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Merge pull request #5 from disinvite/mxbitmap
This commit is contained in:
Joshua Peisach
GitHub
commit
3ca410781a
@ -1,4 +1,7 @@
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#include "mxbitmap.h"
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#include "decomp.h"
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DECOMP_SIZE_ASSERT(MxBITMAPINFO, 1064);
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// The way that the BITMAPFILEHEADER structure ensures the file type is by ensuring it is "BM", which is literally just 0x424d.
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// Sources: https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-bitmapfileheader, DirectX Complete (1998)
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@ -34,17 +37,19 @@ int MxBitmap::vtable14(int)
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}
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// OFFSET: LEGO1 0x100bcba0
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MxResult MxBitmap::vtable18(BITMAPINFOHEADER *p_bmiHeader)
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MxResult MxBitmap::vtable18(MxBITMAPINFO *p_info)
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{
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MxResult result = FAILURE;
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MxU32 width = p_bmiHeader->biWidth;
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MxU32 height = p_bmiHeader->biHeight;
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MxLong width = p_info->bmiHeader.biWidth;
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MxLong height = p_info->bmiHeader.biHeight;
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// ((width + 3) & -4) clamps width to nearest 4-byte boundary
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MxLong size = ((width + 3) & -4) * height;
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this->m_info = new BITMAPINFO;
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this->m_info = new MxBITMAPINFO;
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if (this->m_info) {
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this->m_data = (LPVOID*) malloc((sizeof(width + 3U & -4) * height));
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this->m_data = (LPVOID*) new MxU8[size];
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if(this->m_data) {
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memcpy(&this->m_info->bmiHeader, p_bmiHeader, sizeof(BITMAPINFO));
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memcpy(this->m_info, p_info, sizeof(MxBITMAPINFO));
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this->m_bmiHeader = &this->m_info->bmiHeader;
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this->m_paletteData = this->m_info->bmiColors;
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result = SUCCESS;
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@ -53,9 +58,11 @@ MxResult MxBitmap::vtable18(BITMAPINFOHEADER *p_bmiHeader)
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if (result != SUCCESS) {
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if (this->m_info) {
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delete this->m_info;
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this->m_info = NULL;
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}
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if (this->m_data) {
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delete this->m_data;
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this->m_data = NULL;
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}
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}
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return result;
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@ -63,26 +70,27 @@ MxResult MxBitmap::vtable18(BITMAPINFOHEADER *p_bmiHeader)
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// OFFSET: LEGO1 0x100bd450
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MxResult ImportColorsToPalette(RGBQUAD* p_rgbquad, MxPalette* p_palette)
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MxResult MxBitmap::ImportColorsToPalette(RGBQUAD* p_rgbquad, MxPalette* p_palette)
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{
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MxPalette* local_pal;
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MxResult ret = FAILURE;
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PALETTEENTRY entries[256];
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MxResult opret;
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if(p_palette == NULL) {
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local_pal = new MxPalette;
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opret = local_pal->GetEntries(entries);
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if(opret != 0) {
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delete local_pal;
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if (p_palette) {
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if (p_palette->GetEntries(entries))
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return ret;
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}
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} else {
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opret = p_palette->GetEntries(entries);
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if(opret != 0) return ret;
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MxPalette local_pal;
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if (local_pal.GetEntries(entries))
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return ret;
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}
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for (int i = 0; i < 256; i++) {
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p_rgbquad[i].rgbRed = entries[i].peRed;
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p_rgbquad[i].rgbGreen = entries[i].peGreen;
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p_rgbquad[i].rgbBlue = entries[i].peBlue;
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p_rgbquad[i].rgbReserved = 0;
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}
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// FIXME/TODO: the loop here, possibly memcpy
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ret = SUCCESS;
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return ret;
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}
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@ -105,14 +113,14 @@ MxResult MxBitmap::LoadFile(HANDLE p_handle)
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ret = ReadFile(p_handle, &hdr, sizeof(hdr), &bytesRead, NULL);
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if (ret && (hdr.bfType == g_bitmapSignature)) {
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this->m_info = new BITMAPINFO;
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this->m_info = new MxBITMAPINFO;
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if(this->m_info) {
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ret = ReadFile(p_handle, this->m_info, 1064, &bytesRead, NULL);
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ret = ReadFile(p_handle, this->m_info, sizeof(MxBITMAPINFO), &bytesRead, NULL);
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if (ret && ((this->m_info->bmiHeader).biBitCount == 8)) {
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lpBuffer = (LPVOID*) malloc(hdr.bfSize - 1078);
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lpBuffer = (LPVOID*) malloc(hdr.bfSize - (sizeof(MxBITMAPINFO) + sizeof(BITMAPFILEHEADER)));
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this->m_data = lpBuffer;
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if (this->m_data) {
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ret = ReadFile(p_handle, lpBuffer, hdr.bfSize - 1078, &bytesRead, NULL);
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ret = ReadFile(p_handle, lpBuffer, hdr.bfSize - (sizeof(MxBITMAPINFO) + sizeof(BITMAPFILEHEADER)), &bytesRead, NULL);
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if(ret != 0) {
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this->m_bmiHeader = &this->m_info->bmiHeader;
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this->m_paletteData = this->m_info->bmiColors;
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@ -211,13 +219,20 @@ MxPalette *MxBitmap::CreatePalette()
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// OFFSET: LEGO1 0x100bd280
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void MxBitmap::ImportPalette(MxPalette* p_palette)
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{
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if (this->m_bmiColorsProvided) {
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ImportColorsToPalette(this->m_paletteData, p_palette);
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// This is weird but it matches. Maybe m_bmiColorsProvided had more
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// potential values than just true/false at some point?
