
cur_cmd.clip_rect = cur_clip_rect();
cur_cmd.circle_scissor = clip_rect_stack.empty() ? false : clip_rect_stack.back().second;
if (cur_cmd.circle_scissor)
cur_cmd.circle_outer_clip = cur_non_circle_clip_rect();
cur_cmd.tex_id = cur_tex_id();
cur_cmd.font_texture = (cur_cmd.tex_id == manager->fonts->tex_id && manager->fonts->tex_id != nullptr) || force_font;
cur_cmd.native_texture = native_texture;
return;
}
}
//Allocate new cmd
draw_cmd new_cmd = {};
new_cmd.clip_rect = cur_clip_rect();
new_cmd.circle_scissor = clip_rect_stack.empty() ? false : clip_rect_stack.back().second;
if (new_cmd.circle_scissor)
new_cmd.circle_outer_clip = cur_non_circle_clip_rect();
new_cmd.elem_count = 0;
new_cmd.tex_id = cur_id;
new_cmd.font_texture =
(cur_id == manager->fonts->tex_id && manager->fonts->tex_id != nullptr)
|| force_font;
new_cmd.native_texture = native_texture;
if (!cmds.empty())
new_cmd.key_color = cmds.back().key_color;
cmds.emplace_back(new_cmd);
}
size_t draw_buffer::force_new_cmd()
{
if (!cmds.empty() && cmds.back().elem_count == 0u)
return (cmds.size() - 1);
// Allocate a new command
draw_cmd new_cmd = {};
new_cmd.clip_rect = cur_clip_rect();
new_cmd.circle_scissor = clip_rect_stack.empty() ? false : clip_rect_stack.back().second;
if (new_cmd.circle_scissor)
new_cmd.circle_outer_clip = cur_non_circle_clip_rect();
new_cmd.elem_count = 0;
new_cmd.tex_id = cur_tex_id();
new_cmd.font_texture = (new_cmd.tex_id == manager->fonts->tex_id && manager->fonts->tex_id != nullptr);
new_cmd.native_texture = !cmds.empty() && cmds.back().native_texture;
if (!cmds.empty())
new_cmd.key_color = cmds.back().key_color;
const auto new_idx = cmds.size();
cmds.emplace_back(new_cmd);
return new_idx;
}
void draw_buffer::update_matrix_translate(const position& xy_translate, const size_t cmd_idx)
{
if (cmd_idx != -1)
{
if (cmds.size() <= cmd_idx)
return;
auto& cmd = cmds[cmd_idx];
cmd.matrix[0][3] += xy_translate.x;
cmd.matrix[1][3] += xy_translate.y;
return;
}
if (cmds.empty())
return;
for (auto& cmd : cmds)
{
cmd.matrix[0][3] += xy_translate.x;
cmd.matrix[1][3] += xy_translate.y;
}
}
void draw_buffer::set_blur(const uint8_t strength, const uint8_t passes)
{
if (!cmds.empty() && cmds.back().blur_strength == strength && cmds.back().blur_pass_count == passes)
return;
//Allocate new command
draw_cmd new_cmd = {};
new_cmd.clip_rect = cur_clip_rect();
new_cmd.circle_scissor = clip_rect_stack.empty() ? false : clip_rect_stack.back().second;
if (new_cmd.circle_scissor)
new_cmd.circle_outer_clip = cur_non_circle_clip_rect();
new_cmd.elem_count = 0;
new_cmd.tex_id = cur_tex_id();
new_cmd.font_texture = (new_cmd.tex_id == manager->fonts->tex_id && manager->fonts->tex_id != nullptr);
new_cmd.blur_strength = strength;
new_cmd.blur_pass_count = passes;
new_cmd.native_texture = !cmds.empty() && cmds.back().native_texture;
if (!cmds.empty())
new_cmd.key_color = cmds.back().key_color;
cmds.emplace_back(new_cmd);
}
void draw_buffer::set_key_color(const color col)
{
