Set up a command list

Kode · Mar 1, 2025 · fa36fea · fa36fea
1 parent caa20ad
commit fa36fea
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Showing 3 changed files with 130 additions and 7 deletions.
diff --git a/backends/gpu/opengl/includes/kore3/opengl/commandlist_structs.h b/backends/gpu/opengl/includes/kore3/opengl/commandlist_structs.h
@@ -18,7 +18,9 @@ typedef struct kore_opengl_buffer_access {
 } kore_opengl_buffer_access;
 
 typedef struct kore_opengl_command_list {
-	int nothing;
+	uint8_t *commands;
+	uint64_t commands_offset;
+	bool presents;
 } kore_opengl_command_list;
 
 #ifdef __cplusplus

diff --git a/backends/gpu/opengl/sources/commandlist.c b/backends/gpu/opengl/sources/commandlist.c
@@ -13,27 +13,105 @@
 
 #include <assert.h>
 
+typedef enum command_type {
+	COMMAND_SET_INDEX_BUFFER,
+	COMMAND_SET_VERTEX_BUFFER,
+	COMMAND_DRAW_INDEXED,
+} command_type;
+
+typedef struct set_index_buffer_data {
+	kore_gpu_buffer *buffer;
+	kore_gpu_index_format index_format;
+	uint64_t offset;
+	uint64_t size;
+} set_index_buffer_data;
+
+typedef struct set_vertex_buffer_data {
+	uint32_t slot;
+	kore_opengl_buffer *buffer;
+	uint64_t offset;
+	uint64_t size;
+	uint64_t stride;
+} set_vertex_buffer_data;
+
+typedef struct draw_indexed_data {
+	uint32_t index_count;
+	uint32_t instance_count;
+	uint32_t first_index;
+	int32_t base_vertex;
+	uint32_t first_instance;
+} draw_indexed_data;
+
+typedef struct command {
+	command_type type;
+	uint32_t size;
+	uint32_t data;
+} command;
+
 void kore_opengl_command_list_destroy(kore_gpu_command_list *list) {}
 
 void kore_opengl_command_list_begin_render_pass(kore_gpu_command_list *list, const kore_gpu_render_pass_parameters *parameters) {}
 
 void kore_opengl_command_list_end_render_pass(kore_gpu_command_list *list) {}
 
-void kore_opengl_command_list_present(kore_gpu_command_list *list) {}
+void kore_opengl_command_list_present(kore_gpu_command_list *list) {
+	list->opengl.presents = true;
+}
 
 void kore_opengl_command_list_set_index_buffer(kore_gpu_command_list *list, kore_gpu_buffer *buffer, kore_gpu_index_format index_format, uint64_t offset,
-                                               uint64_t size) {}
+                                               uint64_t size) {
+	command *c = (command *)&list->opengl.commands[list->opengl.commands_offset];
+
+	c->type = COMMAND_SET_INDEX_BUFFER;
+
+	set_index_buffer_data *data = (set_index_buffer_data *)&c->data;
+	data->buffer = buffer;
+	data->index_format = index_format;
+	data->offset = offset;
+	data->size = size;
+
+	c->size = sizeof(command) - sizeof(c->data) + sizeof(*data);
+	list->opengl.commands_offset += c->size;
+}
 
 void kore_opengl_command_list_set_vertex_buffer(kore_gpu_command_list *list, uint32_t slot, kore_opengl_buffer *buffer, uint64_t offset, uint64_t size,
-                                                uint64_t stride) {}
+                                                uint64_t stride) {
+	command *c = (command *)&list->opengl.commands[list->opengl.commands_offset];
+
+	c->type = COMMAND_SET_VERTEX_BUFFER;
+
+	set_vertex_buffer_data *data = (set_vertex_buffer_data *)&c->data;
+	data->slot = slot;
+	data->buffer = buffer;
+	data->offset = offset;
+	data->size = size;
+	data->stride = stride;
+
+	c->size = sizeof(command) - sizeof(c->data) + sizeof(*data);
+	list->opengl.commands_offset += c->size;
+}
 
 void kore_opengl_command_list_set_render_pipeline(kore_gpu_command_list *list, kore_opengl_render_pipeline *pipeline) {}
 
 void kore_opengl_command_list_draw(kore_gpu_command_list *list, uint32_t vertex_count, uint32_t instance_count, uint32_t first_vertex,
                                    uint32_t first_instance) {}
 
