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metal buffer API

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This commit is contained in:
Greg Wells
2025-06-06 17:08:24 -04:00
parent 73fd05e786
commit f425dfc20b
2 changed files with 48 additions and 0 deletions
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7
rendering_api/metal/src/core/buffer/metal_buffer.h Normal file
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#pragma once
#import <Metal/Metal.h>
struct gnPlatformBuffer_t {
id<MTLBuffer> buffer, stagingBuffer;
bool useStagingBuffer;
};

41
rendering_api/metal/src/core/buffer/metal_buffer.m Normal file
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#include "metal_buffer.h"
#include "core/buffers/gryphn_buffer.h"
#include "core/output_device/gryphn_output_device.h"
#include "core/devices/metal_output_devices.h"
gnReturnCode gnCreateBufferFn(gnBufferHandle buffer, gnOutputDeviceHandle device, gnBufferInfo info) {
buffer->buffer = malloc(sizeof(struct gnPlatformBuffer_t));
MTLResourceOptions option;
buffer->buffer->useStagingBuffer = (info.usage == GN_DYNAMIC_DRAW) ? NO : YES;
if (info.usage == GN_DYNAMIC_DRAW)
option = MTLResourceStorageModeShared;
else {
option = MTLResourceStorageModePrivate;
buffer->buffer->stagingBuffer = [device->outputDevice->device newBufferWithLength:info.size options:MTLResourceStorageModeShared];
}
buffer->buffer->buffer = [device->outputDevice->device newBufferWithLength:info.size options:option];
return GN_SUCCESS;
}
void gnBufferDataFn(gnBufferHandle buffer, size_t dataSize, void* data) {
void* bufferData;
if (buffer->buffer->useStagingBuffer) {
memcpy(buffer->buffer->stagingBuffer.contents, data, dataSize);
id<MTLCommandBuffer> commandBuffer = [buffer->device->outputDevice->transferQueue commandBuffer];
id<MTLBlitCommandEncoder> encoder = [commandBuffer blitCommandEncoder];
[encoder copyFromBuffer:buffer->buffer->stagingBuffer sourceOffset:0 toBuffer:buffer->buffer->buffer destinationOffset:0 size:dataSize];
[encoder endEncoding];
[commandBuffer commit];
[commandBuffer waitUntilCompleted];
} else
memcpy(buffer->buffer->buffer.contents, data, dataSize);
}
void gnDestroyBufferFn(gnBufferHandle buffer) {
// if (buffer->buffer->useStagingBuffer == gnTrue) {
// vkDestroyBuffer(buffer->device->outputDevice->device, buffer->buffer->stagingBuffer, NULL);
// vkFreeMemory(buffer->device->outputDevice->device, buffer->buffer->stagingBufferMemory, NULL);
// }
// vkDestroyBuffer(buffer->device->outputDevice->device, buffer->buffer->buffer, NULL);
// vkFreeMemory(buffer->device->outputDevice->device, buffer->buffer->bufferMemory, NULL);
// free(buffer->buffer);
}