From 8138cc9a269844b6c0a84c193a7a43aec7010592 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Wed, 17 May 2023 17:06:16 +0200
Subject: wip vobj

---
 shaders/lightmap.cpp  | 20 ++++++++++++++++++++
 shaders/lightmap.frag | 18 ++++++++++++++++++
 shaders/lightmap.hpp  | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 shaders/lightmap.vert |  0
 4 files changed, 87 insertions(+)
 create mode 100644 shaders/lightmap.cpp
 create mode 100644 shaders/lightmap.frag
 create mode 100644 shaders/lightmap.hpp
 create mode 100644 shaders/lightmap.vert

(limited to 'shaders')

diff --git a/shaders/lightmap.cpp b/shaders/lightmap.cpp
new file mode 100644
index 00000000..3575e424
--- /dev/null
+++ b/shaders/lightmap.cpp
@@ -0,0 +1,20 @@
+#include "lightmap.hpp"
+#include "src/local-coords.hpp"
+
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wfloat-equal"
+#endif
+
+namespace floormat {
+
+lightmap_shader::~lightmap_shader() = default;
+bool lightmap_shader::light_s::operator==(const light_s&) const noexcept = default;
+
+static constexpr Vector2 output_size = TILE_MAX_DIM * TILE_SIZE2 * 3;
+
+lightmap_shader::lightmap_shader()
+{
+
+}
+
+} // namespace floormat
diff --git a/shaders/lightmap.frag b/shaders/lightmap.frag
new file mode 100644
index 00000000..2179160c
--- /dev/null
+++ b/shaders/lightmap.frag
@@ -0,0 +1,18 @@
+precision mediump float;
+
+struct light_u
+{
+    vec4 color_and_intensity;
+    vec2 center;
+    uint mode;
+};
+
+#define TILE_MAX_DIM 16
+#define TILE_SIZE_X 64
+#define TILE_SIZE_Y 64
+
+#define CHUNK_SIZE_X (TILE_SIZE_X * TILE_MAX_DIM)
+#define CHUNK_SIZE_Y (TILE_SIZE_Y * TILE_MAX_DIM)
+
+layout (location = 0) uniform vec4 color_intensity;
+layout (location = 1) uniform vec2 px;
diff --git a/shaders/lightmap.hpp b/shaders/lightmap.hpp
new file mode 100644
index 00000000..a2d566e6
--- /dev/null
+++ b/shaders/lightmap.hpp
@@ -0,0 +1,49 @@
+#pragma once
+
+#include "light-falloff.hpp"
+#include <Magnum/GL/AbstractShaderProgram.h>
+#include <Magnum/Math/Vector2.h>
+#include <Magnum/Math/Vector3.h>
+#include <Magnum/Math/Vector4.h>
+#include <Magnum/Math/Color.h>
+
+namespace floormat {
+
+struct local_coords;
+
+struct lightmap_shader final : GL::AbstractShaderProgram
+{
+    using Position = GL::Attribute<0, Vector2>;
+
+    explicit lightmap_shader();
+    ~lightmap_shader() override;
+
+    void set_light(Vector2i neighbor_offset, local_coords pos, Vector2b offset);
+    struct light light() const; // is a reader accessor needed?
+
+private:
+    static Vector2i get_px_pos(Vector2i neighbor_offset, local_coords pos, Vector2b offset);
+
+    struct light_u final
+    {
+        Vector4 color_and_intensity;
+        Vector2 center;
+        uint32_t mode;
+    };
+
+    struct light_s final
+    {
+        float intensity = 1;
+        Color3ub color {255, 255, 255};
+        Vector2i center;
+        light_falloff falloff;
+
+        bool operator==(const light_s&) const noexcept;
+    };
+
+    enum { ColorUniform = 0, CenterUniform = 1, FalloffUniform = 2, DepthUniform = 3, };
+
+    light_s _light;
+};
+
+} // namespace floormat
diff --git a/shaders/lightmap.vert b/shaders/lightmap.vert
new file mode 100644
index 00000000..e69de29b
-- 
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