diff options
Diffstat (limited to 'mesalib/src/mesa/drivers/windows/gldirect/mesasw/gld_wgl_mesasw.c')
| -rw-r--r-- | mesalib/src/mesa/drivers/windows/gldirect/mesasw/gld_wgl_mesasw.c | 1720 |
1 files changed, 1720 insertions, 0 deletions
diff --git a/mesalib/src/mesa/drivers/windows/gldirect/mesasw/gld_wgl_mesasw.c b/mesalib/src/mesa/drivers/windows/gldirect/mesasw/gld_wgl_mesasw.c new file mode 100644 index 000000000..342a74286 --- /dev/null +++ b/mesalib/src/mesa/drivers/windows/gldirect/mesasw/gld_wgl_mesasw.c @@ -0,0 +1,1720 @@ +/**************************************************************************** +* +* Mesa 3-D graphics library +* Direct3D Driver Interface +* +* ======================================================================== +* +* Copyright (C) 1991-2004 SciTech Software, Inc. All rights reserved. +* +* Permission is hereby granted, free of charge, to any person obtaining a +* copy of this software and associated documentation files (the "Software"), +* to deal in the Software without restriction, including without limitation +* the rights to use, copy, modify, merge, publish, distribute, sublicense, +* and/or sell copies of the Software, and to permit persons to whom the +* Software is furnished to do so, subject to the following conditions: +* +* The above copyright notice and this permission notice shall be included +* in all copies or substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL +* SCITECH SOFTWARE INC BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF +* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +* SOFTWARE. +* +* ====================================================================== +* +* Language: ANSI C +* Environment: Windows 9x/2000/XP/XBox (Win32) +* +* Description: Mesa Software WGL (WindowsGL) +* +****************************************************************************/ + +#include <windows.h> +#define GL_GLEXT_PROTOTYPES +#include <GL/gl.h> +#include <GL/glext.h> + +#include "glheader.h" +#include "colors.h" +#include "context.h" +#include "colormac.h" +#include "dd.h" +#include "depth.h" +#include "extensions.h" +#include "macros.h" +#include "matrix.h" +// #include "mem.h" +//#include "mmath.h" +#include "mtypes.h" +#include "texformat.h" +#include "texstore.h" +#include "teximage.h" +#include "vbo/vbo.h" +#include "swrast/swrast.h" +#include "swrast_setup/swrast_setup.h" +#include "swrast/s_context.h" +#include "swrast/s_depth.h" +#include "swrast/s_lines.h" +#include "swrast/s_triangle.h" +#include "swrast/s_trispan.h" +#include "tnl/tnl.h" +#include "tnl/t_context.h" +#include "tnl/t_pipeline.h" + +#include "dglcontext.h" +#include "gld_driver.h" + +//--------------------------------------------------------------------------- +//--------------------------------------------------------------------------- + +DGL_pixelFormat pfTemplateMesaSW = +{ + { + sizeof(PIXELFORMATDESCRIPTOR), // Size of the data structure + 1, // Structure version - should be 1 + // Flags: + PFD_DRAW_TO_WINDOW | // The buffer can draw to a window or device surface. + PFD_DRAW_TO_BITMAP | // The buffer can draw to a bitmap. (DaveM) + PFD_SUPPORT_GDI | // The buffer supports GDI drawing. (DaveM) + PFD_SUPPORT_OPENGL | // The buffer supports OpenGL drawing. + PFD_DOUBLEBUFFER | // The buffer is double-buffered. + 0, // Placeholder for easy commenting of above flags + PFD_TYPE_RGBA, // Pixel type RGBA. + 32, // Total colour bitplanes (excluding alpha bitplanes) + 8, 0, // Red bits, shift + 8, 8, // Green bits, shift + 8, 16, // Blue bits, shift + 8, 24, // Alpha bits, shift (destination alpha) + 64, // Accumulator bits (total) + 16, 16, 16, 16, // Accumulator bits: Red, Green, Blue, Alpha + 16, // Depth bits + 8, // Stencil bits + 0, // Number of auxiliary buffers + 0, // Layer type + 0, // Specifies the number of overlay and underlay planes. + 0, // Layer mask + 0, // Specifies the transparent color or index of an underlay plane. + 0 // Damage mask + }, + 0, // Unused +}; + +//--------------------------------------------------------------------------- +// Extensions +//--------------------------------------------------------------------------- + +typedef struct { + PROC proc; + char *name; +} GLD_extension; + +static GLD_extension GLD_extList[] = { +#ifdef GL_EXT_polygon_offset + { (PROC)glPolygonOffsetEXT, "glPolygonOffsetEXT" }, +#endif + { (PROC)glBlendEquationEXT, "glBlendEquationEXT" }, + { (PROC)glBlendColorEXT, "glBlendColorExt" }, + { (PROC)glVertexPointerEXT, "glVertexPointerEXT" }, + { (PROC)glNormalPointerEXT, "glNormalPointerEXT" }, + { (PROC)glColorPointerEXT, "glColorPointerEXT" }, + { (PROC)glIndexPointerEXT, "glIndexPointerEXT" }, + { (PROC)glTexCoordPointerEXT, "glTexCoordPointer" }, + { (PROC)glEdgeFlagPointerEXT, "glEdgeFlagPointerEXT" }, + { (PROC)glGetPointervEXT, "glGetPointervEXT" }, + { (PROC)glArrayElementEXT, "glArrayElementEXT" }, + { (PROC)glDrawArraysEXT, "glDrawArrayEXT" }, + { (PROC)glAreTexturesResidentEXT, "glAreTexturesResidentEXT" }, + { (PROC)glBindTextureEXT, "glBindTextureEXT" }, + { (PROC)glDeleteTexturesEXT, "glDeleteTexturesEXT" }, + { (PROC)glGenTexturesEXT, "glGenTexturesEXT" }, + { (PROC)glIsTextureEXT, "glIsTextureEXT" }, + { (PROC)glPrioritizeTexturesEXT, "glPrioritizeTexturesEXT" }, + { (PROC)glCopyTexSubImage3DEXT, "glCopyTexSubImage3DEXT" }, + { (PROC)glTexImage3DEXT, "glTexImage3DEXT" }, + { (PROC)glTexSubImage3DEXT, "glTexSubImage3DEXT" }, + { (PROC)glPointParameterfEXT, "glPointParameterfEXT" }, + { (PROC)glPointParameterfvEXT, "glPointParameterfvEXT" }, + { (PROC)glLockArraysEXT, "glLockArraysEXT" }, + { (PROC)glUnlockArraysEXT, "glUnlockArraysEXT" }, + { NULL, "\0" } +}; + +//--------------------------------------------------------------------------- +// WMesa