diff options
Diffstat (limited to 'src/mesa/drivers/windows/wmesaOld.c')
| -rw-r--r-- | src/mesa/drivers/windows/wmesaOld.c | 2737 |
1 files changed, 2737 insertions, 0 deletions
diff --git a/src/mesa/drivers/windows/wmesaOld.c b/src/mesa/drivers/windows/wmesaOld.c new file mode 100644 index 00000000000..afaeecebcf4 --- /dev/null +++ b/src/mesa/drivers/windows/wmesaOld.c @@ -0,0 +1,2737 @@ +/*
+ * File name : wmesa.c
+ * Version : 2.3
+ *
+ * Display driver for Mesa 2.3 under
+ * Windows95 and WindowsNT
+ *
+ * Copyright (C) 1996- Li Wei
+ * Address : Institute of Artificial Intelligence
+ * : & Robotics
+ * : Xi'an Jiaotong University
+ * Email : [email protected]
+ * Web page : http://sun.aiar.xjtu.edu.cn
+ *
+ * This file and its associations are partially borrowed from the
+ * Windows NT driver for Mesa 1.8 , written by Mark Leaming
+ * ([email protected]).
+ */
+
+
+/*
+ * $Log: wmesaOld.c,v $ + * Revision 1.1 1999/08/19 00:55:42 jtg + * Initial revision + * + * Revision 1.2 1999/01/03 03:08:57 brianp + * Ted Jump's changes + *
+ * Revision 1.0 1997/06/14 17:51:00 CST by Li Wei([email protected])
+ * New display driver for Mesa 2.x using Microsoft Direct Draw
+ * Initial vision
+ */
+
+
+#define WMESA_STEREO_C
+
+#include <windows.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <GL/wmesa.h>
+#include "wmesadef.h"
+#include "context.h"
+#include "dd.h"
+#include "xform.h"
+#include "vb.h"
+#include "matrix.h"
+#include "depth.h"
+
+#ifdef PROFILE
+// #include "profile.h"
+#endif
+
+#ifdef DITHER
+ #include <wing.h>
+#endif
+
+#ifdef __CYGWIN32__
+#include "macros.h"
+#include <string.h>
+#define CopyMemory memcpy
+#endif
+#include "mesa_extend.h"
+#include "colors.h"
+
+#if !defined(NO_STEREO)
+
+ #include "gl\glu.h"
+ #include "stereo.h"
+
+#endif
+#if !defined(NO_PARALLEL)
+// #include "parallel.h"
+#endif
+
+struct DISPLAY_OPTIONS displayOptions;
+
+GLenum stereoCompile = GL_FALSE ;
+GLenum stereoShowing = GL_FALSE ;
+GLenum stereoBuffer = GL_FALSE;
+#if !defined(NO_STEREO)
+GLint displayList = MAXIMUM_DISPLAY_LIST ;
+#endif
+GLint stereo_flag = 0 ;
+
+/* end of added code*/
+
+static PWMC Current = NULL;
+WMesaContext WC = NULL;
+
+#ifdef NDEBUG
+ #define assert(ignore) ((void) 0)
+#else
+ void Mesa_Assert(void *Cond,void *File,unsigned Line)
+ {
+ char Msg[512];
+ sprintf(Msg,"%s %s %d",Cond,File,Line);
+ MessageBox(NULL,Msg,"Assertion failed.",MB_OK);
+ exit(1);
+ }
+ #define assert(e) if (!e) Mesa_Assert(#e,__FILE__,__LINE__);
+#endif
+
+//#define DD_GETDC (Current->hDC )
+#define DD_GETDC ((Current->db_flag) ? Current->dib.hDC : Current->hDC )
+//#define DD_GETDC ((Current->db_flag) ? Current->hDCPrimary : Current->hDCBack )
+#define DD_RELEASEDC
+
+//#define BEGINGDICALL if(Current->rgb_flag)wmFlushBits(Current);
+#define BEGINGDICALL
+//#define ENDGDICALL if(Current->rgb_flag)wmGetBits(Current);
+#define ENDGDICALL
+
+//#define FLIP(Y) (Current->dither_flag? Y : Current->height-(Y)-1)
+//#define FLIP(Y) (Current->height-(Y)-1)
+//#define FLIP(Y) Y
+#define FLIP(Y) (Current->db_flag? Y: Current->height-(Y)-1)
+#define STARTPROFILE
+#define ENDPROFILE(PARA)
+
+#define DITHER_RGB_TO_8BIT_SETUP \
+ GLubyte pixelDithered;
+
+#define DITHER_RGB_TO_8BIT(red, green, blue, pixel, scanline) \
+{ \
+ char unsigned redtemp, greentemp, bluetemp, paletteindex; \
+ 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]); \
+ paletteindex = redtemp + aTimes6[greentemp] + aTimes36[bluetemp]; \
+ pixelDithered = aWinGHalftoneTranslation[paletteindex]; \
+}
+
+
+#ifdef DDRAW
+ static BOOL DDInit( WMesaContext wc, HWND hwnd);
+ static void DDFree( WMesaContext wc);
+ static HRESULT DDRestoreAll( WMesaContext wc );
+ static void DDDeleteOffScreen(WMesaContext wc);
+ static BOOL DDCreateOffScreen(WMesaContext wc);
+#endif
+
+static void FlushToFile(PWMC pwc, PSTR szFile);
+
+BOOL wmCreateBackingStore(PWMC pwc, long lxSize, long lySize);
+BOOL wmDeleteBackingStore(PWMC pwc);
+void wmCreatePalette( PWMC pwdc );
+BOOL wmSetDibColors(PWMC pwc);
+void wmSetPixel(PWMC pwc, int iScanLine, int iPixel, BYTE r, BYTE g, BYTE b);
+
+void wmCreateDIBSection(
+ HDC hDC,
+ PWMC pwc, // handle of device context
+ CONST BITMAPINFO *pbmi, // address of structure containing bitmap size, format, and color data
+ UINT iUsage // color data type indicator: RGB values or palette indices
+ );
+
+
+void WMesaViewport( GLcontext *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height );
+
+static triangle_func choose_triangle_function( GLcontext *ctx );
+
+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 sets the color table of a DIB section
+// to match that of the destination DC
+//
+BOOL /*WINAPI*/ 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);
+}
+
+
+//
+// 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;
+}
+
+
+//
+// This function creates the DIB section that is used for combined
+// GL and GDI calls
+//
+BOOL /*WINAPI*/ 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;
+
+ wmCreateDIBSection(hdc, pwc, pbmi, iUsage);
+
+ if ((iUsage == DIB_PAL_COLORS) && !(pwc->hGLPalette)) {
+ wmCreatePalette( pwc );
+ wmSetDibColors( pwc );
+ }
+ wmSetPixelFormat(pwc, pwc->hDC);
+ return(TRUE);
+
+}
+
+
+//
+// This function copies one scan line in a DIB section to another
+//
+BOOL GLWINAPI wmSetDIBits(PWMC pwc, UINT uiScanWidth, UINT uiNumScans, UINT nBypp, UINT uiNewWidth, LPBYTE pBits)
+{
+ UINT uiScans = 0;
+ LPBYTE pDest = pwc->pbPixels;
+ DWORD dwNextScan = uiScanWidth;
+ DWORD dwNewScan = uiNewWidth;
+ DWORD dwScanWidth = (uiScanWidth * nBypp);
+
+ //
+ // We need to round up to the nearest DWORD
+ // and multiply by the number of bytes per
+ // pixel
+ //
+ dwNextScan = (((dwNextScan * nBypp)+ 3) & ~3);
+ dwNewScan = (((dwNewScan * nBypp)+ 3) & ~3);
+
+ for(uiScans = 0; uiScans < uiNumScans; uiScans++){
+ CopyMemory(pDest, pBits, dwScanWidth);
+ pBits += dwNextScan;
+ pDest += dwNewScan;
+ }
+
+ return(TRUE);
+
+}
+
+
+BOOL wmFlush(PWMC pwc);
+
+/*
+ * Useful macros:
+ Modified from file osmesa.c
+ */
+
+
+#define PIXELADDR(X,Y) ((GLubyte *)Current->pbPixels + (Current->height-Y-1)* Current->ScanWidth + (X)*nBypp)
+#define PIXELADDR1( X, Y ) \
+ ((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X))
+#define PIXELADDR2( X, Y ) \
+ ((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X)*2)
+#define PIXELADDR4( X, Y ) \
+ ((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X)*4)
+
+
+BYTE DITHER_RGB_2_8BIT( int r, int g, int b, int x, int y);
+
+/* Finish all pending operations and synchronize. */
+static void finish(GLcontext* ctx)
+{
+ /* No op */
+}
+
+
+//
+// We cache all gl draw routines until a flush is made
+//
+static void flush(GLcontext* ctx)
+{
+ STARTPROFILE
+ if((Current->rgb_flag /*&& !(Current->dib.fFlushed)*/&&!(Current->db_flag))
+ ||(!Current->rgb_flag))
+ {
+ wmFlush(Current);
+ }
+ ENDPROFILE(flush)
+
+}
+
+
+
+/*
+ * Set the color index used to clear the color buffer.
