Usermode/Applications/axwin3_src/WM/wm.c

   1 /*
   2  * Acess2 Window Manager v3
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * wm.c
   6  * - Window manager core
   7  */
   8 #include <common.h>
   9 #include <wm_renderer.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <video.h>
  13
  14 // === GLOBALS ===
  15 tWMRenderer     *gpWM_Renderers;
  16 tWindow *gpWM_RootWindow;
  17
  18 // === CODE ===
  19 void WM_Initialise(void)
  20 {
  21         WM_CreateWindow(NULL, 0x0088FF, "Background");
  22         gpWM_RootWindow->W = giScreenWidth;
  23         gpWM_RootWindow->H = giScreenHeight;
  24         gpWM_RootWindow->Flags = WINFLAG_SHOW;
  25 }
  26
  27 void WM_RegisterRenderer(tWMRenderer *Renderer)
  28 {
  29         // TODO: Catch out duplicates
  30         Renderer->Next = gpWM_Renderers;
  31         gpWM_Renderers = Renderer;
  32 }
  33
  34 // --- Manipulation
  35 tWindow *WM_CreateWindow(tWindow *Parent, int RendererArg, const char *RendererName)
  36 {
  37         tWMRenderer     *renderer;
  38         tWindow *ret;
  39
  40         // - Get Renderer
  41         for( renderer = gpWM_Renderers; renderer; renderer = renderer->Next )
  42         {
  43                 if(strcmp(RendererName, renderer->Name) == 0)
  44                         break;
  45         }
  46         if(renderer == NULL)
  47                 return NULL;
  48
  49         // - Call create window function
  50         ret = renderer->CreateWindow(RendererArg);
  51         ret->Parent = Parent;
  52         ret->Renderer = renderer;
  53
  54         if(!Parent)
  55                 Parent = gpWM_RootWindow;
  56
  57         // Append to parent
  58         if(Parent)
  59         {
  60                 if(Parent->LastChild)
  61                         Parent->LastChild->NextSibling = ret;
  62                 else
  63                         Parent->FirstChild = ret;
  64                 ret->PrevSibling = Parent->LastChild;
  65                 Parent->LastChild = ret;
  66         }
  67         else
  68         {
  69                 gpWM_RootWindow = ret;
  70         }
  71
  72         // - Return!
  73         return ret;
  74 }
  75
  76 tWindow *WM_CreateWindowStruct(size_t ExtraSize)
  77 {
  78         tWindow *ret;
  79
  80         ret = calloc( sizeof(tWindow) + ExtraSize, 1 );
  81         ret->RendererInfo = ret + 1;    // Get end of tWindow
  82
  83         return ret;
  84 }
  85
  86 void WM_ShowWindow(tWindow *Window, int bShow)
  87 {
  88         // TODO: Message window
  89         if(bShow)
  90                 Window->Flags |= WINFLAG_SHOW;
  91         else
  92                 Window->Flags &= ~WINFLAG_SHOW;
  93 }
  94
  95 int WM_MoveWindow(tWindow *Window, int X, int Y)
  96 {
  97         // Clip coordinates
  98         if(X + Window->W < 0)   X = -Window->W + 1;
  99         if(Y + Window->H < 0)   Y = -Window->H + 1;
 100         if(X >= giScreenWidth)  X = giScreenWidth - 1;
 101         if(Y >= giScreenHeight) Y = giScreenHeight - 1;
 102
 103         Window->X = X;  Window->Y = Y;
 104
 105         return 0;
 106 }
 107
 108 int WM_ResizeWindow(tWindow *Window, int W, int H)
 109 {
 110         if(W <= 0 || H <= 0 )   return 1;
 111         if(Window->X + W < 0)   Window->X = -W + 1;
 112         if(Window->Y + H < 0)   Window->Y = -H + 1;
 113
 114         Window->W = W;  Window->H = H;
 115
 116         return 0;
 117 }
 118
 119 // --- Rendering / Update
 120 void WM_int_UpdateWindow(tWindow *Window)
 121 {
 122         tWindow *child;
 123
 124         // Ignore hidden windows
 125         if( !(Window->Flags & WINFLAG_SHOW) )
 126                 return ;
 127         // Ignore unchanged windows
 128         if( Window->Flags & WINFLAG_CLEAN )
 129                 return;
 130
 131         // Render
 132         Window->Renderer->Redraw(Window);
 133
 134         // Process children
 135         for( child = Window->FirstChild; child; child = child->NextSibling )
 136         {
 137                 WM_int_UpdateWindow(child);
 138         }
 139
 140         Window->Flags |= WINFLAG_CLEAN;
 141 }
 142
 143 void WM_int_BlitWindow(tWindow *Window)
 144 {
 145         tWindow *child;
 146
 147         // Ignore hidden windows
 148         if( !(Window->Flags & WINFLAG_SHOW) )
 149                 return ;
 150
 151         Video_Blit(Window->RenderBuffer, Window->X, Window->Y, Window->W, Window->H);
 152
 153         for( child = Window->FirstChild; child; child = child->NextSibling )
 154         {
 155                 WM_int_BlitWindow(child);
 156         }
 157 }
 158
 159 void WM_Update(void)
 160 {
 161         // Don't redraw if nothing has changed
 162         if( gpWM_RootWindow->Flags & WINFLAG_CLEAN )
 163                 return ;
 164
 165         // - Iterate through visible windows, updating them as needed
 166         WM_int_UpdateWindow(gpWM_RootWindow);
 167
 168         // - Draw windows from back to front to the render buffer
 169         WM_int_BlitWindow(gpWM_RootWindow);
 170
 171         Video_Update();
 172 }
 173
 174 // --- WM Render Routines
 175 // TODO: Move to another file?
 176 void WM_Render_FilledRect(tWindow *Window, tColour Colour, int X, int Y, int W, int H)
 177 {
 178         uint32_t        *dest;
 179          int    i;
 180         _SysDebug("WM_Render_FilledRect(%p, 0x%x...", Window, Colour);
 181         _SysDebug(" (%i,%i), %ix%i)", X, Y, W, H);
 182         // Clip to window dimensions
 183         if(X < 0) { W += X; X = 0; }
 184         if(Y < 0) { H += Y; Y = 0; }
 185         if(X >= Window->W)      return;
 186         if(Y >= Window->H)      return;
 187         if(X + W > Window->W)   W = Window->W - X;
 188         if(Y + H > Window->H)   H = Window->H - Y;
 189         _SysDebug(" Clipped to (%i,%i), %ix%i", X, Y, W, H);
 190
 191         // Render to buffer
 192         // Create if needed?
 193
 194         if(!Window->RenderBuffer) {
 195                 Window->RenderBuffer = malloc(Window->W*Window->H*4);
 196         }
 197
 198         dest = (uint32_t*)Window->RenderBuffer + Y*Window->W + X;
 199         while( H -- )
 200         {
 201                 for( i = W; i --; )
 202                         *dest++ = Colour;
 203                 dest += Window->W - W;
 204         }
 205 }
 206