Internal Functions +//--------------------------------------------------------------------------- + +#define PAGE_FILE 0xffffffff + +#define REDBITS 0x03 +#define REDSHIFT 0x00 +#define GREENBITS 0x03 +#define GREENSHIFT 0x03 +#define BLUEBITS 0x02 +#define BLUESHIFT 0x06 + +typedef struct _dibSection { + HDC hDC; + HANDLE hFileMap; + BOOL fFlushed; + LPVOID base; +} WMDIBSECTION, *PWMDIBSECTION; + +typedef struct wmesa_context { + HWND Window; + HDC hDC; + HPALETTE hPalette; + HPALETTE hOldPalette; + HPEN hPen; + HPEN hOldPen; + HCURSOR hOldCursor; + COLORREF crColor; + // 3D projection stuff + RECT drawRect; + UINT uiDIBoffset; + // OpenGL stuff + HPALETTE hGLPalette; + GLuint width; + GLuint height; + GLuint ScanWidth; + GLboolean db_flag; //* double buffered? + GLboolean rgb_flag; //* RGB mode? + GLboolean dither_flag; //* use dither when 256 color mode for RGB? + GLuint depth; //* bits per pixel (1, 8, 24, etc) + ULONG pixel; // current color index or RGBA pixel value + ULONG clearpixel; //* pixel for clearing the color buffers + PBYTE ScreenMem; // WinG memory + BITMAPINFO *IndexFormat; + HPALETTE hPal; // Current Palette + HPALETTE hPalHalfTone; + + + WMDIBSECTION dib; + BITMAPINFO bmi; + HBITMAP hbmDIB; + HBITMAP hOldBitmap; + HBITMAP Old_Compat_BM; + HBITMAP Compat_BM; // Bitmap for double buffering + PBYTE pbPixels; + int nColors; + BYTE cColorBits; + int pixelformat; + + RECT rectOffScreen; + RECT rectSurface; +// HWND hwnd; + DWORD pitch; + PBYTE addrOffScreen; + + // We always double-buffer, for performance reasons, but + // we need to know which of SwapBuffers() or glFlush() to + // handle. If we're emulating, then we update on Flush(), + // otherwise we update on SwapBufers(). KeithH + BOOL bEmulateSingleBuffer; +} WMesaContext, *PWMC; + +#define GLD_GET_WMESA_DRIVER(c) (WMesaContext*)(c)->glPriv + +// TODO: +GLint stereo_flag = 0 ; + +/* If we are double-buffering, we want to get the DC for the + * off-screen DIB, otherwise the DC for the window. + */ +#define DD_GETDC ((Current->db_flag) ? Current->dib.hDC : Current->hDC ) +#define DD_RELEASEDC + +#define FLIP(Y) (Current->height-(Y)-1) + +struct DISPLAY_OPTIONS { + int stereo; + int fullScreen; + int mode; + int bpp; +}; + +struct DISPLAY_OPTIONS displayOptions; + +//--------------------------------------------------------------------------- + +static unsigned char threeto8[8] = { + 0, 0111>>1, 0222>>1, 0333>>1, 0444>>1, 0555>>1, 0666>>1, 0377 +}; + +static unsigned char twoto8[4] = { + 0, 0x55, 0xaa, 0xff +}; + +static unsigned char oneto8[2] = { + 0, 255 +}; + +//--------------------------------------------------------------------------- + +BYTE DITHER_RGB_2_8BIT( int red, int green, int blue, int pixel, int scanline) +{ + char unsigned redtemp, greentemp, bluetemp, paletteindex; + + //*** now, look up each value in the halftone matrix + //*** using an 8x8 ordered dither. + redtemp = aDividedBy51[red] + + (aModulo51[red] > aHalftone8x8[(pixel%8)*8 + + scanline%8]); + greentemp = aDividedBy51[(char unsigned)green] + + (aModulo51[green] > aHalftone8x8[ + (pixel%8)*8 + scanline%8]); + bluetemp = aDividedBy51[(char unsigned)blue] + + (aModulo51[blue] > aHalftone8x8[ + (pixel%8)*8 +scanline%8]); + + //*** recombine the halftoned rgb values into a palette index + paletteindex = + redtemp + aTimes6[greentemp] + aTimes36[bluetemp]; + + //*** and translate through the wing halftone palette + //*** translation vector to give the correct value. + return aWinGHalftoneTranslation[paletteindex]; +} + +//--------------------------------------------------------------------------- + +static unsigned char componentFromIndex(UCHAR i, UINT nbits, UINT shift) +{ + unsigned char val; + + val = i >> shift; + switch (nbits) { + + case 1: + val &= 0x1; + return oneto8[val]; + + case 2: + val &= 0x3; + return twoto8[val]; + + case 3: + val &= 0x7; + return threeto8[val]; + + default: + return 0; + } +} + +//--------------------------------------------------------------------------- + + +void wmSetPixel(PWMC pwc, int iScanLine, int iPixel, BYTE r, BYTE g, BYTE b) +{ + WMesaContext *Current = pwc; + + // Test for invalid scanline parameter. KeithH + if ((iScanLine < 0) || (iScanLine >= pwc->height)) + return; + + if (Current->db_flag) { + LPBYTE lpb = pwc->pbPixels; + UINT nBypp = pwc->cColorBits >> 3; + UINT nOffset = iPixel % nBypp; + + lpb += pwc->ScanWidth * iScanLine; + lpb += iPixel * nBypp; + + if(nBypp == 1){ + if(pwc->dither_flag) + *lpb = DITHER_RGB_2_8BIT(r,g,b,iScanLine,iPixel); + else + *lpb = BGR8(r,g,b); + } + else if(nBypp == 2) + *((LPWORD)lpb) = BGR16(r,g,b); + else if (nBypp == 3) + *((LPDWORD)lpb) = BGR24(r,g,b); + else if (nBypp == 4) + *((LPDWORD)lpb) = BGR32(r,g,b); + } + else{ + SetPixel(Current->hDC, iPixel, iScanLine, RGB(r,g,b)); + } +} + +//--------------------------------------------------------------------------- + +void wmCreateDIBSection( + HDC hDC, + PWMC pwc, // handle of device context + CONST BITMAPINFO *pbmi, // bitmap size, format, and color data + UINT iUsage // color data type indicator: RGB values or palette indices + ) +{ + DWORD dwSize = 0; + DWORD dwScanWidth; + UINT nBypp = pwc->cColorBits / 8; + HDC hic; + + dwScanWidth = (((pwc->ScanWidth * nBypp)+ 3) & ~3); + + pwc->ScanWidth =pwc->pitch = dwScanWidth; + + if (stereo_flag) + pwc->ScanWidth = 2* pwc->pitch; + + dwSize = sizeof(BITMAPINFO) + (dwScanWidth * pwc->height); + + pwc->dib.hFileMap = CreateFileMapping((HANDLE)PAGE_FILE, + NULL, + PAGE_READWRITE | SEC_COMMIT, + 0, + dwSize, + NULL); + + if (!pwc->dib.hFileMap) + return; + + pwc->dib.base = MapViewOfFile(pwc->dib.hFileMap, + FILE_MAP_ALL_ACCESS, + 0, + 0, + 0); + + if(!pwc->dib.base){ + CloseHandle(pwc->dib.hFileMap); + return; + } + + + CopyMemory(pwc->dib.base, pbmi, sizeof(BITMAPINFO)); + + hic = CreateIC("display", NULL, NULL, NULL); + pwc->dib.hDC = CreateCompatibleDC(hic); + + + pwc->hbmDIB = CreateDIBSection(hic, + &(pwc->bmi), + (iUsage ? DIB_PAL_COLORS : DIB_RGB_COLORS), + &(pwc->pbPixels), + pwc->dib.hFileMap, + 0); + pwc->ScreenMem = pwc->addrOffScreen = pwc->pbPixels; + pwc->hOldBitmap = SelectObject(pwc->dib.hDC, pwc->hbmDIB); + + DeleteDC(hic); + + return; + +} + +//--------------------------------------------------------------------------- + +void wmCreatePalette( PWMC pwdc ) +{ + /* Create a compressed and re-expanded 3:3:2 palette */ + int i; + LOGPALETTE *pPal; + BYTE rb, rs, gb, gs, bb, bs; + + pwdc->nColors = 0x100; + + pPal = (PLOGPALETTE)malloc(sizeof(LOGPALETTE) + + pwdc->nColors * sizeof(PALETTEENTRY)); + memset( pPal, 0, sizeof(LOGPALETTE) + pwdc->nColors * sizeof(PALETTEENTRY) ); + + pPal->palVersion = 0x300; + + rb = REDBITS; + rs = REDSHIFT; + gb = GREENBITS; + gs = GREENSHIFT; + bb = BLUEBITS; + bs = BLUESHIFT; + + if (pwdc->db_flag) { + + /* Need to make two palettes: one for the screen DC and one for the DIB. */ + pPal->palNumEntries = pwdc->nColors; + for (i = 0; i < pwdc->nColors; i++) { + pPal->palPalEntry[i].peRed = componentFromIndex( i, rb, rs ); + pPal->palPalEntry[i].peGreen = componentFromIndex( i, gb, gs ); + pPal->palPalEntry[i].peBlue = componentFromIndex( i, bb, bs ); + pPal->palPalEntry[i].peFlags = 0; + } + pwdc->hGLPalette = CreatePalette( pPal ); + pwdc->hPalette = CreatePalette( pPal ); + } + + else { + pPal->palNumEntries = pwdc->nColors; + for (i = 0; i < pwdc->nColors; i++) { + pPal->palPalEntry[i].peRed = componentFromIndex( i, rb, rs ); + pPal->palPalEntry[i].peGreen = componentFromIndex( i, gb, gs ); + pPal->palPalEntry[i].peBlue = componentFromIndex( i, bb, bs ); + pPal->palPalEntry[i].peFlags = 0; + } + pwdc->hGLPalette = CreatePalette( pPal ); + } + + free(pPal); + +} + +//--------------------------------------------------------------------------- + +/* This function sets the color table of a DIB section + * to match that of the destination DC + */ +BOOL wmSetDibColors(PWMC pwc) +{ + RGBQUAD *pColTab, *pRGB; + PALETTEENTRY *pPal, *pPE; + int i, nColors; + BOOL bRet=TRUE; + DWORD dwErr=0; + + /* Build a color table in the DIB that maps to the + * selected palette in the DC. + */ + nColors = 1 << pwc->cColorBits; + pPal = (PALETTEENTRY *)malloc( nColors * sizeof(PALETTEENTRY)); + memset( pPal, 0, nColors * sizeof(PALETTEENTRY) ); + GetPaletteEntries( pwc->hGLPalette, 0, nColors, pPal ); + pColTab = (RGBQUAD *)malloc( nColors * sizeof(RGBQUAD)); + for (i = 0, pRGB = pColTab, pPE = pPal; i < nColors; i++, pRGB++, pPE++) { + pRGB->rgbRed = pPE->peRed; + pRGB->rgbGreen = pPE->peGreen; + pRGB->rgbBlue = pPE->peBlue; + } + if(pwc->db_flag) + bRet = SetDIBColorTable(pwc->dib.hDC, 0, nColors, pColTab ); + + if(!bRet) + dwErr = GetLastError(); + + free( pColTab ); + free( pPal ); + + return bRet; +} + +//--------------------------------------------------------------------------- + +static void wmSetPixelFormat( PWMC wc, HDC hDC) +{ + if(wc->rgb_flag) + wc->cColorBits = GetDeviceCaps(hDC, BITSPIXEL); + else + wc->cColorBits = 8; + switch(wc->cColorBits){ + case 8: + if(wc->dither_flag != GL_TRUE) + wc->pixelformat = PF_INDEX8; + else + wc->pixelformat = PF_DITHER8; + break; + case 16: + wc->pixelformat = PF_5R6G5B; + break; + case 32: + wc->pixelformat = PF_8R8G8B; + break; + default: + wc->pixelformat = PF_BADFORMAT; + } +} + +//--------------------------------------------------------------------------- + +/* + * This function creates the DIB section that is used for combined + * GL and GDI calls + */ +BOOL wmCreateBackingStore(PWMC pwc, long lxSize, long lySize) +{ + HDC hdc = pwc->hDC; + LPBITMAPINFO pbmi = &(pwc->bmi); + int iUsage; + + pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); + pbmi->bmiHeader.biWidth = lxSize; + pbmi->bmiHeader.biHeight= -lySize; + pbmi->bmiHeader.biPlanes = 1; + if(pwc->rgb_flag) + pbmi->bmiHeader.biBitCount = GetDeviceCaps(pwc->hDC, BITSPIXEL); + else + pbmi->bmiHeader.biBitCount = 8; + pbmi->bmiHeader.biCompression = BI_RGB; + pbmi->bmiHeader.biSizeImage = 0; + pbmi->bmiHeader.biXPelsPerMeter = 0; + pbmi->bmiHeader.biYPelsPerMeter = 0; + pbmi->bmiHeader.biClrUsed = 0; + pbmi->bmiHeader.biClrImportant = 0; + + iUsage = (pbmi->bmiHeader.biBitCount <= 8) ? DIB_PAL_COLORS : DIB_RGB_COLORS; + + pwc->cColorBits = pbmi->bmiHeader.biBitCount; + pwc->ScanWidth = pwc->pitch = lxSize; + pwc->width = lxSize; + pwc->height = lySize; + + wmCreateDIBSection(hdc, pwc, pbmi, iUsage); + + if ((iUsage == DIB_PAL_COLORS) && !(pwc->hGLPalette)) { + wmCreatePalette( pwc ); + wmSetDibColors( pwc ); + } + wmSetPixelFormat(pwc, pwc->hDC); + return TRUE; +} + +//--------------------------------------------------------------------------- + +/* + * Free up the dib section that was created + */ +BOOL wmDeleteBackingStore(PWMC pwc) +{ + SelectObject(pwc->dib.hDC, pwc->hOldBitmap); + DeleteDC(pwc->dib.hDC); + DeleteObject(pwc->hbmDIB); + UnmapViewOfFile(pwc->dib.base); + CloseHandle(pwc->dib.hFileMap); + return TRUE; +} + +//--------------------------------------------------------------------------- + +/* + * Blit memory DC to screen DC + */ +BOOL wmFlush(PWMC pwc, HDC hDC) +{ + BOOL bRet = 0; + DWORD dwErr = 0; + +// Now using bEmulateSingleBuffer in the calling function. KeithH + +// if(pwc->db_flag){ + bRet = BitBlt(hDC, 0, 0, pwc->width, pwc->height, + pwc->dib.hDC, 0, 0, SRCCOPY); +// } + + return bRet; + +} + +//--------------------------------------------------------------------------- +// Support Functions +//--------------------------------------------------------------------------- + +static void flush(GLcontext* ctx) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); +/* + if((Current->rgb_flag &&!