+ */
+static void clear_index(GLcontext* ctx, GLuint index)
+{
+ STARTPROFILE
+ Current->clearpixel = index;
+ ENDPROFILE(clear_index)
+}
+
+
+
+/*
+ * Set the color used to clear the color buffer.
+ */
+static void clear_color( GLcontext* ctx, GLubyte r, GLubyte g, GLubyte b, GLubyte a )
+{
+ STARTPROFILE
+ Current->clearpixel=RGB(r, g, b );
+ ENDPROFILE(clear_color)
+}
+
+
+
+/*
+ * Clear the specified region of the color buffer using the clear color
+ * or index as specified by one of the two functions above.
+ */
+static void clear(GLcontext* ctx,
+ GLboolean all,GLint x, GLint y, GLint width, GLint height )
+{
+ DWORD dwColor;
+ WORD wColor;
+ BYTE bColor;
+ LPDWORD lpdw = (LPDWORD)Current->pbPixels;
+ LPWORD lpw = (LPWORD)Current->pbPixels;
+ LPBYTE lpb = Current->pbPixels;
+ int lines;
+
+ STARTPROFILE
+
+ if (all){
+ x=y=0;
+ width=Current->width;
+ height=Current->height;
+ }
+ if(Current->db_flag==GL_TRUE){
+ UINT nBypp = Current->cColorBits / 8;
+ int i = 0;
+ int iSize;
+
+ if(nBypp ==1 ){
+ /* Need rectification */
+ 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));
+ }
+
+ 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;
+ do{
+ lpb += Current->ScanWidth;
+ memcpy(lpb, Current->pbPixels, iSize*4);
+ i++;
+ }
+ while(i<lines-1);
+ }
+ else{ // For 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;
+ }
+
+
+
+ ENDPROFILE(clear)
+}
+
+
+
+/* Set the current color index. */
+static void set_index(GLcontext* ctx, GLuint index)
+{
+ STARTPROFILE
+ Current->pixel=index;
+ ENDPROFILE(set_index)
+}
+
+
+
+/* Set the current RGBA color. */
+static void set_color( GLcontext* ctx, GLubyte r, GLubyte g, GLubyte b, GLubyte a )
+{
+ STARTPROFILE
+ Current->pixel = RGB( r, g, b );
+ ENDPROFILE(set_color)
+}
+
+
+
+/* Set the index mode bitplane mask. */
+static GLboolean index_mask(GLcontext* ctx, GLuint mask)
+{
+ /* can't implement */
+ return GL_FALSE;
+}
+
+
+
+/* Set the RGBA drawing mask. */
+static GLboolean color_mask( GLcontext* ctx,
+ GLboolean rmask, GLboolean gmask,
+ GLboolean bmask, GLboolean amask)
+{
+ /* can't implement */
+ return GL_FALSE;
+}
+
+
+
+/*
+ * Set the pixel logic operation. Return GL_TRUE if the device driver
+ * can perform the operation, otherwise return GL_FALSE. If GL_FALSE
+ * is returned, the logic op will be done in software by Mesa.
+ */
+GLboolean logicop( GLcontext* ctx, GLenum op )
+{
+ /* can't implement */
+ return GL_FALSE;
+}
+
+
+static void dither( GLcontext* ctx, GLboolean enable )
+{
+ 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_buffer( GLcontext* ctx, GLenum mode )
+{
+ STARTPROFILE
+ /* TODO: this could be better */
+ if (mode==GL_FRONT || mode==GL_BACK) {
+ return GL_TRUE;
+ }
+ else {
+ return GL_FALSE;
+ }
+ ENDPROFILE(set_buffer)
+}
+
+
+
+/* Return characteristics of the output buffer. */
+static void buffer_size( GLcontext* ctx, GLuint *width, GLuint *height /*, GLuint *depth */)
+{
+
+ int New_Size;
+ RECT CR;
+
+ STARTPROFILE
+ GetClientRect(Current->Window,&CR);
+
+ *width=CR.right;
+ *height=CR.bottom;
+// *depth = Current->depth;
+
+ 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){
+#ifdef DDRAW
+ DDDeleteOffScreen(Current);
+ DDCreateOffScreen(Current);
+#else
+ if (Current->rgb_flag==GL_TRUE && Current->dither_flag!=GL_TRUE){
+ wmDeleteBackingStore(Current);
+ wmCreateBackingStore(Current, Current->width, Current->height);
+ }
+#endif
+ }
+
+// Resize OsmesaBuffer if in Parallel mode
+#if !defined(NO_PARALLEL)
+ if(parallelFlag)
+ PRSizeRenderBuffer(Current->width, Current->height,Current->ScanWidth,
+ Current->rgb_flag == GL_TRUE ? Current->pbPixels: Current->ScreenMem);
+#endif
+ }
+ ENDPROFILE(buffer_size)
+}
+
+
+
+/**********************************************************************/
+/***** Accelerated point, line, polygon rendering *****/
+/**********************************************************************/
+
+
+static void fast_rgb_points( GLcontext* ctx, GLuint first, GLuint last )
+{
+ GLuint i;
+ // HDC DC=DD_GETDC;
+ PWMC pwc = Current;
+
+ STARTPROFILE
+
+ if (Current->gl_ctx->VB->MonoColor) {
+ /* all drawn with current color */
+ for (i=first;i<=last;i++) {
+ if (!Current->gl_ctx->VB->ClipMask[i]) {
+ int x, y;
+ x = (GLint) Current->gl_ctx->VB->Win[i][0];
+ y = FLIP( (GLint) Current->gl_ctx->VB->Win[i][1] );
+ wmSetPixel(pwc, y,x,GetRValue(Current->pixel),
+ GetGValue(Current->pixel), GetBValue(Current->pixel));
+ }
+ }
+ }
+ else {
+ /* draw points of different colors */
+ for (i=first;i<=last;i++) {
+ if (!Current->gl_ctx->VB->ClipMask[i]) {
+ int x, y;
+ unsigned long pixel=RGB(Current->gl_ctx->VB->Color[i][0]*255.0,
+ Current->gl_ctx->VB->Color[i][1]*255.0,
+ Current->gl_ctx->VB->Color[i][2]*255.0);
+ x = (GLint) Current->gl_ctx->VB->Win[i][0];
+ y = FLIP( (GLint) Current->gl_ctx->VB->Win[i][1] );
+ wmSetPixel(pwc, y,x,Current->gl_ctx->VB->Color[i][0]*255.0,
+ Current->gl_ctx->VB->Color[i][1]*255.0,
+ Current->gl_ctx->VB->Color[i][2]*255.0);
+ }
+ }
+ }
+// DD_RELEASEDC;
+ ENDPROFILE(fast_rgb_points)
+}
+
+
+
+/* Return pointer to accerated points function */
+extern points_func choose_points_function( GLcontext* ctx )
+{
+ STARTPROFILE
+ if (ctx->Point.Size==1.0 && !ctx->Point.SmoothFlag && ctx->RasterMask==0
+ && !ctx->Texture.Enabled && ctx->Visual->RGBAflag) {
+ ENDPROFILE(choose_points_function)
+ return fast_rgb_points;
+ }
+ else {
+ ENDPROFILE(choose_points_function)
+ return NULL;
+ }
+}
+
+
+
+/* Draw a line using the color specified by Current->gl_ctx->VB->Color[pv] */
+static void fast_flat_rgb_line( GLcontext* ctx, GLuint v0, GLuint v1, GLuint pv )
+{
+ STARTPROFILE
+ int x0, y0, x1, y1;
+ unsigned long pixel;
+ HDC DC=DD_GETDC;
+ HPEN Pen;
+ HPEN Old_Pen;
+
+ if (Current->gl_ctx->VB->MonoColor) {
+ pixel = Current->pixel; /* use current color */
+ }
+ else {
+ pixel = RGB(Current->gl_ctx->VB->Color[pv][0]*255.0, Current->gl_ctx->VB->Color[pv][1]*255.0, Current->gl_ctx->VB->Color[pv][2]*255.0);
+ }
+
+ x0 = (int) Current->gl_ctx->VB->Win[v0][0];
+ y0 = FLIP( (int) Current->gl_ctx->VB->Win[v0][1] );
+ x1 = (int) Current->gl_ctx->VB->Win[v1][0];
+ y1 = FLIP( (int) Current->gl_ctx->VB->Win[v1][1] );
+
+
+ BEGINGDICALL
+
+ Pen=CreatePen(PS_SOLID,1,pixel);
+ Old_Pen=SelectObject(DC,Pen);
+ MoveToEx(DC,x0,y0,NULL);
+ LineTo(DC,x1,y1);
+ SelectObject(DC,Old_Pen);
+ DeleteObject(Pen);
+ DD_RELEASEDC;
+
+ ENDGDICALL
+
+ ENDPROFILE(fast_flat_rgb_line)
+}
+
+
+
+/* Return pointer to accerated line function */
+static line_func choose_line_function( GLcontext* ctx )
+{
+ STARTPROFILE
+ if (ctx->Line.Width==1.0 && !ctx->Line.SmoothFlag && !ctx->Line.StippleFlag
+ && ctx->Light.ShadeModel==GL_FLAT && ctx->RasterMask==0
+ && !ctx->Texture.Enabled && Current->rgb_flag) {
+ ENDPROFILE(choose_line_function)
+ return fast_flat_rgb_line;
+ }
+ else {
+ ENDPROFILE(choose_line_function)
+ return NULL;
+ }
+}
+
+
+/**********************************************************************/
+/***** Span-based pixel drawing *****/
+/**********************************************************************/
+
+
+/* Write a horizontal span of color-index pixels with a boolean mask. */
+static void write_index_span( GLcontext* ctx,
+ GLuint n, GLint x, GLint y,
+ const GLuint index[],
+ const GLubyte mask[] )
+{
+ STARTPROFILE
+ 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];
+ ENDPROFILE(write_index_span)
+}
+
+
+
+/*
+ * Write a horizontal span of pixels with a boolean mask. The current
+ * color index is used for all pixels.
