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create multisampled textures in metal

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This commit is contained in:
Greg Wells
2025-07-05 19:16:49 -04:00
parent d54273b2cb
commit c3ea545c99
2 changed files with 23 additions and 0 deletions
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16
projects/apis/metal/src/texture/metal_texture.m
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@@ -2,6 +2,17 @@
#include "surface/metal_surface.h"
#include "devices/metal_output_devices.h"
NSUInteger mtlSampleCount(gnMultisampleCountFlags flags) {
if ((flags & GN_SAMPLE_BIT_64) == GN_SAMPLE_BIT_64) { return 64; }
if ((flags & GN_SAMPLE_BIT_32) == GN_SAMPLE_BIT_32) { return 32; }
if ((flags & GN_SAMPLE_BIT_16) == GN_SAMPLE_BIT_16) { return 16; }
if ((flags & GN_SAMPLE_BIT_8) == GN_SAMPLE_BIT_8) { return 8; }
if ((flags & GN_SAMPLE_BIT_4) == GN_SAMPLE_BIT_4) { return 4; }
if ((flags & GN_SAMPLE_BIT_2) == GN_SAMPLE_BIT_2) { return 2; }
if ((flags & GN_SAMPLE_BIT_1) == GN_SAMPLE_BIT_1) { return 1; }
return 0;
}
gnReturnCode createMetalTexture(gnTexture texture, gnDevice device, const gnTextureInfo info) {
texture->texture = malloc(sizeof(struct gnPlatformTexture_t));
MTLTextureDescriptor *textureDescriptor = [[MTLTextureDescriptor alloc] init];
@@ -9,6 +20,11 @@ gnReturnCode createMetalTexture(gnTexture texture, gnDevice device, const gnText
textureDescriptor.width = info.extent.width;
textureDescriptor.height = info.extent.height;
textureDescriptor.depth = info.extent.depth;
textureDescriptor.sampleCount = mtlSampleCount(info.samples);
if (textureDescriptor.sampleCount >= 2)
textureDescriptor.textureType = MTLTextureType2DMultisample;
else
textureDescriptor.textureType = MTLTextureType2D;
texture->texture->texture = [device->outputDevice->device newTextureWithDescriptor:textureDescriptor];
[textureDescriptor release];