win32ss/user/winsrv/consrv/frontends/gui/graphics.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS Console Server DLL
   4  * FILE:            win32ss/user/winsrv/consrv/frontends/gui/graphics.c
   5  * PURPOSE:         GUI Terminal Front-End - Support for graphics-mode screen-buffers
   6  * PROGRAMMERS:     Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   7  */
   8
   9 /* INCLUDES *******************************************************************/
  10
  11 #include <consrv.h>
  12
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 #include "guiterm.h"
  17
  18 /* FUNCTIONS ******************************************************************/
  19
  20 VOID
  21 GuiCopyFromGraphicsBuffer(PGRAPHICS_SCREEN_BUFFER Buffer,
  22                           PGUI_CONSOLE_DATA GuiData)
  23 {
  24     /*
  25      * This function supposes that the system clipboard was opened.
  26      */
  27
  28     PCONSOLE Console = Buffer->Header.Console;
  29
  30     HDC hMemDC;
  31     HBITMAP  hBitmapTarget, hBitmapOld;
  32     HPALETTE hPalette, hPaletteOld;
  33     ULONG selWidth, selHeight;
  34
  35     if (Buffer->BitMap == NULL) return;
  36
  37     selWidth  = Console->Selection.srSelection.Right - Console->Selection.srSelection.Left + 1;
  38     selHeight = Console->Selection.srSelection.Bottom - Console->Selection.srSelection.Top + 1;
  39     DPRINT1("Selection is (%d|%d) to (%d|%d)\n",
  40            Console->Selection.srSelection.Left,
  41            Console->Selection.srSelection.Top,
  42            Console->Selection.srSelection.Right,
  43            Console->Selection.srSelection.Bottom);
  44
  45     hMemDC = CreateCompatibleDC(GuiData->hMemDC);
  46     if (hMemDC == NULL) return;
  47
  48     /* Allocate a bitmap to be given to the clipboard, so it will not be freed here */
  49     hBitmapTarget = CreateCompatibleBitmap(GuiData->hMemDC, selWidth, selHeight);
  50     if (hBitmapTarget == NULL)
  51     {
  52         DeleteDC(hMemDC);
  53         return;
  54     }
  55
  56     /* Select the new bitmap */
  57     hBitmapOld = SelectObject(hMemDC, hBitmapTarget);
  58
  59     /* Change the palette in hMemDC if the current palette does exist */
  60     if (Buffer->PaletteHandle == NULL)
  61         hPalette = GuiData->hSysPalette;
  62     else
  63         hPalette = Buffer->PaletteHandle;
  64
  65     if (hPalette) hPaletteOld = SelectPalette(hMemDC, hPalette, FALSE);
  66
  67     /* Grab the mutex */
  68     NtWaitForSingleObject(Buffer->Mutex, FALSE, NULL);
  69
  70     // The equivalent of a SetDIBitsToDevice call...
  71     // It seems to be broken: it does not copy the tail of the bitmap.
  72     // http://wiki.allegro.cc/index.php?title=StretchDIBits
  73 #if 0
  74     StretchDIBits(hMemDC,
  75                   0, 0,
  76                   selWidth, selHeight,
  77                   Console->Selection.srSelection.Left,
  78                   Console->Selection.srSelection.Top,
  79                   selWidth, selHeight,
  80                   Buffer->BitMap,
  81                   Buffer->BitMapInfo,
  82                   Buffer->BitMapUsage,
  83                   SRCCOPY);
  84 #else
  85     SetDIBitsToDevice(hMemDC,
  86                       /* Coordinates / size of the repainted rectangle, in the framebuffer's frame */
  87                       0, 0,
  88                       selWidth, selHeight,
  89                       /* Coordinates / size of the corresponding image portion, in the graphics screen-buffer's frame */
  90                       Console->Selection.srSelection.Left,
  91                       Console->Selection.srSelection.Top,
  92                       0,
  93                       Buffer->ScreenBufferSize.Y, // == Buffer->BitMapInfo->bmiHeader.biHeight
  94                       Buffer->BitMap,
  95                       Buffer->BitMapInfo,
  96                       Buffer->BitMapUsage);
  97 #endif
  98
  99     /* Release the mutex */
 100     NtReleaseMutant(Buffer->Mutex, NULL);
 101
 102     /* Restore the palette and the old bitmap */
 103     if (hPalette) SelectPalette(hMemDC, hPaletteOld, FALSE);
 104     SelectObject(hMemDC, hBitmapOld);
 105
 106     EmptyClipboard();
 107     SetClipboardData(CF_BITMAP, hBitmapTarget);
 108
 109     DeleteDC(hMemDC);
 110 }
 111
 112 VOID
 113 GuiPasteToGraphicsBuffer(PGRAPHICS_SCREEN_BUFFER Buffer,
 114                          PGUI_CONSOLE_DATA GuiData)
 115 {
 116     /*
 117      * This function supposes that the system clipboard was opened.
 118      */
 119
 120     // PCONSOLE Console = Buffer->Header.Console;
 121
 122     UNIMPLEMENTED;
 123 }
 124
 125 VOID
 126 GuiPaintGraphicsBuffer(PGRAPHICS_SCREEN_BUFFER Buffer,
 127                        PGUI_CONSOLE_DATA GuiData,
 128                        PRECT rcView,
 129                        PRECT rcFramebuffer)
 130 {
 131     if (Buffer->BitMap == NULL) return;
 132
 133     rcFramebuffer->left   = Buffer->ViewOrigin.X * 1 + rcView->left;
 134     rcFramebuffer->top    = Buffer->ViewOrigin.Y * 1 + rcView->top;
 135     rcFramebuffer->right  = Buffer->ViewOrigin.X * 1 + rcView->right;
 136     rcFramebuffer->bottom = Buffer->ViewOrigin.Y * 1 + rcView->bottom;
 137
 138     /* Grab the mutex */
 139     NtWaitForSingleObject(Buffer->Mutex, FALSE, NULL);
 140
 141     /*
 142      * The seventh parameter (YSrc) of SetDIBitsToDevice always designates
 143      * the Y-coordinate of the "lower-left corner" of the image, be the DIB
 144      * in bottom-up or top-down mode.
 145      */
 146     SetDIBitsToDevice(GuiData->hMemDC,
 147                       /* Coordinates / size of the repainted rectangle, in the framebuffer's frame */
 148                       rcFramebuffer->left,
 149                       rcFramebuffer->top,
 150                       rcFramebuffer->right  - rcFramebuffer->left,
 151                       rcFramebuffer->bottom - rcFramebuffer->top,
 152                       /* Coordinates / size of the corresponding image portion, in the graphics screen-buffer's frame */
 153                       rcFramebuffer->left,
 154                       rcFramebuffer->top,
 155                       0,
 156                       Buffer->ScreenBufferSize.Y, // == Buffer->BitMapInfo->bmiHeader.biHeight
 157                       Buffer->BitMap,
 158                       Buffer->BitMapInfo,
 159                       Buffer->BitMapUsage);
 160
 161     /* Release the mutex */
 162     NtReleaseMutant(Buffer->Mutex, NULL);
 163 }
 164
 165 /* EOF */