+ */
+static void write_monoindex_span(GLcontext* ctx,
+ GLuint n,GLint x,GLint y,
+ const GLubyte mask[])
+{
+ STARTPROFILE
+ 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]=Current->pixel;
+ ENDPROFILE(write_monoindex_span)
+}
+
+/*
+ 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 color pixels with a boolean mask. */
+static void write_color_span( GLcontext* ctx,
+ GLuint n, GLint x, GLint y,
+ const GLubyte
+ red[], const GLubyte green[],
+ const GLubyte blue[], const GLubyte alpha[],
+ const GLubyte mask[] )
+{
+ STARTPROFILE
+
+ 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,red[i], green[i], blue[i]);
+ }
+
+ else {
+ for (i=0; i<n; i++)
+ wmSetPixel(pwc, y, x + i, red[i], green[i], blue[i]);
+ }
+
+ 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(red[i],green[i],blue[i]));
+ }
+ else {
+ for (i=0; i<n; i++)
+ Mem[i]=GetNearestPaletteIndex(Current->hPal,RGB(red[i],green[i],blue[i]));
+ }
+ }
+ ENDPROFILE(write_color_span)
+
+}
+
+/*
+ * Write a horizontal span of pixels with a boolean mask. The current color
+ * is used for all pixels.
+ */
+static void write_monocolor_span( GLcontext* ctx,
+ GLuint n, GLint x, GLint y,
+ const GLubyte mask[])
+{
+ STARTPROFILE
+ 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])
+// Trying
+ wmSetPixel(pwc,y,x+i,GetRValue(Current->pixel), GetGValue(Current->pixel), GetBValue(Current->pixel));
+ }
+ else {
+ for (i=0; i<n; i++)
+ if (mask[i])
+ SetPixel(DC, y, x+i, Current->pixel);
+ }
+
+ DD_RELEASEDC;
+
+ ENDPROFILE(write_monocolor_span)
+}
+
+
+
+/**********************************************************************/
+/***** Array-based pixel drawing *****/
+/**********************************************************************/
+
+
+/* Write an array of pixels with a boolean mask. */
+static void write_index_pixels( GLcontext* ctx,
+ GLuint n, const GLint x[], const GLint y[],
+ const GLuint index[], const GLubyte mask[] )
+{
+ STARTPROFILE
+ 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];
+ }
+ }
+ ENDPROFILE(write_index_pixels)
+}
+
+
+
+/*
+ * Write an array of pixels with a boolean mask. The current color
+ * index is used for all pixels.
+ */
+static void write_monoindex_pixels( GLcontext* ctx,
+ GLuint n,
+ const GLint x[], const GLint y[],
+ const GLubyte mask[] )
+{
+ STARTPROFILE
+ 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 = Current->pixel;
+ }
+ }
+ ENDPROFILE(write_monoindex_pixels)
+}
+
+
+
+/* Write an array of pixels with a boolean mask. */
+static void write_color_pixels( GLcontext* ctx,
+ GLuint n, const GLint x[], const GLint y[],
+ const GLubyte r[], const GLubyte g[],
+ const GLubyte b[], const GLubyte a[],
+ const GLubyte mask[] )
+{
+ STARTPROFILE
+ 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],r[i],g[i],b[i]);
+ DD_RELEASEDC;
+ ENDPROFILE(write_color_pixels)
+}
+
+
+
+/*
+ * Write an array of pixels with a boolean mask. The current color
+ * is used for all pixels.
+ */
+static void write_monocolor_pixels( GLcontext* ctx,
+ GLuint n,
+ const GLint x[], const GLint y[],
+ const GLubyte mask[] )
+{
+ STARTPROFILE
+ 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],GetRValue(Current->pixel),
+ GetGValue(Current->pixel), GetBValue(Current->pixel));
+ DD_RELEASEDC;
+ ENDPROFILE(write_monocolor_pixels)
+}
+
+
+
+/**********************************************************************/
+/***** Read spans/arrays of pixels *****/
+/**********************************************************************/
+
+
+/* Read a horizontal span of color-index pixels. */
+static void read_index_span( GLcontext* ctx, GLuint n, GLint x, GLint y, GLuint index[])
+{
+ STARTPROFILE
+ 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];
+ ENDPROFILE(read_index_span)
+
+}
+
+
+
+
+/* Read an array of color index pixels. */
+static void read_index_pixels( GLcontext* ctx,
+ GLuint n, const GLint x[], const GLint y[],
+ GLuint indx[], const GLubyte mask[] )
+{
+ STARTPROFILE
+ 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]);
+ }
+ }
+ ENDPROFILE(read_index_pixels)
+}
+
+
+
+/* Read a horizontal span of color pixels. */
+static void read_color_span( GLcontext* ctx,
+ GLuint n, GLint x, GLint y,
+ GLubyte red[], GLubyte green[],
+ GLubyte blue[], GLubyte alpha[] )
+{
+ STARTPROFILE
+ UINT i;
+ COLORREF Color;
+ HDC DC=DD_GETDC;
+ assert(Current->rgb_flag==GL_TRUE);
+ y=FLIP(y);
+ for (i=0; i<n; i++)
+ {
+ Color=GetPixel(DC,x+i,y);
+ red[i]=GetRValue(Color);
+ green[i]=GetGValue(Color);
+ blue[i]=GetBValue(Color);
+ alpha[i]=255;
+ }
+ DD_RELEASEDC;
+ memset(alpha,0,n*sizeof(GLint));
+ ENDPROFILE(read_color_span)
+}
+
+
+/* Read an array of color pixels. */
+static void read_color_pixels( GLcontext* ctx,
+ GLuint n, const GLint x[], const GLint y[],
+ GLubyte red[], GLubyte green[],
+ GLubyte blue[], GLubyte alpha[],
+ const GLubyte mask[] )
+{
+ STARTPROFILE
+ GLuint i;
+ COLORREF Color;
+ HDC DC=DD_GETDC;
+ assert(Current->rgb_flag==GL_TRUE);
+ for (i=0; i<n; i++) {
+ if (mask[i]) {
+ Color=GetPixel(DC,x[i],FLIP(y[i]));
+ red[i]=GetRValue(Color);
+ green[i]=GetGValue(Color);
+ blue[i]=GetBValue(Color);
+ alpha[i]=255;
+ }
+ }
+ DD_RELEASEDC;
+ memset(alpha,0,n*sizeof(GLint));
+ ENDPROFILE(read_color_pixels)
+}
+
+
+
+/**********************************************************************/
+/**********************************************************************/
+
+
+
+void setup_DD_pointers( GLcontext* ctx )
+{
+ ctx->Driver.UpdateState = setup_DD_pointers;
+ ctx->Driver.GetBufferSize = buffer_size;
+ ctx->Driver.Finish = finish;
+ ctx->Driver.Flush = flush;
+
+ ctx->Driver.ClearIndex = clear_index;
+ ctx->Driver.ClearColor = clear_color;
+ ctx->Driver.Clear = clear;
+
+ ctx->Driver.Index = set_index;
+ ctx->Driver.Color = set_color;
+ ctx->Driver.IndexMask = index_mask;
+ ctx->Driver.ColorMask = color_mask;
+
+ ctx->Driver.LogicOp = logicop;
+ ctx->Driver.Dither = dither;
+
+ ctx->Driver.SetBuffer = set_buffer;
+ ctx->Driver.GetBufferSize = buffer_size;
+
+ ctx->Driver.PointsFunc = choose_points_function(ctx);
