103 lines
2.4 KiB
Objective-C
103 lines
2.4 KiB
Objective-C
//
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// RendererCommon.m
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// MetalRenderer
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//
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// Created by Stuart Carnie on 6/3/18.
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// Copyright © 2018 Stuart Carnie. All rights reserved.
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//
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#import "RendererCommon.h"
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#import <Metal/Metal.h>
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NSUInteger RPixelFormatToBPP(RPixelFormat format)
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{
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switch (format)
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{
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case RPixelFormatBGRA8Unorm:
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case RPixelFormatBGRX8Unorm:
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return 4;
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case RPixelFormatB5G6R5Unorm:
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case RPixelFormatBGRA4Unorm:
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return 2;
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default:
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RARCH_ERR("[Metal]: unknown RPixel format: %d\n", format);
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return 4;
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}
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}
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static NSString *RPixelStrings[RPixelFormatCount];
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NSString *NSStringFromRPixelFormat(RPixelFormat format)
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{
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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#define STRING(literal) RPixelStrings[literal] = @#literal
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STRING(RPixelFormatInvalid);
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STRING(RPixelFormatB5G6R5Unorm);
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STRING(RPixelFormatBGRA4Unorm);
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STRING(RPixelFormatBGRA8Unorm);
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STRING(RPixelFormatBGRX8Unorm);
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#undef STRING
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});
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if (format >= RPixelFormatCount)
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{
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format = RPixelFormatInvalid;
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}
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return RPixelStrings[format];
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}
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matrix_float4x4 make_matrix_float4x4(const float *v)
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{
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simd_float4 P = simd_make_float4(v[0], v[1], v[2], v[3]);
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v += 4;
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simd_float4 Q = simd_make_float4(v[0], v[1], v[2], v[3]);
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v += 4;
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simd_float4 R = simd_make_float4(v[0], v[1], v[2], v[3]);
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v += 4;
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simd_float4 S = simd_make_float4(v[0], v[1], v[2], v[3]);
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matrix_float4x4 mat = {P, Q, R, S};
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return mat;
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}
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matrix_float4x4 matrix_proj_ortho(float left, float right, float top, float bottom)
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{
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float near = 0;
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float far = 1;
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float sx = 2 / (right - left);
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float sy = 2 / (top - bottom);
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float sz = 1 / (far - near);
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float tx = (right + left) / (left - right);
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float ty = (top + bottom) / (bottom - top);
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float tz = near / (far - near);
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simd_float4 P = simd_make_float4(sx, 0, 0, 0);
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simd_float4 Q = simd_make_float4(0, sy, 0, 0);
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simd_float4 R = simd_make_float4(0, 0, sz, 0);
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simd_float4 S = simd_make_float4(tx, ty, tz, 1);
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matrix_float4x4 mat = {P, Q, R, S};
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return mat;
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}
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matrix_float4x4 matrix_rotate_z(float rot)
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{
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float cz, sz;
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__sincosf(rot, &sz, &cz);
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simd_float4 P = simd_make_float4(cz, -sz, 0, 0);
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simd_float4 Q = simd_make_float4(sz, cz, 0, 0);
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simd_float4 R = simd_make_float4( 0, 0, 1, 0);
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simd_float4 S = simd_make_float4( 0, 0, 0, 1);
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matrix_float4x4 mat = {P, Q, R, S};
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return mat;
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}
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