//Allocate new command
draw_cmd new_cmd = {};
new_cmd.clip_rect = cur_clip_rect();
new_cmd.circle_scissor = clip_rect_stack.empty() ? false : clip_rect_stack.back().second;
if (new_cmd.circle_scissor)
new_cmd.circle_outer_clip = cur_non_circle_clip_rect();
new_cmd.elem_count = 0;
new_cmd.tex_id = cur_tex_id();
new_cmd.font_texture = (new_cmd.tex_id == manager->fonts->tex_id
&& manager->fonts->tex_id != nullptr);
new_cmd.key_color = col;
new_cmd.native_texture = !cmds.empty() && cmds.back().native_texture;
cmds.emplace_back(new_cmd);
}
void draw_buffer::triangle_filled(const position& p1,
const position& p2,
const position& p3,
const pack_color col_p1,
const pack_color col_p2,
const pack_color col_p3,
const bool anti_aliased)
{
reserve_primitives(3, 3);
const position uv = { 1.f, 1.f };
write_vtx(p1, uv, col_p1);
write_vtx(p2, uv, col_p2);
write_vtx(p3, uv, col_p3);
write_idx(cur_idx);
write_idx(cur_idx + 1);
write_idx(cur_idx + 2);
cur_idx += 3;
if(anti_aliased)
{
line(p1, p2, col_p1, col_p2, 1.f, true);
line(p2, p3, col_p2, col_p3, 1.f, true);
line(p3, p1, col_p3, col_p1, 1.f, true);
}
}
void draw_buffer::rectangle_filled(const position& top_left,
const position& bot_right,
const pack_color col_top_left,
const pack_color col_top_right,
const pack_color col_bot_left,
const pack_color col_bot_right)
{
triangle_filled({ top_left.x, bot_right.y }, top_left, bot_right, col_bot_left, col_top_left, col_bot_right);
triangle_filled(top_left, { bot_right.x, top_left.y }, bot_right, col_top_left, col_top_right, col_bot_right);
}
void draw_buffer::rectangle(const position& top_left_pre,
const position& bot_right_pre,
const pos_type thickness,
const pack_color col_top_left,
const pack_color col_top_right,
const pack_color col_bot_left,
const pack_color col_bot_right,
const bool clipped)
{
const auto top_left = (clipped
? position{ top_left_pre.x + thickness / 2, top_left_pre.y - thickness / 2 }
: position{ top_left_pre.x, top_left_pre.y - thickness / 2 });
const auto bot_right = (clipped ? position{ bot_right_pre.x - thickness / 2, bot_right_pre.y } : bot_right_pre);
reserve_path(5);
push_path(top_left);
push_path({ top_left.x, bot_right.y });
push_path(bot_right);
push_path({ bot_right.x, top_left_pre.y });
push_path({ top_left.x + thickness / 2 - 1.f, top_left_pre.y });
pack_color colors[] = { col_top_left, col_bot_left, col_bot_right, col_top_right, col_top_left };
poly_line(path_data(), 5u, colors, thickness);
clear_path();
}
static inline void generate_circle_metadata(size_t& start_idx, size_t& point_count, size_t& skip_count, const pos_type radius, pos_type degrees, pos_type start_degree)
{
degrees = std::fabs(degrees);
start_degree = std::fabs(start_degree);
while (degrees > 360.f)
degrees -= 360.f;
while (start_degree > 360.f)
start_degree -= 360.f;
point_count = std::clamp(static_cast<size_t>(degrees * (1 / 360.f) * circle_points.size()) + 1, static_cast<size_t>(0u), circle_points.size());
// TODO: how do we properly calculate the index here?
