Mercurial > sdl-ios-xcode
view src/video/uikit/SDL_uikitvideo.m @ 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 | 99210400e8b9 |
children | 8b18669c2663 |
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/* 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 */ #include "SDL_config.h" #include "SDL_video.h" #include "SDL_mouse.h" #include "../SDL_sysvideo.h" #include "../SDL_pixels_c.h" #include "../../events/SDL_events_c.h" #include "SDL_uikitvideo.h" #include "SDL_uikitevents.h" #include "SDL_uikitwindow.h" #include "SDL_uikitopengles.h" #include "SDL_renderer_sw.h" #include "SDL_renderer_gles.h" #define UIKITVID_DRIVER_NAME "uikit" /* Initialization/Query functions */ static int UIKit_VideoInit(_THIS); static int UIKit_SetDisplayMode(_THIS, SDL_DisplayMode * mode); static void UIKit_VideoQuit(_THIS); /* DUMMY driver bootstrap functions */ static int UIKit_Available(void) { return (1); } static void UIKit_DeleteDevice(SDL_VideoDevice * device) { SDL_free(device); } static SDL_VideoDevice * UIKit_CreateDevice(int devindex) { SDL_VideoDevice *device; /* Initialize all variables that we clean on shutdown */ device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice)); if (!device) { SDL_OutOfMemory(); if (device) { SDL_free(device); } return (0); } /* Set the function pointers */ device->VideoInit = UIKit_VideoInit; device->VideoQuit = UIKit_VideoQuit; device->SetDisplayMode = UIKit_SetDisplayMode; device->PumpEvents = UIKit_PumpEvents; device->CreateWindow = UIKit_CreateWindow; device->DestroyWindow = UIKit_DestroyWindow; /* OpenGL (ES) functions */ device->GL_MakeCurrent = UIKit_GL_MakeCurrent; device->GL_SwapWindow = UIKit_GL_SwapWindow; device->GL_CreateContext = UIKit_GL_CreateContext; device->GL_DeleteContext = UIKit_GL_DeleteContext; device->GL_GetProcAddress = UIKit_GL_GetProcAddress; device->GL_LoadLibrary = UIKit_GL_LoadLibrary; device->free = UIKit_DeleteDevice; device->gl_config.accelerated = 1; return device; } VideoBootStrap UIKIT_bootstrap = { UIKITVID_DRIVER_NAME, "SDL UIKit video driver", UIKit_Available, UIKit_CreateDevice }; int UIKit_VideoInit(_THIS) { SDL_DisplayMode mode; _this->gl_config.driver_loaded = 1; SDL_VideoDisplay display; SDL_zero(display); /* Use a 32-bpp desktop mode */ SDL_zero(mode); mode.format = SDL_PIXELFORMAT_ABGR8888; mode.w = 320; mode.h = 480; mode.refresh_rate = 0; mode.driverdata = NULL; display.num_display_modes = 1; display.max_display_modes = 1; display.display_modes = (SDL_DisplayMode *)SDL_malloc(display.max_display_modes * sizeof(SDL_DisplayMode)); display.display_modes[0] = mode; display.desktop_mode = mode; display.fullscreen_mode = mode; display.current_mode = mode; SDL_AddVideoDisplay(&display); /* We're done! */ return 0; } static int UIKit_SetDisplayMode(_THIS, SDL_DisplayMode * mode) { return 0; } void UIKit_VideoQuit(_THIS) { } /* vi: set ts=4 sw=4 expandtab: */