(Current->db_flag)) + ||(!Current->rgb_flag)) + { + wmFlush(Current, Current->hDC); + } +*/ + // Only flush if we're not in double-buffer mode. KeithH + // The demo fractal.c calls glutSwapBuffers() then glFlush()! + if (Current->bEmulateSingleBuffer) { + wmFlush(Current, Current->hDC); + } +} + + +//--------------------------------------------------------------------------- + + +/* + * Set the color index used to clear the color buffer. + */ +static void clear_index(GLcontext* ctx, GLuint index) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + Current->clearpixel = index; +} + + + +//--------------------------------------------------------------------------- + +/* + * Set the color used to clear the color buffer. + */ +//static void clear_color( GLcontext* ctx, const GLchan color[4] ) +// Changed for Mesa 5.x. KeithH +static void clear_color( + GLcontext* ctx, + const GLfloat color[4]) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLubyte col[4]; + CLAMPED_FLOAT_TO_UBYTE(col[0], color[0]); + CLAMPED_FLOAT_TO_UBYTE(col[1], color[1]); + CLAMPED_FLOAT_TO_UBYTE(col[2], color[2]); + Current->clearpixel = RGB(col[0], col[1], col[2]); +} + + +//--------------------------------------------------------------------------- + + +/* + * Clear the specified region of the color buffer using the clear color + * or index as specified by one of the two functions above. + * + * This procedure clears either the front and/or the back COLOR buffers. + * Only the "left" buffer is cleared since we are not stereo. + * Clearing of the other non-color buffers is left to the swrast. + * We also only clear the color buffers if the color masks are all 1's. + * Otherwise, we let swrast do it. + */ + +static clear(GLcontext* ctx, GLbitfield mask, + GLboolean all, GLint x, GLint y, GLint width, GLint height) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + DWORD dwColor; + WORD wColor; + BYTE bColor; + LPDWORD lpdw = (LPDWORD)Current->pbPixels; + LPWORD lpw = (LPWORD)Current->pbPixels; + LPBYTE lpb = Current->pbPixels; + int lines; + const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask; + + if (all){ + x=y=0; + width=Current->width; + height=Current->height; + } + + + /* sanity check - can't have right(stereo) buffers */ + assert((mask & (DD_FRONT_RIGHT_BIT | DD_BACK_RIGHT_BIT)) == 0); + + /* clear alpha */ + if ((mask & (DD_FRONT_LEFT_BIT | DD_BACK_RIGHT_BIT)) && + ctx->DrawBuffer->UseSoftwareAlphaBuffers && + ctx->Color.ColorMask[ACOMP]) { + _swrast_clear_alpha_buffers( ctx ); + } + + if (*colorMask == 0xffffffff && ctx->Color.IndexMask == 0xffffffff) { + if (mask & DD_BACK_LEFT_BIT) { + /* Double-buffering - clear back buffer */ + UINT nBypp = Current->cColorBits / 8; + int i = 0; + int iSize = 0; + + assert(Current->db_flag==GL_TRUE); /* we'd better be double buffer */ + if(nBypp ==1 ){ + iSize = Current->width/4; + bColor = BGR8(GetRValue(Current->clearpixel), + GetGValue(Current->clearpixel), + GetBValue(Current->clearpixel)); + wColor = MAKEWORD(bColor,bColor); + dwColor = MAKELONG(wColor, wColor); + } + if(nBypp == 2){ + iSize = Current->width / 2; + wColor = BGR16(GetRValue(Current->clearpixel), + GetGValue(Current->clearpixel), + GetBValue(Current->clearpixel)); + dwColor = MAKELONG(wColor, wColor); + } + else if(nBypp == 4){ + iSize = Current->width; + dwColor = BGR32(GetRValue(Current->clearpixel), + GetGValue(Current->clearpixel), + GetBValue(Current->clearpixel)); + } + + /* clear a line */ + while(i < iSize){ + *lpdw = dwColor; + lpdw++; + i++; + } + + /* This is the 24bit case */ + if (nBypp == 3) { + iSize = Current->width *3/4; + dwColor = BGR24(GetRValue(Current->clearpixel), + GetGValue(Current->clearpixel), + GetBValue(Current->clearpixel)); + while(i < iSize){ + *lpdw = dwColor; + lpb += nBypp; + lpdw = (LPDWORD)lpb; + i++; + } + } + + i = 0; + if (stereo_flag) + lines = height /2; + else + lines = height; + /* copy cleared line to other lines in buffer */ + do { + memcpy(lpb, Current->pbPixels, iSize*4); + lpb += Current->ScanWidth; + i++; + } + while (i<lines-1); + mask &= ~DD_BACK_LEFT_BIT; + } /* double-buffer */ + + if (mask & DD_FRONT_LEFT_BIT) { + /* single-buffer */ + HDC DC=DD_GETDC; + HPEN Pen=CreatePen(PS_SOLID,1,Current->clearpixel); + HBRUSH Brush=CreateSolidBrush(Current->clearpixel); + HPEN Old_Pen=SelectObject(DC,Pen); + HBRUSH Old_Brush=SelectObject(DC,Brush); + Rectangle(DC,x,y,x+width,y+height); + SelectObject(DC,Old_Pen); + SelectObject(DC,Old_Brush); + DeleteObject(Pen); + DeleteObject(Brush); + DD_RELEASEDC; + mask &= ~DD_FRONT_LEFT_BIT; + } /* single-buffer */ + } /* if masks are all 1's */ + + /* Call swrast if there is anything left to clear (like DEPTH) */ + if (mask) + _swrast_Clear( ctx, mask, all, x, y, width, height ); +} + + +//--------------------------------------------------------------------------- + + +static void enable( GLcontext* ctx, GLenum pname, GLboolean enable ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + + if (!Current) + return; + + if (pname == GL_DITHER) { + if(enable == GL_FALSE){ + Current->dither_flag = GL_FALSE; + if(Current->cColorBits == 