start_idx = std::clamp(static_cast<size_t>((start_degree * (1 / 360.f)) * circle_points.size()), static_cast<size_t>(0u), circle_points.size() - 1);
#if 0
// r = 1 -> 4 points so skip_count = CIRCLE_POINTS_COUNT, r = 100 -> all points so skip_count = 0
skip_count = std::clamp(CIRCLE_POINT_COUNT - static_cast<int>((radius - 1.f) * (CIRCLE_POINT_COUNT / 100.f) * 2.5f), 0, CIRCLE_POINT_COUNT);
if (skip_count > 0)
point_count /= skip_count;
#else
skip_count = 0;
#endif
}
static inline void generate_circle_points(position* point_buf, const size_t start_idx, const size_t point_count, const size_t skip_count, const pos_type radius, const position& center)
{
auto cur_idx = std::clamp(start_idx, static_cast<size_t>(0u), circle_points.size());
for (auto i = 0u; i < point_count; ++i)
{
if (cur_idx >= circle_points.size())
cur_idx -= circle_points.size();
point_buf[i] = circle_points[cur_idx] * radius + center;
cur_idx += 1 + skip_count;
}
}
void draw_buffer::circle_filled(const position& center,
const pos_type radius,
const pack_color inner_col,
const pack_color outer_col,
uint32_t parts,
const pos_type degrees,
pos_type start_degree,
bool anti_aliasing)
{
size_t start_idx, point_count, skip_count;
generate_circle_metadata(start_idx, point_count, skip_count, radius, degrees, start_degree);
const auto points = reinterpret_cast<position*>(_alloca(sizeof(position) * point_count));
generate_circle_points(points, start_idx, point_count, skip_count, radius, center);
//poly_fill(points, point_count, outer_col);
fill_circle_impl(center, points, point_count, inner_col, outer_col);
if (anti_aliasing)
{
poly_line(points, point_count, outer_col, 1.f, true);
}
}
void draw_buffer::circle(const position& center,
const pos_type radius,
const pack_color col,
const pos_type thickness,
uint32_t parts,
pos_type degrees,
pos_type start_degree, const bool anti_aliasing)
{
size_t start_idx, point_count, skip_count;
generate_circle_metadata(start_idx, point_count, skip_count, radius, degrees, start_degree);
const auto points = reinterpret_cast<position*>(_alloca(sizeof(position) * point_count));
generate_circle_points(points, start_idx, point_count, skip_count, radius, center);
// when doing poly_line here we have gaps in the circle so we just do this
for (auto i = 0u; i < point_count - 1; ++i)
{
line(points[i], points[i + 1], col, thickness, anti_aliasing);
}
}
void draw_buffer::fill_circle_impl(const position& center,
position* vtx,
const uint32_t vtx_count,
const pack_color col_inner,
const pack_color col_outer)
{
if (vtx_count < 2)
return;
const auto uv = manager->fonts->tex_uv_white_pixel;
prim_reserve((vtx_count - 1) * 3, vtx_count + 1);
write_vtx(center, uv, col_inner);
const auto center_idx = cur_idx;
cur_idx++;
write_vtx(*vtx, uv, col_outer);
for (auto i = 1u; i < vtx_count; i++)
{
write_vtx(vtx[i], uv, col_outer);
write_idx(center_idx);
write_idx(cur_idx + 1);
write_idx(cur_idx);
cur_idx++;
}
cur_idx++;
}
//TODO: Instead of dupe code, stack alloc points_count colors and fill with col in a inlined func?
