From c7432537b1a67e964ed1d7b35977049301dc9189 Mon Sep 17 00:00:00 2001 From: Bruce Evans Date: Wed, 24 Apr 2019 15:35:29 +0000 Subject: [PATCH] Refactor mouse freezing and fix some minor bugs. VGLMouseFreeze() now only defers mouse signals and leaves it to higher levels to hide and unhide the mouse cursor if necessary. (It is never necessary, but is done to simplify the implementation. It is slow and flashes the cursor. It is still done for copying bitmaps and clearing.) VGLMouseUnFreeze() now only undoes 1 level of freezing. Its old optimization to reduce mouse redrawing is too hard to do with unhiding in higher levels, and its undoing of multiple levels was a historical mistake. VGLMouseOverlap() determines if a region overlaps the (full) mouse region. VGLMouseFreezeXY() is the freezing and a precise overlap check combined for the special case of writing a single pixel. This is the single-pixel case of the old VGLMouseFreeze() with cleanups. Fixes: - check in more cases that the application didn't pass an invalid VIDBUF - check for errors from copying a bitmap to the shadow buffer - freeze the mouse before writing to the shadow buffer in all cases. This was not done for the case of writing a single pixel (there was a race) - don't spell the #defined values for VGLMouseShown as 0, 1 or boolean. --- lib/libvgl/bitmap.c | 21 ++++++++++--- lib/libvgl/mouse.c | 73 ++++++++++++++++++++++----------------------- lib/libvgl/simple.c | 30 ++++++++++++------- lib/libvgl/vgl.h | 4 ++- 4 files changed, 75 insertions(+), 53 deletions(-) diff --git a/lib/libvgl/bitmap.c b/lib/libvgl/bitmap.c index 17896a595d85..bea1e1db23e2 100644 --- a/lib/libvgl/bitmap.c +++ b/lib/libvgl/bitmap.c @@ -214,23 +214,36 @@ int VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy, VGLBitmap *dst, int dstx, int dsty, int width, int hight) { - int error; + int error, mouseoverlap; if (src == VGLDisplay) src = &VGLVDisplay; if (src->Type != MEMBUF) return -1; /* invalid */ if (dst == VGLDisplay) { - VGLMouseFreeze(dstx, dsty, width, hight, 0); - __VGLBitmapCopy(src, srcx, srcy, &VGLVDisplay, dstx, dsty, width, hight); + VGLMouseFreeze(); + mouseoverlap = VGLMouseOverlap(dstx, dsty, width, hight); + if (mouseoverlap) + VGLMousePointerHide(); + error = __VGLBitmapCopy(src, srcx, srcy, &VGLVDisplay, dstx, dsty, + width, hight); + if (error != 0) { + if (mouseoverlap) + VGLMousePointerShow(); + VGLMouseUnFreeze(); + return error; + } src = &VGLVDisplay; srcx = dstx; srcy = dsty; } else if (dst->Type != MEMBUF) return -1; /* invalid */ error = __VGLBitmapCopy(src, srcx, srcy, dst, dstx, dsty, width, hight); - if (dst == VGLDisplay) + if (dst == VGLDisplay) { + if (mouseoverlap) + VGLMousePointerShow(); VGLMouseUnFreeze(); + } return error; } diff --git a/lib/libvgl/mouse.c b/lib/libvgl/mouse.c index ca30102b853a..9796409ebcfe 100644 --- a/lib/libvgl/mouse.c +++ b/lib/libvgl/mouse.c @@ -89,7 +89,7 @@ static VGLBitmap VGLMouseStdOrMask = VGLBITMAP_INITIALIZER(MEMBUF, MOUSE_IMG_SIZE, MOUSE_IMG_SIZE, StdOrMask); static VGLBitmap *VGLMouseAndMask, *VGLMouseOrMask; static int VGLMouseVisible = 0; -static int VGLMouseShown = 0; +static int VGLMouseShown = VGL_MOUSEHIDE; static int VGLMouseXpos = 0; static int VGLMouseYpos = 0; static int VGLMouseButtons = 0; @@ -316,48 +316,47 @@ VGLMouseStatus(int *x, int *y, char *buttons) return VGLMouseShown; } -int -VGLMouseFreeze(int x, int y, int width, int hight, u_long color) +void +VGLMouseFreeze(void) { - INTOFF(); - if (width > 1 || hight > 1 || (color & 0xc0000000) == 0) { /* bitmap */ - if (VGLMouseShown == 1) { - int overlap; + INTOFF(); +} - if (x > VGLMouseXpos) - overlap = (VGLMouseXpos + MOUSE_IMG_SIZE) - x; - else - overlap = (x + width) - VGLMouseXpos; - if (overlap > 0) { - if (y > VGLMouseYpos) - overlap = (VGLMouseYpos + MOUSE_IMG_SIZE) - y; - else - overlap = (y + hight) - VGLMouseYpos; - if (overlap > 0) - VGLMousePointerHide(); - } - } - } - else { /* bit */ - if (VGLMouseShown && - x >= VGLMouseXpos && x < VGLMouseXpos + MOUSE_IMG_SIZE && - y >= VGLMouseYpos && y < VGLMouseYpos + MOUSE_IMG_SIZE) { - if (color & 0x80000000) { /* Set */ - if (VGLMouseAndMask->Bitmap - [(y-VGLMouseYpos)*MOUSE_IMG_SIZE+(x-VGLMouseXpos)]) { - return 1; - } - } - } - } +int +VGLMouseFreezeXY(int x, int y) +{ + INTOFF(); + if (VGLMouseShown != VGL_MOUSESHOW) + return 0; + if (x >= VGLMouseXpos && x < VGLMouseXpos + MOUSE_IMG_SIZE && + y >= VGLMouseYpos && y < VGLMouseYpos + MOUSE_IMG_SIZE && + VGLMouseAndMask->Bitmap[(y-VGLMouseYpos)*MOUSE_IMG_SIZE+(x-VGLMouseXpos)]) + return 1; return 0; } +int +VGLMouseOverlap(int x, int y, int width, int hight) +{ + int overlap; + + if (VGLMouseShown != VGL_MOUSESHOW) + return 0; + if (x > VGLMouseXpos) + overlap = (VGLMouseXpos + MOUSE_IMG_SIZE) - x; + else + overlap = (x + width) - VGLMouseXpos; + if (overlap <= 0) + return 0; + if (y > VGLMouseYpos) + overlap = (VGLMouseYpos + MOUSE_IMG_SIZE) - y; + else + overlap = (y + hight) - VGLMouseYpos; + return overlap > 0; +} + void VGLMouseUnFreeze() { - if (VGLMouseShown == VGL_MOUSESHOW && !VGLMouseVisible && !VGLMintpending) - VGLMousePointerShow(); - while (VGLMsuppressint) - INTON(); + INTON(); } diff --git a/lib/libvgl/simple.c b/lib/libvgl/simple.c index d5c36a84ed39..204b9afb440b 100644 --- a/lib/libvgl/simple.c +++ b/lib/libvgl/simple.c @@ -51,14 +51,18 @@ static byte VGLSavePaletteBlue[256]; void VGLSetXY(VGLBitmap *object, int x, int y, u_long color) { - int offset; + int offset, undermouse; VGLCheckSwitch(); if (x>=0 && xVXsize && y>=0 && yVYsize) { - if (object == VGLDisplay) + if (object == VGLDisplay) { + undermouse = VGLMouseFreezeXY(x, y); VGLSetXY(&VGLVDisplay, x, y, color); - if (object->Type == MEMBUF || - !VGLMouseFreeze(x, y, 1, 1, 0x80000000 | color)) { + } else if (object->Type != MEMBUF) + return; /* invalid */ + else + undermouse = 0; + if (!undermouse) { offset = (y * object->VXsize + x) * object->PixelBytes; switch (object->Type) { case VIDBUF8S: @@ -106,7 +110,7 @@ VGLSetXY(VGLBitmap *object, int x, int y, u_long color) object->Bitmap[offset] |= (byte)color; } } - if (object->Type != MEMBUF) + if (object == VGLDisplay) VGLMouseUnFreeze(); } } @@ -143,7 +147,7 @@ VGLGetXY(VGLBitmap *object, int x, int y) return 0; if (object == VGLDisplay) object = &VGLVDisplay; - if (object->Type != MEMBUF) + else if (object->Type != MEMBUF) return 0; /* invalid */ return __VGLGetXY(object, x, y); } @@ -449,13 +453,14 @@ void VGLClear(VGLBitmap *object, u_long color) { VGLBitmap src; - int offset; - int len; - int i; + int i, len, mouseoverlap, offset; VGLCheckSwitch(); if (object == VGLDisplay) { - VGLMouseFreeze(0, 0, object->Xsize, object->Ysize, color); + VGLMouseFreeze(); + mouseoverlap = VGLMouseOverlap(0, 0, object->Xsize, object->Ysize); + if (mouseoverlap) + VGLMousePointerHide(); VGLClear(&VGLVDisplay, color); } else if (object->Type != MEMBUF) return; /* invalid */ @@ -509,8 +514,11 @@ VGLClear(VGLBitmap *object, u_long color) outb(0x3ce, 0x05); outb(0x3cf, 0x00); break; } - if (object == VGLDisplay) + if (object == VGLDisplay) { + if (mouseoverlap) + VGLMousePointerShow(); VGLMouseUnFreeze(); + } } static inline u_long diff --git a/lib/libvgl/vgl.h b/lib/libvgl/vgl.h index 31d2f93f6ccd..c04f274f1abd 100644 --- a/lib/libvgl/vgl.h +++ b/lib/libvgl/vgl.h @@ -134,7 +134,9 @@ void VGLMouseSetStdImage(void); int VGLMouseInit(int mode); void VGLMouseRestore(void); int VGLMouseStatus(int *x, int *y, char *buttons); -int VGLMouseFreeze(int x, int y, int width, int hight, u_long color); +void VGLMouseFreeze(void); +int VGLMouseFreezeXY(int x, int y); +int VGLMouseOverlap(int x, int y, int width, int hight); void VGLMouseUnFreeze(void); /* simple.c */ void VGLSetXY(VGLBitmap *object, int x, int y, u_long color);