Composite commit (GUI / Networking)

[tpg/acess2.git] / Usermode / Applications / axwin2_src / WM / video.c

diff --git a/Usermode/Applications/axwin2_src/WM/video.c b/Usermode/Applications/axwin2_src/WM/video.c
index d17e0e5..7b56df7 100644 (file)
--- a/Usermode/Applications/axwin2_src/WM/video.c
+++ b/Usermode/Applications/axwin2_src/WM/video.c
@@ -5,6 +5,7 @@
 #include "common.h"
 #include <acess/sys.h>
 #include <acess/devices/terminal.h>
+#include <image.h>
 
 // === PROTOTYPES ===
 void   Video_Setup(void);
@@ -94,7 +95,85 @@ void Video_DrawRect(short X, short Y, short W, short H, uint32_t Color)
        Video_FillRect(X+W-1, Y, 1, H, Color);
 }
 
+/**
+ * \brief Draw text to the screen
+ */
 void Video_DrawText(short X, short Y, short W, short H, void *Font, int Point, uint32_t Color, char *Text)
 {
        // TODO!
 }
+
+/**
+ * \brief Draw an image to the screen
+ * \todo Maybe have support for an offset in the image
+ */
+void Video_DrawImage(short X, short Y, short W, short H, tImage *Image)
+{
+        int    x, y;
+       uint8_t *buf = (uint8_t *)(gpScreenBuffer + Y*giScreenWidth + X);
+       uint8_t *data = Image->Data;
+       
+       // Bounds Check
+       if( X >= giScreenWidth )        return ;
+       if( Y >= giScreenHeight )       return ;
+       
+       // Wrap to image size
+       if( W > Image->Width )  W = Image->Width;
+       if( H > Image->Height ) H = Image->Height;
+       
+       // Wrap to screen size
+       if( X + W > giScreenWidth )     W = giScreenWidth - X;
+       if( Y + H > giScreenHeight )    H = giScreenHeight - Y;
+       
+       switch( Image->Format )
+       {
+       case IMGFMT_BGRA:
+               for( y = 0; y < H; y ++ )
+               {
+                        int    r, g, b, a;     // New
+                        int    or, og, ob;     // Original
+                       for( x = 0; x < W; x ++ ) {
+                               b = data[x*4+0]; g = data[x*4+1]; r = data[x*4+2]; a = data[x*4+3];
+                               if( a == 0 )    continue;       // 100% transparent
+                               ob = buf[x*4+0]; og = buf[x*4+1]; or = buf[x*4+2];
+                               // Handle Alpha
+                               switch(a)
+                               {
+                               // Transparent: Handled above
+                               // Solid
+                               case 0xFF:      break;
+                               // Half
+                               case 0x80:
+                                       r = (or + r) / 2;
+                                       g = (og + g) / 2;
+                                       b = (ob + b) / 2;
+                                       break;
+                               // General
+                               default:
+                                       r = (or * (255-a) + r * a) / 255;
+                                       g = (og * (255-a) + g * a) / 255;
+                                       b = (ob * (255-a) + b * a) / 255;
+                                       break;
+                               }
+                               buf[x*4+0] = b; buf[x*4+1] = g; buf[x*4+2] = r;
+                       }
+                       data += Image->Width * 4;
+                       buf += giScreenWidth * 4;
+               }
+               break;
+       
+       // RGB
+       case IMGFMT_RGB:
+               for( y = 0; y < H; y ++ )
+               {
+                       for( x = 0; x < W; x ++ ) {
+                               buf[x*4+0] = data[x*3+2];       // Blue
+                               buf[x*4+1] = data[x*3+1];       // Green
+                               buf[x*4+2] = data[x*3+0];       // Red
+                       }
+                       data += W * 3;
+                       buf += giScreenWidth * 4;
+               }
+               break;
+       }
+}