Initial commit

10 files changed, 1415 insertions, 0 deletions

diff --git a/src/draw/animation.odin b/src/draw/animation.odin
new file mode 100644
index 0000000..ac947fb
--- /dev/null
+++ b/src/draw/animation.odin
@@ -0,0 +1,84 @@
+package draw
+
+import "core:encoding/json"
+import "core:fmt"
+import "core:os"
+import "core:path/filepath"
+import "core:strings"
+
+FrameRect :: struct {
+  x: i32 `json:"x"`,
+  y: i32 `json:"y"`,
+  w: i32 `json:"w"`,
+  h: i32 `json:"h"`,
+}
+
+Frame :: struct {
+  rect: FrameRect `json:"frame"`,
+  duration: i32 `json:"duration"`,
+}
+
+Tag :: struct {
+  name: string `json:"name"`,
+  from: i32 `json:"from"`,
+  to: i32 `json:"to"`,
+  direction: string `json:"direction"`,
+}
+
+AnimationMeta :: struct {
+  image_path: string `json:"image"`,
+  frame_tags: []Tag `json:"frameTags"`,
+  frame_tags_indices: map[string]u32,
+}
+
+Animation :: struct {
+  frames: []Frame `json:"frames"`,
+  using meta: AnimationMeta `json:"meta"`,
+}
+
+@(require_results)
+init_anim_data :: proc(anim: ^Animation, path: string) -> bool {
+  data, ok := os.read_entire_file(path)
+  if !ok {
+    return false
+  }
+  defer delete(data)
+
+  json_err := json.unmarshal(data, anim)
+  if json_err != nil {
+    fmt.println("could not unmarshal data")
+    return false
+  }
+
+  for tag, i in anim.frame_tags {
+    anim.frame_tags_indices[tag.name] = u32(i)
+  }
+
+  partial_img_path := anim.image_path
+  defer delete(partial_img_path)
+  anim_dir := filepath.dir(path)
+  defer delete(anim_dir)
+
+  anim.image_path = strings.concatenate({anim_dir, "/", partial_img_path})
+
+  return true
+}
+
+delete_anim_data :: proc(anim: Animation) {
+  delete(anim.frames)
+
+  for tag in anim.frame_tags {
+    delete(tag.name)
+    delete(tag.direction)
+  }
+
+  // sg.destroy_image(anim.image)
+
+  delete(anim.frame_tags)
+  delete(anim.frame_tags_indices)
+  delete(anim.image_path)
+}
+
+get_anim_tag :: proc(anim: Animation, tag_name: string) -> Tag {
+  return anim.frame_tags[anim.frame_tags_indices[tag_name]]
+}
diff --git a/src/draw/default.glsl b/src/draw/default.glsl
new file mode 100644
index 0000000..b45a1c9
--- /dev/null
+++ b/src/draw/default.glsl
@@ -0,0 +1,38 @@
+@header package draw
+@header import sg "shared:sokol/gfx"
+
+@vs vs
+in vec2 vposition;
+in vec2 vuv;
+in vec4 vcolor;
+
+out vec4 fcolor;
+out vec2 fuv;
+
+layout (binding = 0) uniform default_vs_params {
+    mat4 projection;
+};
+
+void main() {
+    gl_Position = projection * vec4(vposition, 0.0, 1.0);
+    fcolor = vcolor;
+    fuv = vuv;
+}
+@end
+
+@fs fs
+in vec4 fcolor;
+in vec2 fuv;
+
+out vec4 out_color;
+
+layout (binding = 0) uniform texture2D tex;
+layout (binding = 0) uniform sampler tex_samp;
+#define tex sampler2D(tex, tex_samp)
+
+void main() {
+    out_color = texture(tex, fuv) * fcolor;
+}
+@end
+
+@program default vs fs
diff --git a/src/draw/default_shader.odin b/src/draw/default_shader.odin
new file mode 100644
index 0000000..eca5c62
--- /dev/null
+++ b/src/draw/default_shader.odin
@@ -0,0 +1,538 @@
+package draw
+import sg "shared:sokol/gfx"
+/*
+    #version:1# (machine generated, don't edit!)
