Mercurial > sdl-ios-xcode
view src/video/win32/SDL_gapirender_c.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 | 6338b7f2d024 |
children | f7b03b6838cb |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 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 Stefan Klug klug.stefan@gmx.de */ #define WIN32_LEAN_AND_MEAN #include <windows.h> /* hi res definitions */ typedef struct _RawFrameBufferInfo { WORD wFormat; WORD wBPP; VOID *pFramePointer; int cxStride; int cyStride; int cxPixels; int cyPixels; } RawFrameBufferInfo; #define GETRAWFRAMEBUFFER 0x00020001 #define FORMAT_565 1 #define FORMAT_555 2 #define FORMAT_OTHER 3 /* From gx.h, since it's not really C compliant */ struct GXDisplayProperties { DWORD cxWidth; DWORD cyHeight; // notice lack of 'th' in the word height. long cbxPitch; // number of bytes to move right one x pixel - can be negative. long cbyPitch; // number of bytes to move down one y pixel - can be negative. long cBPP; // # of bits in each pixel DWORD ffFormat; // format flags. }; struct GXKeyList { short vkUp; // key for up POINT ptUp; // x,y position of key/button. Not on screen but in screen coordinates. short vkDown; POINT ptDown; short vkLeft; POINT ptLeft; short vkRight; POINT ptRight; short vkA; POINT ptA; short vkB; POINT ptB; short vkC; POINT ptC; short vkStart; POINT ptStart; }; typedef int (*PFNGXOpenDisplay) (HWND hWnd, DWORD dwFlags); typedef int (*PFNGXCloseDisplay) (); typedef void *(*PFNGXBeginDraw) (); typedef int (*PFNGXEndDraw) (); typedef int (*PFNGXOpenInput) (); typedef int (*PFNGXCloseInput) (); typedef struct GXDisplayProperties (*PFNGXGetDisplayProperties) (); typedef struct GXKeyList (*PFNGXGetDefaultKeys) (int iOptions); typedef int (*PFNGXSuspend) (); typedef int (*PFNGXResume) (); typedef int (*PFNGXSetViewport) (DWORD dwTop, DWORD dwHeight, DWORD dwReserved1, DWORD dwReserved2); typedef BOOL(*PFNGXIsDisplayDRAMBuffer) (); struct GapiFunc { PFNGXOpenDisplay GXOpenDisplay; PFNGXCloseDisplay GXCloseDisplay; PFNGXBeginDraw GXBeginDraw; PFNGXEndDraw GXEndDraw; PFNGXOpenInput GXOpenInput; PFNGXCloseInput GXCloseInput; PFNGXGetDisplayProperties GXGetDisplayProperties; PFNGXGetDefaultKeys GXGetDefaultKeys; PFNGXSuspend GXSuspend; PFNGXResume GXResume; PFNGXSetViewport GXSetViewport; PFNGXIsDisplayDRAMBuffer GXIsDisplayDRAMBuffer; } gx; #define kfLandscape 0x8 // Screen is rotated 270 degrees #define kfPalette 0x10 // Pixel values are indexes into a palette #define kfDirect 0x20 // Pixel values contain actual level information #define kfDirect555 0x40 // 5 bits each for red, green and blue values in a pixel. #define kfDirect565 0x80 // 5 red bits, 6 green bits and 5 blue bits per pixel #define kfDirect888 0x100 // 8 bits each for red, green and blue values in a pixel. #define kfDirect444 0x200 // 4 red, 4 green, 4 blue #define kfDirectInverted 0x400 #define GX_FULLSCREEN 0x01 // for OpenDisplay() #define GX_NORMALKEYS 0x02 #define GX_LANDSCAPEKEYS 0x03