diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend_mtl.m | 263 | ||||
| -rw-r--r-- | src/camera.c | 13 | ||||
| -rw-r--r-- | src/core.c | 51 | ||||
| -rw-r--r-- | src/debug_strings.c | 5 | ||||
| -rw-r--r-- | src/geometry.c | 85 | ||||
| -rw-r--r-- | src/impl.c | 4 | ||||
| -rw-r--r-- | src/log.c | 6 | ||||
| -rw-r--r-- | src/maths.c | 42 | ||||
| -rw-r--r-- | src/mem.c | 88 | ||||
| -rw-r--r-- | src/scene.c | 26 |
10 files changed, 576 insertions, 7 deletions
diff --git a/src/backend_mtl.m b/src/backend_mtl.m new file mode 100644 index 0000000..48e0ab0 --- /dev/null +++ b/src/backend_mtl.m @@ -0,0 +1,263 @@ +#include <celeritas.h> + +#ifdef GPU_METAL + +#define MTL_DEBUG_LAYER 1 // enable all metal validation layers + +// Obj-C imports +#import <Foundation/Foundation.h> +#import <Metal/Metal.h> +#import <MetalKit/MetalKit.h> +#import <QuartzCore/CAMetalLayer.h> +#include <CoreGraphics/CGGeometry.h> + +#define GLFW_INCLUDE_NONE +#import <GLFW/glfw3.h> +#define GLFW_EXPOSE_NATIVE_COCOA +#import <GLFW/glfw3native.h> +#include "stb_image.h" + +NAMESPACED_LOGGER(metal); + +// --- RAL types + +struct gpu_swapchain { + int width, height; + CAMetalLayer* swapchain; +}; + +struct gpu_encoder { + id<MTLCommandBuffer> cmd_buffer; + id<MTLRenderCommandEncoder> cmd_encoder; +}; + +typedef struct metal_pipeline { + id<MTLRenderPipelineState> pso; +} metal_pipeline; + +typedef struct metal_buffer { + id<MTLBuffer> id; +} metal_buffer; + +typedef struct metal_texture { + id<MTLTexture> id; +} metal_texture; + +TYPED_POOL(metal_buffer, buf); +TYPED_POOL(metal_texture, tex); +TYPED_POOL(metal_pipeline, pipeline); + +typedef struct metal_context { + GLFWwindow* window; + NSWindow* metal_window; + + id<MTLDevice> device; + id<CAMetalDrawable> surface; + gpu_swapchain default_swapchain; + id<MTLLibrary> default_library; + + id<MTLCommandQueue> command_queue; + + /* pools */ + buf_pool bufpool; + tex_pool texpool; + pipeline_pool psopool; // pso = pipeline state object +} metal_context; + +static metal_context ctx; + +void ral_backend_init(const char* window_name, struct GLFWwindow* window) { + TRACE("loading Metal backend"); + + TRACE("gpu device creation"); + const id<MTLDevice> gpu = MTLCreateSystemDefaultDevice(); + ctx.device = gpu; + + TRACE("window init"); + glfwMakeContextCurrent(window); + NSWindow* nswindow = glfwGetCocoaWindow(window); + ctx.metal_window = nswindow; + + int width, height; + glfwGetFramebufferSize(window, &width, &height); + + // effectively the "framebuffer" + CAMetalLayer* metal_layer = [CAMetalLayer layer]; + metal_layer.device = gpu; + metal_layer.pixelFormat = MTLPixelFormatBGRA8Unorm; + metal_layer.drawableSize = CGSizeMake(width, height); + ctx.metal_window.contentView.layer = metal_layer; + ctx.metal_window.contentView.wantsLayer = true; + ctx.default_swapchain.swapchain = metal_layer; + + TRACE("command queue creation"); + const id<MTLCommandQueue> queue = [ctx.device newCommandQueue]; + ctx.command_queue = queue; + + TRACE("resource pool init"); + metal_buffer* buffer_storage = malloc(sizeof(metal_buffer) * 100); + ctx.bufpool = buf_pool_create(buffer_storage, 100, sizeof(metal_buffer)); + + metal_texture* texture_storage = malloc(sizeof(metal_texture) * 