+ ctx->Driver.LineFunc = choose_line_function(ctx);
+ ctx->Driver.TriangleFunc = choose_triangle_function( ctx );
+
+ /* Pixel/span writing functions: */
+ ctx->Driver.WriteColorSpan = write_color_span;
+ ctx->Driver.WriteMonocolorSpan = write_monocolor_span;
+ ctx->Driver.WriteColorPixels = write_color_pixels;
+ ctx->Driver.WriteMonocolorPixels = write_monocolor_pixels;
+ ctx->Driver.WriteIndexSpan = write_index_span;
+ ctx->Driver.WriteMonoindexSpan = write_monoindex_span;
+ ctx->Driver.WriteIndexPixels = write_index_pixels;
+ ctx->Driver.WriteMonoindexPixels = write_monoindex_pixels;
+
+ /* Pixel/span reading functions: */
+ ctx->Driver.ReadIndexSpan = read_index_span;
+ ctx->Driver.ReadColorSpan = read_color_span;
+ ctx->Driver.ReadIndexPixels = read_index_pixels;
+ ctx->Driver.ReadColorPixels = read_color_pixels;
+}
+
+
+/**********************************************************************/
+/***** WMesa API Functions *****/
+/**********************************************************************/
+
+
+
+#define PAL_SIZE 256
+static void GetPalette(HPALETTE Pal,RGBQUAD *aRGB)
+{
+ STARTPROFILE
+ int i;
+ HDC hdc;
+ struct
+ {
+ WORD Version;
+ WORD NumberOfEntries;
+ PALETTEENTRY aEntries[PAL_SIZE];
+ } Palette =
+ {
+ 0x300,
+ PAL_SIZE
+ };
+ hdc=GetDC(NULL);
+ if (Pal!=NULL)
+ GetPaletteEntries(Pal,0,PAL_SIZE,Palette.aEntries);
+ else
+ GetSystemPaletteEntries(hdc,0,PAL_SIZE,Palette.aEntries);
+ if (GetSystemPaletteUse(hdc) == SYSPAL_NOSTATIC)
+ {
+ for(i = 0; i <PAL_SIZE; i++)
+ Palette.aEntries[i].peFlags = PC_RESERVED;
+ Palette.aEntries[255].peRed = 255;
+ Palette.aEntries[255].peGreen = 255;
+ Palette.aEntries[255].peBlue = 255;
+ Palette.aEntries[255].peFlags = 0;
+ Palette.aEntries[0].peRed = 0;
+ Palette.aEntries[0].peGreen = 0;
+ Palette.aEntries[0].peBlue = 0;
+ Palette.aEntries[0].peFlags = 0;
+ }
+ else
+ {
+ int nStaticColors;
+ int nUsableColors;
+ nStaticColors = GetDeviceCaps(hdc, NUMCOLORS)/2;
+ for (i=0; i<nStaticColors; i++)
+ Palette.aEntries[i].peFlags = 0;
+ nUsableColors = PAL_SIZE-nStaticColors;
+ for (; i<nUsableColors; i++)
+ Palette.aEntries[i].peFlags = PC_RESERVED;
+ for (; i<PAL_SIZE-nStaticColors; i++)
+ Palette.aEntries[i].peFlags = PC_RESERVED;
+ for (i=PAL_SIZE-nStaticColors; i<PAL_SIZE; i++)
+ Palette.aEntries[i].peFlags = 0;
+ }
+ ReleaseDC(NULL,hdc);
+ for (i=0; i<PAL_SIZE; i++)
+ {
+ aRGB[i].rgbRed=Palette.aEntries[i].peRed;
+ aRGB[i].rgbGreen=Palette.aEntries[i].peGreen;
+ aRGB[i].rgbBlue=Palette.aEntries[i].peBlue;
+ aRGB[i].rgbReserved=Palette.aEntries[i].peFlags;
+ }
+ ENDPROFILE(GetPalette)
+}
+
+
+WMesaContext WMesaCreateContext( HWND hWnd, HPALETTE* Pal,
+ GLboolean rgb_flag,
+ GLboolean db_flag )
+{
+ RECT CR;
+ WMesaContext c;
+ GLboolean true_color_flag;
+ c = (struct wmesa_context * ) calloc(1,sizeof(struct wmesa_context));
+ if (!c)
+ return NULL;
+
+ c->Window=hWnd;
+ c->hDC = GetDC(hWnd);
+ true_color_flag = GetDeviceCaps(c->hDC, BITSPIXEL) > 8;
+#ifdef DDRAW
+ if(true_color_flag) c->rgb_flag = rgb_flag = GL_TRUE;
+#endif
+
+
+#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;
+// c->pixel = 1;
+ 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");
+ }
+ else
+ {
+ c->rgb_flag = GL_TRUE;
+// c->pixel = 0;
+ }
+ GetClientRect(c->Window,&CR);
+ c->width=CR.right;
+ c->height=CR.bottom;
+ if (db_flag)
+ {
+ c->db_flag = 1;
+ /* Double buffered */
+#ifndef DDRAW
+// if (c->rgb_flag==GL_TRUE && c->dither_flag != GL_TRUE )
+ {
+ wmCreateBackingStore(c, c->width, c->height);
+
+ }
+#endif
+ }
+ else
+ {
+ /* Single Buffered */
+ if (c->rgb_flag)
+ c->db_flag = 0;
+ }
+#ifdef DDRAW
+ if (DDInit(c,hWnd) == GL_FALSE) {
+ free( (void *) c );
+ exit(1);
+ }
+#endif
+
+
+ c->gl_visual = gl_create_visual(rgb_flag,
+ GL_FALSE, /* software alpha */
+ db_flag, /* db_flag */
+ 16, /* depth_bits */
+ 8, /* stencil_bits */
+ 8, /* accum_bits */
+ 8,
+ 255.0, 255.0, 255.0, 255.0,
+ 8,8,8,8 );
+
+ if (!c->gl_visual) {
+ return NULL;
+ }
+
+ /* allocate a new Mesa context */
+ c->gl_ctx = gl_create_context( c->gl_visual, NULL,c);
+
+ if (!c->gl_ctx) {
+ gl_destroy_visual( c->gl_visual );
+ free(c);
+ return NULL;
+ }
+
+ c->gl_buffer = gl_create_framebuffer( c->gl_visual );
+ if (!c->gl_buffer) {
+ gl_destroy_visual( c->gl_visual );
+ gl_destroy_context( c->gl_ctx );
+ free(c);
+ return NULL;
+ }
+// setup_DD_pointers(c->gl_ctx);
+
+ return c;
+}
+
+void WMesaDestroyContext( void )
+{
+ WMesaContext c = Current;
+ ReleaseDC(c->Window,c->hDC);
+ WC = c;
+ if(c->hPalHalfTone != NULL)
+ DeleteObject(c->hPalHalfTone);
+ gl_destroy_visual( c->gl_visual );
+ gl_destroy_framebuffer( c->gl_buffer );
+ gl_destroy_context( c->gl_ctx );
+
+ if (c->db_flag)
+#ifdef DDRAW
+ DDFree(c);
+#else
+ wmDeleteBackingStore(c);
+#endif
+ free( (void *) c );
+//Following code is added to enable parallel render
+// Parallel render only work in double buffer mode
+#if !defined(NO_PARALLEL)
+ if(parallelMachine)
+ PRDestroyRenderBuffer();
+#endif
+// End modification
+}
+
+
+
+void /*APIENTRY*/ WMesaMakeCurrent( WMesaContext c )
+{
+ if(!c){
+ Current = c;
+ return;
+ }
+
+ //
+ // A little optimization
+ // If it already is current,
+ // don't set it again
+ //
+ if(Current == c)
+ return;
+
+ //gl_set_context( c->gl_ctx );
+ gl_make_current(c->gl_ctx, c->gl_buffer);
+ Current = c;
+ setup_DD_pointers(c->gl_ctx);
+ if (Current->gl_ctx->Viewport.Width==0) {
+ /* initialize viewport to window size */
+ gl_Viewport( Current->gl_ctx,
+ 0, 0, Current->width, Current->height );
+ }
+ if ((c->cColorBits <= 8 ) && (c->rgb_flag == GL_TRUE)){
+ WMesaPaletteChange(c->hPalHalfTone);
+ }
+}
+
+
+
+void /*APIENTRY*/ WMesaSwapBuffers( void )
+{
+ HDC DC = Current->hDC;
+ if (Current->db_flag)
+ wmFlush(Current);
+}
+
+
+
+void /*APIENTRY*/ WMesaPaletteChange(HPALETTE Pal)
+{
+ int vRet;
+ LPPALETTEENTRY pPal;
+ if (Current && (Current->rgb_flag==GL_FALSE || Current->dither_flag == GL_TRUE))
+ {
+ pPal = (PALETTEENTRY *)malloc( 256 * sizeof(PALETTEENTRY));
+ Current->hPal=Pal;
+// GetPaletteEntries( Pal, 0, 256, pPal );