void draw_buffer::poly_line(position* points,
const uint32_t points_count,
const pack_color col,
const pos_type thickness,
const bool anti_aliased)
{
// from dear imgui
if (points_count < 2)
return;
constexpr auto aa_size = 1.f;
const auto uv = position{ 1.f, 1.f };
const auto thick_line = thickness > 1.f;
const auto col_trans = pack_color{ col.r(), col.g(), col.b(), 0 };
const auto count = points_count - 1;
if (anti_aliased)
{
const auto idx_count = thick_line ? count * 18 : count * 12;
const auto vtx_count = thick_line ? points_count * 4 : points_count * 3;
reserve_primitives(idx_count, vtx_count);
const auto tmp_normals = reinterpret_cast<position*>(alloca(
points_count * (thick_line ? 5 : 3) * sizeof(position)));
const auto tmp_points = tmp_normals + points_count;
for (auto i = 0u; i < count; ++i)
{
const auto j = (i + 1 == points_count) ? 0 : i + 1;
const auto delta = (points[j] - points[i]).normalize();
tmp_normals[i] = { delta.y, -delta.x };
}
tmp_normals[points_count - 1] = tmp_normals[points_count - 2];
if (!thick_line)
{
tmp_points[0] = points[0] + tmp_normals[0] * aa_size;
tmp_points[1] = points[0] - tmp_normals[0] * aa_size;
tmp_points[(points_count - 1) * 2 + 0] = points[points_count - 1] + tmp_normals[points_count - 1] * aa_size;
tmp_points[(points_count - 1) * 2 + 1] = points[points_count - 1] - tmp_normals[points_count - 1] * aa_size;
auto idx = cur_idx;
for (auto i = 0u; i < count; ++i)
{
const auto j = (i + 1 == points_count) ? 0 : i + 1;
const auto idx2 = (i + 1 == points_count) ? cur_idx : idx + 3;
auto dm = ((tmp_normals[i] + tmp_normals[j]) * 0.5);
// IM_FIXNORMAL2F
auto len_sqr = dm.length_sqr();
if (len_sqr < 0.5f)
len_sqr = 0.5f;
dm *= (1.f / len_sqr);
dm *= aa_size;
const auto vtx_out = &tmp_points[j * 2];
vtx_out[0] = points[j] + dm;
vtx_out[1] = points[j] - dm;
write_idx(idx2);
write_idx(idx);
write_idx(idx + 2);
write_idx(idx + 2);
write_idx(idx2 + 2);
write_idx(idx2);
write_idx(idx2 + 1);
write_idx(idx + 1);
write_idx(idx);
write_idx(idx);
write_idx(idx2);
write_idx(idx2 + 1);
idx = idx2;
}
for (auto i = 0u; i < points_count; ++i)
{
write_vtx(points[i], uv, col);
write_vtx(tmp_points[i * 2], uv, col_trans);
write_vtx(tmp_points[i * 2 + 1], uv, col_trans);
}
}
else
{
const auto half_inner_thickness = (thickness - aa_size) * 0.5f;
tmp_points[0] = points[0] + tmp_normals[0] * (half_inner_thickness + aa_size);
tmp_points[1] = points[0] + tmp_normals[0] * (half_inner_thickness);
tmp_points[2] = points[0] - tmp_normals[0] * (half_inner_thickness);
tmp_points[3] = points[0] - tmp_normals[0] * (half_inner_thickness + aa_size);
tmp_points[(points_count - 1) * 4] = points[points_count - 1] + tmp_normals[points_count - 1] * (
half_inner_thickness + aa_size);
tmp_points[(points_count - 1) * 4 + 1] = points[points_count - 1] + tmp_normals[points_count - 1] * (
half_inner_thickness);
tmp_points[(points_count - 1) * 4 + 2] = points[points_count - 1] - tmp_normals[points_count - 1] * (
half_inner_thickness);
