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Add triangle painting to ui::painter

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This commit is contained in:
Nikita Lisitsa 2021-03-05 23:13:27 +03:00
parent d9fb3b1be6
commit fec050307d
3 changed files with 17 additions and 0 deletions
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2
libs/ui/include/psemek/ui/painter.hpp
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@ -4,6 +4,7 @@
#include <psemek/gfx/color.hpp>
#include <psemek/gfx/texture.hpp>
#include <psemek/geom/box.hpp>
#include <psemek/geom/simplex.hpp>
namespace psemek::ui
{
@ -11,6 +12,7 @@ namespace psemek::ui
struct painter
{
virtual void draw_rect(geom::box<float, 2> const & rect, gfx::color_rgba const & color) = 0;
virtual void draw_triangle(geom::triangle<geom::point<float, 2>> const & tri, gfx::color_rgba const & color) = 0;
virtual void draw_glyph(font const & f, char32_t c, geom::box<float, 2> const & rect, gfx::color_rgba const & color) = 0;
virtual void draw_image(geom::box<float, 2> const & rect, gfx::texture_2d const & tex, gfx::color_rgba const & color = {0, 0, 0, 0}) = 0;
virtual void draw_subimage(geom::box<float, 2> const & rect, gfx::texture_2d const & tex, geom::box<float, 2> const & part, gfx::color_rgba const & color = {0, 0, 0, 0}) = 0;

1
libs/ui/include/psemek/ui/painter_impl.hpp
View file

@ -16,6 +16,7 @@ namespace psemek::ui
~painter_impl();
void draw_rect(geom::box<float, 2> const & rect, gfx::color_rgba const & color) override;
void draw_triangle(geom::triangle<geom::point<float, 2>> const & tri, gfx::color_rgba const & color) override;
void draw_glyph(font const & f, char32_t c, geom::box<float, 2> const & rect, gfx::color_rgba const & color) override;
void draw_image(geom::box<float, 2> const & rect, gfx::texture_2d const & tex, gfx::color_rgba const & color) override;
void draw_subimage(geom::box<float, 2> const & rect, gfx::texture_2d const & tex, geom::box<float, 2> const & part, gfx::color_rgba const & color = {0, 0, 0, 0}) override;

14
libs/ui/source/painter_impl.cpp
View file

@ -249,6 +249,20 @@ void main()
batch.indices.insert(batch.indices.end(), {base + 0, base + 1, base + 2, base + 2, base + 1, base + 3});
}
void painter_impl::draw_triangle(geom::triangle<geom::point<float, 2>> const & tri, gfx::color_rgba const & color)
{
auto & batch = impl().batch<colored_batch>({});
std::uint32_t const depth = impl().depth++;
std::uint32_t const base = batch.vertices.size();
batch.vertices.push_back({tri[0], depth, color});
batch.vertices.push_back({tri[1], depth, color});
batch.vertices.push_back({tri[2], depth, color});
batch.indices.insert(batch.indices.end(), {base + 0, base + 1, base + 2});
}
void painter_impl::draw_glyph(font const & f, char32_t c, geom::box<float, 2> const & rect, gfx::color_rgba const & color)
{
auto tbox = f.texcoords(c);