Mercurial > sdl-ios-xcode
annotate src/video/riscos/SDL_riscosvideo.c @ 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 | f7b03b6838cb |
| rev | line source |
|---|---|
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1 /* |
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2 SDL - Simple DirectMedia Layer |
| 2859 | 3 Copyright (C) 1997-2009 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 /* |
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25 File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability |
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26 23 March 2003 |
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27 |
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28 Implements RISC OS display device management. |
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29 Routines for full screen and wimp modes are split |
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30 into other source files. |
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31 */ |
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32 |
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33 #include "SDL_video.h" |
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34 #include "SDL_mouse.h" |
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35 #include "SDL_syswm.h" |
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36 #include "../SDL_sysvideo.h" |
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37 #include "../SDL_pixels_c.h" |
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38 #include "../../events/SDL_events_c.h" |
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39 |
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40 #include "SDL_riscostask.h" |
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41 #include "SDL_riscosvideo.h" |
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42 #include "SDL_riscosevents_c.h" |
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43 #include "SDL_riscosmouse_c.h" |
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44 |
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45 #include "kernel.h" |
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46 #include "swis.h" |
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47 |
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48 #define RISCOSVID_DRIVER_NAME "riscos" |
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49 |
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50 /* Initialization/Query functions */ |
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51 static int RISCOS_VideoInit(_THIS, SDL_PixelFormat * vformat); |
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52 static void RISCOS_VideoQuit(_THIS); |
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53 |
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54 static SDL_Rect **RISCOS_ListModes(_THIS, SDL_PixelFormat * format, |
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55 Uint32 flags); |
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56 static SDL_Surface *RISCOS_SetVideoMode(_THIS, SDL_Surface * current, |
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57 int width, int height, int bpp, |
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58 Uint32 flags); |
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59 |
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60 int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo * info); |
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61 |
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62 int RISCOS_ToggleFullScreen(_THIS, int fullscreen); |
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63 /* Mouse checking */ |
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64 void RISCOS_CheckMouseMode(_THIS); |
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65 extern SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode); |
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66 |
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67 /* Fullscreen mode functions */ |
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68 extern SDL_Surface *FULLSCREEN_SetVideoMode(_THIS, SDL_Surface * current, |
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69 int width, int height, int bpp, |
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70 Uint32 flags); |
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71 extern void FULLSCREEN_BuildModeList(_THIS); |
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72 extern void FULLSCREEN_SetDeviceMode(_THIS); |
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73 extern int FULLSCREEN_ToggleFromWimp(_THIS); |
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74 |
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75 /* Wimp mode functions */ |
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76 extern SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface * current, |
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77 int width, int height, int bpp, |
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78 Uint32 flags); |
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79 extern void WIMP_DeleteWindow(_THIS); |
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80 extern int WIMP_ToggleFromFullScreen(_THIS); |
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81 |
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82 /* Hardware surface functions - common to WIMP and FULLSCREEN */ |
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83 static int RISCOS_AllocHWSurface(_THIS, SDL_Surface * surface); |
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84 static int RISCOS_LockHWSurface(_THIS, SDL_Surface * surface); |
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85 static void RISCOS_UnlockHWSurface(_THIS, SDL_Surface * surface); |
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86 static void RISCOS_FreeHWSurface(_THIS, SDL_Surface * surface); |
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87 |
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88 /* RISC OS driver bootstrap functions */ |
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89 |
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90 static int |
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91 RISCOS_Available(void) |
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92 { |
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93 return (1); |
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94 } |
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95 |
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96 static void |
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97 RISCOS_DeleteDevice(SDL_VideoDevice * device) |
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98 { |
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99 SDL_free(device->hidden); |
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100 SDL_free(device); |
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101 } |
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102 |
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103 static SDL_VideoDevice * |
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104 RISCOS_CreateDevice(int devindex) |
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105 { |
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106 SDL_VideoDevice *device; |
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107 |
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108 /* Initialize all variables that we clean on shutdown */ |
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109 device = (SDL_VideoDevice *) SDL_malloc(sizeof(SDL_VideoDevice)); |
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110 if (device) { |
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111 SDL_memset(device, 0, (sizeof *device)); |
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112 device->hidden = (struct SDL_PrivateVideoData *) |
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113 SDL_malloc((sizeof *device->hidden)); |
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114 } |
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115 if ((device == NULL) || (device->hidden == NULL)) { |
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116 SDL_OutOfMemory(); |
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117 if (device) { |
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118 SDL_free(device); |
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119 } |
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120 return (0); |
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121 } |