tmp_points[(points_count - 1) * 4 + 3] = points[points_count - 1] - tmp_normals[points_count - 1] * (
half_inner_thickness + aa_size);
auto idx = cur_idx;
for (auto i = 0u; i < count; ++i)
{
const auto j = (i + 1 == points_count) ? 0 : i + 1;
const auto idx2 = (i + 1 == points_count) ? cur_idx : idx + 4;
auto dm = (tmp_normals[i] + tmp_normals[j]) * 0.5f;
// IM_FIXNORMAL2F
auto len_sqr = dm.length_sqr();
if (len_sqr < 0.5f)
len_sqr = 0.5f;
dm *= (1.f / len_sqr);
const auto dm_out = dm * (half_inner_thickness + aa_size);
const auto dm_in = dm * half_inner_thickness;
const auto vtx_out = &tmp_points[j * 4];
vtx_out[0] = points[j] + dm_out;
vtx_out[1] = points[j] + dm_in;
vtx_out[2] = points[j] - dm_in;
vtx_out[3] = points[j] - dm_out;
write_idx(idx2 + 1);
write_idx(idx + 1);
write_idx(idx + 2);
write_idx(idx + 2);
write_idx(idx2 + 2);
write_idx(idx2 + 1);
write_idx(idx2 + 1);
write_idx(idx + 1);
write_idx(idx);
write_idx(idx);
write_idx(idx2);
write_idx(idx2 + 1);
write_idx(idx2 + 2);
write_idx(idx + 2);
write_idx(idx + 3);
write_idx(idx + 3);
write_idx(idx2 + 3);
write_idx(idx2 + 2);
idx = idx2;
}
for (auto i = 0u; i < points_count; ++i)
{
write_vtx(tmp_points[i * 4], uv, col_trans);
write_vtx(tmp_points[i * 4 + 1], uv, col);
write_vtx(tmp_points[i * 4 + 2], uv, col);
write_vtx(tmp_points[i * 4 + 3], uv, col_trans);
}
}
cur_idx += vtx_count;
}
else
{
const auto idx_count = count * 6;
const auto vtx_count = count * 4;
reserve_primitives(idx_count, vtx_count);
for (auto i = 0u; i < count; ++i)
{
const auto j = (i + 1 == points_count) ? 0 : i + 1;
const auto& p1 = points[i];
const auto& p2 = points[j];
auto d = (p2 - p1).normalize();
d *= (thickness * 0.5f);
std::swap(d.x, d.y);
d.x = -d.x;
write_vtx(p1 + d, uv, col);
write_vtx(p2 + d, uv, col);
write_vtx(p2 - d, uv, col);
write_vtx(p1 - d, uv, col);
write_idx(cur_idx);
write_idx(cur_idx + 1);
write_idx(cur_idx + 2);
write_idx(cur_idx);
write_idx(cur_idx + 2);
write_idx(cur_idx + 3);
cur_idx += 4;
}
}
}
void draw_buffer::poly_line(position* points,
const uint32_t points_count,
const pack_color* cols,
const pos_type thickness,
const bool anti_aliased)
{
// from dear imgui
if (points_count < 2)
return;
constexpr auto aa_size = 1.f;
const auto uv = position{ 1.f, 1.f };
const auto thick_line = thickness > 1.f;
//const auto col_trans = pack_color{ col.r(), col.g(), col.b(), 0 };
const auto count = points_count - 1;
if (anti_aliased)
{
const auto idx_count = thick_line ? count * 18 : count * 12;
const auto vtx_count = thick_line ? points_count * 4 : points_count * 3;
reserve_primitives(idx_count, vtx_count);
const auto tmp_normals = reinterpret_cast<position*>(alloca(
points_count * (thick_line ? 5 : 3) * sizeof(position)));
const auto tmp_points = tmp_normals + points_count;
for (auto i = 0u; i < count; ++i)
{
const auto j = (i + 1 == points_count) ? 0 : i + 1;
const auto delta = (points[j] - points[i]).normalize();
tmp_normals[i] = { delta.y, -delta.x };
}