+
+    Generated by sokol-shdc (https://github.com/floooh/sokol-tools)
+
+    Cmdline:
+        sokol-shdc -i src/draw/default.glsl -o src/draw/default_shader.odin -l glsl430:metal_macos:hlsl5 -f sokol_odin
+
+    Overview:
+    =========
+    Shader program: 'default':
+        Get shader desc: default_shader_desc(sg.query_backend())
+        Vertex Shader: vs
+        Fragment Shader: fs
+        Attributes:
+            ATTR_default_vposition => 0
+            ATTR_default_vuv => 1
+            ATTR_default_vcolor => 2
+    Bindings:
+        Uniform block 'default_vs_params':
+            Odin struct: Default_Vs_Params
+            Bind slot: UB_default_vs_params => 0
+        Texture 'tex':
+            Image type: ._2D
+            Sample type: .FLOAT
+            Multisampled: false
+            Bind slot: VIEW_tex => 0
+        Sampler 'tex_samp':
+            Type: .FILTERING
+            Bind slot: SMP_tex_samp => 0
+*/
+ATTR_default_vposition :: 0
+ATTR_default_vuv :: 1
+ATTR_default_vcolor :: 2
+UB_default_vs_params :: 0
+VIEW_tex :: 0
+SMP_tex_samp :: 0
+Default_Vs_Params :: struct #align(16) {
+    using _: struct #packed {
+        projection: [16]f32,
+    },
+}
+/*
+    #version 430
+
+    uniform vec4 default_vs_params[4];
+    layout(location = 0) in vec2 vposition;
+    layout(location = 0) out vec4 fcolor;
+    layout(location = 2) in vec4 vcolor;
+    layout(location = 1) out vec2 fuv;
+    layout(location = 1) in vec2 vuv;
+
+    void main()
+    {
+        gl_Position = mat4(default_vs_params[0], default_vs_params[1], default_vs_params[2], default_vs_params[3]) * vec4(vposition, 0.0, 1.0);
+        fcolor = vcolor;
+        fuv = vuv;
+    }
+
+*/
+@(private="file")
+vs_source_glsl430 := [428]u8 {
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+}
+/*
+    #version 430
+
+    layout(binding = 0) uniform sampler2D tex_tex_samp;
+
+    layout(location = 0) out vec4 out_color;
+    layout(location = 1) in vec2 fuv;
+    layout(location = 0) in vec4 fcolor;
+
+    void main()
+    {
+        out_color = texture(tex_tex_samp, fuv) * fcolor;
+    }
+
+*/
+@(private="file")
+fs_source_glsl430 := [251]u8 {
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+}
+/*
+    cbuffer default_vs_params : register(b0)
+    {
+        row_major float4x4 _19_projection : packoffset(c0);
+    };
+
+
+    static float4 gl_Position;
+    static float2 vposition;
+    static float4 fcolor;
+    static float4 vcolor;
+    static float2 fuv;
+    static float2 vuv;
+
+    struct SPIRV_Cross_Input
+    {
+        float2 vposition : TEXCOORD0;
+        float2 vuv : TEXCOORD1;
+        float4 vcolor : TEXCOORD2;
+    };
+
+    struct SPIRV_Cross_Output
+    {
+        float4 fcolor : TEXCOORD0;
+        float2 fuv : TEXCOORD1;
+        float4 gl_Position : SV_Position;
+    };
+
+    void vert_main()
+    {
+        gl_Position = mul(float4(vposition, 0.0f, 1.0f), _19_projection);
+        fcolor = vcolor;
+        fuv = vuv;
+    }
+
+    SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
+    {
+        vposition = stage_input.vposition;
+        vcolor = stage_input.vcolor;
+        vuv = stage_input.vuv;
+        vert_main();
+        SPIRV_Cross_Output stage_output;
+        stage_output.gl_Position = gl_Position;
+        stage_output.fcolor = fcolor;
+        stage_output.fuv = fuv;
+        return stage_output;
+    }
+*/
+@(private="file")
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+}
+/*
+    Texture2D<float4> tex : register(t0);
+    SamplerState tex_samp : register(s0);
+
+    static float4 out_color;
+    static float2 fuv;
+    static float4 fcolor;
+
+    struct SPIRV_Cross_Input
+    {
+        float4 fcolor : TEXCOORD0;
+        float2 fuv : TEXCOORD1;
+    };
+
+    struct SPIRV_Cross_Output
+    {
+        float4 out_color : SV_Target0;
+    };
+
+    void frag_main()
+    {
+        out_color = tex.Sample(tex_samp, fuv) * fcolor;
+    }
+
+    SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
+    {
+        fuv = stage_input.fuv;
+        fcolor = stage_input.fcolor;
+        frag_main();
+        SPIRV_Cross_Output stage_output;
+        stage_output.out_color = out_color;
+        return stage_output;
+    }
+*/
+@(private="file")
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+}
+/*
+    #include <metal_stdlib>