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122 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
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123 |
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124 /* Set the function pointers */ |
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125 device->VideoInit = RISCOS_VideoInit; |
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126 device->VideoQuit = RISCOS_VideoQuit; |
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127 |
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128 device->ListModes = RISCOS_ListModes; |
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129 device->SetVideoMode = RISCOS_SetVideoMode; |
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130 device->CreateYUVOverlay = NULL; |
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131 device->AllocHWSurface = RISCOS_AllocHWSurface; |
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132 device->CheckHWBlit = NULL; |
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133 device->FillHWRect = NULL; |
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134 device->SetHWColorKey = NULL; |
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135 device->SetHWAlpha = NULL; |
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136 device->LockHWSurface = RISCOS_LockHWSurface; |
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137 device->UnlockHWSurface = RISCOS_UnlockHWSurface; |
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138 device->FreeHWSurface = RISCOS_FreeHWSurface; |
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139 |
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140 device->FreeWMCursor = RISCOS_FreeWMCursor; |
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141 device->CreateWMCursor = RISCOS_CreateWMCursor; |
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142 device->CheckMouseMode = RISCOS_CheckMouseMode; |
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143 device->GrabInput = RISCOS_GrabInput; |
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144 |
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145 device->InitOSKeymap = RISCOS_InitOSKeymap; |
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146 |
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147 device->GetWMInfo = RISCOS_GetWmInfo; |
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148 |
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149 device->free = RISCOS_DeleteDevice; |
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150 |
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151 /* Can't get Toggle screen to work if program starts up in Full screen mode so |
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152 disable it here and re-enable it when a wimp screen is chosen */ |
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153 device->ToggleFullScreen = NULL; /*RISCOS_ToggleFullScreen; */ |
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154 |
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155 /* Set other entries for fullscreen mode */ |
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156 FULLSCREEN_SetDeviceMode(device); |
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157 |
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158 /* Mouse pointer needs to use the WIMP ShowCursor version so |
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159 that it doesn't modify the pointer until the SDL Window is |
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160 entered or the application goes full screen */ |
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161 device->ShowWMCursor = WIMP_ShowWMCursor; |
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162 |
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163 return device; |
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164 } |
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165 |
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166 VideoBootStrap RISCOS_bootstrap = { |
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167 RISCOSVID_DRIVER_NAME, "RISC OS video driver", |
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168 RISCOS_Available, RISCOS_CreateDevice |
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169 }; |
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170 |
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171 |
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172 int |
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173 RISCOS_VideoInit(_THIS, SDL_PixelFormat * vformat) |
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174 { |
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175 _kernel_swi_regs regs; |
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176 int vars[4], vals[3]; |
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177 |
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178 if (RISCOS_InitTask() == 0) { |
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179 SDL_SetError("Unable to start task"); |
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180 return 0; |
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181 } |
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182 |
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183 vars[0] = 9; /* Log base 2 bpp */ |
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184 vars[1] = 11; /* XWndLimit - num x pixels -1 */ |
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185 vars[2] = 12; /* YWndLimit - num y pixels -1 */ |
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186 vars[3] = -1; /* Terminate list */ |
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187 regs.r[0] = (int) vars; |
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188 regs.r[1] = (int) vals; |
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189 |
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190 _kernel_swi(OS_ReadVduVariables, ®s, ®s); |
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191 vformat->BitsPerPixel = (1 << vals[0]); |
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192 |
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193 /* Determine the current screen size */ |
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194 this->info.current_w = vals[1] + 1; |
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195 this->info.current_h = vals[2] + 1; |
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196 |
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197 /* Minimum bpp for SDL is 8 */ |
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198 if (vformat->BitsPerPixel < 8) |
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199 vformat->BitsPerPixel = 8; |
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200 |
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201 |
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202 switch (vformat->BitsPerPixel) { |
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203 case 15: |
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204 case 16: |
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205 vformat->Bmask = 0x00007c00; |
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206 vformat->Gmask = 0x000003e0; |
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207 vformat->Rmask = 0x0000001f; |
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208 vformat->BitsPerPixel = 16; /* SDL wants actual number of bits used */ |
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209 vformat->BytesPerPixel = 2; |
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210 break; |
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211 |
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212 case 24: |
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213 case 32: |
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214 vformat->Bmask = 0x00ff0000; |
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215 vformat->Gmask = 0x0000ff00; |
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216 vformat->Rmask = 0x000000ff; |
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217 vformat->BytesPerPixel = 4; |
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218 break; |
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219 |
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220 default: |
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221 vformat->Bmask = 0; |
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222 vformat->Gmask = 0; |
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223 vformat->Rmask = 0; |
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224 vformat->BytesPerPixel = 1; |
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225 break; |
