delete documentation workflow

1 files changed, 0 insertions, 449 deletions

diff --git a/src/ral/backends/opengl/backend_opengl.c b/src/ral/backends/opengl/backend_opengl.c
deleted file mode 100644
index 613d7e1..0000000
--- a/src/ral/backends/opengl/backend_opengl.c
+++ /dev/null
@@ -1,449 +0,0 @@
-#include "backend_opengl.h"
-#include "colours.h"
-#include "maths_types.h"
-#if defined(CEL_REND_BACKEND_OPENGL)
-#include <assert.h>
-#include "log.h"
-#include "mem.h"
-#include "opengl_helpers.h"
-#include "ral_common.h"
-#include "ral_impl.h"
-#include "ral_types.h"
-
-#include <glad/glad.h>
-#include <glfw3.h>
-
-typedef struct OpenglCtx {
-  GLFWwindow* window;
-  arena pool_arena;
-  GPU_Swapchain swapchain;
-  GPU_CmdEncoder main_encoder;
-  GPU_BackendPools gpu_pools;
-  ResourcePools* resource_pools;
-} OpenglCtx;
-
-static OpenglCtx context;
-
-bool GPU_Backend_Init(const char* window_name, struct GLFWwindow* window,
-                      struct ResourcePools* res_pools) {
-  INFO("loading OpenGL backend");
-
-  memset(&context, 0, sizeof(context));
-  context.window = window;
-
-  size_t pool_buffer_size = 1024 * 1024;
-  context.pool_arena = arena_create(malloc(pool_buffer_size), pool_buffer_size);
-
-  BackendPools_Init(&context.pool_arena, &context.gpu_pools);
-  context.resource_pools = res_pools;
-
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
-  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-  glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
-
-  // glad: load all opengl function pointers
-  if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
-    ERROR("Failed to initialise GLAD \n");
-    return false;
-  }
-
-  glEnable(GL_DEPTH_TEST);
-  glEnable(GL_CULL_FACE);
-
-  context.swapchain = (GPU_Swapchain){ .dimensions = u32x2(1000, 1000) };
-
-  return true;
-}
-
-// All of these are no-ops in OpenGL
-void GPU_Backend_Shutdown() { /* TODO */ }
-bool GPU_Device_Create(GPU_Device* out_device) { return true; }
-void GPU_Device_Destroy(GPU_Device* device) {}
-bool GPU_Swapchain_Create(GPU_Swapchain* out_swapchain) { return true; }
-void GPU_Swapchain_Destroy(GPU_Swapchain* swapchain) {}
-void GPU_CmdEncoder_Destroy(GPU_CmdEncoder* encoder) {}
-
-void GPU_CmdEncoder_BeginRender(GPU_CmdEncoder* encoder, GPU_Renderpass* renderpass) {
-  glBindFramebuffer(GL_FRAMEBUFFER, renderpass->fbo);
-  // rgba clear_colour = STONE_800;
-  // glClearColor(clear_colour.r, clear_colour.g, clear_colour.b, 1.0f);
-  // if (renderpass->description.has_depth_stencil) {
-  //   glClear(GL_DEPTH_BUFFER_BIT);
-  // } else {
-  //   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-  // }
-}
-
-void GPU_CmdEncoder_EndRender(GPU_CmdEncoder* encoder) { glBindFramebuffer(GL_FRAMEBUFFER, 0); }
-
-GPU_CmdEncoder* GPU_GetDefaultEncoder() { return &context.main_encoder; }
-void GPU_QueueSubmit(GPU_CmdBuffer* cmd_buffer) {}