100); + ctx.texpool = tex_pool_create(texture_storage, 100, sizeof(metal_texture)); + + metal_pipeline* pipeline_storage = malloc(sizeof(metal_pipeline) * 100); + ctx.psopool = pipeline_pool_create(pipeline_storage, 100, sizeof(metal_pipeline)); + + TRACE("create default metal lib"); + NSError* nserr = 0x0; + id<MTLLibrary> default_library = [ctx.device newLibraryWithFile:@"build/shaders/default.metallib" error:&nserr]; + if (!default_library) { + ERROR("Error loading metal lib\n"); + exit(1); + } + ctx.default_library = default_library; + + INFO("Successfully initialised Metal RAL backend"); +} + +void ral_backend_shutdown() { + // no-op +} + +buf_handle ral_buffer_create(u64 size, const void *data) { + buf_handle handle; + metal_buffer* buffer = buf_pool_alloc(&ctx.bufpool, &handle); + buffer->id = [ctx.device newBufferWithBytes:data length:size options:MTLResourceStorageModeShared]; + + return handle; +} + +tex_handle ral_texture_create(texture_desc desc, bool create_view, const void *data) { + tex_handle handle; + metal_texture* texture = tex_pool_alloc(&ctx.texpool, &handle); + + MTLTextureDescriptor* texture_descriptor = [[MTLTextureDescriptor alloc] init]; + [texture_descriptor setPixelFormat:MTLPixelFormatRGBA8Unorm]; + [texture_descriptor setWidth:desc.width]; + [texture_descriptor setHeight:desc.height]; + + texture->id = [ctx.device newTextureWithDescriptor:texture_descriptor]; + + MTLRegion region = MTLRegionMake2D(0, 0, desc.width, desc.height); + u32 bytes_per_row = 4 * desc.width; + + [texture->id replaceRegion:region mipmapLevel:0 withBytes:data bytesPerRow:bytes_per_row]; + + [texture_descriptor release]; + + return handle; +} + +tex_handle ral_texture_load_from_file(const char* filepath) { + texture_desc desc; + + stbi_set_flip_vertically_on_load(true); + unsigned char* image = stbi_load(filepath, &desc.width, &desc.height, &desc.num_channels, STBI_rgb_alpha); + assert(image != NULL); + + tex_handle handle = ral_texture_create(desc, false, image); + stbi_image_free(image); + return handle; +} + +pipeline_handle ral_gfx_pipeline_create(gfx_pipeline_desc desc) { + TRACE("creating graphics pipeline"); + + pipeline_handle handle; + metal_pipeline* p = pipeline_pool_alloc(&ctx.psopool, &handle); + + @autoreleasepool { + // setup vertex and fragment shaders + NSString* vertex_entry_point = [NSString stringWithUTF8String:desc.vertex.entry_point]; + id<MTLFunction> vertex_func = [ctx.default_library newFunctionWithName:vertex_entry_point]; + assert(vertex_func); + + NSString* fragment_entry_point = [NSString stringWithUTF8String:desc.fragment.entry_point]; + id<MTLFunction> fragment_func = [ctx.default_library newFunctionWithName:fragment_entry_point]; + assert(fragment_func); + + NSError* err = 0x0; + MTLRenderPipelineDescriptor* pld = [[MTLRenderPipelineDescriptor alloc] init]; + // in auto release pool so dont need to call release() + + [pld setLabel:@"Pipeline"]; + [pld setVertexFunction:vertex_func]; + [pld setFragmentFunction:fragment_func]; + pld.colorAttachments[0].pixelFormat = MTLPixelFormatBGRA8Unorm; + pld.colorAttachments[0].blendingEnabled = YES; + assert(pld); + + id<MTLRenderPipelineState> pso = [ctx.device