Alberto Torres
9af1322937
* Incomplete port of myou-engine-js to nimskull, after many months of work, and a few extra features that weren't exactly necessary for a "first commit" to work. Excuse the lack of commit history up to this point. * Bare bones structure of the documentation and the process to update it. * Restructure of the whole project to have a more sensible organization. * Making submodules of forks of larger libraries. * README, licenses, AUTHORS.md.
123 lines
5 KiB
Nim
123 lines
5 KiB
Nim
# The contents of this file are subject to the Common Public Attribution License
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# Version 1.0 (the “License”); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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# https://myou.dev/licenses/LICENSE-CPAL. The License is based on the Mozilla
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# Public License Version 1.1 but Sections 14 and 15 have been added to cover use
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# of software over a computer network and provide for limited attribution for
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# the Original Developer. In addition, Exhibit A has been modified to be
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# consistent with Exhibit B.
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#
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# Software distributed under the License is distributed on an “AS IS” basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
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# the specific language governing rights and limitations under the License.
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#
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# The Original Code is Myou Engine.
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#
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# the Original Developer is the Initial Developer.
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#
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# The Initial Developer of the Original Code is the Myou Engine developers.
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# All portions of the code written by the Myou Engine developers are Copyright
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# (c) 2024. All Rights Reserved.
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#
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# Alternatively, the contents of this file may be used under the terms of the
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# GNU Affero General Public License version 3 (the [AGPL-3] License), in which
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# case the provisions of [AGPL-3] License are applicable instead of those above.
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#
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# If you wish to allow use of your version of this file only under the terms of
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# the [AGPL-3] License and not to allow others to use your version of this file
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# under the CPAL, indicate your decision by deleting the provisions above and
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# replace them with the notice and other provisions required by the [AGPL-3]
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# License. If you do not delete the provisions above, a recipient may use your
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# version of this file under either the CPAL or the [AGPL-3] License.
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import ../types
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import std/tables
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# Forward declarations
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proc newEffectShader*(engine: MyouEngine, texture_names: seq[string],
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texture_types: seq[TextureType] = @[],
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library = "", code = "", output_names = @["outColor"],
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mat_name = "effect_shader",
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defines = initTable[string, string](),
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add_input_size_ubo = true): Material
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# End forward declarations
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import std/strformat
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import std/strutils
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import ../graphics/material
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import ../graphics/render
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import ../graphics/ubo
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proc newEffectShader*(engine: MyouEngine, texture_names: seq[string],
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texture_types: seq[TextureType] = @[],
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library = "", code = "", output_names = @["outColor"],
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mat_name = "effect_shader",
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defines = initTable[string, string](),
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add_input_size_ubo = true): Material =
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var textures: OrderedTable[string, Texture]
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var samplers_code: seq[string]
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var extensions = ""
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for i,name in texture_names:
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textures[name] = nil
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let t = if i < texture_types.len:
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texture_types[i]
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else:
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Tex2D
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let gltype = case t:
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of Tex2D: "sampler2D"
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of Tex2DArray: "sampler2DArray"
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of Tex3D: "sampler3D"
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of TexCube: "samplerCube"
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of TexExternal:
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extensions = "#extension GL_OES_EGL_image_external_essl3 : require"
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"samplerExternalOES"
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samplers_code.add &"uniform {gltype} {name};"
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if add_input_size_ubo:
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samplers_code.add &"#define {name}_size inputs[{i}].size"
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samplers_code.add &"#define {name}_px_size inputs[{i}].px_size"
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samplers_code.add &"#define {name}_px_lod inputs[{i}].px_lod"
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var outputs_code: seq[string]
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for o in output_names:
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outputs_code.add &"out vec4 {o};"
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var ubos: seq[UBO]
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if add_input_size_ubo:
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ubos.add engine.newUBO("EffectShaderInputs",
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EffectShaderInput, texture_names.len)
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samplers_code.insert(dedent """
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struct EffectShaderInput {
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vec3 size;
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float px_lod;
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vec3 px_size;
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float lod;
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};
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layout(std140) uniform EffectShaderInputs {
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EffectShaderInput inputs[""" & $textures.len & """];
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};""", 0)
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result = engine.newMaterial(mat_name, nil,
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vertex = extensions & "\n" &
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get_render_uniform_blocks() & "\n" &
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dedent &"""
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in vec3 vertex;
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out vec2 coord;
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out vec3 coord3D, coord3D_x, coord3D_y;
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void main(){{
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coord = vertex.xy;
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// TODO:
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coord3D = (view_matrix_inverse * vec4(vec3(vertex.xy*2.0-1.0, -1.0), 0.0)).xyz;
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coord3D_x = coord3D.zxy;
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coord3D_y = coord3D.yzx;
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gl_Position = vec4(vertex.xy*2.0-1.0, 0.0, 1.0);
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}}""",
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fragment = @[
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library,
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samplers_code.join("\n"),
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"in vec2 coord;",
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"in vec3 coord3D, coord3D_x, coord3D_y;",
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outputs_code.join("\n"),
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"void main(){",
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code,
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"}"].join("\n"),
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ubos = ubos,
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textures = textures,
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defines = defines,
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)
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