74 lines
2.5 KiB
Objective-C
74 lines
2.5 KiB
Objective-C
#include <kinc/graphics5/graphics.h>
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#include <kinc/graphics5/indexbuffer.h>
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#import <Metal/Metal.h>
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id getMetalDevice(void);
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void kinc_g5_index_buffer_init(kinc_g5_index_buffer_t *buffer, int indexCount, kinc_g5_index_buffer_format_t format, bool gpuMemory) {
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buffer->impl.count = indexCount;
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buffer->impl.gpu_memory = gpuMemory;
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buffer->impl.format = format;
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buffer->impl.last_start = 0;
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buffer->impl.last_count = indexCount;
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id<MTLDevice> device = getMetalDevice();
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MTLResourceOptions options = MTLResourceCPUCacheModeWriteCombined;
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#ifdef KINC_APPLE_SOC
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options |= MTLResourceStorageModeShared;
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#else
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if (gpuMemory) {
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options |= MTLResourceStorageModeManaged;
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}
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else {
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options |= MTLResourceStorageModeShared;
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}
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#endif
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buffer->impl.metal_buffer = (__bridge_retained void *)[device
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newBufferWithLength:(format == KINC_G5_INDEX_BUFFER_FORMAT_16BIT ? sizeof(uint16_t) * indexCount : sizeof(uint32_t) * indexCount)
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options:options];
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}
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void kinc_g5_index_buffer_destroy(kinc_g5_index_buffer_t *buffer) {
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id<MTLBuffer> buf = (__bridge_transfer id<MTLBuffer>)buffer->impl.metal_buffer;
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buf = nil;
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buffer->impl.metal_buffer = NULL;
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}
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static int kinc_g5_internal_index_buffer_stride(kinc_g5_index_buffer_t *buffer) {
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return buffer->impl.format == KINC_G5_INDEX_BUFFER_FORMAT_16BIT ? 2 : 4;
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}
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void *kinc_g5_index_buffer_lock_all(kinc_g5_index_buffer_t *buffer) {
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return kinc_g5_index_buffer_lock(buffer, 0, kinc_g5_index_buffer_count(buffer));
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}
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void *kinc_g5_index_buffer_lock(kinc_g5_index_buffer_t *buffer, int start, int count) {
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buffer->impl.last_start = start;
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buffer->impl.last_count = count;
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id<MTLBuffer> metal_buffer = (__bridge id<MTLBuffer>)buffer->impl.metal_buffer;
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uint8_t *data = (uint8_t *)[metal_buffer contents];
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return &data[start * kinc_g5_internal_index_buffer_stride(buffer)];
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}
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void kinc_g5_index_buffer_unlock_all(kinc_g5_index_buffer_t *buffer) {
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kinc_g5_index_buffer_unlock(buffer, buffer->impl.last_count);
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}
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void kinc_g5_index_buffer_unlock(kinc_g5_index_buffer_t *buffer, int count) {
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#ifndef KINC_APPLE_SOC
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if (buffer->impl.gpu_memory) {
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id<MTLBuffer> metal_buffer = (__bridge id<MTLBuffer>)buffer->impl.metal_buffer;
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NSRange range;
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range.location = buffer->impl.last_start * kinc_g5_internal_index_buffer_stride(buffer);
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range.length = count * kinc_g5_internal_index_buffer_stride(buffer);
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[metal_buffer didModifyRange:range];
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}
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#endif
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}
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int kinc_g5_index_buffer_count(kinc_g5_index_buffer_t *buffer) {
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return buffer->impl.count;
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}
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