tmp_normals[points_count - 1] = tmp_normals[points_count - 2];
if (!thick_line)
{
tmp_points[0] = points[0] + tmp_normals[0] * aa_size;
tmp_points[1] = points[0] - tmp_normals[0] * aa_size;
tmp_points[(points_count - 1) * 2 + 0] = points[points_count - 1] + tmp_normals[points_count - 1] * aa_size;
tmp_points[(points_count - 1) * 2 + 1] = points[points_count - 1] - tmp_normals[points_count - 1] * aa_size;
auto idx = cur_idx;
for (auto i = 0u; i < count; ++i)
{
const auto j = (i + 1 == points_count) ? 0 : i + 1;
const auto idx2 = (i + 1 == points_count) ? cur_idx : idx + 3;
auto dm = ((tmp_normals[i] + tmp_normals[j]) * 0.5);
// IM_FIXNORMAL2F
auto len_sqr = dm.length_sqr();
if (len_sqr < 0.5f)
len_sqr = 0.5f;
dm *= (1.f / len_sqr);
dm *= aa_size;
const auto vtx_out = &tmp_points[j * 2];
vtx_out[0] = points[j] + dm;
vtx_out[1] = points[j] - dm;
write_idx(idx2);
write_idx(idx);
write_idx(idx + 2);
write_idx(idx + 2);
write_idx(idx2 + 2);
write_idx(idx2);
write_idx(idx2 + 1);
write_idx(idx + 1);
write_idx(idx);
write_idx(idx);
write_idx(idx2);
write_idx(idx2 + 1);
idx = idx2;
}
for (auto i = 0u; i < points_count; ++i)
{
const auto col = cols[i];
const auto col_trans = pack_color{ col.r(), col.g(), col.b(), 0 };
write_vtx(points[i], uv, col);
write_vtx(tmp_points[i * 2], uv, col_trans);
write_vtx(tmp_points[i * 2 + 1], uv, col_trans);
}
}
else
{
const auto half_inner_thickness = (thickness - aa_size) * 0.5f;
tmp_points[0] = points[0] + tmp_normals[0] * (half_inner_thickness + aa_size);
tmp_points[1] = points[0] + tmp_normals[0] * (half_inner_thickness);
tmp_points[2] = points[0] - tmp_normals[0] * (half_inner_thickness);
tmp_points[3] = points[0] - tmp_normals[0] * (half_inner_thickness + aa_size);
tmp_points[(points_count - 1) * 4] = points[points_count - 1] + tmp_normals[points_count - 1] * (
half_inner_thickness + aa_size);
tmp_points[(points_count - 1) * 4 + 1] = points[points_count - 1] + tmp_normals[points_count - 1] * (
half_inner_thickness);
tmp_points[(points_count - 1) * 4 + 2] = points[points_count - 1] - tmp_normals[points_count - 1] * (
half_inner_thickness);
tmp_points[(points_count - 1) * 4 + 3] = points[points_count - 1] - tmp_normals[points_count - 1] * (
half_inner_thickness + aa_size);
auto idx = cur_idx;
for (auto i = 0u; i < count; ++i)
{
const auto j = (i + 1 == points_count) ? 0 : i + 1;
const auto idx2 = (i + 1 == points_count) ? cur_idx : idx + 4;
auto dm = (tmp_normals[i] + tmp_normals[j]) * 0.5f;
dm.normalize();
const auto dm_out = dm * (half_inner_thickness + aa_size);
const auto dm_in = dm * half_inner_thickness;
const auto vtx_out = &tmp_points[j * 4];
vtx_out[0] = points[j] + dm_out;
vtx_out[1] = points[j] + dm_in;
vtx_out[2] = points[j] - dm_in;
vtx_out[3] = points[j] - dm_out;
write_idx(idx2 + 1);
write_idx(idx + 1);
write_idx(idx + 2);
write_idx(idx + 2);
write_idx(idx2 + 2);
write_idx(idx2 + 1);
write_idx(idx2 + 1);
write_idx(idx + 1);
write_idx(idx);
write_idx(idx);
write_idx(idx2);
write_idx(idx2 + 1);
write_idx(idx2 + 2);