newRenderPipelineStateWithDescriptor:pld error:&err]; + assert(pso); + p->pso = pso; + } + + return handle; +} + +gpu_encoder* ral_render_encoder(render_pass_desc rpass_desc) { + id<MTLCommandBuffer> buffer = [ctx.command_queue commandBuffer]; + + // create renderpass descriptor + MTLRenderPassDescriptor* rpd = [[MTLRenderPassDescriptor alloc] init]; + MTLRenderPassColorAttachmentDescriptor* cd = rpd.colorAttachments[0]; + [cd setTexture:ctx.surface.texture]; + [cd setLoadAction:MTLLoadActionClear]; + MTLClearColor clearColor = MTLClearColorMake(41.0f/255.0f, 42.0f/255.0f, 48.0f/255.0f, 1.0); + [cd setClearColor:clearColor]; + [cd setStoreAction:MTLStoreActionStore]; + + id<MTLRenderCommandEncoder> encoder = [buffer renderCommandEncoderWithDescriptor:rpd]; + + gpu_encoder* enc = malloc(sizeof(gpu_encoder)); + enc->cmd_buffer = buffer; + enc->cmd_encoder = encoder; + + return enc; +} + +void ral_encoder_finish_and_submit(gpu_encoder* enc) { + [enc->cmd_encoder endEncoding]; + [enc->cmd_buffer presentDrawable:ctx.surface]; + [enc->cmd_buffer commit]; + [enc->cmd_buffer waitUntilCompleted]; +} + +void ral_encode_bind_pipeline(gpu_encoder *enc, pipeline_handle pipeline) { + metal_pipeline* p = pipeline_pool_get(&ctx.psopool, pipeline); + [enc->cmd_encoder setRenderPipelineState:p->pso]; +} + +void ral_encode_set_vertex_buf(gpu_encoder *enc, buf_handle vbuf) { + metal_buffer* b = buf_pool_get(&ctx.bufpool, vbuf); + [enc->cmd_encoder setVertexBuffer:b->id offset:0 atIndex:0 ]; +} + +void ral_encode_set_texture(gpu_encoder* enc, tex_handle texture, u32 slot) { + metal_texture* t = tex_pool_get(&ctx.texpool, texture); + [enc->cmd_encoder setFragmentTexture:t->id atIndex:slot]; +} + +void ral_encode_draw_tris(gpu_encoder* enc, size_t start, size_t count) { + MTLPrimitiveType tri_primitive = MTLPrimitiveTypeTriangle; + [enc->cmd_encoder drawPrimitives:tri_primitive vertexStart:start vertexCount:count]; +} + +void ral_frame_start() {} + +void ral_frame_draw(scoped_draw_commands draw_fn) { + @autoreleasepool { + ctx.surface = [ctx.default_swapchain.swapchain nextDrawable]; + draw_fn(); + } +} + +void ral_frame_end() {} + +void ral_backend_resize_framebuffer(int width, int height) { + TRACE("resizing framebuffer"); + ctx.default_swapchain.swapchain.drawableSize = CGSizeMake((float)width, (float)height); +} + +#endif
\ No newline at end of file diff --git a/src/camera.c b/src/camera.c new file mode 100644 index 0000000..eb8fc7d --- /dev/null +++ b/src/camera.c @@ -0,0 +1,13 @@ +#include <celeritas.h> + +mat4 camera_view_proj(camera camera, f32 lens_height, f32 lens_width, mat4* out_view, mat4* out_proj) { + mat4 projection_matrix = mat4_perspective(camera.fov, lens_width / lens_height, 0.1, 1000.0); + // TODO: store near/far on camera rather than hard-coding here. + + vec3 camera_direction = vec3_add(camera.position, camera.forwards); + mat4 view_matrix = mat4_look_at(camera.position, camera_direction, camera.up); + if (out_view) *out_view = view_matrix; + if (out_proj) *out_proj = projection_matrix; + + return mat4_mult(view_matrix, projection_matrix); +}