+    #include <simd/simd.h>
+
+    using namespace metal;
+
+    struct default_vs_params
+    {
+        float4x4 projection;
+    };
+
+    struct main0_out
+    {
+        float4 fcolor [[user(locn0)]];
+        float2 fuv [[user(locn1)]];
+        float4 gl_Position [[position]];
+    };
+
+    struct main0_in
+    {
+        float2 vposition [[attribute(0)]];
+        float2 vuv [[attribute(1)]];
+        float4 vcolor [[attribute(2)]];
+    };
+
+    vertex main0_out main0(main0_in in [[stage_in]], constant default_vs_params& _19 [[buffer(0)]])
+    {
+        main0_out out = {};
+        out.gl_Position = _19.projection * float4(in.vposition, 0.0, 1.0);
+        out.fcolor = in.vcolor;
+        out.fuv = in.vuv;
+        return out;
+    }
+
+*/
+@(private="file")
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+    0x75,0x74,0x2e,0x67,0x6c,0x5f,0x50,0x6f,0x73,0x69,0x74,0x69,0x6f,0x6e,0x20,0x3d,
+    0x20,0x5f,0x31,0x39,0x2e,0x70,0x72,0x6f,0x6a,0x65,0x63,0x74,0x69,0x6f,0x6e,0x20,
+    0x2a,0x20,0x66,0x6c,0x6f,0x61,0x74,0x34,0x28,0x69,0x6e,0x2e,0x76,0x70,0x6f,0x73,
+    0x69,0x74,0x69,0x6f,0x6e,0x2c,0x20,0x30,0x2e,0x30,0x2c,0x20,0x31,0x2e,0x30,0x29,
+    0x3b,0x0a,0x20,0x20,0x20,0x20,0x6f,0x75,0x74,0x2e,0x66,0x63,0x6f,0x6c,0x6f,0x72,
+    0x20,0x3d,0x20,0x69,0x6e,0x2e,0x76,0x63,0x6f,0x6c,0x6f,0x72,0x3b,0x0a,0x20,0x20,
+    0x20,0x20,0x6f,0x75,0x74,0x2e,0x66,0x75,0x76,0x20,0x3d,0x20,0x69,0x6e,0x2e,0x76,
+    0x75,0x76,0x3b,0x0a,0x20,0x20,0x20,0x20,0x72,0x65,0x74,0x75,0x72,0x6e,0x20,0x6f,
+    0x75,0x74,0x3b,0x0a,0x7d,0x0a,0x0a,0x00,
+}
+/*
+    #include <metal_stdlib>
+    #include <simd/simd.h>
+
+    using namespace metal;
+
+    struct main0_out
+    {
+        float4 out_color [[color(0)]];
+    };
+
+    struct main0_in
+    {
+        float4 fcolor [[user(locn0)]];
+        float2 fuv [[user(locn1)]];
+    };
+
+    fragment main0_out main0(main0_in in [[stage_in]], texture2d<float> tex [[texture(0)]], sampler tex_samp [[sampler(0)]])
+    {
+        main0_out out = {};
+        out.out_color = tex.sample(tex_samp, in.fuv) * in.fcolor;
+        return out;
+    }
+
+*/
+@(private="file")
+fs_source_metal_macos := [448]u8 {
+    0x23,0x69,0x6e,0x63,0x6c,0x75,0x64,0x65,0x20,0x3c,0x6d,0x65,0x74,0x61,0x6c,0x5f,
+    0x73,0x74,0x64,0x6c,0x69,0x62,0x3e,0x0a,0x23,0x69,0x6e,0x63,0x6c,0x75,0x64,0x65,
+    0x20,0x3c,0x73,0x69,0x6d,0x64,0x2f,0x73,0x69,0x6d,0x64,0x2e,0x68,0x3e,0x0a,0x0a,
+    0x75,0x73,0x69,0x6e,0x67,0x20,0x6e,0x61,0x6d,0x65,0x73,0x70,0x61,0x63,0x65,0x20,
+    0x6d,0x65,0x74,0x61,0x6c,0x3b,0x0a,0x0a,0x73,0x74,0x72,0x75,0x63,0x74,0x20,0x6d,
+    0x61,0x69,0x6e,0x30,0x5f,0x6f,0x75,0x74,0x0a,0x7b,0x0a,0x20,0x20,0x20,0x20,0x66,
+    0x6c,0x6f,0x61,0x74,0x34,0x20,0x6f,0x75,0x74,0x5f,0x63,0x6f,0x6c,0x6f,0x72,0x20,
+    0x5b,0x5b,0x63,0x6f,0x6c,0x6f,0x72,0x28,0x30,0x29,0x5d,0x5d,0x3b,0x0a,0x7d,0x3b,
+    0x0a,0x0a,0x73,0x74,0x72,0x75,0x63,0x74,0x20,0x6d,0x61,0x69,0x6e,0x30,0x5f,0x69,
+    0x6e,0x0a,0x7b,0x0a,0x20,0x20,0x20,0x20,0x66,0x6c,0x6f,0x61,0x74,0x34,0x20,0x66,
+    0x63,0x6f,0x6c,0x6f,0x72,0x20,0x5b,0x5b,0x75,0x73,0x65,0x72,0x28,0x6c,0x6f,0x63,
+    0x6e,0x30,0x29,0x5d,0x5d,0x3b,0x0a,0x20,0x20,0x20,0x20,0x66,0x6c,0x6f,0x61,0x74,
+    0x32,0x20,0x66,0x75,0x76,0x20,0x5b,0x5b,0x75,0x73,0x65,0x72,0x28,0x6c,0x6f,0x63,
+    0x6e,0x31,0x29,0x5d,0x5d,0x3b,0x0a,0x7d,0x3b,0x0a,0x0a,0x66,0x72,0x61,0x67,0x6d,
+    0x65,0x6e,0x74,0x20,0x6d,0x61,0x69,0x6e,0x30,0x5f,0x6f,0x75,0x74,0x20,0x6d,0x61,
+    0x69,0x6e,0x30,0x28,0x6d,0x61,0x69,0x6e,0x30,0x5f,0x69,0x6e,0x20,0x69,0x6e,0x20,
+    0x5b,0x5b,0x73,0x74,0x61,0x67,0x65,0x5f,0x69,0x6e,0x5d,0x5d,0x2c,0x20,0x74,0x65,
+    0x78,0x74,0x75,0x72,0x65,0x32,0x64,0x3c,0x66,0x6c,0x6f,0x61,0x74,0x3e,0x20,0x74,
+    0x65,0x78,0x20,0x5b,0x5b,0x74,0x65,0x78,0x74,0x75,0x72,0x65,0x28,0x30,0x29,0x5d,
+    0x5d,0x2c,0x20,0x73,0x61,0x6d,0x70,0x6c,0x65,0x72,0x20,0x74,0x65,0x78,0x5f,0x73,
+    0x61,0x6d,0x70,0x20,0x5b,0x5b,0x73,0x61,0x6d,0x70,0x6c,0x65,0x72,0x28,0x30,0x29,
+    0x5d,0x5d,0x29,0x0a,0x7b,0x0a,0x20,0x20,0x20,0x20,0x6d,0x61,0x69,0x6e,0x30,0x5f,
+    0x6f,0x75,0x74,0x20,0x6f,0x75,0x74,0x20,0x3d,0x20,0x7b,0x7d,0x3b,0x0a,0x20,0x20,
+    0x20,0x20,0x6f,0x75,0x74,0x2e,0x6f,0x75,0x74,0x5f,0x63,0x6f,0x6c,0x6f,0x72,0x20,
+    0x3d,0x20,0x74,0x65,0x78,0x2e,0x73,0x61,0x6d,0x70,0x6c,0x65,0x28,0x74,0x65,0x78,
