wip: some cleanup of ral

8 files changed, 171 insertions, 0 deletions

diff --git a/src/ral/backends/metal/backend_metal.h b/src/ral/backends/metal/backend_metal.h
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/ral/backends/metal/backend_metal.h
diff --git a/src/ral/backends/opengl/backend_opengl.h b/src/ral/backends/opengl/backend_opengl.h
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/ral/backends/opengl/backend_opengl.h
diff --git a/src/ral/backends/vulkan/backend_vulkan.h b/src/ral/backends/vulkan/backend_vulkan.h
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/ral/backends/vulkan/backend_vulkan.h
diff --git a/src/ral/ral.h b/src/ral/ral.h
new file mode 100644
index 0000000..ce3b27d
--- /dev/null
+++ b/src/ral/ral.h
@@ -0,0 +1,5 @@
+#pragma once
+
+#include "ral_types.h"
+#include "ral_common.h"
+#include "ral_impl.h"
\ No newline at end of file
diff --git a/src/ral/ral_common.c b/src/ral/ral_common.c
new file mode 100644
index 0000000..755b489
--- /dev/null
+++ b/src/ral/ral_common.c
@@ -0,0 +1,19 @@
+#include "ral_common.h"
+#include "ral_impl.h"
+
+void backend_pools_init(arena* a, gpu_backend_pools* backend_pools) {
+  pipeline_layout_pool pipeline_layout_pool =
+      pipeline_layout_pool_create(a, MAX_PIPELINES, sizeof(gpu_pipeline_layout));
+  backend_pools->pipeline_layouts = pipeline_layout_pool;
+  pipeline_pool pipeline_pool = pipeline_pool_create(a, MAX_PIPELINES, sizeof(gpu_pipeline));
+  backend_pools->pipelines = pipeline_pool;
+  renderpass_pool rpass_pool = renderpass_pool_create(a, MAX_RENDERPASSES, sizeof(gpu_renderpass));
+  backend_pools->renderpasses = rpass_pool;
+}
+
+void resource_pools_init(arena* a, struct resource_pools* res_pools) {
+  buffer_pool buf_pool = buffer_pool_create(a, MAX_BUFFERS, sizeof(gpu_buffer));
+  res_pools->buffers = buf_pool;
+  texture_pool tex_pool = texture_pool_create(a, MAX_TEXTURES, sizeof(gpu_texture));
+  res_pools->textures = tex_pool;
+}
\ No newline at end of file
diff --git a/src/ral/ral_common.h b/src/ral/ral_common.h
new file mode 100644
index 0000000..bc86945
--- /dev/null
+++ b/src/ral/ral_common.h
@@ -0,0 +1,45 @@
+#pragma once
+#include "defines.h"
+#include "mem.h"
+#include "ral_types.h"
+#include "ral_impl.h"
+
+CORE_DEFINE_HANDLE(buffer_handle);
+CORE_DEFINE_HANDLE(texture_handle);
+CORE_DEFINE_HANDLE(sampler_handle);
+CORE_DEFINE_HANDLE(shader_handle);
+CORE_DEFINE_HANDLE(pipeline_layout_handle);
+CORE_DEFINE_HANDLE(pipeline_handle);
+CORE_DEFINE_HANDLE(renderpass_handle);
+
+#define MAX_SHADER_DATA_LAYOUTS 8
+#define MAX_BUFFERS 256
+#define MAX_TEXTURES 256
+#define MAX_PIPELINES 128
+#define MAX_RENDERPASSES 128
+
+TYPED_POOL(gpu_buffer, buffer);
+TYPED_POOL(gpu_texture, texture);
+TYPED_POOL(gpu_pipeline_layout, pipeline_layout);
+TYPED_POOL(gpu_pipeline, pipeline);
+TYPED_POOL(gpu_renderpass, renderpass);
+
+// --- Handy macros
+#define BUFFER_GET(h) (buffer_pool_get(&context.resource_pools->buffers, h))
+#define TEXTURE_GET(h) (texture_pool_get(&context.resource_pools->textures, h))
+
+// --- Pools
+typedef struct gpu_backend_pools {
+  pipeline_pool pipelines;
+  pipeline_layout_pool pipeline_layouts;
+  renderpass_pool renderpasses;
+} gpu_backend_pools;
+void backend_pools_init(arena* a, gpu_backend_pools* backend_pools);
+
+struct resource_pools {
+  buffer_pool buffers;
+  texture_pool textures;
+};
+void resource_pools_init(arena* a, struct resource_pools* res_pools);
+
+// vertex_description static_3d_vertex_description();