\ No newline at end of file @@ -1,15 +1,58 @@ // The engine "core" #include <celeritas.h> +#include <stdlib.h> +#include "glfw3.h" NAMESPACED_LOGGER(core); -void Core_Bringup(const char* window_name, struct GLFWwindow* optional_window) { - // INFO("Initiate Core bringup"); +core g_core = { 0 }; + +#ifdef GPU_METAL +static const char* gapi = "Metal"; +#else +static const char* gapi = "Vulkan"; +#endif + +// forward declares +void key_callback(GLFWwindow* win, int key, int scancode, int action, int mods); +void resize_callback(GLFWwindow* win, int width, int height); + +void core_bringup(const char* window_name, struct GLFWwindow* optional_window) { INFO("Initiate Core bringup"); INFO("Create GLFW window"); + glfwInit(); + + glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API); + + char* full_window_name = malloc(sizeof(char) * 100); + sprintf(full_window_name, "%s (%s)", window_name, gapi); + + if (optional_window) { + g_core.window = optional_window; + } else { + GLFWwindow* glfw_window = glfwCreateWindow(800, 600, full_window_name, NULL, NULL); + g_core.window = glfw_window; + } + + // This may move into a renderer struct + ral_backend_init(window_name, g_core.window); + + glfwSetKeyCallback(g_core.window, key_callback); + glfwSetFramebufferSizeCallback(g_core.window, resize_callback); +} +void core_shutdown() { + ral_backend_shutdown(); + glfwTerminate(); +} + +bool app_should_exit() { return glfwWindowShouldClose(g_core.window) || g_core.should_exit; } + +void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) { + if (key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE) { + g_core.should_exit = true; + } } -void Core_Shutdown() {} -bool AppShouldExit() { return false; } +void resize_callback(GLFWwindow* window, int width, int height) { ral_backend_resize_framebuffer(width, height); }
\ No newline at end of file diff --git a/src/debug_strings.c b/src/debug_strings.c new file mode 100644 index 0000000..b1e09aa --- /dev/null +++ b/src/debug_strings.c @@ -0,0 +1,5 @@ +#include <celeritas.h> + +const char* keyframe_kind_strings[4] = { "ROTATION", "TRANSLATION", "SCALE", "WEIGHTS" }; + +const char* interpolation_strings[3] = { "Step", "Linear", "Cubic" };
\ No newline at end of file diff --git a/src/geometry.c b/src/geometry.c new file mode 100644 index 0000000..05414d3 --- /dev/null +++ b/src/geometry.c @@ -0,0 +1,85 @@ +#include <celeritas.h> + +typedef struct static_3d_vert { + vec4 pos; + vec4 norm; + vec2 uv; + vec2 pad; +} static_3d_vert; + +vertex_desc static_3d_vertex_format() { + vertex_desc desc; + desc.label = "Static 3D Vertex"; + desc.attributes[0] = ATTR_F32x4; // position + desc.attributes[1] = ATTR_F32x4; // normal + desc.attributes[2] = ATTR_F32x2; // tex coord + desc.attribute_count = 3; + desc.padding = 16; // 16 bytes padding + + return desc; +} + +geometry geo_cuboid(f32 x_scale, f32 y_scale, f32 z_scale) { + vec4 BACK_BOT_LEFT = (vec4){ 0, 0, 0, 0 }; + vec4 BACK_BOT_RIGHT = (vec4){ 1, 0, 0, 0 }; + vec4 BACK_TOP_LEFT = (vec4){ 0, 1, 0, 0 }; + vec4 BACK_TOP_RIGHT = (vec4){ 1, 1, 0, 0 }; + vec4 FRONT_BOT_LEFT = (vec4){ 0, 0, 1, 0 }; + vec4 FRONT_BOT_RIGHT = (vec4){ 1, 0, 1, 0 }; + vec4 FRONT_TOP_LEFT = (vec4){ 0, 1, 1, 0 }; + vec4 FRONT_TOP_RIGHT = (vec4){ 1, 1, 1, 0 }; + + // allocate the data + static_3d_vert* vertices = malloc(36 * 64); + + vertices[0] = (static_3d_vert){ .pos = BACK_TOP_RIGHT, .norm = (v3tov4(VEC3_NEG_Z)), .uv = { 0, 0 } }; + vertices[1] = (static_3d_vert){ .pos = BACK_BOT_LEFT, .norm = v3tov4(VEC3_NEG_Z), .uv = { 0, 1 } }; + vertices[2] = (static_3d_vert){ .pos = BACK_TOP_LEFT, .norm = v3tov4(VEC3_NEG_Z), .uv = { 0, 0 } }; + vertices[3] = (static_3d_vert){ .pos = BACK_TOP_RIGHT, .norm = v3tov4(VEC3_NEG_Z), .uv = { 1, 0 } }; + vertices[4] = (static_3d_vert){ .pos = BACK_BOT_RIGHT, .norm = v3tov4(VEC3_NEG_Z), .uv = { 1, 1 } }; + vertices[5] = (static_3d_vert){ .pos = BACK_BOT_LEFT, .norm = v3tov4(VEC3_NEG_Z), .uv = { 0, 1 } }; + + // front faces + vertices[6] = (static_3d_vert){ .pos = FRONT_BOT_LEFT, .norm = v3tov4(VEC3_Z), .uv = { 0, 1 } }; + vertices[7] = (static_3d_vert){ .pos = FRONT_TOP_RIGHT, .norm = v3tov4(VEC3_Z), .uv = { 1, 0 } }; + vertices[8] = (static_3d_vert){ .pos = FRONT_TOP_LEFT, .norm = v3tov4(VEC3_Z), .uv = { 0, 0 } }; + vertices[9] = (static_3d_vert){ .pos = FRONT_BOT_LEFT, .norm = v3tov4(VEC3_Z), .uv = { 0, 1 } }; + vertices[10] = (static_3d_vert){ .pos = FRONT_BOT_RIGHT, .norm = v3tov4(VEC3_Z), .uv = { 1, 1 } }; + vertices[11] = (static_3d_vert){ .pos = FRONT_TOP_RIGHT, .norm = v3tov4(VEC3_Z), .uv = { 1, 0 } }; + + // top faces + vertices[12] = (static_3d_vert){ .pos = BACK_TOP_LEFT, .norm = v3tov4(VEC3_Y), .uv = { 0, 0 } }; + vertices[13] = (static_3d_vert){ .pos = FRONT_TOP_LEFT, .norm = v3tov4(VEC3_Y), .uv = { 0, 1 } }; + vertices[14] = (static_3d_vert){ .pos = FRONT_TOP_RIGHT, .norm = v3tov4(VEC3_Y), .uv = { 1, 1 } }; + vertices[15] = (static_3d_vert){ .pos = BACK_TOP_LEFT, .norm = v3tov4(VEC3_Y), .uv = { 0, 0 } }; + vertices[16] = (static_3d_vert){ .pos = FRONT_TOP_RIGHT, .norm = v3tov4(VEC3_Y), .uv = { 1, 1 } }; + vertices[17] = (static_3d_vert){ .pos = BACK_TOP_RIGHT, .norm = v3tov4(VEC3_Y), .uv = { 1, 0 } }; + + // bottom faces + vertices[18] = (static_3d_vert){ .pos = BACK_BOT_LEFT, .norm = v3tov4(VEC3_NEG_Y), .uv = { 0, 1 } }; + vertices[19] = (static_3d_vert){ .pos = FRONT_BOT_RIGHT, .norm = v3tov4(VEC3_NEG_Y), .uv = { 1, 1 } }; + vertices[20] = (static_3d_vert){ .pos = FRONT_BOT_LEFT, .norm = v3tov4(VEC3_NEG_Y), .uv = { 0, 1 } }; + vertices[21] = (static_3d_vert){ .pos = BACK_BOT_LEFT, .norm = v3tov4(VEC3_NEG_Y), .uv = { 0, 1 } }; + vertices[22] = (static_3d_vert){ .pos = BACK_BOT_RIGHT, .norm = v3tov4(VEC3_NEG_Y), .uv = { 1, 1 } }; + vertices[23] = (static_3d_vert){ .pos = FRONT_BOT_RIGHT, .norm = v3tov4(VEC3_NEG_Y), .uv = { 0, 1 } }; + + // right faces + vertices[24] = (static_3d_vert){ .pos = FRONT_TOP_RIGHT, .norm = v3tov4(VEC3_X), .uv = { 0, 0 } }; + vertices[25] = (static_3d_vert){ .pos = BACK_BOT_RIGHT, .norm = v3tov4(VEC3_X), .uv = { 1, 1 } }; + vertices[26] = (static_3d_vert){ .pos = BACK_TOP_RIGHT, .norm = v3tov4(VEC3_X), .uv = { 1, 0 } }; + vertices[27] = (static_3d_vert){ .pos = BACK_BOT_RIGHT, .norm = v3tov4(VEC3_X), .uv = { 1, 1 } }; + vertices[28] = (static_3d_vert){ .pos = FRONT_TOP_RIGHT, .norm = v3tov4(VEC3_X), .uv = { 0, 0 } }; + vertices[29] = (static_3d_vert){ .pos = FRONT_BOT_RIGHT, .norm = v3tov4(VEC3_X), .uv = { 0, 1 } }; + + // left faces + vertices[30] = (static_3d_vert){ .pos = FRONT_TOP_LEFT, .norm = v3tov4(VEC3_NEG_X), .uv = { 0, 0 } }; + vertices[31] = (static_3d_vert){ .pos = BACK_TOP_LEFT, .norm = v3tov4(VEC3_NEG_X), .uv = { 0, 0 } }; + vertices[32] = (static_3d_vert){ .pos = BACK_BOT_LEFT, .norm = v3tov4(VEC3_NEG_X), .uv = { 0, 0 } }; + vertices[33] = (static_3d_vert){ .pos = BACK_BOT_LEFT, .norm = v3tov4(VEC3_NEG_X), .uv = { 0, 0 } }; + vertices[34] = (static_3d_vert){ .pos = FRONT_BOT_LEFT, .norm = v3tov4(VEC3_NEG_X), .uv = { 0, 0 } }; + vertices[35] = (static_3d_vert){ .pos = FRONT_TOP_LEFT, .norm = v3tov4(VEC3_NEG_X), .uv = { 0, 0 } }; + + return (geometry){ + .vertex_format = static_3d_vertex_format(), .vertex_data = vertices, .has_indices = false, .indices = NULL + }; +}
\ No newline at end of file diff --git a/src/impl.c b/src/impl.c new file mode 100644 index 0000000..18f2549 --- /dev/null +++ b/src/impl.c @@ -0,0 +1,4 @@ +// For pulling in implementation files of single-header libraries + +#define STB_IMAGE_IMPLEMENTATION +#include "stb_image.h"
\ No newline at end of file @@ -1,7 +1,9 @@ #include <celeritas.h> -void log_output(char* module, LogLevel level, const char* message, ...) { +static const char* log_level_strings[] = { "FATAL", "ERROR", "WARN", "INFO", "DEBUG", "TRACE" }; + +void log_output(char* module, loglevel level, const char* message, ...) { char out_msg[4096]; - printf("Msg: %s\n", message); + printf("[%s] %s - %s\n", module, log_level_strings[level], message); } diff --git a/src/maths.c b/src/maths.c index 3ad1e2e..c1fab2a 100644 --- a/src/maths.c +++ b/src/maths.c @@ -1,3 +1,43 @@ #include <celeritas.h> -Vec3 Vec3_Create(f32 x, f32 y, f32 z) { return (Vec3){ x, y, z }; } +vec3 vec3_create(f32 x, f32 y, f32 z) { return (vec3){ x, y, z }; } + +vec3 vec3_add(vec3 u, vec3 v) { return (vec3){ .x = u.x + v.x, .y = u.y + v.y, .z = u.z + v.z }; } + +vec4 vec4_create(f32 x, f32 y, f32 z, f32 w) { return (vec4){ x, y, z, w }; } + +mat4 mat4_ident() { return (mat4){ .data = { 1.0, 0., 0., 0., 0., 1., 0., 0., 0., 0., 1., 0., 0., 0., 0., 1.0 } }; } + +mat4 mat4_mult(mat4 lhs, mat4 rhs) { + mat4 out_matrix = mat4_ident(); + + const f32* m1_ptr = lhs.data; + const f32* m2_ptr = rhs.data; + f32* dst_ptr = out_matrix.data; + + for (i32 i = 0; i < 4; ++i) { + for (i32 j = 0; j < 4; ++j) { + *dst_ptr = m1_ptr[0] * m2_ptr[0 + j] + m1_ptr[1] * m2_ptr[4 + j] + m1_ptr[2] * m2_ptr[8 + j] + + m1_ptr[3] * m2_ptr[12 + j]; + dst_ptr++; + } + m1_ptr += 4; + } + + return out_matrix; +} + +mat4 mat4_perspective(f32 fov_radians, f32 aspect_ratio, f32 near_z, f32 far_z) { + f32 half_tan_fov = tanf(fov_radians * 0.5f); + mat4 out_matrix = { .data = { 0 } }; + out_matrix.data[0] = 1.0f / (aspect_ratio * half_tan_fov); + out_matrix.data[5] = 1.0f / half_tan_fov; + out_matrix.data[10] = -((far_z + near_z) / (far_z - near_z)); + out_matrix.data[11] = -1.0f; + out_matrix.data[14] = -((2.0f * far_z * near_z) / (far_z - near_z)); + return out_matrix; +} + +mat4 mat4_look_at(vec3 position, vec3 target, vec3 up) { + // TODO +}
