/**************************************************************************/
/*  rendering_context_driver_metal.mm                                     */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
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/**************************************************************************/

#import "rendering_context_driver_metal.h"

@protocol MTLDeviceEx <MTLDevice>
#if TARGET_OS_OSX && __MAC_OS_X_VERSION_MAX_ALLOWED < 130300
- (void)setShouldMaximizeConcurrentCompilation:(BOOL)v;
#endif
@end

RenderingContextDriverMetal::RenderingContextDriverMetal() {
}

RenderingContextDriverMetal::~RenderingContextDriverMetal() {
}

Error RenderingContextDriverMetal::initialize() {
	metal_device = MTLCreateSystemDefaultDevice();
#if TARGET_OS_OSX
	if (@available(macOS 13.3, *)) {
		[id<MTLDeviceEx>(metal_device) setShouldMaximizeConcurrentCompilation:YES];
	}
#endif
	device.type = DEVICE_TYPE_INTEGRATED_GPU;
	device.vendor = VENDOR_APPLE;
	device.workarounds = Workarounds();

	MetalDeviceProperties props(metal_device);
	int version = (int)props.features.highestFamily - (int)MTLGPUFamilyApple1 + 1;
	device.name = vformat("%s (Apple%d)", metal_device.name.UTF8String, version);

	return OK;
}

const RenderingContextDriver::Device &RenderingContextDriverMetal::device_get(uint32_t p_device_index) const {
	DEV_ASSERT(p_device_index < 1);
	return device;
}

uint32_t RenderingContextDriverMetal::device_get_count() const {
	return 1;
}

RenderingDeviceDriver *RenderingContextDriverMetal::driver_create() {
	return memnew(RenderingDeviceDriverMetal(this));
}

void RenderingContextDriverMetal::driver_free(RenderingDeviceDriver *p_driver) {
	memdelete(p_driver);
}

RenderingContextDriver::SurfaceID RenderingContextDriverMetal::surface_create(const void *p_platform_data) {
	const WindowPlatformData *wpd = (const WindowPlatformData *)(p_platform_data);
	Surface *surface = memnew(SurfaceLayer(wpd->layer, metal_device));

	return SurfaceID(surface);
}

void RenderingContextDriverMetal::surface_set_size(SurfaceID p_surface, uint32_t p_width, uint32_t p_height) {
	Surface *surface = (Surface *)(p_surface);
	if (surface->width == p_width && surface->height == p_height) {
		return;
	}
	surface->width = p_width;
	surface->height = p_height;
	surface->needs_resize = true;
}

void RenderingContextDriverMetal::surface_set_vsync_mode(SurfaceID p_surface, DisplayServer::VSyncMode p_vsync_mode) {
	Surface *surface = (Surface *)(p_surface);
	if (surface->vsync_mode == p_vsync_mode) {
		return;
	}
	surface->vsync_mode = p_vsync_mode;
	surface->needs_resize = true;
}

DisplayServer::VSyncMode RenderingContextDriverMetal::surface_get_vsync_mode(SurfaceID p_surface) const {
	Surface *surface = (Surface *)(p_surface);
	return surface->vsync_mode;
}

uint32_t RenderingContextDriverMetal::surface_get_width(SurfaceID p_surface) const {
	Surface *surface = (Surface *)(p_surface);
	return surface->width;
}

uint32_t RenderingContextDriverMetal::surface_get_height(SurfaceID p_surface) const {
	Surface *surface = (Surface *)(p_surface);
	return surface->height;
}

void RenderingContextDriverMetal::surface_set_needs_resize(SurfaceID p_surface, bool p_needs_resize) {
	Surface *surface = (Surface *)(p_surface);
	surface->needs_resize = p_needs_resize;
}

bool RenderingContextDriverMetal::surface_get_needs_resize(SurfaceID p_surface) const {
	Surface *surface = (Surface *)(p_surface);
	return surface->needs_resize;
}

void RenderingContextDriverMetal::surface_destroy(SurfaceID p_surface) {
	Surface *surface = (Surface *)(p_surface);
	memdelete(surface);
}