Merge pull request #16 from omnisci3nce/port-opengl-ral

Bring back OpenGL (part 1)

1 files changed, 53 insertions, 0 deletions

diff --git a/src/renderer/backends/opengl/backend_opengl.h b/src/renderer/backends/opengl/backend_opengl.h
new file mode 100644
index 0000000..91de38d
--- /dev/null
+++ b/src/renderer/backends/opengl/backend_opengl.h
@@ -0,0 +1,53 @@
+#pragma once
+
+#ifdef CEL_REND_BACKEND_OPENGL
+
+#include "defines.h"
+#include "maths_types.h"
+#include "ral_types.h"
+
+#define MAX_PIPELINE_UNIFORM_BUFFERS 32
+
+typedef struct gpu_swapchain {
+  u32x2 dimensions;
+} gpu_swapchain;
+typedef struct gpu_device {
+} gpu_device;
+typedef struct gpu_pipeline_layout {
+  void *pad
+} gpu_pipeline_layout;
+typedef struct gpu_pipeline {
+  u32 shader_id;
+  vertex_description vertex_desc;
+  buffer_handle uniform_bindings[MAX_PIPELINE_UNIFORM_BUFFERS];
+} gpu_pipeline;
+typedef struct gpu_renderpass {
+  void *pad
+} gpu_renderpass;
+typedef struct gpu_cmd_encoder {
+  gpu_pipeline *pipeline;
+} gpu_cmd_encoder;  // Recording
+typedef struct gpu_cmd_buffer {
+  void *pad
+} gpu_cmd_buffer;  // Ready for submission
+
+typedef struct gpu_buffer {
+  union {
+    u32 vbo;
+    u32 ibo;
+    u32 ubo;
+  } id;
+  u32 vao;  // Optional
+  u64 size;
+} gpu_buffer;
+typedef struct gpu_texture {
+  void *pad
+} gpu_texture;
+
+u32 shader_create_separate(const char *vert_shader, const char *frag_shader);
+
+void uniform_vec3f(u32 program_id, const char *uniform_name, vec3 *value);
+void uniform_f32(u32 program_id, const char *uniform_name, f32 value);
+void uniform_i32(u32 program_id, const char *uniform_name, i32 value);
+void uniform_mat4f(u32 program_id, const char *uniform_name, mat4 *value);
+#endif