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#include "shaders/tile.hpp"
#include "loader.hpp"
#include "compat/assert.hpp"
#include <Magnum/Math/Vector4.h>
#include <Magnum/GL/Context.h>
#include <Magnum/GL/Shader.h>
#include <Magnum/GL/Version.h>
namespace floormat {
tile_shader::tile_shader()
{
using V = GL::Version;
constexpr V min_version = GL::Version::GL430;
const auto version = GL::Context::current().supportedVersion({ V::GL460, V::GL450, V::GL440, V::GL430, });
if (version < min_version)
fm_abort("floormat requires OpenGL version %d, only %d is supported", (int)min_version, (int)version);
GL::Shader vert{version, GL::Shader::Type::Vertex};
GL::Shader frag{version, GL::Shader::Type::Fragment};
vert.addSource(loader.shader("shaders/tile.vert"));
frag.addSource(loader.shader("shaders/tile.frag"));
CORRADE_INTERNAL_ASSERT_OUTPUT(vert.compile());
CORRADE_INTERNAL_ASSERT_OUTPUT(frag.compile());
attachShaders({vert, frag});
CORRADE_INTERNAL_ASSERT_OUTPUT(link());
set_scale({640, 480});
set_camera_offset({0, 0});
set_tint({1, 1, 1, 1});
}
tile_shader::~tile_shader() = default;
tile_shader& tile_shader::set_scale(const Vector2& scale)
{
if (scale != _scale)
setUniform(ScaleUniform, 1.f/(_scale = scale));
return *this;
}
tile_shader& tile_shader::set_camera_offset(Vector2d camera_offset)
{
_camera_offset = camera_offset;
return *this;
}
tile_shader& tile_shader::set_tint(const Vector4& tint)
{
if (tint != _tint)
setUniform(TintUniform, _tint = tint);
return *this;
}
void tile_shader::_draw()
{
if (const auto offset = Vector2{(float)_camera_offset[0], (float)_camera_offset[1]};
offset != _real_camera_offset)
{
fm_assert(offset[0] < 1 << 24 && offset[1] < 1 << 24);
_real_camera_offset = offset;
setUniform(OffsetUniform, offset);
}
}
} // namespace floormat
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