+ GetPalette( Pal, pPal );
+#ifdef DDRAW
+ Current->lpDD->lpVtbl->CreatePalette(Current->lpDD,DDPCAPS_8BIT,
+ pPal, &(Current->lpDDPal), NULL);
+ if (Current->lpDDPal)
+ Current->lpDDSPrimary->lpVtbl->SetPalette(Current->lpDDSPrimary,Current->lpDDPal);
+#else
+ vRet = SetDIBColorTable(Current->dib.hDC,0,256,pPal);
+#endif
+ free( pPal );
+ }
+
+}
+
+
+
+
+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
+};
+
+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 /*WINAPI*/ 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);
+
+}
+
+void /*WINAPI*/ wmSetPixel(PWMC pwc, int iScanLine, int iPixel, BYTE r, BYTE g, BYTE b)
+{
+ if(Current->db_flag){
+ LPBYTE lpb = pwc->pbPixels;
+ LPDWORD lpdw;
+ LPWORD lpw;
+ UINT nBypp = pwc->cColorBits / 8;
+ UINT nOffset = iPixel % nBypp;
+
+ // Move the pixel buffer pointer to the scanline that we
+ // want to access
+
+// pwc->dib.fFlushed = FALSE;
+
+ lpb += pwc->ScanWidth * iScanLine;
+ // Now move to the desired pixel
+ lpb += iPixel * nBypp;
+ lpb = PIXELADDR(iPixel, iScanLine);
+ lpdw = (LPDWORD)lpb;
+ lpw = (LPWORD)lpb;
+
+ 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)
+ *lpw = BGR16(r,g,b);
+ else if (nBypp == 3){
+ *lpdw = BGR24(r,g,b);
+ }
+ else if (nBypp == 4)
+ *lpdw = BGR32(r,g,b);
+ }
+ else{
+ HDC DC = DD_GETDC;
+ SetPixel(DC, iPixel, iScanLine, RGB(r,g,b));
+ DD_RELEASEDC;
+ }
+}
+
+void /*WINAPI*/ wmCreateDIBSection(
+ HDC hDC,
+ PWMC pwc, // handle of device context
+ CONST BITMAPINFO *pbmi, // address of structure containing 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;
+ }
+
+// pwc->pbPixels = pwc->addrOffScreen = ((LPBYTE)pwc->dib.base) + sizeof(BITMAPINFO);
+
+// pwc->dib.hDC = CreateCompatibleDC(hDC);
+
+ CopyMemory(pwc->dib.base, pbmi, sizeof(BITMAPINFO));
+
+ hic = CreateIC("display", NULL, NULL, NULL);
+ pwc->dib.hDC = CreateCompatibleDC(hic);
+
+
+/* pwc->hbmDIB = CreateDIBitmap(hic,
+ &(pwc->bmi.bmiHeader),
+ CBM_INIT,
+ pwc->pbPixels,
+ &(pwc->bmi),
+ DIB_RGB_COLORS);
+*/
+ pwc->hbmDIB = CreateDIBSection(hic,
+ &(pwc->bmi),
+ (iUsage ? DIB_PAL_COLORS : DIB_RGB_COLORS),
+ &(pwc->pbPixels),
+ pwc->dib.hFileMap,
+ 0);
+ /*
+ pwc->hbmDIB = CreateDIBSection(hic,
+ &(pwc->bmi),
+ 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;
+
+}
+
+//
+// Blit memory DC to screen DC
+//
+BOOL /*WINAPI*/ wmFlush(PWMC pwc)
+{
+ BOOL bRet = 0;
+ DWORD dwErr = 0;
+ HRESULT ddrval;
+
+ // Now search through the torus frames and mark used colors
+ if(pwc->db_flag){
+#ifdef DDRAW
+ if (pwc->lpDDSOffScreen == NULL)
+ if(DDCreateOffScreen(pwc) == GL_FALSE)
+ return;
+
+ pwc->lpDDSOffScreen->lpVtbl->Unlock(pwc->lpDDSOffScreen, NULL);
+
+ while( 1 )
+ {
+ ddrval = pwc->lpDDSPrimary->lpVtbl->Blt( pwc->lpDDSPrimary,
+ &(pwc->rectSurface), pwc->lpDDSOffScreen, &(pwc->rectOffScreen), 0, NULL );
+
+ if( ddrval == DD_OK )
+ {
+ break;
+ }
+ if( ddrval == DDERR_SURFACELOST )
+ {
+ if(!DDRestoreAll(pwc))
+ {
+ break;
+ }
+ }
+ if( ddrval != DDERR_WASSTILLDRAWING )
+ {
+ break;
+ }
+ }
+
+ while (pwc->lpDDSOffScreen->lpVtbl->Lock(pwc->lpDDSOffScreen,
+ NULL, &(pwc->ddsd), 0, NULL) == DDERR_WASSTILLDRAWING)
+ ;
+
+ if(ddrval != DD_OK)
+ dwErr = GetLastError();
+#else
+ bRet = BitBlt(pwc->hDC, 0, 0, pwc->width, pwc->height,
+ pwc->dib.hDC, 0, 0, SRCCOPY);
+#endif
+ }
+
+ return(TRUE);
+
+}
+
+
+// The following code is added by Li Wei to enable stereo display
+
+#if !defined(NO_STEREO)
+
+void WMesaShowStereo(GLuint list)
+{
+
+ GLbitfield mask = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;
+ GLfloat cm[16];
+ GLint matrix_mode;
+ // Must use double Buffer
+ if( ! Current-> db_flag )
+ return;
+
+
+ glGetIntegerv(GL_MATRIX_MODE,&matrix_mode);
+
+// glPushMatrix(); //****
+ WMesaViewport(Current->gl_ctx,0,Current->height/2,Current->width,Current->height/2);
+// Current->gl_ctx->NewState = 0;
+
+ // glViewport(0,0,Current->width,Current->height/2);
+ if(matrix_mode!=GL_MODELVIEW)
+ glMatrixMode(GL_MODELVIEW);
+
+ glGetFloatv(GL_MODELVIEW_MATRIX,cm);
+ glLoadIdentity();
+ gluLookAt(viewDistance/2,0.0,0.0 ,
+ viewDistance/2,0.0,-1.0,
+ 0.0,1.0,0.0 );
+// glTranslatef(viewDistance/2.0,0.,0.);
+ glMultMatrixf( cm );
+
+ Current->ScreenMem = Current->pbPixels = Current->addrOffScreen;
+ //glPushMatrix();
+ glCallList( list );
+ //glPopMatrix();
+
+ glGetFloatv(GL_MODELVIEW_MATRIX,cm);
+ glLoadIdentity();
+ gluLookAt(-viewDistance/2,0.0,0.0 ,
+ -viewDistance/2,0.0,-1.0,
+ 0.0,1.0,0.0 );
+// glTranslatef(-viewDistance/2.0,0.,0.);
+ glMultMatrixf(cm);
+
+ Current->ScreenMem = Current->pbPixels = Current->addrOffScreen + Current->pitch;
+ glCallList(list);
+ if(matrix_mode!=GL_MODELVIEW)
+ glMatrixMode(matrix_mode);
+
+// glPopMatrix();
+ glFlush();
+
+ WMesaViewport(Current->gl_ctx,0,0,Current->width,Current->height);
+// Current->gl_ctx->NewState = 0;
+ WMesaSwapBuffers();
+
+}
+
+void toggleStereoMode()
+{
+ if(!Current->db_flag)
+ return;
+ if(!stereo_flag){
+ stereo_flag = 1;
+ if(stereoBuffer==GL_FALSE)
+#if !defined(NO_PARALLEL)
+ if(!parallelFlag)
+#endif
+ {
+ Current->ScanWidth = Current->pitch*2;
+ }
+ }
+ else {
+ stereo_flag = 0;
+#if !defined(NO_PARALLEL)
+ if(!parallelFlag)
+#endif
+ Current->ScanWidth = Current->pitch;
+ Current->pbPixels = Current->addrOffScreen;
+ }
+}
+
+/* if in stereo mode, the following function is called */
+void glShowStereo(GLuint list)
+{
+ WMesaShowStereo(list);
+}
+
+#endif // End if NO_STEREO not defined
+
+#if !defined(NO_PARALLEL)
+
+void toggleParallelMode(void)
+{
+ if(!parallelFlag){
+ parallelFlag = GL_TRUE;
+ if(parallelMachine==GL_FALSE){
+ PRCreateRenderBuffer( Current->rgb_flag? GL_RGBA :GL_COLOR_INDEX,
+ Current->cColorBits/8,
+ Current->width ,Current->height,
+ Current->ScanWidth,
+ Current->rgb_flag? Current->pbPixels: Current->ScreenMem);
+ parallelMachine = GL_TRUE;
+ }
+ }
+ else {
+ parallelFlag = GL_FALSE;
+ if(parallelMachine==GL_TRUE){
+ PRDestroyRenderBuffer();
+ parallelMachine=GL_FALSE;
+ ReadyForNextFrame = GL_TRUE;
+ }
+
+/***********************************************
+// Seems something wrong!!!!
