Material

src/dawnopengl/display/shader/CMakeLists.txt

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+# Copyright (c) 2022 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+target_sources(${DAWN_TARGET_NAME}
+  PRIVATE
+    Shader.cpp
+)

src/dawnopengl/display/shader/Shader.cpp

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+// Copyright (c) 2022 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "Shader.hpp"
+
+using namespace Dawn;
+
+void Shader::compileShader(
+  std::string vertexShader,
+  std::string fragmentShader
+) {
+  GLint isSuccess;
+  int32_t maxLength;
+  char error[1024];
+  
+  // Load the vertex shader first
+  this->shaderVertex = glCreateShader(GL_VERTEX_SHADER);
+  auto vertShaderC = vertexShader.c_str();
+  glShaderSource(this->shaderVertex, 1, &vertShaderC, 0);
+  glCompileShader(this->shaderVertex);
+
+  // Validate
+  glGetShaderiv(this->shaderVertex, GL_COMPILE_STATUS, &isSuccess);
+  if(!isSuccess) {
+    glGetShaderiv(this->shaderVertex, GL_INFO_LOG_LENGTH, &maxLength);
+    glGetShaderInfoLog(this->shaderVertex, maxLength, &maxLength, error);
+    throw error;
+  }
+
+  // Now load the Frag shader
+  this->shaderFrag = glCreateShader(GL_FRAGMENT_SHADER);
+  auto fragShaderC = fragmentShader.c_str();
+  glShaderSource(this->shaderFrag, 1, &fragShaderC, 0);
+  glCompileShader(this->shaderFrag);
+  glGetShaderiv(this->shaderFrag, GL_COMPILE_STATUS, &isSuccess);
+  if(!isSuccess) {
+    glGetShaderiv(this->shaderFrag, GL_INFO_LOG_LENGTH, &maxLength);
+    glGetShaderInfoLog(this->shaderFrag, maxLength, &maxLength, error);
+    glDeleteShader(this->shaderVertex);
+    throw error;
+  }
+
+  // Now create the shader program.
+  this->shaderProgram = glCreateProgram();
+  glAttachShader(this->shaderProgram, this->shaderVertex);
+  glAttachShader(this->shaderProgram, this->shaderFrag);
+
+  //Bind, Verify & Use the shader program
+  glLinkProgram(this->shaderProgram);
+  glGetProgramiv(this->shaderProgram, GL_LINK_STATUS, &isSuccess);
+  if(!isSuccess) {
+    glGetProgramiv(this->shaderProgram, GL_INFO_LOG_LENGTH, &maxLength);
+    glGetProgramInfoLog(this->shaderProgram, maxLength, &maxLength, error);
+    glDeleteShader(this->shaderVertex);
+    glDeleteShader(this->shaderFrag);
+    throw error;
+  }
+
+  // Now parse out the variables.
+}
+
+shaderparameter_t Shader::getParameterByName(std::string name) {
+  return glGetUniformLocation(this->shaderProgram, name.c_str());
+}
+
+void Shader::setMatrix(shaderparameter_t uniform, glm::mat4 matrix) {
+  glUniformMatrix4fv(uniform, 1, GL_FALSE, glm::value_ptr(matrix));
+}
+
+void Shader::setBoolean(shaderparameter_t uni, bool value) {
+  glUniform1i(uni, value);
+}
+
+void Shader::setColor(shaderparameter_t uniform, struct Color color) {
+  glUniform4f(uniform, color.r, color.g, color.b, color.a);
+}
+
+void Shader::setVector3(shaderparameter_t uniform, glm::vec3 vector) {
+  glUniform3f(uniform, vector.x, vector.y, vector.z);
+}
+
+void Shader::bind() {
+  if(this->shaderProgram == -1) throw "Shader has not yet been compiled";
+  glUseProgram(this->shaderProgram);
+}
+
+Shader::~Shader() {
+  if(this->shaderProgram != -1) glDeleteProgram(this->shaderProgram);
+  if(this->shaderVertex != -1) glDeleteShader(this->shaderVertex);
+  if(this->shaderFrag != -1) glDeleteShader(this->shaderFrag);
+}