8) + Current->pixelformat = PF_INDEX8; + } + else{ + if (Current->rgb_flag && Current->cColorBits == 8){ + Current->pixelformat = PF_DITHER8; + Current->dither_flag = GL_TRUE; + } + else + Current->dither_flag = GL_FALSE; + } + } +} + +//--------------------------------------------------------------------------- + +static GLboolean set_draw_buffer( GLcontext* ctx, GLenum mode ) +{ + /* TODO: this could be better */ + if (mode==GL_FRONT_LEFT || mode==GL_BACK_LEFT) { + return GL_TRUE; + } + else { + return GL_FALSE; + } +} + +//--------------------------------------------------------------------------- + + +static void set_read_buffer(GLcontext *ctx, GLframebuffer *colorBuffer, + GLenum buffer ) +{ + /* XXX todo */ + return; +} + + +//--------------------------------------------------------------------------- + + +/* Return characteristics of the output buffer. */ +//static void buffer_size( GLcontext* ctx, GLuint *width, GLuint *height ) +// Altered for Mesa 5.x. KeithH +static void buffer_size( + GLframebuffer *buffer, + GLuint *width, + GLuint *height) +{ + // For some reason the context is not passed into this function. + // Therefore we have to explicitly retrieve it. + GET_CURRENT_CONTEXT(ctx); + + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + int New_Size; + RECT CR; + + GetClientRect(Current->Window,&CR); + + *width=CR.right; + *height=CR.bottom; + + New_Size=((*width)!=Current->width) || ((*height)!=Current->height); + + if (New_Size){ + Current->width=*width; + Current->height=*height; + Current->ScanWidth=Current->width; + if ((Current->ScanWidth%sizeof(long))!=0) + Current->ScanWidth+=(sizeof(long)-(Current->ScanWidth%sizeof(long))); + + if (Current->db_flag){ + if (Current->rgb_flag==GL_TRUE && Current->dither_flag!=GL_TRUE){ + wmDeleteBackingStore(Current); + wmCreateBackingStore(Current, Current->width, Current->height); + } + } + + } +} + + + +/**********************************************************************/ +/***** Accelerated point, line, polygon rendering *****/ +/**********************************************************************/ + +/* Accelerated routines are not implemented in 4.0. See OSMesa for ideas. */ + +static void fast_rgb_points( GLcontext* ctx, GLuint first, GLuint last ) +{ +} + +//--------------------------------------------------------------------------- + +/* Return pointer to accelerated points function */ +extern tnl_points_func choose_points_function( GLcontext* ctx ) +{ + return NULL; +} + +//--------------------------------------------------------------------------- + +static void fast_flat_rgb_line( GLcontext* ctx, GLuint v0, + GLuint v1, GLuint pv ) +{ +} + +//--------------------------------------------------------------------------- + +static tnl_line_func choose_line_function( GLcontext* ctx ) +{ +} + + +/**********************************************************************/ +/***** Span-based pixel drawing *****/ +/**********************************************************************/ + + +/* Write a horizontal span of 32-bit color-index pixels with a boolean mask. */ +static void write_ci32_span( const GLcontext* ctx, + GLuint n, GLint x, GLint y, + const GLuint index[], + const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + PBYTE Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x; + assert(Current->rgb_flag==GL_FALSE); + for (i=0; i<n; i++) + if (mask[i]) + Mem[i]=index[i]; +} + + +//--------------------------------------------------------------------------- + +/* Write a horizontal span of 8-bit color-index pixels with a boolean mask. */ +static void write_ci8_span( const GLcontext* ctx, + GLuint n, GLint x, GLint y, + const GLubyte index[], + const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + PBYTE Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x; + assert(Current->rgb_flag==GL_FALSE); + for (i=0; i<n; i++) + if (mask[i]) + Mem[i]=index[i]; +} + + +//--------------------------------------------------------------------------- + + +/* + * Write a horizontal span of pixels with a boolean mask. The current + * color index is used for all pixels. + */ +static void write_mono_ci_span(const GLcontext* ctx, + GLuint n,GLint x,GLint y, + GLuint colorIndex, const GLubyte mask[]) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + BYTE *Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x; + assert(Current->rgb_flag==GL_FALSE); + for (i=0; i<n; i++) + if (mask[i]) + Mem[i]=colorIndex; +} + +//--------------------------------------------------------------------------- + +/* + * To improve the performance of this routine, frob the data into an actual + * scanline and call bitblt on the complete scan line instead of SetPixel. + */ + +/* Write a horizontal span of RGBA color pixels with a boolean mask. */ +static void write_rgba_span( const GLcontext* ctx, GLuint n, GLint x, GLint y, + const GLubyte rgba[][4], const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + PWMC pwc = Current; + + if (pwc->rgb_flag==GL_TRUE) + { + GLuint i; + HDC DC=DD_GETDC; + y=FLIP(y); + if (mask) { + for (i=0; i<n; i++) + if (mask[i]) + wmSetPixel(pwc, y, x + i, + rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); + } + else { + for (i=0; i<n; i++) + wmSetPixel(pwc, y, x + i, + rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP] ); + } + DD_RELEASEDC; + } + else + { + GLuint i; + BYTE *Mem=Current->ScreenMem+y*Current->ScanWidth+x; + y = FLIP(y); + if (mask) { + for (i=0; i<n; i++) + if (mask[i]) + Mem[i] = GetNearestPaletteIndex(Current->hPal, + RGB(rgba[i][RCOMP], + rgba[i][GCOMP], + rgba[i][BCOMP])); + } + else { + for (i=0; i<n; i++) + Mem[i] = GetNearestPaletteIndex(Current->hPal, + RGB(rgba[i][RCOMP], + rgba[i][GCOMP], + rgba[i][BCOMP])); + } + } +} + +//--------------------------------------------------------------------------- + +/* Write a horizontal span of RGB color pixels with a boolean mask. */ +static void write_rgb_span( const GLcontext* ctx, + GLuint n, GLint x, GLint y, + const GLubyte rgb[][3], const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + PWMC pwc = Current; + + if (pwc->rgb_flag==GL_TRUE) + { + GLuint i; + HDC DC=DD_GETDC; + y=FLIP(y); + if (mask) { + for (i=0; i<n; i++) + if (mask[i]) + wmSetPixel(pwc, y, x + i, + rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]); + } + else { + for (i=0; i<n; i++) + wmSetPixel(pwc, y, x + i, + rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP] ); + } + DD_RELEASEDC; + } + else + { + GLuint i; + BYTE *Mem=Current->ScreenMem+y*Current->ScanWidth+x; + y = FLIP(y); + if (mask) { + for (i=0; i<n; i++) + if (mask[i]) + Mem[i] = GetNearestPaletteIndex(Current->hPal, + RGB(rgb[i][RCOMP], + rgb[i][GCOMP], + rgb[i][BCOMP])); + } + else { + for (i=0; i<n; i++) + Mem[i] = GetNearestPaletteIndex(Current->hPal, + RGB(rgb[i][RCOMP], + rgb[i][GCOMP], + rgb[i][BCOMP])); + } + } +} + +//--------------------------------------------------------------------------- + +/* + * Write a horizontal span of pixels with a boolean mask. The current color + * is used for all pixels. + */ +static void write_mono_rgba_span( const GLcontext* ctx, + GLuint n, GLint x, GLint y, + const GLchan color[4], const GLubyte mask[]) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + ULONG pixel = RGB( color[RCOMP], color[GCOMP], color[BCOMP] ); + GLuint i; + HDC DC=DD_GETDC; + PWMC pwc = Current; + assert(Current->rgb_flag==GL_TRUE); + y=FLIP(y); + if(Current->rgb_flag==GL_TRUE){ + for (i=0; i<n; i++) + if (mask[i]) + wmSetPixel(pwc,y,x+i,color[RCOMP], color[GCOMP], color[BCOMP]); + } + else { + for (i=0; i<n; i++) + if (mask[i]) + SetPixel(DC, y, x+i, pixel); + } + DD_RELEASEDC; +} + + + +/**********************************************************************/ +/***** Array-based pixel drawing *****/ +/**********************************************************************/ + + +/* Write an array of 32-bit index pixels with a boolean mask. */ +static void write_ci32_pixels( const GLcontext* ctx, + GLuint n, const GLint x[], const GLint y[], + const GLuint index[], const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + assert(Current->rgb_flag==GL_FALSE); + for (i=0; i<n; i++) { + if (mask[i]) { + BYTE *Mem=Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i]; + *Mem = index[i]; + } + } +} + + +//--------------------------------------------------------------------------- + + +/* + * Write an array of pixels with a boolean mask. The current color + * index is used for all pixels. + */ +static void write_mono_ci_pixels( const GLcontext* ctx, + GLuint n, + const GLint x[], const GLint y[], + GLuint colorIndex, const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + assert(Current->rgb_flag==GL_FALSE); + for (i=0; i<n; i++) { + if (mask[i]) { + BYTE *Mem=Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i]; + *Mem = colorIndex; + } + } +} + + +//--------------------------------------------------------------------------- + + +/* Write an array of RGBA pixels with a boolean mask. */ +static void write_rgba_pixels( const GLcontext* ctx, + GLuint n, const GLint x[], const GLint y[], + const GLubyte rgba[][4], const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + PWMC pwc = Current; + HDC DC=DD_GETDC; + assert(Current->rgb_flag==GL_TRUE); + for (i=0; i<n; i++) + if (mask[i]) + wmSetPixel(pwc, FLIP(y[i]), x[i], + rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); + DD_RELEASEDC; +} + + +//--------------------------------------------------------------------------- + + +/* + * Write an array of pixels with a boolean mask. The current color + * is used for all pixels. + */ +static void write_mono_rgba_pixels( const GLcontext* ctx, + GLuint n, + const GLint x[], const GLint y[], + const GLchan color[4], + const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + PWMC pwc = Current; + HDC DC=DD_GETDC; + assert(Current->rgb_flag==GL_TRUE); + for (i=0; i<n; i++) + if (mask[i]) + wmSetPixel(pwc, FLIP(y[i]),x[i],color[RCOMP], + color[GCOMP], color[BCOMP]); + DD_RELEASEDC; +} + +/**********************************************************************/ +/***** Read spans/arrays of pixels *****/ +/**********************************************************************/ + +/* Read a horizontal span of color-index pixels. */ +static void read_ci32_span( const GLcontext* ctx, GLuint n, GLint x, GLint y, + GLuint index[]) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + BYTE *Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x; + assert(Current->rgb_flag==GL_FALSE); + for (i=0; i<n; i++) + index[i]=Mem[i]; +} + +//--------------------------------------------------------------------------- + +/* Read an array of color index pixels. */ +static void read_ci32_pixels( const GLcontext* ctx, + GLuint n, const GLint x[], const GLint y[], + GLuint indx[], const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + assert(Current->rgb_flag==GL_FALSE); + for (i=0; i<n; i++) { + if (mask[i]) { + indx[i]=*(Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i]); + } + } +} + +//--------------------------------------------------------------------------- + +/* Read a horizontal span of color pixels. */ +static void read_rgba_span( const GLcontext* ctx, + GLuint n, GLint x, GLint y, + GLubyte