+************************************************/
+
+ WMesaMakeCurrent(Current);
+#if !defined(NO_STEREO)
+ stereo_flag = GL_FALSE ;
+#endif
+ }
+}
+
+void PRShowRenderResult(void)
+{
+ int flag = 0;
+if(!glImageRendered())
+ return;
+
+ if (parallelFlag)
+ {
+ WMesaSwapBuffers();
+ }
+
+}
+#endif //End if NO_PARALLEL not defined
+
+//end modification
+
+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];
+}
+
+#ifdef DDRAW
+/*
+ * restoreAll
+ *
+ * restore all lost objects
+ */
+HRESULT DDRestoreAll( WMesaContext wc )
+{
+ HRESULT ddrval;
+
+ ddrval = wc->lpDDSPrimary->lpVtbl->Restore(wc->lpDDSPrimary);
+ if( ddrval == DD_OK )
+ {
+ ddrval = wc->lpDDSOffScreen->lpVtbl->Restore(wc->lpDDSOffScreen);
+ }
+ return ddrval;
+
+} /* restoreAll */
+
+
+/*
+ * This function is called if the initialization function fails
+ */
+BOOL initFail( HWND hwnd, WMesaContext wc )
+{
+ DDFree(wc);
+ MessageBox( hwnd, "DirectDraw Init FAILED", "", MB_OK );
+ return FALSE;
+
+} /* initFail */
+
+
+static void DDDeleteOffScreen(WMesaContext wc)
+{
+ if( wc->lpDDSOffScreen != NULL )
+ {
+ wc->lpDDSOffScreen->lpVtbl->Unlock(wc->lpDDSOffScreen,NULL);
+ wc->lpDDSOffScreen->lpVtbl->Release(wc->lpDDSOffScreen);
+ wc->lpDDSOffScreen = NULL;
+ }
+
+}
+
+static void DDFreePrimarySurface(WMesaContext wc)
+{
+ if( wc->lpDDSPrimary != NULL )
+ {
+ if(wc->db_flag == GL_FALSE)
+ wc->lpDDSPrimary->lpVtbl->ReleaseDC(wc->lpDDSPrimary, wc->hDC);
+ wc->lpDDSPrimary->lpVtbl->Release(wc->lpDDSPrimary);
+ wc->lpDDSPrimary = NULL;
+ }
+}
+
+static BOOL DDCreatePrimarySurface(WMesaContext wc)
+{
+ HRESULT ddrval;
+ DDSCAPS ddscaps;
+ wc->ddsd.dwSize = sizeof( wc->ddsd );
+ wc->ddsd.dwFlags = DDSD_CAPS;
+ wc->ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
+
+ ddrval = wc->lpDD->lpVtbl->CreateSurface( wc->lpDD,&(wc->ddsd), &(wc->lpDDSPrimary), NULL );
+ if( ddrval != DD_OK )
+ {
+ return initFail(wc->hwnd , wc);
+ }
+ if(wc->db_flag == GL_FALSE)
+ wc->lpDDSPrimary->lpVtbl->GetDC(wc->lpDDSPrimary, wc->hDC);
+ return TRUE;
+}
+
+static BOOL DDCreateOffScreen(WMesaContext wc)
+{
+ POINT pt;
+ HRESULT ddrval;
+ if(wc->lpDD == NULL)
+ return FALSE;
+ GetClientRect( wc->hwnd, &(wc->rectOffScreen) );
+ wc->ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
+ wc->ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
+ wc->ddsd.dwHeight = wc->rectOffScreen.bottom - wc->rectOffScreen.top;
+ wc->ddsd.dwWidth = wc->rectOffScreen.right - wc->rectOffScreen.left;
+
+ ddrval = wc->lpDD->lpVtbl->CreateSurface( wc->lpDD, &(wc->ddsd), &(wc->lpDDSOffScreen), NULL );
+ if( ddrval != DD_OK )
+ {
+ return FALSE;
+ }
+
+ while (wc->lpDDSOffScreen->lpVtbl->Lock(wc->lpDDSOffScreen,NULL, &(wc->ddsd), 0, NULL) == DDERR_WASSTILLDRAWING)
+ ;
+// while ((ddrval = wc->lpDDSOffScreen->lpVtbl->Lock(wc->lpDDSOffScreen,NULL, &(wc->ddsd), DDLOCK_SURFACEMEMORYPTR , NULL)) != DD_OK)
+ ;
+ if(wc->ddsd.lpSurface==NULL)
+ return initFail(wc->hwnd, wc);
+
+ wc->ScreenMem = wc->pbPixels = wc->addrOffScreen = (PBYTE)(wc->ddsd.lpSurface);
+ wc->ScanWidth = wc->pitch = wc->ddsd.lPitch;
+ if (stereo_flag)
+ wc->ScanWidth = wc->ddsd.lPitch*2;
+
+ GetClientRect( wc->hwnd, &(wc->rectSurface) );
+ pt.x = pt.y = 0;
+ ClientToScreen( wc->hwnd, &pt );
+ OffsetRect(&(wc->rectSurface), pt.x, pt.y);
+ wmSetPixelFormat(wc, wc->hDC);
+ return TRUE;
+}
+
+/*
+ * doInit - do work required for every instance of the application:
+ * create the window, initialize data
+ */
+static BOOL DDInit( WMesaContext wc, HWND hwnd)
+{
+ HRESULT ddrval;
+ DWORD dwFrequency;
+
+ LPDIRECTDRAW lpDD; // DirectDraw object
+ LPDIRECTDRAW2 lpDD2;
+
+
+ wc->fullScreen = displayOptions.fullScreen;
+ wc->gMode = displayOptions.mode;
+ wc->hwnd = hwnd;
+ stereo_flag = displayOptions.stereo;
+ if(wc->db_flag!= GL_TRUE)
+ stereo_flag = GL_FALSE;
+ /*
+ * create the main DirectDraw object
+ */
+ ddrval = DirectDrawCreate( NULL, &(wc->lpDD), NULL );
+ if( ddrval != DD_OK )
+ {
+ return initFail(hwnd,wc);
+ }
+
+ // Get exclusive mode if requested
+ if(wc->fullScreen)
+ {
+ ddrval = wc->lpDD->lpVtbl->SetCooperativeLevel( wc->lpDD, hwnd, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN );
+ }
+ else
+ {
+ ddrval = wc->lpDD->lpVtbl->SetCooperativeLevel( wc->lpDD, hwnd, DDSCL_NORMAL );
+ }
+ if( ddrval != DD_OK )
+ {
+ return initFail(hwnd , wc);
+ }
+
+
+/* ddrval = wc->lpDD->lpVtbl->QueryInterface(wc->lpDD, IID_IDirectDraw2,
+ (LPVOID *)((wc->lpDD2)));
+
+*/
+ if(ddrval != DD_OK)
+ return initFail(hwnd , wc);
+
+
+ //ddrval = wc->lpDD->lpVtbl->GetDisplayMode( wc->lpDD, &(wc->ddsd));
+ // wc->lpDD2->lpVtbl->GetMonitorFrequency(wc->lpDD, &dwFrequency);
+ switch( wc->gMode )
+ {
+ case 1: ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 640, 480, displayOptions.bpp); break;
+ case 2: ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 800, 600, displayOptions.bpp); break;
+ case 3: ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1024, 768, displayOptions.bpp); break;
+ case 4: ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1152, 864, displayOptions.bpp); break;
+ case 5: ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1280, 1024, displayOptions.bpp); break;
+ }
+
+ if( ddrval != DD_OK )
+ {
+ printf("Can't modify display mode, current mode used\n");
+// return initFail(hwnd , wc);
+ }
+//ddrval = wc->lpDD->lpVtbl->GetDisplayMode( wc->lpDD, &(wc->ddsd));
+switch(ddrval){
+case DDERR_INVALIDOBJECT:
+ break;
+case DDERR_INVALIDPARAMS:
+ break;
+case DDERR_UNSUPPORTEDMODE:
+ ;
+}
+
+ if(DDCreatePrimarySurface(wc) == GL_FALSE)
+ return initFail(hwnd, wc);
+
+ if(wc->db_flag)
+ return DDCreateOffScreen(wc);
+} /* DDInit */
+
+static void DDFree( WMesaContext wc)
+{
+ if( wc->lpDD != NULL )
+ {
+ DDFreePrimarySurface(wc);
+ DDDeleteOffScreen(wc);
+ wc->lpDD->lpVtbl->Release(wc->lpDD);
+ wc->lpDD = NULL;
+ }
+ // Clean up the screen on exit
+ RedrawWindow( NULL, NULL, NULL, RDW_INVALIDATE | RDW_ERASE |
+ RDW_ALLCHILDREN );
+
+}
+#endif
+
+void WMesaMove(void)
+{
+ WMesaContext wc = Current;
+ POINT pt;
+ if (Current != NULL){
+ GetClientRect( wc->hwnd, &(wc->rectSurface) );
+ pt.x = pt.y = 0;
+ ClientToScreen( wc->hwnd, &pt );
+ OffsetRect(&(wc->rectSurface), pt.x, pt.y);
+ }
+}
+
+/*
+ * Like PACK_8A8B8G8R() but don't use alpha. This is usually an acceptable
+ * shortcut.