+    0x5f,0x73,0x61,0x6d,0x70,0x2c,0x20,0x69,0x6e,0x2e,0x66,0x75,0x76,0x29,0x20,0x2a,
+    0x20,0x69,0x6e,0x2e,0x66,0x63,0x6f,0x6c,0x6f,0x72,0x3b,0x0a,0x20,0x20,0x20,0x20,
+    0x72,0x65,0x74,0x75,0x72,0x6e,0x20,0x6f,0x75,0x74,0x3b,0x0a,0x7d,0x0a,0x0a,0x00,
+
+}
+default_shader_desc :: proc (backend: sg.Backend) -> sg.Shader_Desc {
+    desc: sg.Shader_Desc
+    desc.label = "default_shader"
+    #partial switch backend {
+    case .GLCORE:
+        desc.vertex_func.source = transmute(cstring)&vs_source_glsl430
+        desc.vertex_func.entry = "main"
+        desc.fragment_func.source = transmute(cstring)&fs_source_glsl430
+        desc.fragment_func.entry = "main"
+        desc.attrs[0].base_type = .FLOAT
+        desc.attrs[0].glsl_name = "vposition"
+        desc.attrs[1].base_type = .FLOAT
+        desc.attrs[1].glsl_name = "vuv"
+        desc.attrs[2].base_type = .FLOAT
+        desc.attrs[2].glsl_name = "vcolor"
+        desc.uniform_blocks[0].stage = .VERTEX
+        desc.uniform_blocks[0].layout = .STD140
+        desc.uniform_blocks[0].size = 64
+        desc.uniform_blocks[0].glsl_uniforms[0].type = .FLOAT4
+        desc.uniform_blocks[0].glsl_uniforms[0].array_count = 4
+        desc.uniform_blocks[0].glsl_uniforms[0].glsl_name = "default_vs_params"
+        desc.views[0].texture.stage = .FRAGMENT
+        desc.views[0].texture.image_type = ._2D
+        desc.views[0].texture.sample_type = .FLOAT
+        desc.views[0].texture.multisampled = false
+        desc.samplers[0].stage = .FRAGMENT
+        desc.samplers[0].sampler_type = .FILTERING
+        desc.texture_sampler_pairs[0].stage = .FRAGMENT
+        desc.texture_sampler_pairs[0].view_slot = 0
+        desc.texture_sampler_pairs[0].sampler_slot = 0
+        desc.texture_sampler_pairs[0].glsl_name = "tex_tex_samp"
+    case .D3D11:
+        desc.vertex_func.source = transmute(cstring)&vs_source_hlsl5
+        desc.vertex_func.d3d11_target = "vs_5_0"
+        desc.vertex_func.entry = "main"
+        desc.fragment_func.source = transmute(cstring)&fs_source_hlsl5
+        desc.fragment_func.d3d11_target = "ps_5_0"
+        desc.fragment_func.entry = "main"
+        desc.attrs[0].base_type = .FLOAT
+        desc.attrs[0].hlsl_sem_name = "TEXCOORD"
+        desc.attrs[0].hlsl_sem_index = 0
+        desc.attrs[1].base_type = .FLOAT
+        desc.attrs[1].hlsl_sem_name = "TEXCOORD"
+        desc.attrs[1].hlsl_sem_index = 1
+        desc.attrs[2].base_type = .FLOAT
+        desc.attrs[2].hlsl_sem_name = "TEXCOORD"
+        desc.attrs[2].hlsl_sem_index = 2
+        desc.uniform_blocks[0].stage = .VERTEX
+        desc.uniform_blocks[0].layout = .STD140
+        desc.uniform_blocks[0].size = 64
+        desc.uniform_blocks[0].hlsl_register_b_n = 0
+        desc.views[0].texture.stage = .FRAGMENT
+        desc.views[0].texture.image_type = ._2D
+        desc.views[0].texture.sample_type = .FLOAT
+        desc.views[0].texture.multisampled = false
+        desc.views[0].texture.hlsl_register_t_n = 0
+        desc.samplers[0].stage = .FRAGMENT
+        desc.samplers[0].sampler_type = .FILTERING
+        desc.samplers[0].hlsl_register_s_n = 0
+        desc.texture_sampler_pairs[0].stage = .FRAGMENT
+        desc.texture_sampler_pairs[0].view_slot = 0
+        desc.texture_sampler_pairs[0].sampler_slot = 0
+    case .METAL_MACOS:
+        desc.vertex_func.source = transmute(cstring)&vs_source_metal_macos
+        desc.vertex_func.entry = "main0"
+        desc.fragment_func.source = transmute(cstring)&fs_source_metal_macos
+        desc.fragment_func.entry = "main0"
+        desc.attrs[0].base_type = .FLOAT
+        desc.attrs[1].base_type = .FLOAT
+        desc.attrs[2].base_type = .FLOAT
+        desc.uniform_blocks[0].stage = .VERTEX
+        desc.uniform_blocks[0].layout = .STD140
+        desc.uniform_blocks[0].size = 64
+        desc.uniform_blocks[0].msl_buffer_n = 0
+        desc.views[0].texture.stage = .FRAGMENT
+        desc.views[0].texture.image_type = ._2D
+        desc.views[0].texture.sample_type = .FLOAT
+        desc.views[0].texture.multisampled = false
+        desc.views[0].texture.msl_texture_n = 0
+        desc.samplers[0].stage = .FRAGMENT
+        desc.samplers[0].sampler_type = .FILTERING
+        desc.samplers[0].msl_sampler_n = 0
+        desc.texture_sampler_pairs[0].stage = .FRAGMENT