-
-void GPU_Swapchain_Resize(i32 new_width, i32 new_height) {
-  context.swapchain.dimensions = u32x2(new_width, new_height);
-}
-
-u32x2 GPU_Swapchain_GetDimensions() { return context.swapchain.dimensions; }
-
-GPU_Renderpass* GPU_Renderpass_Create(GPU_RenderpassDesc description) {
-  // allocate new pass
-  GPU_Renderpass* renderpass = Renderpass_pool_alloc(&context.gpu_pools.renderpasses, NULL);
-  renderpass->description = description;
-
-  if (!description.default_framebuffer) {
-    // If we're not using the default framebuffer we need to generate a new one
-    GLuint gl_fbo_id;
-    glGenFramebuffers(1, &gl_fbo_id);
-    renderpass->fbo = gl_fbo_id;
-  } else {
-    renderpass->fbo = OPENGL_DEFAULT_FRAMEBUFFER;
-    assert(!description.has_color_target);
-    assert(!description.has_depth_stencil);
-  }
-  glBindFramebuffer(GL_FRAMEBUFFER, renderpass->fbo);
-
-  if (description.has_color_target && !description.default_framebuffer) {
-    GPU_Texture* colour_attachment = TEXTURE_GET(description.color_target);
-    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
-                           colour_attachment->id, 0);
-  }
-  if (description.has_depth_stencil && !description.default_framebuffer) {
-    GPU_Texture* depth_attachment = TEXTURE_GET(description.depth_stencil);
-    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depth_attachment->id,
-                           0);
-  }
-
-  if (description.has_depth_stencil && !description.has_color_target) {
-    glDrawBuffer(GL_NONE);
-    glReadBuffer(GL_NONE);
-  }
-
-  glBindFramebuffer(GL_FRAMEBUFFER, 0);  // reset to default framebuffer
-
-  return renderpass;
-}
-
-void GPU_Renderpass_Destroy(GPU_Renderpass* pass) { glDeleteFramebuffers(1, &pass->fbo); }
-
-GPU_Pipeline* GPU_GraphicsPipeline_Create(GraphicsPipelineDesc description,
-                                          GPU_Renderpass* renderpass) {
-  GPU_Pipeline* pipeline = Pipeline_pool_alloc(&context.gpu_pools.pipelines, NULL);
-
-  // Create shader program
-  u32 shader_id = shader_create_separate(description.vs.filepath.buf, description.fs.filepath.buf);
-  pipeline->shader_id = shader_id;
-
-  // Vertex format
-  pipeline->vertex_desc = description.vertex_desc;
-
-  // Allocate uniform buffers if needed
-  u32 ubo_count = 0;
-  // printf("data layouts %d\n", description.data_layouts_count);
-  for (u32 layout_i = 0; layout_i < description.data_layouts_count; layout_i++) {
-    ShaderDataLayout sdl = description.data_layouts[layout_i];
-    TRACE("Got shader data layout %d's bindings! . found %d", layout_i, sdl.binding_count);
-
-    for (u32 binding_j = 0; binding_j < sdl.binding_count; binding_j++) {
-      u32 binding_id = binding_j;
-      assert(binding_id < MAX_PIPELINE_UNIFORM_BUFFERS);
-      ShaderBinding binding = sdl.bindings[binding_j];
-      // Do I want Buffer vs Bytes?
