1 files changed, 92 insertions, 0 deletions
diff --git a/core/renderer/gles3.c b/core/renderer/gles3.c
new file mode 100644
index 0000000..5dd1538
--- /dev/null
+++ b/core/renderer/gles3.c
@@ -0,0 +1,92 @@
+#include "core/renderer.h"
+#include "core/window.h"
+#include "internal/utils.h"
+
+#include <GLES2/gl2.h>
+#include <GLES3/gl3.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+GLuint load_shader(const char *code, uint type) {
+  int success;
+  char infoLog[512];
+  GLuint shader = glCreateShader(type);
+
+  glShaderSource(shader, 1, &code, NULL);
+  glCompileShader(shader);
+  glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
+
+  if (!success) {
+    glGetShaderInfoLog(shader, 512, NULL, infoLog);
+    printf("Shader compilation failed: %s\n", infoLog);
+  }
+
+  return shader;
+}
+
+struct ruim_rendererGLES RuimSetupGLES(void) {
+  int success;
+  char infoLog[512];
+  struct ruim_rendererGLES renderer;
+  float vertices[] = {-0.5f, -0.5f, 0.0f, 0.5f, -0.5f, 0.0f, 0.0f, 0.5f, 0.0f};
+
+  GLuint vertexShdr =
+      load_shader("#version 300 es\n"
+                  "layout (location = 0) in vec3 aPos;\n"
+                  "void main()\n"
+                  "{\n"
+                  "gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+                  "}\0",
+                  GL_VERTEX_SHADER);
+
+  GLuint fragmentShdr = load_shader("#version 300 es\n"
+                                    "precision mediump float;\n"
+                                    "out vec4 FragColor;\n"
+                                    "void main()\n"
+                                    "{\n"
+                                    "FragColor = vec4(1.0, 0.5, 0.2, 1.0);\n"
+                                    "}\0",
+                                    GL_FRAGMENT_SHADER);
+
+  glGenBuffers(1, &renderer.VBO);
+  glGenVertexArrays(1, &renderer.VAO);
+
+  renderer.shaderProgram = glCreateProgram();
+  glAttachShader(renderer.shaderProgram, vertexShdr);
+  glAttachShader(renderer.shaderProgram, fragmentShdr);
+  glLinkProgram(renderer.shaderProgram);
+  glGetProgramiv(renderer.shaderProgram, GL_LINK_STATUS, &success);
+  if (!success) {
+    glGetProgramInfoLog(renderer.shaderProgram, 512, NULL, infoLog);
+    printf("Program linking failed: %s\n", infoLog);
+  }
+
+  glDeleteShader(vertexShdr);
+  glDeleteShader(fragmentShdr);
+
+  glBindVertexArray(renderer.VAO);
+
+  glBindBuffer(GL_ARRAY_BUFFER, renderer.VBO);
+  glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void *)0);
+  glEnableVertexAttribArray(0);
+
+  glBindVertexArray(0);
+
+  return renderer;
+}
+
+void RuimResizeGLES(struct ruim_rendererGLES *renderer, int width, int height) {
+  glViewport(0, 0, width, height);
+}
+
+void RuimRenderGLES(struct ruim_rendererGLES *renderer) {
+  glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+  glClear(GL_COLOR_BUFFER_BIT);
+
+  glUseProgram(renderer->shaderProgram);
+  glBindVertexArray(renderer->VAO);
+  glDrawArrays(GL_TRIANGLES, 0, 3);
+}