+        desc.texture_sampler_pairs[0].view_slot = 0
+        desc.texture_sampler_pairs[0].sampler_slot = 0
+    }
+    return desc
+}
diff --git a/src/draw/draw.odin b/src/draw/draw.odin
new file mode 100644
index 0000000..2e7eaaf
--- /dev/null
+++ b/src/draw/draw.odin
@@ -0,0 +1,284 @@
+package draw
+
+import "core:fmt"
+import "core:math/linalg"
+import "core:math"
+
+import sg "shared:sokol/gfx"
+import sapp "shared:sokol/app"
+import sglue "shared:sokol/glue"
+
+Vec2 :: [2]f32
+Vec3 :: [3]f32
+Mat4 :: matrix[4, 4]f32
+
+Rect :: struct {
+  start: Vec2,
+  size: Vec2,
+}
+
+Color :: [4]f32
+
+SCREEN_WIDTH :: 256
+SCREEN_HEIGHT :: 256
+
+Renderer :: struct {
+  screen: struct {
+    framebuffer: Framebuffer,
+    vertex_buffer: sg.Buffer,
+  },
+  display: struct {
+    pass_action: sg.Pass_Action,
+    pipe: sg.Pipeline,
+    binds: sg.Bindings,
+  },
+
+  view: sg.View,
+  sampler: sg.Sampler,
+
+  projection: Mat4,
+  current_batch: Batch,
+
+  tint: Color,
+}
+
+Vertex :: struct {
+  pos: Vec2,
+  uv: Vec2,
+  color: Color,
+}
+
+Batch :: struct {
+  img: sg.Image,
+  vertices: [dynamic]Vertex,
+}
+
+init :: proc(r: ^Renderer) {
+  r.display.pipe = sg.make_pipeline({
+    shader = sg.make_shader(default_shader_desc(sg.query_backend())),
+    layout = {
+      attrs = {
+        ATTR_default_vposition = {format = .FLOAT2},
+        ATTR_default_vuv = {format = .FLOAT2},
+        ATTR_default_vcolor = {format = .FLOAT4},
+      },
+    },
+  })
+
+  r.display.pass_action = {
+    colors = {
+      0 = {load_action = .CLEAR, clear_value = {0, 0, 0, 1}},
+    },
+  }
+
+  init_framebuffer(
+    &r.screen.framebuffer,
+    SCREEN_WIDTH, SCREEN_HEIGHT,
+    Color{0.2, 0.2, 0.2, 1.0},
+  )
+
+  r.screen.vertex_buffer = sg.make_buffer({
+    size = size_of(Vertex) * 6,
+    usage = {
+      vertex_buffer = true,
+      immutable = false,
+      stream_update = true,
+    },
+  })
+
+  r.view = sg.alloc_view()
+  r.sampler = sg.make_sampler({})
+
+  r.display.binds.vertex_buffers[0] = r.screen.vertex_buffer
+  r.display.binds.views[VIEW_tex] = r.screen.framebuffer.view
+  r.display.binds.samplers[SMP_tex_samp] = r.sampler
+
+  r.tint = {1, 1, 1, 1}
+}
+
+deinit :: proc(r: ^Renderer) {
+  delete_batch(&r.current_batch)
+
+  sg.destroy_pipeline(r.screen.framebuffer.pipe)
+  sg.destroy_pipeline(r.display.pipe)
+
+  sg.destroy_view(r.view)
+  sg.destroy_sampler(r.sampler)
+
+  sg.destroy_buffer(r.screen.vertex_buffer)
+  destroy_framebuffer(&r.screen.framebuffer)
+}
+
+new_frame :: proc(r: ^Renderer) {
+  framebuffer_draw_start(r.screen.framebuffer)
+  r.projection = linalg.matrix_ortho3d(
+    0, f32(SCREEN_WIDTH),
+    f32(SCREEN_HEIGHT), 0,
+    0.0, 1.0,
+  )
+}
+
+end_frame :: proc(r: ^Renderer) {
+  flush_current_batch(r)
+  clear(&r.current_batch.vertices)
+
+  framebuffer_draw_end(r.screen.framebuffer)
+
+  r.projection = linalg.matrix_ortho3d(
+    0, f32(sapp.width()),
+    0, f32(sapp.height()),
+    0.0, 1.0,
+  )
+
+  sg.begin_pass({action=r.display.pass_action, swapchain=sglue.swapchain()})
+  sg.apply_pipeline(r.display.pipe)
+
+  scale := math.min(
+    f32(sapp.height()) / f32(SCREEN_HEIGHT) ,
+    f32(sapp.width()) / f32(SCREEN_WIDTH),
+  )
+  screen_start := Vec2{
+    (f32(sapp.width()) - (SCREEN_WIDTH * scale)) / 2,
+    (f32(sapp.height()) - (SCREEN_HEIGHT * scale)) / 2,
+  }
+
+  draw_texture(
+    r,
+    r.screen.framebuffer.img,
+    screen_start,
+    scale = Vec2{scale, scale},
+  )
+
+  flush_current_batch(r)
+  clear(&r.current_batch.vertices)
+
+  sg.end_pass()
+
+  sg.commit()
+}
+
+@(private)
+delete_batch :: proc(batch: ^Batch) {
+  delete(batch.vertices)
+}
+
+flush_current_batch :: proc(r: ^Renderer) {
+  batch := r.current_batch
+
+  if len(batch.vertices) == 0 {
+    return
+  }
+
+  buffer := sg.make_buffer({
+    data = {
+      ptr = &r.current_batch.vertices[0],
+      size = size_of(Vertex) * len(r.current_batch.vertices),
+    },
+  })
+
+  sg.init_view(r.view, {
+    texture = {
+      image = r.current_batch.img,
+    },
+  })
+
+  binds: sg.Bindings
+
+  binds.vertex_buffers[0] = buffer
+  binds.views[VIEW_tex] = r.view
+  binds.samplers[SMP_tex_samp] = r.sampler
+
+  uniforms := Default_Vs_Params {
+    projection = transmute([16]f32)r.projection,
+  }
+
+  sg.apply_bindings(binds)