src/dawnopengl/display/shader/Shader.hpp

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+// Copyright (c) 2022 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "display/shader/_Shader.hpp"
+#include "dawnopengl.hpp"
+#include "display/Color.hpp"
+
+typedef GLuint shaderparameter_t;
+
+namespace Dawn {
+  class Shader : public IShader<shaderparameter_t> {
+    private:
+      /** Pointer to an uploaded vertex shader program */
+      GLuint shaderVertex = -1;
+
+      /** Pointer to an uploaded fragment shader program */
+      GLuint shaderFrag = -1;
+
+      /** Pointer to an uploaded shader program linked */
+      GLuint shaderProgram = -1;
+
+    protected:
+      void compileShader(
+        std::string vertexShader,
+        std::string fragmentShader
+      );
+
+    public:
+      /**
+       * Locate a shader parameter by its name.
+       * 
+       * @param name Name of the parameter to get.
+       * @return The shader parameter.
+       */
+      shaderparameter_t getParameterByName(std::string name);
+
+      void bind() override;
+      virtual void compile() = 0;
+      void setMatrix(shaderparameter_t parameter, glm::mat4 matrix) override;
+      void setBoolean(shaderparameter_t parameter, bool_t value) override;
+      void setColor(shaderparameter_t parameter, struct Color color) override;
+      void setVector3(shaderparameter_t parameter, glm::vec3 vector) override;
+
+      ~Shader();
+  };
+}

src/dawnopengl/display/shader/SimpleTexturedShader.hpp

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+// Copyright (c) 2022 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "display/shader/Shader.hpp"
+#include "scene/components/Components.hpp"
+
+namespace Dawn {
+  class SimpleTexturedShader : public Shader {
+    private:
+      shaderparameter_t paramProjection;
+      shaderparameter_t paramView;
+      shaderparameter_t paramModel;
+      shaderparameter_t paramColor;
+      shaderparameter_t paramTexture;
+      shaderparameter_t paramHasTexture;
+
+    public:
+      std::map<shaderparameter_t, enum ShaderParameterType>
+      getParameters() override {
+        std::map<shaderparameter_t, enum ShaderParameterType> ps;
+
+        ps[this->paramColor] = SHADER_PARAMETER_TYPE_COLOR;
+        // ps[paramTexture] SHADER_PARAMETER_TYPE_TEXTURE;
+        // ps[this->paramHasTexture] = SHADER_PARAMETER_TYPE_BOOLEAN;
+
+        return ps;
+      }
+      
+      void setDefaultParameters(Material &material) override {
+        material.colorValues[this->paramColor] = COLOR_MAGENTA;
+      }
+
+      void setGlobalParameters(glm::mat4 proj, glm::mat4 view) override {
+        this->setMatrix(this->paramProjection, proj);
+        this->setMatrix(this->paramView, view);
+      }
+
+      void setMeshParameters(glm::mat4 transform) override {
+        this->setMatrix(this->paramModel, transform);
+      }
+
+      void compile() override {
+        this->compileShader(
+          // Vertex Shader
+          "#version 330 core\n"
+          "layout (location = 0) in vec3 aPos;\n"
+          "layout (location = 1) in vec2 aTexCoord;\n"
+
+          "uniform mat4 u_Proj;\n"
+          "uniform mat4 u_View;\n"
+          "uniform mat4 u_Model;\n"
+
+          "out vec2 o_TextCoord;\n"
+          "void main() {\n"
+            "gl_Position = u_Proj * u_View * u_Model * vec4(aPos, 1.0);\n"
+            "o_TextCoord = vec2(aTexCoord.x, aTexCoord.y);\n"
+          "}",
+
+          // Fragment Shader
+          "#version 330 core\n"
+          "out vec4 o_Color;\n"
+          "in vec2 o_TextCoord;\n"
+          "uniform vec4 u_Color;\n"
+          "uniform sampler2D u_Text;\n"
+          "uniform bool u_HasTexture;\n"
+
+          "void main() {\n"
+            "if(u_HasTexture) {\n"
+              "o_Color = texture(u_Text, o_TextCoord) * u_Color;\n"
+            "} else {\n"
+              "o_Color = u_Color;"
+            "}\n"
+          "}\n"
+        );
+
+        this->paramProjection = this->getParameterByName("u_Proj");
+        this->paramView = this->getParameterByName("u_View");
+        this->paramModel = this->getParameterByName("u_Model");
+        this->paramColor = this->getParameterByName("u_Color");
+        this->paramTexture = this->getParameterByName("u_Text");
+        this->paramHasTexture = this->getParameterByName("u_HasTexture");
+
+        this->setBoolean(this->paramHasTexture, false);
+        this->setColor(this->paramColor, COLOR_WHITE);
+      }
+  };
+}