write_idx(idx + 2);
write_idx(idx + 3);
write_idx(idx + 3);
write_idx(idx2 + 3);
write_idx(idx2 + 2);
idx = idx2;
}
for (auto i = 0u; i < points_count; ++i)
{
const auto col = cols[i];
const auto col_trans = pack_color{ col.r(), col.g(), col.b(), 0 };
write_vtx(tmp_points[i * 4], uv, col_trans);
write_vtx(tmp_points[i * 4 + 1], uv, col);
write_vtx(tmp_points[i * 4 + 2], uv, col);
write_vtx(tmp_points[i * 4 + 3], uv, col_trans);
}
}
cur_idx += vtx_count;
}
else
{
const auto idx_count = count * 6;
const auto vtx_count = count * 4;
reserve_primitives(idx_count, vtx_count);
for (auto i = 0u; i < count; ++i)
{
const auto j = (i + 1 == points_count) ? 0 : i + 1;
const auto& p1 = points[i];
const auto& p2 = points[j];
auto d = (p2 - p1).normalize();
d *= (thickness * 0.5f);
std::swap(d.x, d.y);
d.x = -d.x;
const auto col = cols[i];
write_vtx(p1 + d, uv, col);
write_vtx(p2 + d, uv, col);
write_vtx(p2 - d, uv, col);
write_vtx(p1 - d, uv, col);
write_idx(cur_idx);
write_idx(cur_idx + 1);
write_idx(cur_idx + 2);
write_idx(cur_idx);
write_idx(cur_idx + 2);
write_idx(cur_idx + 3);
cur_idx += 4;
}
}
}
void draw_buffer::poly_fill(position* points, const uint32_t count, const pack_color* col)
{
const auto uv = manager->fonts->tex_uv_white_pixel;
const auto idx_count = (count - 2) * 3;
reserve_primitives(idx_count, count);
for (auto i = 0u; i < count; i++)
write_vtx(points[i], uv, col[i]);
for (auto i = 2u; i < count; i++)
{
write_idx(cur_idx);
write_idx(cur_idx + i - 1);
write_idx(cur_idx + i);
}
cur_idx += count;
}
void draw_buffer::poly_fill(position* points, const uint32_t count, const pack_color col)
{
const auto uv = manager->fonts->tex_uv_white_pixel;
const auto idx_count = (count - 2) * 3;
reserve_primitives(idx_count, count);
for (auto i = 0u; i < count; i++)
write_vtx(points[i], uv, col);
for (auto i = 2u; i < count; i++)
{
write_idx(cur_idx);
write_idx(cur_idx + i - 1);
write_idx(cur_idx + i);
}
cur_idx += count;
}
void draw_buffer::prim_reserve(uint32_t idx_count, uint32_t vtx_count)
{
reserve_primitives(idx_count, vtx_count);
}
void draw_buffer::prim_rect(const position& a, const position& c, const pack_color col)
{
position b{ c.x, a.y }, d{ a.x, c.y }, uv{ 1.f, 1.f };
auto idx = cur_idx;
idx_write_ptr[0] = idx;
idx_write_ptr[1] = (idx + 1);
idx_write_ptr[2] = (idx + 2);
idx_write_ptr[3] = idx;
idx_write_ptr[4] = (idx + 2);
idx_write_ptr[5] = (idx + 3);
vtx_write_ptr[0].pos = a;
vtx_write_ptr[0].uv = uv;
vtx_write_ptr[0].col = col;
vtx_write_ptr[1].pos = b;
vtx_write_ptr[1].uv = uv;
vtx_write_ptr[1].col = col;
vtx_write_ptr[2].pos = c;
vtx_write_ptr[2].uv = uv;
vtx_write_ptr[2].col = col;
vtx_write_ptr[3].pos = d;
vtx_write_ptr[3].uv = uv;
vtx_write_ptr[3].col = col;
vtx_write_ptr += 4;
cur_idx += 4;
idx_write_ptr += 6;
}
void draw_buffer::prim_rect_uv(const position& a,
const position& c,
const position& uv_a,
const position& uv_c,
const pack_color col)
{
const position b{ c.x, a.y }, d{ a.x, c.y }, uv_b{ uv_c.x, uv_a.y }, uv_d{ uv_a.x, uv_c.y };
