Mercurial > sdl-ios-xcode
view src/video/x11/SDL_x11opengles.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 | c68d2ca5970f |
| children | f7b03b6838cb |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org Open Pandora SDL driver Copyright (C) 2009 David Carré (cpasjuste@gmail.com) */ #include <GLES/gl.h> #include <GLES/egl.h> #include <dlfcn.h> #if defined(__OpenBSD__) && !defined(__ELF__) #define dlsym(x,y) dlsym(x, "_" y) #endif #include "../SDL_sysvideo.h" typedef struct SDL_PrivateGLESData { int egl_active; /* to stop switching drivers while we have a valid context */ XVisualInfo *egl_visualinfo; EGLDisplay egl_display; EGLContext egl_context; /* Current GLES context */ EGLSurface egl_surface; EGLConfig egl_config; EGLDisplay(*eglGetDisplay) (NativeDisplayType display); EGLBoolean(*eglInitialize) (EGLDisplay dpy, EGLint * major, EGLint * minor); EGLBoolean(*eglTerminate) (EGLDisplay dpy); void *(*eglGetProcAddress) (const GLubyte * procName); EGLBoolean(*eglChooseConfig) (EGLDisplay dpy, const EGLint * attrib_list, EGLConfig * configs, EGLint config_size, EGLint * num_config); EGLContext(*eglCreateContext) (EGLDisplay dpy, EGLConfig config, EGLContext share_list, const EGLint * attrib_list); EGLBoolean(*eglDestroyContext) (EGLDisplay dpy, EGLContext ctx); EGLSurface(*eglCreateWindowSurface) (EGLDisplay dpy, EGLConfig config, NativeWindowType window, const EGLint * attrib_list); EGLBoolean(*eglDestroySurface) (EGLDisplay dpy, EGLSurface surface); EGLBoolean(*eglMakeCurrent) (EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx); EGLBoolean(*eglSwapBuffers) (EGLDisplay dpy, EGLSurface draw); const char *(*eglQueryString) (EGLDisplay dpy, EGLint name); EGLBoolean(*eglGetConfigAttrib) (EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint * value); } SDL_PrivateGLESData; /* OpenGLES functions */ extern SDL_GLContext X11_GLES_CreateContext(_THIS, SDL_Window * window); extern XVisualInfo *X11_GLES_GetVisual(_THIS, Display * display, int screen); extern int X11_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context); extern int X11_GLES_GetAttribute(_THIS, SDL_GLattr attrib, int *value); extern int X11_GLES_LoadLibrary(_THIS, const char *path); extern void *X11_GLES_GetProcAddress(_THIS, const char *proc); extern void X11_GLES_UnloadLibrary(_THIS); extern int X11_GLES_SetSwapInterval(_THIS, int interval); extern int X11_GLES_GetSwapInterval(_THIS); extern void X11_GLES_SwapWindow(_THIS, SDL_Window * window); extern void X11_GLES_DeleteContext(_THIS, SDL_GLContext context);