+ */
+#define PACK_8B8G8R( R, G, B ) ( ((B) << 16) | ((G) << 8) | (R) )
+
+
+/**********************************************************************/
+/*** Triangle rendering ***/
+/**********************************************************************/
+
+
+
+/*
+ * XImage, smooth, depth-buffered, PF_8A8B8G8R triangle.
+ */
+static void smooth_8A8B8G8R_z_triangle( GLcontext *ctx,
+ GLuint v0, GLuint v1, GLuint v2,
+ GLuint pv )
+{
+WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
+#define PIXEL_TYPE GLuint
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, len = RIGHT-LEFT; \
+ for (i=0;i<len;i++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ pRow[i] = PACK_8B8G8R( FixedToInt(ffr), FixedToInt(ffg), \
+ FixedToInt(ffb) ); \
+ zRow[i] = z; \
+ } \
+ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, smooth, depth-buffered, PF_8R8G8B triangle.
+ */
+static void smooth_8R8G8B_z_triangle( GLcontext *ctx,
+ GLuint v0, GLuint v1, GLuint v2,
+ GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
+#define PIXEL_TYPE GLuint
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, len = RIGHT-LEFT; \
+ for (i=0;i<len;i++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ pRow[i] = PACK_8R8G8B( FixedToInt(ffr), FixedToInt(ffg), \
+ FixedToInt(ffb) ); \
+ zRow[i] = z; \
+ } \
+ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+
+/*
+ * XImage, smooth, depth-buffered, PF_5R6G5B triangle.
+ */
+static void smooth_5R6G5B_z_triangle( GLcontext *ctx,
+ GLuint v0, GLuint v1, GLuint v2,
+ GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)
+#define PIXEL_TYPE GLushort
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, len = RIGHT-LEFT; \
+ for (i=0;i<len;i++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ pRow[i] = PACK_5R6G5B( FixedToInt(ffr), FixedToInt(ffg), \
+ FixedToInt(ffb) ); \
+ zRow[i] = z; \
+ } \
+ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+/*
+ * XImage, flat, depth-buffered, PF_8A8B8G8R triangle.
+ */
+static void flat_8A8B8G8R_z_triangle( GLcontext *ctx, GLuint v0,
+ GLuint v1, GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
+#define PIXEL_TYPE GLuint
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define SETUP_CODE \
+ unsigned long p = PACK_8B8G8R( VB->Color[pv][0], \
+ VB->Color[pv][1], VB->Color[pv][2] );
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, len = RIGHT-LEFT; \
+ for (i=0;i<len;i++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ pRow[i] = p; \
+ zRow[i] = z; \
+ } \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, flat, depth-buffered, PF_8R8G8B triangle.
+ */
+static void flat_8R8G8B_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
+#define PIXEL_TYPE GLuint
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define SETUP_CODE \
+ unsigned long p = PACK_8R8G8B( VB->Color[pv][0], \
+ VB->Color[pv][1], VB->Color[pv][2] );
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, len = RIGHT-LEFT; \
+ for (i=0;i<len;i++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ pRow[i] = p; \
+ zRow[i] = z; \
+ } \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, flat, depth-buffered, PF_5R6G5B triangle.
+ */
+static void flat_5R6G5B_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)
+#define PIXEL_TYPE GLushort
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define SETUP_CODE \
+ unsigned long p = PACK_5R6G5B( VB->Color[pv][0], \
+ VB->Color[pv][1], VB->Color[pv][2] );
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, len = RIGHT-LEFT; \
+ for (i=0;i<len;i++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ pRow[i] = p; \
+ zRow[i] = z; \
+ } \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, smooth, NON-depth-buffered, PF_8A8B8G8R triangle.
+ */
+static void smooth_8A8B8G8R_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_RGB 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
+#define PIXEL_TYPE GLuint
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx; \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ *pixel = PACK_8B8G8R( FixedToInt(ffr), FixedToInt(ffg), \
+ FixedToInt(ffb) ); \
+ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, smooth, NON-depth-buffered, PF_8R8G8B triangle.
+ */
+static void smooth_8R8G8B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_RGB 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
+#define PIXEL_TYPE GLuint
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx; \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ *pixel = PACK_8R8G8B( FixedToInt(ffr), FixedToInt(ffg), \
+ FixedToInt(ffb) ); \
+ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, smooth, NON-depth-buffered, PF_5R6G5B triangle.
+ */
+static void smooth_5R6G5B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_RGB 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)
+#define PIXEL_TYPE GLushort
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx; \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ *pixel = PACK_5R6G5B( FixedToInt(ffr), FixedToInt(ffg), \
+ FixedToInt(ffb) ); \
+ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+
+/*
+ * XImage, flat, NON-depth-buffered, PF_8A8B8G8R triangle.
+ */
+static void flat_8A8B8G8R_triangle( GLcontext *ctx, GLuint v0,
+ GLuint v1, GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
+#define PIXEL_TYPE GLuint
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define SETUP_CODE \
+ unsigned long p = PACK_8B8G8R( VB->Color[pv][0], \
+ VB->Color[pv][1], VB->Color[pv][2] );
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx; \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ *pixel = p; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, flat, NON-depth-buffered, PF_8R8G8B triangle.
+ */
+static void flat_8R8G8B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
+#define PIXEL_TYPE GLuint
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define SETUP_CODE \
+ unsigned long p = PACK_8R8G8B( VB->Color[pv][0], \
+ VB->Color[pv][1], VB->Color[pv][2] );
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx; \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ *pixel = p; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, flat, NON-depth-buffered, PF_5R6G5B triangle.
+ */
+static void flat_5R6G5B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)
+#define PIXEL_TYPE GLushort
+//#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define SETUP_CODE \
+ unsigned long p = PACK_5R6G5B( VB->Color[pv][0], \
+ VB->Color[pv][1], VB->Color[pv][2] );
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx; \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ *pixel = p; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, smooth, depth-buffered, 8-bit PF_LOOKUP triangle.