-      if (binding.kind == BINDING_BYTES) {
-        static u32 s_binding_point = 0;
-        BufferHandle ubo_handle = GPU_BufferCreate(binding.data.bytes.size, BUFFER_UNIFORM,
-                                                   BUFFER_FLAG_GPU, NULL);  // no data right now
-        pipeline->uniform_bindings[ubo_count++] = ubo_handle;
-        GPU_Buffer* ubo_buf = BUFFER_GET(ubo_handle);
-
-        i32 blockIndex = glGetUniformBlockIndex(pipeline->shader_id, binding.label);
-        printf("Block index for %s: %d", binding.label, blockIndex);
-        if (blockIndex < 0) {
-          WARN("Couldn't retrieve block index for uniform block '%s'", binding.label);
-        } else {
-          // DEBUG("Retrived block index %d for %s", blockIndex, binding.label);
-        }
-        u32 blocksize;
-        glGetActiveUniformBlockiv(pipeline->shader_id, blockIndex, GL_UNIFORM_BLOCK_DATA_SIZE,
-                                  &blocksize);
-        printf("\t with size %d bytes\n", blocksize);
-
-        glBindBufferBase(GL_UNIFORM_BUFFER, s_binding_point, ubo_buf->id.ubo);
-        if (blockIndex != GL_INVALID_INDEX) {
-          glUniformBlockBinding(pipeline->shader_id, blockIndex, s_binding_point);
-        }
-        ubo_buf->ubo_binding_point = s_binding_point++;
-        ubo_buf->name = binding.label;
-        assert(s_binding_point < GL_MAX_UNIFORM_BUFFER_BINDINGS);
-      }
-    }
-  }
-  pipeline->uniform_count = ubo_count;
-
-  pipeline->renderpass = renderpass;
-  pipeline->wireframe = description.wireframe;
-
-  return pipeline;
-}
-
-void GraphicsPipeline_Destroy(GPU_Pipeline* pipeline) {}
-
-GPU_CmdEncoder GPU_CmdEncoder_Create() {
-  GPU_CmdEncoder encoder = { 0 };
-  return encoder;
-}
-
-BufferHandle GPU_BufferCreate(u64 size, GPU_BufferType buf_type, GPU_BufferFlags flags,
-                              const void* data) {
-  // "allocating" the cpu-side buffer struct
-  BufferHandle handle;
-  GPU_Buffer* buffer = Buffer_pool_alloc(&context.resource_pools->buffers, &handle);
-  buffer->size = size;
-  buffer->vao = 0;
-
-  // Opengl buffer
-  GLuint gl_buffer_id;
-  glGenBuffers(1, &gl_buffer_id);
-
-  GLenum gl_buf_type;
-  GLenum gl_buf_usage = GL_STATIC_DRAW;
-
-  switch (buf_type) {
-    case BUFFER_UNIFORM:
-      DEBUG("Creating Uniform buffer");
-      gl_buf_type = GL_UNIFORM_BUFFER;
-      /* gl_buf_usage = GL_DYNAMIC_DRAW; */
-      buffer->id.ubo = gl_buffer_id;
-      break;
-    case BUFFER_DEFAULT:
-    case BUFFER_VERTEX:
-      DEBUG("Creating Vertex buffer");
-      gl_buf_type = GL_ARRAY_BUFFER;
-      buffer->id.vbo = gl_buffer_id;
-      break;
-    case BUFFER_INDEX:
-      DEBUG("Creating Index buffer");
-      gl_buf_type = GL_ELEMENT_ARRAY_BUFFER;
-      buffer->id.ibo = gl_buffer_id;
-      break;
-    default:
-      WARN("Unimplemented gpu_buffer_type provided %s", buffer_type_names[buf_type]);
-      break;
-  }
-  // bind buffer
-  glBindBuffer(gl_buf_type, gl_buffer_id);
-
-  if (data) {
-    TRACE("Upload data (%d bytes) as part of buffer creation", size);
-    glBufferData(gl_buf_type, buffer->size, data, gl_buf_usage);
-  } else {
-    TRACE("Allocating but not uploading (%d bytes)", size);
-    glBufferData(gl_buf_type, buffer->size, NULL, gl_buf_usage);
-  }
-
-  glBindBuffer(gl_buf_type, 0);
-
-  return handle;
-}
-
-void GPU_BufferDestroy(BufferHandle handle) { glDeleteBuffers(1, &handle.raw); }
-
-TextureHandle GPU_TextureCreate(TextureDesc desc, bool create_view, const void* data) {
-  // "allocating" the cpu-side struct
