fbc6daa1dc
Support for 16-bit and 32-bit Truecolor modes was supposed to be complete in r70991 of main.c and in nearby revisions for other files, but it was broken by the overruns in most cases (all cases were the mouse is enabled, and most cases where bitmaps are used). r70991 also uninintentionally added support for depths 9-15, 17-23 and 25-31. Depth 24 was more obviously broken and its support is ifdefed out. In the other ranges, only depth 15 is common. It was broken by buffer overruns in all cases. bitmap.c: - the static buffer was used even when it was too small (but it was large enough to often work accidentally in depth 16) - the size of the dynamically allocated buffer was too small - the sizing info bitmap->PixelBytes was not inititialzed in the bitmap constructor. It often ended up as 0 for MEMBUFs, so using it in more places gave more null pointer accesses. (It is per-bitmap, but since conversion between bitmaps of different depths is not supported (except from 4 bits by padding to 8), it would work better if it were global.) main.c: - depths were rounded down instead of up to a multiple of 8, so PixelBytes was 1 too small for depths above 8 except 16, 24 and 32. - PixelBytes was not initialized for 4-bit planar modes. It isn't really used for frame buffer accesses in these modes, but needs to be 1 in MEMBUF images. mouse.c: - the mouse cursor buffers were too small. vgl.h: - PixelBytes was not initialized in the static bitmap constructor. It should be initialized to the value for the current mode, but that is impossible in a static constructor. Initialize it to -1 so as to fail if it is used without further initialization. All modes that are supposed to be supported now don't crash in nontrivial tests, and almost work. Missing uses of PixelBytes now give in-bounds wrong pointers instead of overruns. Misconversions of bitmaps give multiple miscolored mouse cursors instead of 1 white one, and similarly for bitmaps copied through a MEMBUF.
157 lines
5.3 KiB
C
157 lines
5.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1991-1997 Søren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _VGL_H_
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#define _VGL_H_
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <machine/cpufunc.h>
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typedef unsigned char byte;
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typedef struct {
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byte Type;
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int Xsize, Ysize;
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int VXsize, VYsize;
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int Xorigin, Yorigin;
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byte *Bitmap;
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int PixelBytes;
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} VGLBitmap;
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#define VGLBITMAP_INITIALIZER(t, x, y, bits) \
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{ (t), (x), (y), (x), (y), 0, 0, (bits), -1 }
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/*
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* Defined Type's
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*/
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#define MEMBUF 0
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#define VIDBUF4 1
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#define VIDBUF8 2
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#define VIDBUF8X 3
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#define VIDBUF8S 4
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#define VIDBUF4S 5
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#define VIDBUF16 6 /* Direct Color linear buffer */
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#define VIDBUF24 7 /* Direct Color linear buffer */
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#define VIDBUF32 8 /* Direct Color linear buffer */
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#define VIDBUF16S 9 /* Direct Color segmented buffer */
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#define VIDBUF24S 10 /* Direct Color segmented buffer */
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#define VIDBUF32S 11 /* Direct Color segmented buffer */
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#define NOBUF 255
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typedef struct VGLText {
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byte Width, Height;
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byte *BitmapArray;
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} VGLText;
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typedef struct VGLObject {
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int Id;
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int Type;
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int Status;
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int Xpos, Ypos;
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int Xhot, Yhot;
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VGLBitmap *Image;
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VGLBitmap *Mask;
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int (*CallBackFunction)();
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} VGLObject;
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#define MOUSE_IMG_SIZE 16
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#define VGL_MOUSEHIDE 0
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#define VGL_MOUSESHOW 1
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#define VGL_MOUSEFREEZE 0
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#define VGL_MOUSEUNFREEZE 1
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#define VGL_DIR_RIGHT 0
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#define VGL_DIR_UP 1
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#define VGL_DIR_LEFT 2
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#define VGL_DIR_DOWN 3
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#define VGL_RAWKEYS 1
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#define VGL_CODEKEYS 2
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#define VGL_XLATEKEYS 3
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extern video_adapter_info_t VGLAdpInfo;
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extern video_info_t VGLModeInfo;
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extern VGLBitmap *VGLDisplay;
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extern byte *VGLBuf;
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/*
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* Prototypes
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*/
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/* bitmap.c */
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int __VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy, VGLBitmap *dst, int dstx, int dsty, int width, int hight);
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int VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy, VGLBitmap *dst, int dstx, int dsty, int width, int hight);
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VGLBitmap *VGLBitmapCreate(int type, int xsize, int ysize, byte *bits);
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void VGLBitmapDestroy(VGLBitmap *object);
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int VGLBitmapAllocateBits(VGLBitmap *object);
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/* keyboard.c */
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int VGLKeyboardInit(int mode);
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void VGLKeyboardEnd(void);
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int VGLKeyboardGetCh(void);
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/* main.c */
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void VGLEnd(void);
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int VGLInit(int mode);
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void VGLCheckSwitch(void);
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int VGLSetVScreenSize(VGLBitmap *object, int VXsize, int VYsize);
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int VGLPanScreen(VGLBitmap *object, int x, int y);
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int VGLSetSegment(unsigned int offset);
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/* mouse.c */
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void VGLMousePointerShow(void);
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void VGLMousePointerHide(void);
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void VGLMouseMode(int mode);
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void VGLMouseAction(int dummy);
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void VGLMouseSetImage(VGLBitmap *AndMask, VGLBitmap *OrMask);
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void VGLMouseSetStdImage(void);
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int VGLMouseInit(int mode);
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int VGLMouseStatus(int *x, int *y, char *buttons);
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int VGLMouseFreeze(int x, int y, int width, int hight, byte color);
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void VGLMouseUnFreeze(void);
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/* simple.c */
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void VGLSetXY(VGLBitmap *object, int x, int y, u_long color);
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u_long VGLGetXY(VGLBitmap *object, int x, int y);
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void VGLLine(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color);
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void VGLBox(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color);
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void VGLFilledBox(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color);
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void VGLEllipse(VGLBitmap *object, int xc, int yc, int a, int b, u_long color);
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void VGLFilledEllipse(VGLBitmap *object, int xc, int yc, int a, int b, u_long color);
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void VGLClear(VGLBitmap *object, u_long color);
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void VGLRestorePalette(void);
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void VGLSavePalette(void);
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void VGLSetPalette(byte *red, byte *green, byte *blue);
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void VGLSetPaletteIndex(byte color, byte red, byte green, byte blue);
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void VGLSetBorder(byte color);
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void VGLBlankDisplay(int blank);
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/* text.c */
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int VGLTextSetFontFile(char *filename);
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void VGLBitmapPutChar(VGLBitmap *Object, int x, int y, byte ch, byte fgcol, byte bgcol, int fill, int dir);
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void VGLBitmapString(VGLBitmap *Object, int x, int y, char *str, byte fgcol, byte bgcol, int fill, int dir);
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#endif /* !_VGL_H_ */
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