\ No newline at end of file
diff --git a/src/ral/ral_impl.h b/src/ral/ral_impl.h
new file mode 100644
index 0000000..8edf211
--- /dev/null
+++ b/src/ral/ral_impl.h
@@ -0,0 +1,22 @@
+#pragma once
+#include "defines.h"
+#include "ral_types.h"
+
+struct GLFWwindow;
+
+bool gpu_backend_init(const char* window_name, struct GLFWwindow* window);
+void gpu_backend_shutdown();
+
+bool gpu_device_create(gpu_device* out_device);
+void gpu_device_destroy(gpu_device* device);
+
+gpu_pipeline* gpu_graphics_pipeline_create(struct graphics_pipeline_desc description);
+void gpu_pipeline_destroy(gpu_pipeline* pipeline);
+
+// --- Renderpass
+gpu_renderpass* gpu_renderpass_create(const gpu_renderpass_desc* description);
+void gpu_renderpass_destroy(gpu_renderpass* pass);
+
+// --- Swapchain
+bool gpu_swapchain_create(gpu_swapchain* out_swapchain);
+void gpu_swapchain_destroy(gpu_swapchain* swapchain);
\ No newline at end of file
diff --git a/src/ral/ral_types.h b/src/ral/ral_types.h
new file mode 100644
index 0000000..bc24d7f
--- /dev/null
+++ b/src/ral/ral_types.h
@@ -0,0 +1,80 @@
+#pragma once
+
+// Forward declare structs - these must be defined in the backend implementation
+typedef struct gpu_swapchain gpu_swapchain;
+typedef struct gpu_device gpu_device;
+typedef struct gpu_pipeline_layout gpu_pipeline_layout;
+typedef struct gpu_pipeline gpu_pipeline;
+typedef struct gpu_renderpass gpu_renderpass;
+typedef struct gpu_cmd_encoder gpu_cmd_encoder;  // Recording
+typedef struct gpu_cmd_buffer gpu_cmd_buffer;    // Ready for submission
+typedef struct gpu_buffer gpu_buffer;
+typedef struct gpu_texture gpu_texture;
+
+typedef enum gpu_primitive_topology {
+  CEL_PRIMITIVE_TOPOLOGY_POINT,
+  CEL_PRIMITIVE_TOPOLOGY_LINE,
+  CEL_PRIMITIVE_TOPOLOGY_LINE_STRIP,
+  CEL_PRIMITIVE_TOPOLOGY_TRIANGLE,
+  CEL_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP,
+  CEL_PRIMITIVE_TOPOLOGY_COUNT
+} gpu_primitive_topology;
+
+typedef enum gpu_texture_type {
+  CEL_TEXTURE_TYPE_2D,
+  CEL_TEXTURE_TYPE_3D,
+  CEL_TEXTURE_TYPE_2D_ARRAY,
+  CEL_TEXTURE_TYPE_CUBE_MAP,
+  CEL_TEXTURE_TYPE_COUNT
+} gpu_texture_type;
+
+typedef enum gpu_texture_format {
+  CEL_TEXTURE_FORMAT_8_8_8_8_RGBA_UNORM,
+  CEL_TEXTURE_FORMAT_DEPTH_DEFAULT,
+  CEL_TEXTURE_FORMAT_COUNT
+} gpu_texture_format;
+
+// Vertex attributes
+/// @strip_prefix(ATTR_)
+typedef enum vertex_attrib_type {
+  ATTR_F32,
+  ATTR_F32x2,
+  ATTR_F32x3,
+  ATTR_F32x4,
+  ATTR_U32,
+  ATTR_U32x2,
+  ATTR_U32x3,
+  ATTR_U32x4,
+  ATTR_I32,
+  ATTR_I32x2,
+  ATTR_I32x3,
+  ATTR_I32x4,
+} vertex_attrib_type;
+
+typedef struct graphics_pipeline_desc {
+  const char* debug_name;
+  vertex_description vertex_desc;
+  shader_desc vs; /** @brief Vertex shader stage */
+  shader_desc fs; /** @brief Fragment shader stage */
+
+  // Roughly equivalent to a descriptor set layout each. each layout can have multiple bindings
+  // examples:
+  // - uniform buffer reprensenting view projection matrix
+  // - texture for shadow map
+  shader_data data_layouts[MAX_SHADER_DATA_LAYOUTS];
+  u32 data_layouts_count;
+
+  // gpu_pipeline_layout* layout;
+  gpu_renderpass* renderpass;
+
+  bool wireframe;
+  bool depth_test;
+} graphics_pipeline_desc;
+
+typedef struct gpu_renderpass_desc {
+  bool default_framebuffer;
+  bool has_color_target;
+  texture_handle  color_target; // for now only support one
+  bool has_depth_stencil;
+  texture_handle  depth_stencil;
+} gpu_renderpass_desc;
\ No newline at end of file