-  TextureHandle handle;
-  GPU_Texture* texture = Texture_pool_alloc(&context.resource_pools->textures, &handle);
-  DEBUG("Allocated texture with handle %d", handle.raw);
-
-  GLuint gl_texture_id;
-  glGenTextures(1, &gl_texture_id);
-  texture->id = gl_texture_id;
-
-  GLenum gl_tex_type = opengl_tex_type(desc.tex_type);
-  texture->type = desc.tex_type;
-  printf("Creating texture of type %s\n", texture_type_names[desc.tex_type]);
-  glBindTexture(gl_tex_type, gl_texture_id);
-
-  GLint internal_format;
-  if (desc.format == TEXTURE_FORMAT_DEPTH_DEFAULT) {
-    internal_format = GL_DEPTH_COMPONENT;
-  } else if (desc.format == TEXTURE_FORMAT_8_8_8_8_RGBA_UNORM) {
-    internal_format = GL_RGBA;
-  } else {
-    internal_format = GL_RGB;
-  }
-
-  GLint format = internal_format;
-  // FIXME: GLint format = desc.format == TEXTURE_FORMAT_DEPTH_DEFAULT ? GL_DEPTH_COMPONENT :
-  // GL_RGBA;
-  GLenum data_type = desc.format == TEXTURE_FORMAT_DEPTH_DEFAULT ? GL_FLOAT : GL_UNSIGNED_BYTE;
-
-  if (desc.format == TEXTURE_FORMAT_DEPTH_DEFAULT) {
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
-  } else {
-    // set the texture wrapping parameters
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
-                    GL_REPEAT);  // set texture wrapping to GL_REPEAT (default wrapping method)
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-    // set texture filtering parameters
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-  }
-
-  if (data) {
-    glTexImage2D(GL_TEXTURE_2D, 0, internal_format, desc.extents.x, desc.extents.y, 0, format,
-                 data_type, data);
-    if (desc.tex_type == TEXTURE_TYPE_2D) {
-      glGenerateMipmap(GL_TEXTURE_2D);
-    }
-  } else {
-    WARN("No image data provided");
-    glTexImage2D(GL_TEXTURE_2D, 0, internal_format, desc.extents.x, desc.extents.y, 0, format,
-                 data_type, NULL);
-  }
-
-  glBindTexture(GL_TEXTURE_2D, 0);
-
-  return handle;
-}
-
-GPU_Texture* GPU_TextureAlloc(TextureHandle* out_handle) {
-  TextureHandle handle;
-  GPU_Texture* texture = Texture_pool_alloc(&context.resource_pools->textures, &handle);
-  DEBUG("Allocated texture with handle %d", handle.raw);
-
-  GLuint gl_texture_id;
-  glGenTextures(1, &gl_texture_id);
-  texture->id = gl_texture_id;
-
-  if (out_handle != NULL) {
-    *out_handle = handle;
-  }
-
-  return texture;
-}
-
-void GPU_TextureDestroy(TextureHandle handle) { glDeleteTextures(1, &handle.raw); }
-
-// TODO: void GPU_TextureUpload(TextureHandle handle, size_t n_bytes, const void* data)
-
-void GPU_EncodeBindPipeline(GPU_CmdEncoder* encoder, GPU_Pipeline* pipeline) {
-  encoder->pipeline = pipeline;
-
-  // In OpenGL binding a pipeline is more or less equivalent to just setting the shader
-  glUseProgram(pipeline->shader_id);
-
-  if (pipeline->wireframe) {
-    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
-  } else {
-    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
-  }
-}
-
-void GPU_EncodeBindShaderData(GPU_CmdEncoder* encoder, u32 group, ShaderDataLayout layout) {
-  for (u32 binding_i = 0; binding_i < layout.binding_count; binding_i++) {
-    ShaderBinding binding = layout.bindings[binding_i];
-
-    switch (binding.kind) {
-      case BINDING_BYTES: {
-#ifdef RAL_ASSERTS
-        CASSERT_MSG(binding.data.bytes.data, "void* data pointer should be non null");
-        CASSERT_MSG(binding.data.bytes.size > 0, "size should be greater than 0 bytes");
-#endif
-        BufferHandle b;
-        GPU_Buffer* ubo_buf;
-        bool found = false;