+  sg.apply_uniforms(UB_default_vs_params, {ptr=&uniforms, size=size_of(uniforms)})
+
+  sg.draw(0, len(r.current_batch.vertices), 1)
+
+  sg.uninit_view(r.view)
+
+  sg.destroy_buffer(buffer)
+}
+
+@(private)
+new_batch :: proc(batch: ^Batch, img: sg.Image) {
+  clear(&batch.vertices)   
+  batch.img = img
+}
+
+request_batch :: proc(r: ^Renderer, img: sg.Image) -> ^Batch { 
+  if len(r.current_batch.vertices) == 0 {
+    new_batch(&r.current_batch, img)
+  } else if img != r.current_batch.img {
+    flush_current_batch(r)
+    new_batch(&r.current_batch, img)
+  }
+
+  return &r.current_batch
+}
+
+@(private)
+batch_vertices :: proc(
+  b: ^Batch,
+  vertices: []Vertex,
+) {
+  append(&b.vertices, ..vertices)
+}
+
+draw_texture :: proc{
+  draw_texture_full,
+  draw_texture_quad,
+}
+
+draw_texture_quad :: proc(
+  r: ^Renderer,
+  img: sg.Image, 
+  quad: Rect,
+  pos: Vec2,
+  offset := Vec2{0, 0},
+  scale := Vec2{1, 1},
+) {
+  assert(quad.size.x > 0 && quad.size.y > 0)
+
+  batch := request_batch(r, img)
+
+  top_left := pos - (offset * scale)
+  bot_rght := top_left + quad.size * scale
+
+  size := Vec2{
+    f32(sg.query_image_width(img)),
+    f32(sg.query_image_height(img)),
+  }
+
+  uv_start := quad.start / size
+  uv_end := (quad.start + quad.size) / size
+
+  // |/|
+  vertices := [?]Vertex{
+    {top_left,                 uv_start,                 r.tint},
+    {{bot_rght.x, top_left.y}, {uv_end.x,   uv_start.y}, r.tint},
+    {{top_left.x, bot_rght.y}, {uv_start.x, uv_end.y  }, r.tint},
+
+    {{bot_rght.x, top_left.y}, {uv_end.x,   uv_start.y}, r.tint},
+    {{top_left.x, bot_rght.y}, {uv_start.x, uv_end.y  }, r.tint},
+    {bot_rght,                 uv_end,                   r.tint},
+  }
+
+  batch_vertices(batch, vertices[:])
+}
+
+draw_texture_full :: proc(
+  r: ^Renderer,
+  img: sg.Image, 
+  pos: Vec2,
+  offset := Vec2{0, 0},
+  scale := Vec2{1, 1},
+) {
+  size := Vec2{
+    f32(sg.query_image_width(img)),
+    f32(sg.query_image_height(img)),
+  }
+  draw_texture_quad(r, img, Rect{Vec2{0, 0}, size}, pos, offset, scale)
+}
diff --git a/src/draw/framebuffer.odin b/src/draw/framebuffer.odin
new file mode 100644
index 0000000..cd7848b
--- /dev/null
+++ b/src/draw/framebuffer.odin
@@ -0,0 +1,94 @@
+package draw
+
+import sg "shared:sokol/gfx"
+
+Framebuffer :: struct {
+  img: sg.Image,
+  view: sg.View,
+  pipe: sg.Pipeline,
+  pass: sg.Pass,
+}
+
+init_framebuffer :: proc(
+  fb: ^Framebuffer,
+  width: i32,
+  height: i32,
+  clear_color := Color{0, 0, 0, 0},
+) {
+  fb.pipe = sg.make_pipeline({
+    shader = sg.make_shader(default_shader_desc(sg.query_backend())),
+    layout = {
+      attrs = {
+        ATTR_default_vposition = {format = .FLOAT2},
+        ATTR_default_vuv = {format = .FLOAT2},
+        ATTR_default_vcolor = {format = .FLOAT4},
+      },
+    },
+    depth = {
+      pixel_format = .NONE,
+    },
+    sample_count = 1,
+    colors = {
+      0 = {
+        pixel_format = .RGBA8,
+        blend = {
+          enabled = true,
+          src_factor_rgb = .SRC_ALPHA,
+          dst_factor_rgb = .ONE_MINUS_SRC_ALPHA,
+          src_factor_alpha = .ONE,
+          dst_factor_alpha = .ZERO,
+        },
+      },
+    },
+  })
+
+  fb.img = sg.make_image({
+    usage = {
+      color_attachment = true,
+    },
+
+    width = width,
+    height = height,
+
+    pixel_format = .RGBA8,
+    sample_count = 1,
+  })
+
+  fb.view = sg.make_view({
+    texture = {
+      image = fb.img,
+    },
+  })
+
+  fb.pass = {
+    attachments = {
+      colors = {
+        0 = sg.make_view({
+          color_attachment = {
+            image = fb.img,
+          },
+        }),
+      },
+    },
+    action = {
+      colors = {
+        0 = {load_action = .CLEAR, clear_value = transmute(sg.Color)clear_color},
+      },
+    },
+  }
+}
+
+destroy_framebuffer :: proc(fb: ^Framebuffer) {
+  sg.destroy_pipeline(fb.pipe)
+  sg.destroy_view(fb.view)
+  sg.destroy_image(fb.img)
+}
+
+framebuffer_draw_start :: proc(fb: Framebuffer) {
+  sg.begin_pass(fb.pass)
+  sg.apply_pipeline(fb.pipe)
+}
+
+framebuffer_draw_end :: proc(fb: Framebuffer) {
+  sg.end_pass()
+}
diff --git a/src/draw/sprite.odin b/src/draw/sprite.odin
new file mode 100644
index 0000000..e62f650
--- /dev/null
+++ b/src/draw/sprite.odin
@@ -0,0 +1,88 @@
+package draw
+
+import "core:fmt"