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switch (this->m_bmiColorsProvided) {
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case FALSE:
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ImportColorsToPalette(this->m_paletteData, p_palette);
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break;
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case TRUE:
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if (this->m_palette) {
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delete this->m_palette;
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}
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this->m_palette = p_palette->Clone();
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break;
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}
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if (this->m_palette) {
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delete this->m_palette;
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}
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this->m_palette = p_palette->Clone();
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}
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// OFFSET: LEGO1 0x100bd2d0 STUB
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@ -234,5 +249,5 @@ MxResult MxBitmap::CopyColorData(HDC p_hdc, int p_xSrc, int p_ySrc, int p_xDest,
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p_ySrc = (this->m_bmiHeader->biHeight - p_destHeight) - p_ySrc;
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}
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return StretchDIBits(p_hdc, p_xDest, p_yDest, p_destWidth, p_destHeight, p_xSrc, p_ySrc, p_destWidth, p_destHeight, this->m_data, this->m_info, this->m_bmiColorsProvided, SRCCOPY);
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return StretchDIBits(p_hdc, p_xDest, p_yDest, p_destWidth, p_destHeight, p_xSrc, p_ySrc, p_destWidth, p_destHeight, this->m_data, (BITMAPINFO*)this->m_info, this->m_bmiColorsProvided, SRCCOPY);
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}
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@ -7,6 +7,20 @@
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#include "mxpalette.h"
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#include "mxtypes.h"
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// The stock BITMAPINFO struct from wingdi.h only makes room for one color
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// in the palette. It seems like the expectation (if you use the struct)
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// is to malloc as much as you actually need, and then index into the array
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// anyway even though its stated size is [1].
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// https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-bitmapinfo
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// In our case, the size 0x428 is used frequently, which matches
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// a 40-byte header plus 256 colors, so just use that as our template.
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// SIZE 0x428
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struct MxBITMAPINFO {
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BITMAPINFOHEADER bmiHeader;
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RGBQUAD bmiColors[256];
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};
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class MxBitmap : public MxCore
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{
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public:
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@ -14,7 +28,7 @@ class MxBitmap : public MxCore
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__declspec(dllexport) virtual ~MxBitmap(); // vtable+00
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virtual int vtable14(int);
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virtual MxResult vtable18(BITMAPINFOHEADER *p_bmiHeader);
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virtual MxResult vtable18(MxBITMAPINFO *p_info);
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virtual int vtable1c(int p_width, int p_height, MxPalette *p_palette, int);
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virtual MxResult LoadFile(HANDLE p_handle);
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__declspec(dllexport) virtual MxLong Read(const char *p_filename); // vtable+24
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@ -27,7 +41,9 @@ class MxBitmap : public MxCore
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virtual MxResult CopyColorData(HDC p_hdc, int p_xSrc, int p_ySrc, int p_xDest, int p_yDest, int p_destWidth, int p_destHeight); // vtable+40
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private:
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BITMAPINFO *m_info; // 0x8
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MxResult ImportColorsToPalette(RGBQUAD*, MxPalette*);
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MxBITMAPINFO *m_info; // 0x8
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BITMAPINFOHEADER *m_bmiHeader; // 0xc
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RGBQUAD *m_paletteData; // 0x10
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LPVOID *m_data; // 0x14
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