-        for (u32 i = 0; i < encoder->pipeline->uniform_count; i++) {
-          b = encoder->pipeline->uniform_bindings[i];
-          ubo_buf = BUFFER_GET(b);
-          assert(ubo_buf->name != NULL);
-          if (strcmp(ubo_buf->name, binding.label) == 0) {
-            found = true;
-            break;
-          }
-        }
-        if (!found) {
-          ERROR("Couldnt find uniform buffer object for %s!!", binding.label);
-          break;
-        }
-
-        i32 blockIndex = glGetUniformBlockIndex(encoder->pipeline->shader_id, binding.label);
-        if (blockIndex < 0) {
-          WARN("Couldn't retrieve block index for uniform block '%s'", binding.label);
-          break;
-        }
-
-        glBindBuffer(GL_UNIFORM_BUFFER, ubo_buf->id.ubo);
-        glBufferSubData(GL_UNIFORM_BUFFER, 0, ubo_buf->size, binding.data.bytes.data);
-        break;
-      }
-      case BINDING_TEXTURE: {
-        GPU_Texture* tex = TEXTURE_GET(binding.data.texture.handle);
-        GLint tex_slot = glGetUniformLocation(encoder->pipeline->shader_id, binding.label);
-        if (tex_slot == GL_INVALID_VALUE || tex_slot < 0) {
-          WARN("Invalid binding label for texture %s - couldn't fetch texture slot uniform",
-               binding.label);
-        }
-        glUniform1i(tex_slot, binding_i);
-        glActiveTexture(GL_TEXTURE0 + binding_i);
-        glBindTexture(opengl_tex_type(tex->type), tex->id);
-        break;
-      }
-      default:
-        WARN("Unsupported binding kind");
-    }
-  }
-}
-
-void GPU_EncodeSetDefaults(GPU_CmdEncoder* encoder) {}
-
-void GPU_EncodeSetVertexBuffer(GPU_CmdEncoder* encoder, BufferHandle buf) {
-  GPU_Buffer* buffer = BUFFER_GET(buf);
-  if (buffer->vao == 0) {  // if no VAO for this vertex buffer, create it
-    INFO("Setting up VAO");
-    buffer->vao = opengl_bindcreate_vao(buffer, encoder->pipeline->vertex_desc);
-  }
-  glBindVertexArray(buffer->vao);
-}
-void GPU_EncodeSetIndexBuffer(GPU_CmdEncoder* encoder, BufferHandle buf) {
-  GPU_Buffer* buffer = BUFFER_GET(buf);
-  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer->id.ibo);
-}
-void GPU_EncodeDrawTris(GPU_CmdEncoder* encoder, u64 count) {
-  glDrawArrays(GL_TRIANGLES, 0, count);
-}
-void GPU_EncodeDrawIndexedTris(GPU_CmdEncoder* encoder, u64 index_count) {
-  glDrawElements(GL_TRIANGLES, index_count, GL_UNSIGNED_INT, 0);
-}
-
-PUB void GPU_EncodeDraw(GPU_CmdEncoder* encoder, PrimitiveTopology topology, u64 count) {
-  glDrawArrays(opengl_prim_topology(topology), 0, count);
-}
-PUB void GPU_EncodeDrawIndexed(GPU_CmdEncoder* encoder, PrimitiveTopology topology,
-                               u64 index_count) {
-  glDrawElements(opengl_prim_topology(topology), index_count, GL_UNSIGNED_INT, 0);
-}
-
-PUB void GPU_WriteTextureRegion(GPU_CmdEncoder* encoder, TextureHandle dst, u32 x_offset,
-                                u32 y_offset, u32 width, u32 height, const void* data) {
-  CASSERT_MSG(data, "const void* data must not be NULL");
-
-  GPU_Texture* tex = TEXTURE_GET(dst);
-
-  glBindTexture(GL_TEXTURE_2D, tex->id);
-  glTexSubImage2D(GL_TEXTURE_2D, 0, x_offset, y_offset, width, height, GL_RGBA, GL_UNSIGNED_BYTE,
-                  data);
-}
-
-bool GPU_Backend_BeginFrame() {
-  glViewport(0, 0, context.swapchain.dimensions.x * 2, context.swapchain.dimensions.y * 2);
-  glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
-  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-  return true;
-}
-
-void GPU_Backend_EndFrame() { glfwSwapBuffers(context.window); }
-
-#endif