diff options
| author | Jaroslav Hensl <emulator@emulace.cz> | 2023-04-10 14:53:37 +0200 |
|---|---|---|
| committer | Jaroslav Hensl <emulator@emulace.cz> | 2023-04-10 14:53:37 +0200 |
| commit | 503e91046f60a86823629d43e64e2d0fcc006549 (patch) | |
| tree | 7f4815da1ae1a94ede4d35aeb32b7ec2b32427e2 /palette.c | |
| download | vmdisp9x-503e91046f60a86823629d43e64e2d0fcc006549.tar.gz | |
public release
Diffstat (limited to 'palette.c')
| -rw-r--r-- | palette.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/palette.c b/palette.c new file mode 100644 index 0000000..9721f0c --- /dev/null +++ b/palette.c @@ -0,0 +1,89 @@ +/*****************************************************************************
+
+Copyright (c) 2022 Michal Necasek
+
+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 THE
+AUTHORS OR COPYRIGHT HOLDERS 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.
+
+*****************************************************************************/
+
+/* Display driver palette (RAMDAC) functions. */
+
+#include "winhack.h"
+#include <gdidefs.h>
+#include <dibeng.h>
+#include "minidrv.h"
+#include <conio.h> /* For port I/O prototypes. */
+#include "boxvint.h" /* For VGA register definitions. */
+
+#ifdef SVGA
+#include "svga_all.h"
+
+#pragma code_seg( _INIT )
+
+static void __loadds __far SetColor(unsigned index, unsigned char r, unsigned char g, unsigned char b)
+{
+ UINT sIndex = SVGA_PALETTE_BASE + index*3;
+
+ SVGA_WriteReg(sIndex+0, r);
+ SVGA_WriteReg(sIndex+1, g);
+ SVGA_WriteReg(sIndex+2, b);
+}
+#endif
+
+#pragma code_seg( _TEXT )
+
+/* Load the VGA DAC with values from color table. */
+static void SetRAMDAC( UINT bStart, UINT bCount, RGBQUAD FAR *lpPal )
+{
+#ifdef SVGA
+ BYTE bIndex = bStart;
+
+ while( bCount-- ) {
+ SetColor(bIndex++, lpPal[bIndex].rgbRed, lpPal[bIndex].rgbGreen, lpPal[bIndex].rgbBlue);
+ }
+#else
+ BYTE bIndex = bStart;
+
+ /* The data format is too weird for BOXV_dac_set(). Do it by hand. */
+ outp( VGA_DAC_W_INDEX, bIndex ); /* Set starting index. */
+ while( bCount-- ) {
+ outp( VGA_DAC_DATA, lpPal[bIndex].rgbRed );
+ outp( VGA_DAC_DATA, lpPal[bIndex].rgbGreen );
+ outp( VGA_DAC_DATA, lpPal[bIndex].rgbBlue );
+ ++bIndex;
+ }
+#endif
+}
+
+/* Allow calls from the _INIT segment. */
+void __far SetRAMDAC_far( UINT bStart, UINT bCount, RGBQUAD FAR *lpPal )
+{
+ SetRAMDAC( bStart, bCount, lpPal );
+}
+
+UINT WINAPI __loadds SetPalette( UINT wStartIndex, UINT wNumEntries, LPVOID lpPalette )
+{
+ /* Let the DIB engine do what it can. */
+ DIB_SetPaletteExt( wStartIndex, wNumEntries, lpPalette, lpDriverPDevice );
+
+ if( !(lpDriverPDevice->deFlags & BUSY) )
+ SetRAMDAC( wStartIndex, wNumEntries, lpColorTable );
+
+ return( 0 );
+}
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