Mercurial > sdl-ios-xcode
view src/video/Xext/extensions/xf86dga.h @ 3485:e77a69aae239
Mason Wheeler to sdl
I updated SDL, and suddenly my SDL frames stopped working. They'd "initialize" full of gibberish, and I couldn't render anything to them. After a bit of digging, I found a problem: the renderer initialization routine in my SDL frame code wasn't getting called anymore.
procedure TSdlFrame.Paint;
begin
if SDL_SelectRenderer(FWindowID) = -1 then
CreateRenderer;
SDL_RenderPresent;
end;
function TSdlFrame.CreateRenderer: boolean;
const
pf: tagPIXELFORMATDESCRIPTOR = (nSize: sizeof(pf); nVersion: 1;
dwFlags: PFD_DRAW_TO_WINDOW or PFD_SUPPORT_OPENGL or PFD_DOUBLEBUFFER;
iPixelType: PFD_TYPE_RGBA; cColorBits: 24; cAlphaBits: 8;
iLayerType: PFD_MAIN_PLANE);
RENDERERS: array[TRendererType] of AnsiString = ('software', 'gdi', 'opengl', 'd3d');
var
pFormat: integer;
begin
if (SDL_SelectRenderer(FWindowID) = 0) then
begin
result := true;
Exit;
end;
if FRendererType = rtOpenGL then
begin
pFormat := ChoosePixelFormat(canvas.Handle, @pf);
if not SetPixelFormat(canvas.Handle, pFormat, @pf) then
outputDebugString(PChar(SysErrorMessage(GetLastError)));
if wglCreateContext(canvas.Handle) = 0 then
outputDebugString(PChar(SysErrorMessage(GetLastError)));
end;
if (SDL_CreateRenderer(FWindowID, SDL_RendererIndex(RENDERERS[FRendererType]), [sdlrPresentFlip3, sdlrAccelerated]) = 0) then
begin
SDL_ShowWindow(FWindowID);
assert(SDL_SetRenderDrawColor(0, 0, 0, 255) = 0);
FFlags := SDL_GetWindowFlags(FWindowID);
if assigned(FOnAvailable) then
FOnAvailable(self);
end
else outputDebugString(pChar(format('SDL_CreateRenderer failed: %s', [sdl_GetError])));
result := SDL_SelectRenderer(FWindowID) = 0;
end;
This is a critical issue. The Paint method gets called when the control receives a WM_PAINT message from Windows. I can't create the renderer before then, or it will fail and cause trouble. And when I do create it, it needs to be created with certain parameters. So imagine my surprise when I started debugging into the DLL and found that SDL_SelectRenderer was trying to be "helpful" by creating the renderer for me if it didn't already exist! Now not only does my initialization code not get called, I end up with the wrong renderer and so things don't render as expected when I try to use the window.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Tue, 24 Nov 2009 04:48:12 +0000 |
parents | c121d94672cb |
children |
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/* Copyright (c) 1999 XFree86 Inc */ /* $XFree86: xc/include/extensions/xf86dga.h,v 3.21 2001/08/01 00:44:36 tsi Exp $ */ #ifndef _XF86DGA_H_ #define _XF86DGA_H_ #include <X11/Xfuncproto.h> #include "xf86dga1.h" #include "SDL_name.h" #define X_XDGAQueryVersion 0 /* 1 through 9 are in xf86dga1.h */ /* 10 and 11 are reserved to avoid conflicts with rogue DGA extensions */ #define X_XDGAQueryModes 12 #define X_XDGASetMode 13 #define X_XDGASetViewport 14 #define X_XDGAInstallColormap 15 #define X_XDGASelectInput 16 #define X_XDGAFillRectangle 17 #define X_XDGACopyArea 18 #define X_XDGACopyTransparentArea 19 #define X_XDGAGetViewportStatus 20 #define X_XDGASync 21 #define X_XDGAOpenFramebuffer 22 #define X_XDGACloseFramebuffer 23 #define X_XDGASetClientVersion 24 #define X_XDGAChangePixmapMode 25 #define X_XDGACreateColormap 26 #define XDGAConcurrentAccess 0x00000001 #define XDGASolidFillRect 0x00000002 #define XDGABlitRect 0x00000004 #define XDGABlitTransRect 0x00000008 #define XDGAPixmap 0x00000010 #define XDGAInterlaced 0x00010000 #define XDGADoublescan 0x00020000 #define XDGAFlipImmediate 0x00000001 #define XDGAFlipRetrace 0x00000002 #define XDGANeedRoot 0x00000001 #define