const auto idx = cur_idx;
idx_write_ptr[0] = idx;
idx_write_ptr[1] = (idx + 1);
idx_write_ptr[2] = (idx + 2);
idx_write_ptr[3] = idx;
idx_write_ptr[4] = (idx + 2);
idx_write_ptr[5] = (idx + 3);
vtx_write_ptr[0].pos = a;
vtx_write_ptr[0].uv = uv_a;
vtx_write_ptr[0].col = col;
vtx_write_ptr[1].pos = b;
vtx_write_ptr[1].uv = uv_b;
vtx_write_ptr[1].col = col;
vtx_write_ptr[2].pos = c;
vtx_write_ptr[2].uv = uv_c;
vtx_write_ptr[2].col = col;
vtx_write_ptr[3].pos = d;
vtx_write_ptr[3].uv = uv_d;
vtx_write_ptr[3].col = col;
vtx_write_ptr += 4;
cur_idx += 4;
idx_write_ptr += 6;
}
void draw_buffer::prim_quad_uv(const position& tl,
const position& tr,
const position& bl,
const position& br,
const position& uv1,
const position& uv2,
const position& uv3,
const position& uv4,
const pack_color col)
{
const auto idx = cur_idx;
idx_write_ptr[0] = idx;
idx_write_ptr[1] = (idx + 1);
idx_write_ptr[2] = (idx + 2);
idx_write_ptr[3] = (idx + 1);
idx_write_ptr[4] = (idx + 3);
idx_write_ptr[5] = (idx + 2);
vtx_write_ptr[0].pos = tl;
vtx_write_ptr[0].uv = uv1;
vtx_write_ptr[0].col = col;
vtx_write_ptr[1].pos = tr;
vtx_write_ptr[1].uv = uv2;
vtx_write_ptr[1].col = col;
vtx_write_ptr[2].pos = bl;
vtx_write_ptr[2].uv = uv3;
vtx_write_ptr[2].col = col;
vtx_write_ptr[3].pos = br;
vtx_write_ptr[3].uv = uv4;
vtx_write_ptr[3].col = col;
vtx_write_ptr += 4;
cur_idx += 4;
idx_write_ptr += 6;
}
void draw_buffer::text(font* font,
const char* text,
const position& top_left,
const pack_color col,
const bool outline,
const position& bot_right)
{
if (col.a() == 0)
return;
if (font != nullptr)
push_font(font);
assert(cur_font);
auto clip_rect = cur_clip_rect();
if (bot_right.x != -1.f && bot_right.y != -1.f)
{
clip_rect.z = bot_right.x;
clip_rect.w = bot_right.y;
}
if (outline)
{
const auto col_out = color{ 0, 0, 0 };
auto copy_clip = clip_rect;
copy_clip.xy = top_left;
copy_clip.x -= 1.f;
copy_clip.z -= 1.f;
this->text(nullptr, text, copy_clip.xy, col_out, false, copy_clip.zw);
copy_clip.x += 2.f;
copy_clip.z += 2.f;
if (copy_clip.z < 0)
copy_clip.z = std::numeric_limits<float>::max();
this->text(nullptr, text, copy_clip.xy, col_out, false, copy_clip.zw);
copy_clip.x -= 1.f,
copy_clip.z -= 1.f;
copy_clip.y -= 1.f;
copy_clip.w -= 1.f;
this->text(nullptr, text, copy_clip.xy, col_out, false, copy_clip.zw);
copy_clip.y += 2.f;
copy_clip.w += 2.f;
if (copy_clip.w < 0)
copy_clip.w = std::numeric_limits<float>::max();
this->text(nullptr, text, copy_clip.xy, col_out, false, copy_clip.zw);
}
cur_font->render_text(this, cur_font->font_size, top_left, col, clip_rect, text, text + strlen(text));
if (font != nullptr)
pop_font();
}
void draw_buffer::text(font* font,
float target_size,
const char* text,
const position& top_left,
const pack_color col,
bool outline,
const position& bot_right)
{
if (col.a() == 0)
return;
if (font != nullptr)
push_font(font);
assert(cur_font);
auto clip_rect = cur_clip_rect();
if (bot_right.x != -1.f && bot_right.y != -1.f)
{