130 lines
3.5 KiB
C++
130 lines
3.5 KiB
C++
#include "../VTImage.hpp"
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#include "VxMath.hpp"
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namespace LibCmo::VxMath {
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#pragma region Structure copying
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void VxFillStructure(CKDWORD Count, void* Dst, CKDWORD Stride, CKDWORD SizeSrc, const void* Src) {
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VxCopyStructure(Count, Dst, Stride, SizeSrc, Src, SizeSrc);
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}
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void VxCopyStructure(CKDWORD Count, void* Dst, CKDWORD OutStride, CKDWORD SizeSrc, const void* Src, CKDWORD InStride) {
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if (Dst == nullptr || Src == nullptr) return;
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CKBYTE* cdst = static_cast<CKBYTE*>(Dst);
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const CKBYTE* csrc = static_cast<const CKBYTE*>(Src);
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for (CKDWORD i = 0; i < Count; ++i) {
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std::memcpy(cdst, csrc, SizeSrc);
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cdst += OutStride;
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csrc += InStride;
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}
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}
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#pragma endregion
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#pragma region Graphic Utilities
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void VxDoBlit(const VxImageDescEx* origin, VxImageDescEx* dst) {
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if (dst == nullptr || origin == nullptr) return;
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if (!dst->IsValid() || !origin->IsValid()) return;
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// if have same size, directly copy it
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if (dst->IsHWEqual(*origin)) {
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std::memcpy(dst->GetMutableImage(), origin->GetImage(), dst->GetImageSize());
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return;
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}
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// perform resize by stb
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stbir_resize(
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origin->GetImage(), static_cast<int>(origin->GetWidth()), static_cast<int>(origin->GetHeight()), 0,
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dst->GetMutableImage(), static_cast<int>(dst->GetWidth()), static_cast<int>(dst->GetHeight()), 0,
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STBIR_TYPE_UINT8, 4, STBIR_ALPHA_CHANNEL_NONE, 0, // no alpha channel, mean we treat alpha channel as a normal color factor.
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STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP,
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STBIR_FILTER_BOX, STBIR_FILTER_BOX,
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STBIR_COLORSPACE_SRGB, nullptr
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);
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}
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void VxDoBlitUpsideDown(const VxImageDescEx* origin, VxImageDescEx* dst) {
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if (dst == nullptr || origin == nullptr) return;
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if (!dst->IsValid() || !origin->IsValid()) return;
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// if size is not matched, return
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if (!dst->IsHWEqual(*origin)) {
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return;
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}
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// copy and swap data by line
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CKDWORD height = dst->GetHeight(),
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rowsize = VxImageDescEx::PixelSize * dst->GetWidth();
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for (CKDWORD row = 0; row < height; ++row) {
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std::memcpy(
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dst->GetMutableImage() + (row * rowsize),
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origin->GetImage() + ((height - row - 1) * rowsize),
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rowsize
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);
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}
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}
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CKDWORD VxGetBitCount(CKDWORD dwMask) {
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if (dwMask == 0u) return 0;
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dwMask >>= VxGetBitShift(dwMask);
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CKDWORD count = 0;
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while ((dwMask & 1u) == 0u) {
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dwMask >>= 1u;
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++count;
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}
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return count;
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}
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CKDWORD VxGetBitShift(CKDWORD dwMask) {
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if (dwMask == 0u) return 0;
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CKDWORD count = 0;
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while ((dwMask & 1u) != 0u) {
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dwMask >>= 1u;
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++count;
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}
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return count;
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}
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//CKDWORD VxScaleFactor(CKDWORD val, CKDWORD srcBitCount, CKDWORD dstBitCount) {
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// if (srcBitCount == dstBitCount) return val;
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// if (srcBitCount > dstBitCount) {
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// return val >> (srcBitCount - dstBitCount);
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// } else {
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// return val << (dstBitCount - srcBitCount);
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// }
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//}
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void VxDoAlphaBlit(VxImageDescEx* dst_desc, CKBYTE AlphaValue) {
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if (dst_desc == nullptr) return;
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CKDWORD* pixels = dst_desc->GetMutablePixels();
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CKDWORD pixelcount = dst_desc->GetPixelCount();
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for (CKDWORD i = 0; i < pixelcount; ++i) {
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*pixels = (*pixels) & 0x00FFFFFF | (static_cast<CKDWORD>(AlphaValue) << 24);
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++pixels;
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}
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}
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void VxDoAlphaBlit(VxImageDescEx* dst_desc, CKBYTE* AlphaValues) {
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if (dst_desc == nullptr) return;
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CKDWORD* pixels = dst_desc->GetMutablePixels();
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CKDWORD pixelcount = dst_desc->GetPixelCount();
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for (CKDWORD i = 0; i < pixelcount; ++i) {
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*pixels = (*pixels) & 0x00FFFFFF | (static_cast<CKDWORD>(*AlphaValues) << 24);
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++pixels;
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++AlphaValues;
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}
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}
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#pragma endregion
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}
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