XF86DGANumberEvents 7 #define XDGAPixmapModeLarge 0 #define XDGAPixmapModeSmall 1 #define XF86DGAClientNotLocal 0 #define XF86DGANoDirectVideoMode 1 #define XF86DGAScreenNotActive 2 #define XF86DGADirectNotActivated 3 #define XF86DGAOperationNotSupported 4 #define XF86DGANumberErrors (XF86DGAOperationNotSupported + 1) typedef struct { int num; /* A unique identifier for the mode (num > 0) */ char *name; /* name of mode given in the XF86Config */ float verticalRefresh; int flags; /* DGA_CONCURRENT_ACCESS, etc... */ int imageWidth; /* linear accessible portion (pixels) */ int imageHeight; int pixmapWidth; /* Xlib accessible portion (pixels) */ int pixmapHeight; /* both fields ignored if no concurrent access */ int bytesPerScanline; int byteOrder; /* MSBFirst, LSBFirst */ int depth; int bitsPerPixel; unsigned long redMask; unsigned long greenMask; unsigned long blueMask; short visualClass; int viewportWidth; int viewportHeight; int xViewportStep; /* viewport position granularity */ int yViewportStep; int maxViewportX; /* max viewport origin */ int maxViewportY; int viewportFlags; /* types of page flipping possible */ int reserved1; int reserved2; } SDL_NAME(XDGAMode); typedef struct { SDL_NAME(XDGAMode) mode; unsigned char *data; Pixmap pixmap; } SDL_NAME(XDGADevice); #ifndef _XF86DGA_SERVER_ _XFUNCPROTOBEGIN typedef struct { int type; unsigned long serial; Display *display; int screen; Time time; unsigned int state; unsigned int button; } SDL_NAME(XDGAButtonEvent); typedef struct { int type; unsigned long serial; Display *display; int screen; Time time; unsigned int state; unsigned int keycode; } SDL_NAME(XDGAKeyEvent); typedef struct { int type; unsigned long serial; Display *display; int screen; Time time; unsigned int state; int dx; int dy; } SDL_NAME(XDGAMotionEvent); typedef union { int type; SDL_NAME(XDGAButtonEvent) xbutton; SDL_NAME(XDGAKeyEvent) xkey; SDL_NAME(XDGAMotionEvent) xmotion; long pad[24]; } SDL_NAME(XDGAEvent); Bool SDL_NAME(XDGAQueryExtension) (Display * dpy, int *eventBase, int *erroBase); Bool SDL_NAME(XDGAQueryVersion) (Display * dpy, int *majorVersion, int *minorVersion); SDL_NAME(XDGAMode) * SDL_NAME(XDGAQueryModes) (Display * dpy, int screen, int *num); SDL_NAME(XDGADevice) * SDL_NAME(XDGASetMode) (Display * dpy, int screen, int mode); Bool SDL_NAME(XDGAOpenFramebuffer) (Display * dpy, int screen); void SDL_NAME(XDGACloseFramebuffer) (Display * dpy, int screen); void SDL_NAME(XDGASetViewport) (Display * dpy, int screen, int x, int y, int flags); void SDL_NAME(XDGAInstallColormap) (Display * dpy, int screen, Colormap cmap); Colormap SDL_NAME(XDGACreateColormap) (Display * dpy, int screen, SDL_NAME(XDGADevice) * device, int alloc); void SDL_NAME(XDGASelectInput) (Display * dpy, int screen, long event_mask); void SDL_NAME(XDGAFillRectangle) (Display * dpy, int screen, int x, int y, unsigned int width, unsigned int height, unsigned long color); void SDL_NAME(XDGACopyArea) (Display * dpy, int screen, int srcx, int srcy, unsigned int width, unsigned int height, int dstx, int dsty); void SDL_NAME(XDGACopyTransparentArea) (Display * dpy, int screen, int srcx, int srcy, unsigned int width, unsigned int height, int dstx, int dsty, unsigned long key); int SDL_NAME(XDGAGetViewportStatus) (Display * dpy, int screen); void SDL_NAME(XDGASync) (Display * dpy, int screen); Bool SDL_NAME(XDGASetClientVersion) (Display * dpy); void SDL_NAME(XDGAChangePixmapMode) (Display * dpy, int screen, int *x, int *y, int mode); void SDL_NAME(XDGAKeyEventToXKeyEvent) (SDL_NAME(XDGAKeyEvent) * dk, XKeyEvent * xk); _XFUNCPROTOEND #endif /* _XF86DGA_SERVER_ */ #endif /* _XF86DGA_H_ */ /* vi: set ts=4 sw=4 expandtab: */