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103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
#pragma once
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#include <inttypes.h>
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#include <cstring>
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#ifdef _M_SSE
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#include <emmintrin.h>>
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#endif
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// Utilities useful for filling in std140-layout uniform buffers, and similar.
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// LSBs in f[0], etc.
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// Could be SSE optimized.
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inline void Uint8x4ToFloat4(float f[4], uint32_t u) {
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f[0] = ((u >> 0) & 0xFF) * (1.0f / 255.0f);
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f[1] = ((u >> 8) & 0xFF) * (1.0f / 255.0f);
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f[2] = ((u >> 16) & 0xFF) * (1.0f / 255.0f);
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f[3] = ((u >> 24) & 0xFF) * (1.0f / 255.0f);
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}
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inline void Uint8x3ToFloat4(float f[4], uint32_t u) {
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f[0] = ((u >> 0) & 0xFF) * (1.0f / 255.0f);
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f[1] = ((u >> 8) & 0xFF) * (1.0f / 255.0f);
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f[2] = ((u >> 16) & 0xFF) * (1.0f / 255.0f);
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f[3] = 0.0f;
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}
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inline void Uint8x3ToInt4(int i[4], uint32_t u) {
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i[0] = ((u >> 0) & 0xFF);
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i[1] = ((u >> 8) & 0xFF);
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i[2] = ((u >> 16) & 0xFF);
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i[3] = 0;
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}
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inline void Uint8x3ToInt4_Alpha(int i[4], uint32_t u, uint8_t alpha) {
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i[0] = ((u >> 0) & 0xFF);
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i[1] = ((u >> 8) & 0xFF);
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i[2] = ((u >> 16) & 0xFF);
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i[3] = alpha;
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}
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inline void Uint8x3ToFloat4_Alpha(float f[4], uint32_t u, float alpha) {
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f[0] = ((u >> 0) & 0xFF) * (1.0f / 255.0f);
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f[1] = ((u >> 8) & 0xFF) * (1.0f / 255.0f);
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f[2] = ((u >> 16) & 0xFF) * (1.0f / 255.0f);
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f[3] = alpha;
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}
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inline void Uint8x3ToFloat4_AlphaUint8(float f[4], uint32_t u, uint8_t alpha) {
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f[0] = ((u >> 0) & 0xFF) * (1.0f / 255.0f);
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f[1] = ((u >> 8) & 0xFF) * (1.0f / 255.0f);
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f[2] = ((u >> 16) & 0xFF) * (1.0f / 255.0f);
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f[3] = alpha * (1.0f / 255.0f);
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}
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inline void Uint8x1ToFloat4(float f[4], uint32_t u) {
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f[0] = ((u >> 0) & 0xFF) * (1.0f / 255.0f);
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f[1] = 0.0f;
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f[2] = 0.0f;
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f[3] = 0.0f;
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}
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// These are just for readability.
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inline void CopyFloat2(float dest[2], const float src[2]) {
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memcpy(dest, src, sizeof(float) * 2);
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}
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inline void CopyFloat3(float dest[3], const float src[3]) {
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memcpy(dest, src, sizeof(float) * 3);
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}
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inline void CopyFloat1To4(float dest[4], const float src) {
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dest[0] = src;
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dest[1] = 0.0f;
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dest[2] = 0.0f;
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dest[3] = 0.0f;
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}
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inline void CopyFloat2To4(float dest[4], const float src[2]) {
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memcpy(dest, src, sizeof(float) * 2);
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dest[2] = 0.0f;
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dest[3] = 0.0f;
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}
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inline void CopyFloat3To4(float dest[4], const float src[3]) {
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memcpy(dest, src, sizeof(float) * 3);
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dest[3] = 0.0f;
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}
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inline void CopyFloat4(float dest[4], const float src[4]) {
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memcpy(dest, src, sizeof(float) * 4);
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}
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inline void CopyMatrix4x4(float dest[16], const float src[16]) {
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memcpy(dest, src, sizeof(float) * 16);
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}
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inline void ExpandFloat24x3ToFloat4(float dest[4], uint32_t src[3]) {
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uint32_t temp[4] = { src[0] << 8, src[1] << 8, src[2] << 8, 0 };
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memcpy(dest, temp, sizeof(float) * 4);
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}
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