 void kore_opengl_command_list_draw_indexed(kore_gpu_command_list *list, uint32_t index_count, uint32_t instance_count, uint32_t first_index,
-                                           int32_t base_vertex, uint32_t first_instance) {}
+                                           int32_t base_vertex, uint32_t first_instance) {
+	command *c = (command *)&list->opengl.commands[list->opengl.commands_offset];
+
+	c->type = COMMAND_DRAW_INDEXED;
+
+	draw_indexed_data *data = (draw_indexed_data *)&c->data;
+	data->index_count = index_count;
+	data->instance_count = instance_count;
+	data->first_index = first_index;
+	data->base_vertex = base_vertex;
+	data->first_instance = first_instance;
+
+	c->size = sizeof(command) - sizeof(c->data) + sizeof(*data);
+	list->opengl.commands_offset += c->size;
+}
 
 void kore_opengl_command_list_set_descriptor_table(kore_gpu_command_list *list, uint32_t table_index, kore_opengl_descriptor_set *set,
                                                    kore_gpu_buffer **dynamic_buffers, uint32_t *dynamic_offsets, uint32_t *dynamic_sizes) {}

diff --git a/backends/gpu/opengl/sources/device.c b/backends/gpu/opengl/sources/device.c
@@ -24,6 +24,7 @@ static HDC device_context;
 #endif
 
 static GLint framebuffer;
+static GLuint vertex_array;
 
 #if defined(KORE_WINDOWS) && !defined(NDEBUG)
 static void __stdcall debug_callback(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message, const void *userParam) {
@@ -82,6 +83,9 @@ void kore_opengl_device_create(kore_gpu_device *device, const kore_gpu_device_wi
 
 	glGetIntegerv(GL_FRAMEBUFFER_BINDING, &framebuffer);
 #endif
+
+	glGenVertexArrays(1, &vertex_array);
+	glBindVertexArray(vertex_array);
 }
 
 void kore_opengl_device_destroy(kore_gpu_device *device) {}
@@ -106,7 +110,11 @@ void kore_opengl_device_create_buffer(kore_gpu_device *device, const kore_gpu_bu
 	glBindBuffer(buffer->opengl.buffer_type, 0);
 }
 
-void kore_opengl_device_create_command_list(kore_gpu_device *device, kore_gpu_command_list_type type, kore_gpu_command_list *list) {}
+void kore_opengl_device_create_command_list(kore_gpu_device *device, kore_gpu_command_list_type type, kore_gpu_command_list *list) {
+	list->opengl.commands = malloc(1024 * 1024);
+	list->opengl.commands_offset = 0;
+	list->opengl.presents = false;
+}
 
 void kore_opengl_device_create_texture(kore_gpu_device *device, const kore_gpu_texture_parameters *parameters, kore_gpu_texture *texture) {}
 
@@ -119,9 +127,44 @@ kore_gpu_texture_format kore_opengl_device_framebuffer_format(kore_gpu_device *d
 }
 
 void kore_opengl_device_execute_command_list(kore_gpu_device *device, kore_gpu_command_list *list) {
+	kore_gpu_index_format index_format = KORE_GPU_INDEX_FORMAT_UINT16;
+
+	uint64_t offset = 0;
+
+	while (offset < list->opengl.commands_offset) {
+		command *c = (command *)&list->opengl.commands[offset];
+
+		switch (c->type) {
+		case COMMAND_SET_INDEX_BUFFER: {
+			set_index_buffer_data *data = (set_index_buffer_data *)&c->data;
+			index_format = data->index_format;
+			glBindBuffer(data->buffer->opengl.buffer_type, data->buffer->opengl.buffer);
+			break;
+		}
+		case COMMAND_SET_VERTEX_BUFFER: {
+			set_vertex_buffer_data *data = (set_vertex_buffer_data *)&c->data;
+			glBindBuffer(data->buffer->buffer_type, data->buffer->buffer);
+			break;
+		}
+		case COMMAND_DRAW_INDEXED: {
+			draw_indexed_data *data = (draw_indexed_data *)&c->data;
+
+			void *start =
+			    index_format == KORE_GPU_INDEX_FORMAT_UINT16 ? (void *)(data->first_index * sizeof(uint16_t)) : (void *)(data->first_index * sizeof(uint32_t));
+			glDrawElements(GL_TRIANGLES, data->index_count, index_format == KORE_GPU_INDEX_FORMAT_UINT16 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, start);
+		}
+		}
+
+		kore_opengl_check_errors();
+
+		offset += c->size;
+	}
+
+	if (list->opengl.presents) {
 #ifdef KORE_WINDOWS
-	SwapBuffers(device_context);
+		SwapBuffers(device_context);
 #endif
+	}
 }
 
 void kore_opengl_device_wait_until_idle(kore_gpu_device *device) {}