+import "core:image"
+import "core:image/qoi"
+
+import sg "shared:sokol/gfx"
+
+Sprite :: struct {
+  image: sg.Image,
+  anim: Animation,
+  active_anim: u32,
+  frame_time: f32,
+  current_frame: i32,
+}
+
+init_sprite :: proc(
+  sprite: ^Sprite, 
+  path: string,
+  anim: Animation = {},
+) -> bool {
+  fmt.println(path)
+  img, img_err := qoi.load_from_file(path)
+  if img_err != nil {
+    fmt.println("could not load image")
+    return false
+  }
+  defer image.destroy(img)
+
+  sprite.image = sg.make_image({
+    width = i32(img.width),
+    height = i32(img.height),
+    data = {
+      mip_levels = {
+        0 = {ptr=&img.pixels.buf[0], size=len(img.pixels.buf)},
+      },
+    },
+  })
+  sprite.anim = anim
+
+  return true
+}
+
+set_sprite_active_tag :: proc(sprite: ^Sprite, tag_name: string) {
+  sprite.active_anim = sprite.anim.frame_tags_indices[tag_name]
+}
+
+update_sprite :: proc(sprite: ^Sprite, dt: f32) {
+  sprite.frame_time += dt
+
+  tag := sprite.anim.frame_tags[sprite.active_anim]
+  frame := sprite.anim.frames[sprite.current_frame]
+  duration := f32(frame.duration) / 1000
+
+  if sprite.frame_time > duration {
+    sprite.frame_time -= duration
+    sprite.current_frame += 1
+  }
+
+  if sprite.current_frame < tag.from {
+    sprite.current_frame = tag.to
+  }
+  if sprite.current_frame > tag.to {
+    sprite.current_frame = tag.from
+  }
+}
+
+draw_sprite :: proc(
+  r: ^Renderer,
+  sprite: Sprite,
+  pos: Vec2,
+  offset := Vec2{0, 0},
+  scale := Vec2{1, 1},
+) {
+  frame := sprite.anim.frames[sprite.current_frame]
+  
+  draw_texture(
+    r,
+    sprite.image,
+    Rect {
+      Vec2{f32(frame.rect.x), f32(frame.rect.y)},
+      Vec2{f32(frame.rect.w), f32(frame.rect.h)},
+    },
+    pos,
+    offset,
+    scale,
+  )
+}
diff --git a/src/entity_list.odin b/src/entity_list.odin
new file mode 100644
index 0000000..4890d2c
--- /dev/null
+++ b/src/entity_list.odin
@@ -0,0 +1,81 @@
+package demonchime
+
+// import "core:math"
+
+Entity_Handle :: struct {
+  idx: u32,
+  uses: u32,
+}
+
+Entity_List :: struct($T: typeid) {
+  items: [dynamic]T,
+  holes: [dynamic]Entity_Handle,
+}
+
+delete_entity_list :: proc(list: Entity_List($T)) {
+  delete(list.items)
+  delete(list.holes)
+}
+
+make_entity :: proc(list: ^Entity_List($T), ent: T) -> (Entity_Handle, ^T) {
+  handle: Entity_Handle
+
+  if len(list.holes) > 0 {
+    handle = pop(&list.holes)
+    handle.uses += 1
+  } else {
+    // because index 0 in a handle is considered a null handle
+    resize(&list.items, math.max(2, len(list.items) + 1))
+    handle.idx = u32(len(list.items) - 1)
+    handle.uses = 1
+  }
+
+  list.items[handle.idx] = ent
+  list.items[handle.idx].handle = handle
+  return handle, &list.items[handle.idx]
+}
+
+delete_entity :: proc(list: ^Entity_List($T), handle: Entity_Handle) {
+  if handle.idx <= 0 || int(handle.idx) >= len(list.items) {
+    return
+  }
+  if list.items[handle.idx].handle != handle {
+    return
+  }
+
+  append(&list.holes, handle)
+  list.items[handle.idx] = {}
+}
+
+get_entity :: proc(list: Entity_List($T), h: Entity_Handle) -> ^T {
+  if h.idx < 1 || h.idx >= len(list.items) || list.items[h.idx].handle == h {
+    return nil
+  }
+  return &list.items[h.idx]
+}
+
+active_entity_count :: proc(list: Entity_List($T)) -> int {
+  // - 1 because there's an empty slot at the beginning
+  return len(list.items) - len(list.holes) - 1
+}
+
+Entity_List_Iter :: struct($T: typeid) {
+  list: Entity_List(T),
+  idx: int,
+}
+
+iter_entity_list :: proc(list: Entity_List($T)) -> Entity_List_Iter(T) {
+  return Entity_List_Iter(T) { list = list }
+}
+
+entity_list_iter :: proc(it: ^Entity_List_Iter($T)) -> (^T, bool) {
+  for it.idx < len(it.list.items) {
+    if it.list.items[it.idx].handle.idx > 0 {
+      entity := &it.list.items[it.idx]
+      it.idx += 1
+      return entity, true
+    }
+    it.idx += 1
+  }
+  return nil, false
+}
diff --git a/src/input.odin b/src/input.odin
new file mode 100644
index 0000000..0dad408
--- /dev/null
+++ b/src/input.odin
@@ -0,0 +1,60 @@
+package demonchime
+
+import sapp "shared:sokol/app"
+
+KeybindInput :: union {
+  sapp.Keycode,
+  sapp.Mousebutton,
+}
+
+Keybind :: struct {
+  input: KeybindInput,
+  pressed: bool,
+  just_pressed: bool,
+}
+
+Input :: struct {
+  move_up: Keybind,
