Mercurial > sdl-ios-xcode
view src/video/qtopia/SDL_QWin.h @ 3899:081aecdb0911 SDL-1.2
From: Gabriel Gambetta
To: SDL Mailing List <sdl@libsdl.org>
Date: Fri, 17 Nov 2006 00:39:29 -0200
Subject: [SDL] Alpha blending bug - fixed?
It turns out mm5 never got the correct value. This failed :
[...]
"movd %1, %%mm5\n\t"
: : "m" (amask), "m" (sf->Ashift) );
mm5 got 0xFF000018 instead of 0x00000018. However I did this :
Uint32 ashift = sf->Ashift;
[...]
"movd %1, %%mm5\n\t"
: : "m" (amask), "m" (ashift) );
and everything worked fine.
The only thing I could find out was that ashift is 32-bit aligned but
sf->Ashift isn't:
printf("ashift %8X [%d]\n", &ashift, (int)(&ashift) % 4);
printf("sf->Ashift %8X [%d]\n", &sf->Ashift, (int)(&sf->Ashift) % 4);
ashift at BFF0E0C4 [0]
sf->Ashift at 08AFB9CD [1]
Could this be the problem? If it is, the fix is extremely trivial.
Should I submit a patch?
--Gabriel
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Tue, 21 Nov 2006 23:17:00 +0000 |
parents | d910939febfa |
children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2006 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #ifndef _SDL_QWin_h #define _SDL_QWin_h #include <stdio.h> #include <qimage.h> #include <qpixmap.h> #include <qwidget.h> #include <qpainter.h> #include <qdirectpainter_qws.h> #include "SDL_events.h" extern "C" { #include "../../events/SDL_events_c.h" }; typedef enum { SDL_QT_NO_ROTATION = 0, SDL_QT_ROTATION_90, SDL_QT_ROTATION_270 } screenRotationT; extern screenRotationT screenRotation; class SDL_QWin : public QWidget { void QueueKey(QKeyEvent *e, int pressed); public: SDL_QWin(const QSize& size); virtual ~SDL_QWin(); virtual bool shown(void) { return isVisible(); } /* If called, the next resize event will not be forwarded to SDL. */ virtual void inhibitResize(void) { my_inhibit_resize = true; } void setImage(QImage *image); void setOffset(int x, int y) { my_offset = QPoint(x, y); } void GetXYOffset(int &x, int &y) { x = my_offset.x(); y = my_offset.y(); } QImage *image(void) { return my_image; } void setWFlags(WFlags flags) { QWidget::setWFlags(flags); my_flags = flags; } const QPoint& mousePos() const { return my_mouse_pos; } void setMousePos(const QPoint& newpos); void setFullscreen(bool); bool lockScreen(bool force=false); void unlockScreen(); void repaintRect(const QRect& rect); protected: /* Handle resizing of the window */ virtual void resizeEvent(QResizeEvent *e); void focusInEvent(QFocusEvent *); void focusOutEvent(QFocusEvent *); void closeEvent(QCloseEvent *e); void mouseMoveEvent(QMouseEvent *e); void mousePressEvent(QMouseEvent *e); void mouseReleaseEvent(QMouseEvent *e); void paintEvent(QPaintEvent *ev); void keyPressEvent(QKeyEvent *e) { QueueKey(e, 1); } void keyReleaseEvent(QKeyEvent *e) { QueueKey(e, 0); } private: bool repaintRotation0(const QRect& rect); bool repaintRotation1(const QRect& rect); bool repaintRotation3(const QRect& rect); void enableFullscreen(); QDirectPainter *my_painter; QImage *my_image; bool my_inhibit_resize; QPoint my_offset; QPoint my_mouse_pos; WFlags my_flags; WFlags my_has_fullscreen; unsigned int my_locked; }; #endif /* _SDL_QWin_h */