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226 } |
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227 |
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228 /* Fill in some window manager capabilities */ |
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229 this->info.wm_available = 1; |
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230 |
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231 /* We're done! */ |
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232 return (0); |
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233 } |
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234 |
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235 /* Note: If we are terminated, this could be called in the middle of |
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236 another SDL video routine -- notably UpdateRects. |
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237 */ |
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238 void |
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239 RISCOS_VideoQuit(_THIS) |
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240 { |
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241 RISCOS_ExitTask(); |
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242 |
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243 if (this->hidden->alloc_bank) |
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244 SDL_free(this->hidden->alloc_bank); |
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245 this->hidden->alloc_bank = 0; |
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246 } |
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247 |
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248 |
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249 SDL_Rect ** |
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250 RISCOS_ListModes(_THIS, SDL_PixelFormat * format, Uint32 flags) |
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251 { |
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252 if (flags & SDL_FULLSCREEN) { |
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253 /* Build mode list when first required. */ |
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254 if (SDL_nummodes[0] == 0) |
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255 FULLSCREEN_BuildModeList(this); |
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256 |
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257 return (SDL_modelist[((format->BitsPerPixel + 7) / 8) - 1]); |
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258 } else |
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259 return (SDL_Rect **) - 1; |
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260 } |
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261 |
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262 |
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263 /* Set up video mode */ |
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264 SDL_Surface * |
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265 RISCOS_SetVideoMode(_THIS, SDL_Surface * current, |
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266 int width, int height, int bpp, Uint32 flags) |
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267 { |
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268 if (flags & SDL_FULLSCREEN) { |
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269 RISCOS_StoreWimpMode(); |
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270 /* Dump wimp window on switch to full screen */ |
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271 if (this->hidden->window_handle) |
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272 WIMP_DeleteWindow(this); |
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273 |
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274 return FULLSCREEN_SetVideoMode(this, current, width, height, bpp, |
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275 flags); |
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276 } else { |
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277 RISCOS_RestoreWimpMode(); |
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278 return WIMP_SetVideoMode(this, current, width, height, bpp, flags); |
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279 } |
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280 } |
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281 |
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282 |
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283 /* We don't actually allow hardware surfaces other than the main one */ |
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284 static int |
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285 RISCOS_AllocHWSurface(_THIS, SDL_Surface * surface) |
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286 { |
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287 return (-1); |
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288 } |
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289 |
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290 static void |
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291 RISCOS_FreeHWSurface(_THIS, SDL_Surface * surface) |
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292 { |
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293 return; |
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294 } |
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295 |
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296 /* We need to wait for vertical retrace on page flipped displays */ |
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297 static int |
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298 RISCOS_LockHWSurface(_THIS, SDL_Surface * surface) |
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299 { |
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300 return (0); |
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301 } |
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302 |
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303 static void |
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304 RISCOS_UnlockHWSurface(_THIS, SDL_Surface * surface) |
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305 { |
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306 return; |
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307 } |
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308 |
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309 |
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310 int |
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311 RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo * info) |
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312 { |
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313 SDL_VERSION(&(info->version)); |
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314 info->wimpVersion = RISCOS_GetWimpVersion(); |
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315 info->taskHandle = RISCOS_GetTaskHandle(); |
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316 info->window = this->hidden->window_handle; |
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317 |
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318 return 1; |
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319 } |
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320 |
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321 /* Toggle full screen mode. |
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322 Returns 1 if successful otherwise 0 |
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323 */ |
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324 |
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325 int |
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326 RISCOS_ToggleFullScreen(_THIS, int fullscreen) |
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327 { |
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328 if (fullscreen) { |
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329 return FULLSCREEN_ToggleFromWimp(this); |
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330 } else { |
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331 return WIMP_ToggleFromFullScreen(this); |
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332 } |
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333 |
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334 return 0; |
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335 } |
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336 |
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337 /* vi: set ts=4 sw=4 expandtab: */ |