154 lines
4.6 KiB
C++
154 lines
4.6 KiB
C++
#include "VxMath.hpp"
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#include "stb_image.h"
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#include "stb_image_resize.h"
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namespace LibCmo::VxMath {
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#pragma region Structure copying
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void VxFillStructure(CK2::CKDWORD Count, void* Dst, CK2::CKDWORD Stride, CK2::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(CK2::CKDWORD Count, void* Dst, CK2::CKDWORD OutStride, CK2::CKDWORD SizeSrc, const void* Src, CK2::CKDWORD InStride) {
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if (Dst == nullptr || Src == nullptr) return;
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char* cdst = reinterpret_cast<char*>(Dst);
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const char* csrc = reinterpret_cast<const char*>(Src);
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for (CK2::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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CK2::CKDWORD height = dst->GetHeight(),
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rowsize = VxImageDescEx::PixelSize * dst->GetWidth();
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for (CK2::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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CK2::CKDWORD VxGetBitCount(CK2::CKDWORD dwMask) {
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if (dwMask == 0u) return 0;
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dwMask >>= VxGetBitShift(dwMask);
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CK2::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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CK2::CKDWORD VxGetBitShift(CK2::CKDWORD dwMask) {
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if (dwMask == 0u) return 0;
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CK2::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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//CK2::CKDWORD VxScaleFactor(CK2::CKDWORD val, CK2::CKDWORD srcBitCount, CK2::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, CK2::CKBYTE AlphaValue) {
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if (dst_desc == nullptr) return;
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CK2::CKDWORD* pixels = dst_desc->GetMutablePixels();
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CK2::CKDWORD pixelcount = dst_desc->GetPixelCount();
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for (CK2::CKDWORD i = 0; i < pixelcount; ++i) {
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*pixels = (*pixels) & 0x00FFFFFF | (static_cast<CK2::CKDWORD>(AlphaValue) << 24);
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++pixels;
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}
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//CK2::CKDWORD* pixels = dst_desc->GetPixels();
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//CK2::CKDWORD pixelcount = dst_desc->GetPixelCount(),
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// alphashift = VxGetBitShift(dst_desc->m_AlphaMask),
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// alphacount = VxGetBitCount(dst_desc->m_AlphaMask);
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//CK2::CKDWORD av = VxScaleFactor(AlphaValue, static_cast<CK2::CKDWORD>(sizeof(CK2::CKBYTE) * 8), alphacount) << alphashift;
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//for (CK2::CKDWORD i = 0; i < pixelcount; ++i) {
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// *pixels = (*pixels) & (~dst_desc->m_AlphaMask) | av;
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// ++pixels;
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//}
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}
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void VxDoAlphaBlit(VxImageDescEx* dst_desc, CK2::CKBYTE* AlphaValues) {
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if (dst_desc == nullptr) return;
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CK2::CKDWORD* pixels = dst_desc->GetMutablePixels();
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CK2::CKDWORD pixelcount = dst_desc->GetPixelCount();
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for (CK2::CKDWORD i = 0; i < pixelcount; ++i) {
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*pixels = (*pixels) & 0x00FFFFFF | (static_cast<CK2::CKDWORD>(*AlphaValues) << 24);
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++pixels;
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++AlphaValues;
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}
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//CK2::CKDWORD* pixels = dst_desc->GetPixels();
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//CK2::CKDWORD pixelcount = dst_desc->GetPixelCount(),
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// alphashift = VxGetBitShift(dst_desc->m_AlphaMask),
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// alphacount = VxGetBitCount(dst_desc->m_AlphaMask);
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//for (CK2::CKDWORD i = 0; i < pixelcount; ++i) {
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// *pixels = (*pixels) & (~dst_desc->m_AlphaMask) | (VxScaleFactor(*AlphaValues, static_cast<CK2::CKDWORD>(sizeof(CK2::CKBYTE) * 8), alphacount) << alphashift);
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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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