+ */
+
+static void smooth_ci_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define INTERP_INDEX 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, len = RIGHT-LEFT; \
+ for (i=0;i<len;i++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ pRow[i] = FixedToInt(ffi); \
+ zRow[i] = z; \
+ } \
+ ffi += fdidx; \
+ ffz += fdzdx; \
+ } \
+}
+
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, flat, depth-buffered, 8-bit PF_LOOKUP triangle.
+ */
+
+static void flat_ci_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define SETUP_CODE \
+ GLuint index = VB->Index[pv]; \
+ if (!VB->MonoColor) { \
+ /* set the color index */ \
+ (*ctx->Driver.Index)( ctx, index ); \
+ }
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, len = RIGHT-LEFT; \
+ for (i=0;i<len;i++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ pRow[i] = index; \
+ zRow[i] = z; \
+ } \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+
+/*
+ * XImage, smooth, NON-depth-buffered, 8-bit PF_LOOKUP triangle.
+ */
+
+static void smooth_ci_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define INTERP_INDEX 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx; \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ *pixel = FixedToInt(ffi); \
+ ffi += fdidx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+/*
+ * XImage, flat, NON-depth-buffered, 8-bit PF_LOOKUP triangle.
+ */
+static void flat_ci_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+#define INTERP_Z 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define SETUP_CODE \
+ GLuint index = VB->Index[pv]; \
+ if (!VB->MonoColor) { \
+ /* set the color index */ \
+ (*ctx->Driver.Index)( ctx, index ); \
+ }
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx; \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ *pixel = index; \
+ } \
+}
+#include "tritemp.h"
+}
+
+/*
+ * XImage, smooth, depth-buffered, 8-bit, PF_DITHER8 triangle.
+ */
+static void smooth_DITHER8_z_triangle( GLcontext *ctx,
+ GLuint v0, GLuint v1, GLuint v2,
+ GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+ DITHER_RGB_TO_8BIT_SETUP
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, xx = LEFT, yy = FLIP(Y), len = RIGHT-LEFT; \
+ for (i=0;i<len;i++,xx++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ DITHER_RGB_TO_8BIT( FixedToInt(ffr), FixedToInt(ffg), \
+ FixedToInt(ffb), xx, yy); \
+ pRow[i] = pixelDithered; \
+ zRow[i] = z; \
+ } \
+ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+/*
+ * XImage, flat, depth-buffered, 8-bit PF_DITHER triangle.
+ */
+static void flat_DITHER8_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+ DITHER_RGB_TO_8BIT_SETUP
+#define INTERP_Z 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint i, xx = LEFT, yy = FLIP(Y), len = RIGHT-LEFT; \
+ for (i=0;i<len;i++,xx++) { \
+ GLdepth z = FixedToDepth(ffz); \
+ if (z < zRow[i]) { \
+ DITHER_RGB_TO_8BIT( VB->Color[pv][0], \
+ VB->Color[pv][1], VB->Color[pv][2], xx, yy); \
+ pRow[i] = pixelDithered; \
+ zRow[i] = z; \
+ } \
+ ffz += fdzdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+/*
+ * XImage, smooth, NON-depth-buffered, 8-bit PF_DITHER triangle.
+ */
+static void smooth_DITHER8_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+ DITHER_RGB_TO_8BIT_SETUP
+#define INTERP_RGB 1
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx, yy = FLIP(Y); \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ DITHER_RGB_TO_8BIT( VB->Color[pv][0], VB->Color[pv][1], VB->Color[pv][2], xx, yy);\
+ *pixel = pixelDithered; \
+ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; \
+ } \
+}
+#include "tritemp.h"
+}
+
+/*
+ * XImage, flat, NON-depth-buffered, 8-bit PF_DITHER triangle.
+ */
+
+static void flat_DITHER8_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
+ GLuint v2, GLuint pv )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+ DITHER_RGB_TO_8BIT_SETUP
+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
+#define PIXEL_TYPE GLubyte
+#define BYTES_PER_ROW (wmesa->ScanWidth)
+
+#define INNER_LOOP( LEFT, RIGHT, Y ) \
+{ \
+ GLint xx, yy = FLIP(Y); \
+ PIXEL_TYPE *pixel = pRow; \
+ for (xx=LEFT;xx<RIGHT;xx++,pixel++) { \
+ DITHER_RGB_TO_8BIT( VB->Color[pv][0], \
+ VB->Color[pv][1], VB->Color[pv][2], xx, yy); \
+ *pixel = pixelDithered; \
+ } \
+}
+#include "tritemp.h"
+}
+
+
+
+
+static triangle_func choose_triangle_function( GLcontext *ctx )
+{
+ WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
+ int depth = wmesa->cColorBits;
+
+ if (ctx->Polygon.SmoothFlag) return NULL;
+ if (ctx->Texture.Enabled) return NULL;
+ if (!wmesa->db_flag) return NULL;
+ /*if (wmesa->xm_buffer->buffer==XIMAGE)*/ {
+ if ( ctx->Light.ShadeModel==GL_SMOOTH
+ && ctx->RasterMask==DEPTH_BIT
+ && ctx->Depth.Func==GL_LESS
+ && ctx->Depth.Mask==GL_TRUE
+ && ctx->Polygon.StippleFlag==GL_FALSE) {
+ switch (wmesa->pixelformat) {
+ case PF_8A8B8G8R:
+ return smooth_8A8B8G8R_z_triangle;
+ case PF_8R8G8B:
+ return smooth_8R8G8B_z_triangle;
+ case PF_5R6G5B:
+ return smooth_5R6G5B_z_triangle;
+ case PF_DITHER8:
+ return smooth_DITHER8_z_triangle;
+ case PF_INDEX8:
+ return smooth_ci_z_triangle;
+ default:
+ return NULL;
+ }
+ }
+ if ( ctx->Light.ShadeModel==GL_FLAT
+ && ctx->RasterMask==DEPTH_BIT
+ && ctx->Depth.Func==GL_LESS
+ && ctx->Depth.Mask==GL_TRUE
+ && ctx->Polygon.StippleFlag==GL_FALSE) {
+ switch (wmesa->pixelformat) {
+ case PF_8A8B8G8R:
+ return flat_8A8B8G8R_z_triangle;
+ case PF_8R8G8B:
+ return flat_8R8G8B_z_triangle;
+ case PF_5R6G5B:
+ return flat_5R6G5B_z_triangle;
+ case PF_DITHER8:
+ return flat_DITHER8_z_triangle;
+ case PF_INDEX8:
+ return flat_ci_z_triangle;
+ default:
+ return NULL;
+ }
+ }
+ if ( ctx->RasterMask==0 /* no depth test */
+ && ctx->Light.ShadeModel==GL_SMOOTH
+ && ctx->Polygon.StippleFlag==GL_FALSE) {
+ switch (wmesa->pixelformat) {
+ case PF_8A8B8G8R:
+ return smooth_8A8B8G8R_triangle;
+ case PF_8R8G8B:
+ return smooth_8R8G8B_triangle;
+ case PF_5R6G5B:
+ return smooth_5R6G5B_triangle;
+ case PF_DITHER8:
+ return smooth_DITHER8_triangle;
+ case PF_INDEX8:
+ return smooth_ci_triangle;
+ default:
+ return NULL;
+ }
+ }
+
+ if ( ctx->RasterMask==0 /* no depth test */
+ && ctx->Light.ShadeModel==GL_FLAT
+ && ctx->Polygon.StippleFlag==GL_FALSE) {
+ switch (wmesa->pixelformat) {
+ case PF_8A8B8G8R:
+ return flat_8A8B8G8R_triangle;
+ case PF_8R8G8B:
+ return flat_8R8G8B_triangle;
+ case PF_5R6G5B:
+ return flat_5R6G5B_triangle;
+ case PF_DITHER8:
+ return flat_DITHER8_triangle;
+ case PF_INDEX8:
+ return flat_ci_triangle;
+ default:
+ return NULL;
+ }
+ }
+
+ return NULL;
+ }
+}
+
+/*
+ * Define a new viewport and reallocate auxillary buffers if the size of
+ * the window (color buffer) has changed.
+ */
+void WMesaViewport( GLcontext *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height )
+{
+ /* Save viewport */
+ ctx->Viewport.X = x;
+ ctx->Viewport.Width = width;
+ ctx->Viewport.Y = y;
+ ctx->Viewport.Height = height;
+
+ /* compute scale and bias values */
+ ctx->Viewport.Sx = (GLfloat) width / 2.0F;
+ ctx->Viewport.Tx = ctx->Viewport.Sx + x;
+ ctx->Viewport.Sy = (GLfloat) height / 2.0F;
+ ctx->Viewport.Ty = ctx->Viewport.Sy + y;
+}
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