+  move_left: Keybind,
+  move_down: Keybind,
+  move_right: Keybind,
+
+  key_down: [sapp.MAX_KEYCODES]bool,
+  key_just_down: [sapp.MAX_KEYCODES]bool,
+  mouse_down: [sapp.MAX_MOUSEBUTTONS]bool,
+  mouse_just_down: [sapp.MAX_MOUSEBUTTONS]bool,
+}
+
+init_keybinds :: proc(input: ^Input) {
+  input.move_up.input = sapp.Keycode.W
+  input.move_left.input = sapp.Keycode.A
+  input.move_down.input = sapp.Keycode.S
+  input.move_right.input = sapp.Keycode.D
+}
+
+input_event :: proc(event: ^sapp.Event, input: ^Input) {
+  #partial switch event.type {
+  case .KEY_DOWN:
+    input.key_down[event.key_code] = true
+    input.key_just_down[event.key_code] = true
+  case .KEY_UP:
+    input.key_down[event.key_code] = false
+  case .MOUSE_DOWN:
+    input.mouse_down[event.key_code] = true
+    input.mouse_just_down[event.key_code] = true
+  case .MOUSE_UP:
+    input.mouse_down[event.key_code] = false
+  }
+}
+
+is_keybind_down :: proc(input: Input, keybind: Keybind) -> bool {
+  switch val in keybind.input {
+  case sapp.Keycode:
+    return input.key_down[val]
+  case sapp.Mousebutton:
+    return input.mouse_down[val]
+  }
+
+  assert(false)
+  return false
+}
diff --git a/src/main.odin b/src/main.odin
new file mode 100644
index 0000000..41af6e3
--- /dev/null
+++ b/src/main.odin
@@ -0,0 +1,80 @@
+package demonchime
+
+// import "core:math"
+// import "core:math/rand"
+// import "core:time"
+
+import "base:runtime"
+
+import sg "shared:sokol/gfx"
+import sapp "shared:sokol/app"
+import sglue "shared:sokol/glue"
+import slog "shared:sokol/log"
+
+import "draw"
+
+Vec2 :: [2]f32
+
+state: struct {
+  player: Player,
+
+  renderer: draw.Renderer,
+
+  input: Input,
+}
+
+init :: proc "c" () {
+  context = runtime.default_context()
+
+  sg.setup({
+    environment = sglue.environment(),
+    logger = {func=slog.func},
+  })
+
+  init_keybinds(&state.input)
+
+  draw.init(&state.renderer)
+
+  init_player(&state.player)
+}
+
+frame :: proc "c" () {
+  context = runtime.default_context()
+
+  update_player(&state.player, f32(sapp.frame_duration()))
+
+  draw.new_frame(&state.renderer)
+
+  draw_player(state.player)
+
+  draw.end_frame(&state.renderer)
+}
+
+event :: proc "c" (event: ^sapp.Event) {
+  context = runtime.default_context()
+
+  if event.type == .KEY_DOWN && event.key_code == .ESCAPE {
+    sapp.quit()
+  }
+
+  input_event(event, &state.input)
+}
+
+cleanup :: proc "c" () {
+  context = runtime.default_context()
+  sg.shutdown()
+}
+
+main :: proc() {
+  sapp.run({
+    init_cb = init,
+    frame_cb = frame,
+    event_cb = event,
+    cleanup_cb = cleanup,
+    width = 800,
+    height = 600,
+    window_title = "Demonchime",
+    icon = {sokol_default = true},
+    logger = {func=slog.func},
+  })
+}
diff --git a/src/player.odin b/src/player.odin
new file mode 100644
index 0000000..01bc02b
--- /dev/null
+++ b/src/player.odin
@@ -0,0 +1,68 @@
+package demonchime
+
+import "core:fmt"
+import "core:math"
+import "core:math/linalg"
+
+import sapp "shared:sokol/app"
+
+import "draw"
+
+Player :: struct {
+  pos: Vec2,
+  anim: draw.Animation,
+  sprite: draw.Sprite,
+}
+
+init_player :: proc(player: ^Player) {
+  anim_ok := draw.init_anim_data(&player.anim, "res/robot2.json")
+  if !anim_ok {
+    fmt.println("coult not load animation")
+    sapp.quit()
+    return
+  }
+
+  draw.init_sprite(&player.sprite, player.anim.image_path, player.anim)
+}
+
+deinit_player :: proc(player: ^Player) {
+  draw.delete_anim_data(player.anim)
+}
+
+update_player :: proc(player: ^Player, dt: f32) {
+  SPEED :: 100
+
+  input: Vec2
+
+  if is_keybind_down(state.input, state.input.move_up) {
+    input.y -= 1
+  }
+  if is_keybind_down(state.input, state.input.move_left) {
+    input.x -= 1
+  }
+  if is_keybind_down(state.input, state.input.move_down) {
+    input.y += 1
+  }
+  if is_keybind_down(state.input, state.input.move_right) {
+    input.x += 1
+  }
+
+  if linalg.length2(input) > 0 {
+    input = linalg.normalize(input)
+    draw.set_sprite_active_tag(&player.sprite, "down_run")
+  } else {
+    draw.set_sprite_active_tag(&player.sprite, "down_idle")
+  }
+
+  player.pos += input * SPEED * dt
+
+  draw.update_sprite(&player.sprite, dt)
+}
+
+draw_player :: proc(player: Player) {
+  draw.draw_sprite(
+    &state.renderer,
+    player.sprite,
+    player.pos,
+  )
+}