rgba[][4] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + UINT i; + COLORREF Color; + HDC DC=DD_GETDC; + assert(Current->rgb_flag==GL_TRUE); + y = Current->height - y - 1; + for (i=0; i<n; i++) { + Color=GetPixel(DC,x+i,y); + rgba[i][RCOMP] = GetRValue(Color); + rgba[i][GCOMP] = GetGValue(Color); + rgba[i][BCOMP] = GetBValue(Color); + rgba[i][ACOMP] = 255; + } + DD_RELEASEDC; +} + +//--------------------------------------------------------------------------- + +/* Read an array of color pixels. */ +static void read_rgba_pixels( const GLcontext* ctx, + GLuint n, const GLint x[], const GLint y[], + GLubyte rgba[][4], const GLubyte mask[] ) +{ + GLD_context *gldCtx = GLD_GET_CONTEXT(ctx); + WMesaContext *Current = GLD_GET_WMESA_DRIVER(gldCtx); + GLuint i; + COLORREF Color; + HDC DC=DD_GETDC; + assert(Current->rgb_flag==GL_TRUE); + for (i=0; i<n; i++) { + if (mask[i]) { + GLint y2 = Current->height - y[i] - 1; + Color=GetPixel(DC,x[i],y2); + rgba[i][RCOMP] = GetRValue(Color); + rgba[i][GCOMP] = GetGValue(Color); + rgba[i][BCOMP] = GetBValue(Color); + rgba[i][ACOMP] = 255; + } + } + DD_RELEASEDC; +} + +//--------------------------------------------------------------------------- + +static void wmesa_update_state( + GLcontext *ctx, + GLuint new_state) +{ + _swrast_InvalidateState( ctx, new_state ); + _swsetup_InvalidateState( ctx, new_state ); + _vbo_InvalidateState( ctx, new_state ); + _tnl_InvalidateState( ctx, new_state ); +} + +//--------------------------------------------------------------------------- + +static void wmesa_viewport( + GLcontext *ctx, + GLint x, + GLint y, + GLsizei w, + GLsizei h) +{ +// ctx->Driver.ResizeBuffersMESA(ctx); +} + +//--------------------------------------------------------------------------- + +static void wmesa_update_state_first_time( + GLcontext *ctx, + GLuint new_state) +{ + struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference( ctx ); + TNLcontext *tnl = TNL_CONTEXT(ctx); + + /* + * XXX these function pointers could be initialized just once during + * context creation since they don't depend on any state changes. + * kws - This is true - this function gets called a lot and it + * would be good to minimize setting all this when not needed. + */ + // Good idea, so I'll do it. KeithH. :-) + + ctx->Driver.GetString = _gldGetStringGeneric; + ctx->Driver.UpdateState = wmesa_update_state; + ctx->Driver.DrawBuffer = set_draw_buffer; + ctx->Driver.ResizeBuffers = _swrast_alloc_buffers; + ctx->Driver.GetBufferSize = buffer_size; + + ctx->Driver.Viewport = wmesa_viewport; + + ctx->Driver.Accum = _swrast_Accum; + ctx->Driver.Bitmap = _swrast_Bitmap; + ctx->Driver.Clear = clear; + + ctx->Driver.Flush = flush; + ctx->Driver.ClearIndex = clear_index; + ctx->Driver.ClearColor = clear_color; + ctx->Driver.Enable = enable; + + ctx->Driver.CopyPixels = _swrast_CopyPixels; + ctx->Driver.DrawPixels = _swrast_DrawPixels; + ctx->Driver.ReadPixels = _swrast_ReadPixels; + + ctx->Driver.ChooseTextureFormat = _mesa_choose_tex_format; + ctx->Driver.TexImage1D = _mesa_store_teximage1d; + ctx->Driver.TexImage2D = _mesa_store_teximage2d; + ctx->Driver.TexImage3D = _mesa_store_teximage3d; + ctx->Driver.TexSubImage1D = _mesa_store_texsubimage1d; + ctx->Driver.TexSubImage2D = _mesa_store_texsubimage2d; + ctx->Driver.TexSubImage3D = _mesa_store_texsubimage3d; + ctx->Driver.TestProxyTexImage = _mesa_test_proxy_teximage; + + ctx->Driver.CopyTexImage1D = _swrast_copy_teximage1d; + ctx->Driver.CopyTexImage2D = _swrast_copy_teximage2d; + ctx->Driver.CopyTexSubImage1D = _swrast_copy_texsubimage1d; + ctx->Driver.CopyTexSubImage2D = _swrast_copy_texsubimage2d; + ctx->Driver.CopyTexSubImage3D = _swrast_copy_texsubimage3d; + ctx->Driver.CopyColorTable = _swrast_CopyColorTable; + ctx->Driver.CopyColorSubTable = _swrast_CopyColorSubTable; + ctx->Driver.CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D; + ctx->Driver.CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D; + + // Does not apply for Mesa 5.x + //ctx->Driver.BaseCompressedTexFormat = _mesa_base_compressed_texformat; + //ctx->Driver.CompressedTextureSize = _mesa_compressed_texture_size; + //ctx->Driver.GetCompressedTexImage = _mesa_get_compressed_teximage; + + swdd->SetBuffer = set_read_buffer; + + + /* Pixel/span writing functions: */ + swdd->WriteRGBASpan = write_rgba_span; + swdd->WriteRGBSpan = write_rgb_span; + swdd->WriteMonoRGBASpan = write_mono_rgba_span; + swdd->WriteRGBAPixels = write_rgba_pixels; + swdd->WriteMonoRGBAPixels = write_mono_rgba_pixels; + swdd->WriteCI32Span = write_ci32_span; + swdd->WriteCI8Span = write_ci8_span; + swdd->WriteMonoCISpan = write_mono_ci_span; + swdd->WriteCI32Pixels = write_ci32_pixels; + swdd->WriteMonoCIPixels = write_mono_ci_pixels; + + swdd->ReadCI32Span = read_ci32_span; + swdd->ReadRGBASpan = read_rgba_span; + swdd->ReadCI32Pixels = read_ci32_pixels; + swdd->ReadRGBAPixels = read_rgba_pixels; + + + tnl->Driver.RunPipeline = _tnl_run_pipeline; + + wmesa_update_state(ctx, new_state); +} + +//--------------------------------------------------------------------------- +// Driver interface functions +//--------------------------------------------------------------------------- + +BOOL gldCreateDrawable_MesaSW( + DGL_ctx *pCtx, + BOOL bPersistantInterface, + BOOL bPersistantBuffers) +{ + WMesaContext *c; + GLboolean true_color_flag; + GLboolean rgb_flag = GL_TRUE; + GLboolean db_flag = GL_TRUE; + + if (pCtx == NULL) + return FALSE; + + c = (struct wmesa_context * ) calloc(1,sizeof(struct wmesa_context)); + if (!c) + return FALSE; + + pCtx->glPriv = c; + + c->hDC = pCtx->hDC; + c->Window = pCtx->hWnd; + + true_color_flag = GetDeviceCaps(pCtx->hDC, BITSPIXEL) > 8; + + +#ifdef DITHER + if ((true_color_flag==GL_FALSE) && (rgb_flag == GL_TRUE)){ + c->dither_flag = GL_TRUE; + c->hPalHalfTone = WinGCreateHalftonePalette(); + } + else + c->dither_flag = GL_FALSE; +#else + c->dither_flag = GL_FALSE; +#endif + + + if (rgb_flag==GL_FALSE) + { + c->rgb_flag = GL_FALSE; +#if 0 + /* Old WinG stuff???? */ + c->db_flag = db_flag =GL_TRUE; /* WinG requires double buffering */ + printf("Single buffer is not supported in color index mode, ", + "setting to double buffer.