\ No newline at end of file @@ -0,0 +1,88 @@ +#include <celeritas.h> + +void_pool void_pool_create(void* storage, const char* debug_label, u64 capacity, u64 entry_size) { + size_t _memory_requirements = capacity * entry_size; + // void* backing_buf = arena_alloc(a, memory_requirements); + + assert(entry_size >= sizeof(void_pool_header)); // TODO: create my own assert with error message + + void_pool pool = { .capacity = capacity, + .entry_size = entry_size, + .count = 0, + .backing_buffer = storage, + .free_list_head = NULL, + .debug_label = debug_label }; + + void_pool_free_all(&pool); + + return pool; +} + +void void_pool_free_all(void_pool* pool) { + // set all entries to be free + for (u64 i = 0; i < pool->capacity; i++) { + void* ptr = &pool->backing_buffer[i * pool->entry_size]; + void_pool_header* free_node = (void_pool_header*)ptr; // we reuse the actual entry itself to hold the header + if (i == (pool->capacity - 1)) { + // if the last one we make its next pointer NULL indicating its full + free_node->next = NULL; + } + free_node->next = pool->free_list_head; + // now the head points to this entry + pool->free_list_head = free_node; + } +} + +void* void_pool_get(void_pool* pool, u32 raw_handle) { + // An handle is an index into the array essentially + void* ptr = pool->backing_buffer + (raw_handle * pool->entry_size); + return ptr; +} + +void* void_pool_alloc(void_pool* pool, u32* out_raw_handle) { + // get the next free node + if (pool->count == pool->capacity) { + // WARN("Pool is full!"); + return NULL; + } + if (pool->free_list_head == NULL) { + // ERROR("%s Pool is full (head = null)", pool->debug_label); + return NULL; + } + void_pool_header* free_node = pool->free_list_head; + + // What index does this become? + uintptr_t start = (uintptr_t)pool->backing_buffer; + uintptr_t cur = (uintptr_t)free_node; + // TRACE("%ld %ld ", start, cur); + assert(cur > start); + u32 index = (u32)((cur - start) / pool->entry_size); + /* printf("Index %d\n", index); */ + if (out_raw_handle != NULL) { + *out_raw_handle = index; + } + + pool->free_list_head = free_node->next; + + memset(free_node, 0, pool->entry_size); + pool->count++; + return (void*)free_node; +} + +void void_pool_dealloc(void_pool* pool, u32 raw_handle) { + // push free node back onto the free list + void* ptr = void_pool_get(pool, raw_handle); + void_pool_header* freed_node = (void_pool_header*)ptr; + + freed_node->next = pool->free_list_head; + pool->free_list_head = freed_node; + + pool->count--; +} + +u32 void_pool_insert(void_pool* pool, void* item) { + u32 raw_handle; + void* item_dest = void_pool_alloc(pool, &raw_handle); + memcpy(item_dest, item, pool->entry_size); + return raw_handle; +} diff --git a/src/scene.c b/src/scene.c new file mode 100644 index 0000000..26e19dc --- /dev/null +++ b/src/scene.c @@ -0,0 +1,26 @@ +/** + * @file scene.c + * @author your name (you@domain.com) + * @brief + * @version 0.1 + * @date 2024-10-18 + * + * @copyright Copyright (c) 2024 + * + */ +#include <celeritas.h> + +// Retained mode scene tree that handles performant transform propagation, and allows systems, or other languages via +// bindings, to manipulate rendering/scene data without *owning* said data. + +typedef struct scene_tree_node { + const char* label; +} scene_tree_node; + +DEFINE_HANDLE(scene_node_handle); +TYPED_POOL(scene_tree_node, scene_node); + +typedef struct render_scene_tree { +} render_scene_tree; + +// What kind of operations and mutations can we perform on the tree? |