\n"); +#endif + } + else + { + c->rgb_flag = GL_TRUE; + } + +// db_flag = pCtx->lpPF->pfd.dwFlags & PFD_DOUBLEBUFFER ? GL_TRUE : GL_FALSE; + db_flag = GL_TRUE; // Force double-buffer + if (db_flag) { + c->db_flag = 1; + /* Double buffered */ + { + wmCreateBackingStore(c, pCtx->dwWidth, pCtx->dwHeight); + + } + } else { + /* Single Buffered */ + if (c->rgb_flag) + c->db_flag = 0; + } + + c->bEmulateSingleBuffer = (pCtx->lpPF->pfd.dwFlags & PFD_DOUBLEBUFFER) + ? FALSE : TRUE; + + return TRUE; +} + +//--------------------------------------------------------------------------- + +BOOL gldResizeDrawable_MesaSW( + DGL_ctx *ctx, + BOOL bDefaultDriver, + BOOL bPersistantInterface, + BOOL bPersistantBuffers) +{ + WMesaContext *c; + + if (ctx == NULL) + return FALSE; + + c = ctx->glPriv; + if (c == NULL) + return FALSE; + + c->hDC = ctx->hDC; + c->Window = ctx->hWnd; +// c->width = ctx->dwWidth; +// c->height = ctx->dwHeight; + + if (c->db_flag) { + wmDeleteBackingStore(c); + wmCreateBackingStore(c, ctx->dwWidth, ctx->dwHeight); + } + + return TRUE; +} + +//--------------------------------------------------------------------------- + +BOOL gldDestroyDrawable_MesaSW( + DGL_ctx *ctx) +{ + WMesaContext *c; + + if (ctx == NULL) + return FALSE; + + c = ctx->glPriv; + if (c == NULL) + return FALSE; + + if (c->hPalHalfTone != NULL) + DeleteObject(c->hPalHalfTone); + + if (c->db_flag) + wmDeleteBackingStore(c); + + free(c); + + ctx->glPriv = NULL; + + return TRUE; +} + +//--------------------------------------------------------------------------- + +BOOL gldCreatePrivateGlobals_MesaSW(void) +{ + // Mesa Software driver needs no private globals + return TRUE; +} + +//--------------------------------------------------------------------------- + +BOOL gldDestroyPrivateGlobals_MesaSW(void) +{ + // Mesa Software driver needs no private globals + return TRUE; +} + +//--------------------------------------------------------------------------- + +BOOL gldBuildPixelformatList_MesaSW(void) +{ + // Release any existing pixelformat list + if (glb.lpPF) { + free(glb.lpPF); + } + + glb.nPixelFormatCount = 0; + glb.lpPF = NULL; + + glb.lpPF = (DGL_pixelFormat *)calloc(2, sizeof(DGL_pixelFormat)); + if (glb.lpPF == NULL) + return FALSE; + // Single-buffered + memcpy(&glb.lpPF[0], &pfTemplateMesaSW, sizeof(DGL_pixelFormat)); + glb.lpPF[0].pfd.dwFlags &= ~PFD_DOUBLEBUFFER; // Remove doublebuffer flag + // Double-buffered + memcpy(&glb.lpPF[1], &pfTemplateMesaSW, sizeof(DGL_pixelFormat)); + glb.nPixelFormatCount = 2; + + // Mark list as 'current' + glb.bPixelformatsDirty = FALSE; + + return TRUE; +} + +//--------------------------------------------------------------------------- + +BOOL gldInitialiseMesa_MesaSW( + DGL_ctx *gld) +{ + GLcontext *ctx; + + if (gld == NULL) + return FALSE; + + ctx = gld->glCtx; + + // Set max texture size to 256 + ctx->Const.MaxTextureLevels = 8; + + // Multitexture enable/disable + ctx->Const.MaxTextureUnits = (glb.bMultitexture) ? MAX_TEXTURE_UNITS : 1; + + /* Initialize the software rasterizer and helper modules.*/ + + // Added this to force max texture diminsion to 256. KeithH + ctx->Const.MaxTextureLevels = 8; + ctx->Const.MaxDrawBuffers = 1; + + _mesa_enable_sw_extensions(ctx); + _mesa_enable_imaging_extensions(ctx); + _mesa_enable_1_3_extensions(ctx); + +// _swrast_CreateContext( ctx ); +// _vbo_CreateContext( ctx ); +// _tnl_CreateContext( ctx ); +// _swsetup_CreateContext( ctx ); + + _swsetup_Wakeup( ctx ); + + wmesa_update_state_first_time(ctx, ~0); + + return TRUE; +} + +//--------------------------------------------------------------------------- + +BOOL gldSwapBuffers_MesaSW( + DGL_ctx *ctx, + HDC hDC, + HWND hWnd) +{ + WMesaContext *c; + + if (ctx == NULL) + return FALSE; + + c = ctx->glPriv; + if (c == NULL) + return FALSE; + + /* If we're swapping the buffer associated with the current context + * we have to flush any pending rendering commands first. + */ + + // Altered to respect bEmulateSingleBuffer. KeithH +// if (c->db_flag) + if (!c->bEmulateSingleBuffer) + wmFlush(c, hDC); + + return TRUE; +} + +//--------------------------------------------------------------------------- + +PROC gldGetProcAddress_MesaSW( + LPCSTR a) +{ + int i; + PROC proc = NULL; + + for (i=0; GLD_extList[i].proc; i++) { + if (!strcmp(a, GLD_extList[i].name)) { + proc = GLD_extList[i].proc; + break; + } + } + + gldLogPrintf(GLDLOG_INFO, "GetProcAddress: %s (%s)", a, proc ? "OK" : "Failed"); + + return proc; +} + +//--------------------------------------------------------------------------- + +BOOL gldGetDisplayMode_MesaSW( + DGL_ctx *ctx, + GLD_displayMode *glddm) +{ + HDC hdcDesktop; + + if (glddm == NULL) + return FALSE; + + // + // A bit hacky... KeithH + // + + hdcDesktop = GetDC(NULL); + glddm->Width = GetDeviceCaps(hdcDesktop, HORZRES); + glddm->Height = GetDeviceCaps(hdcDesktop, VERTRES); + glddm->BPP = GetDeviceCaps(hdcDesktop, BITSPIXEL); + glddm->Refresh = 0; + ReleaseDC(0, hdcDesktop); + + return TRUE; +} + +//--------------------------------------------------------------------------- + |