ref_soft: Implement internal color tables

r_context.c

@@ -623,6 +623,13 @@ qboolean R_Init()
 {
 	gl_emboss_scale = gEngfuncs.Cvar_Get( "gl_emboss_scale", "0", FCVAR_ARCHIVE|FCVAR_LATCH, "fake bumpmapping scale" );
 	// create the window and set up the context
+	r_temppool = Mem_AllocPool( "ref_sw zone" );
+
+	vid.width = 1920;
+	vid.height = 1080;
+	vid.rowbytes = 1920; // rowpixels
+
+	vid.buffer = Mem_Malloc( r_temppool, 1920*1080*sizeof( pixel_t ) );
 	if( !gEngfuncs.R_Init_Video( REF_GL )) // request GL context
 	{
 		gEngfuncs.R_Free_Video();
@@ -630,12 +637,7 @@ qboolean R_Init()
 		gEngfuncs.Host_Error( "Can't initialize video subsystem\nProbably driver was not installed" );
 		return false;
 	}
-	r_temppool = Mem_AllocPool( "ref_sw zone" );
-	vid.width = 1920;
-	vid.height = 1080;
-	vid.rowbytes = 1920; // rowpixels
 
-	vid.buffer = Mem_Malloc( r_temppool, 1920*1080*sizeof( pixel_t ) );
 
 	R_InitImages();
 	return true;

r_glblit.c

@@ -35,10 +35,12 @@ static void APIENTRY GL_DebugOutput( GLuint source, GLuint type, GLuint id, GLui
 	}
 }
 int tex;
+unsigned short *buffer;
 
 #define LOAD(x) p##x = gEngfuncs.GL_GetProcAddress(#x)
 void R_InitBlit()
 {
+	int i;
 	LOAD(glBegin);
 	LOAD(glEnd);
 	LOAD(glTexCoord2f);
@@ -69,12 +71,39 @@ void R_InitBlit()
 	// enable all the low priority messages
 	pglDebugMessageControlARB( GL_DONT_CARE, GL_DONT_CARE, GL_DEBUG_SEVERITY_LOW_ARB, 0, NULL, true );
 	pglGenTextures( 1, &tex );
-}
+	buffer = Mem_Malloc( r_temppool, 1920*1080*2 );
+
+	for( i = 0; i < 256; i++ )
+	{
+		unsigned int r,g,b;
 
+		// 332 to 565
+		r = ((i >> (8 - 3) )<< 2 ) & MASK(5);
+		g = ((i >> (8 - 3 - 3)) << 3) & MASK(6);
+		b = ((i >> (8 - 3 - 3 - 2)) << 3) & MASK(5);
+		vid.screen_major[i] = r << (6 + 5) | (g << 5) | b;
+
+		// restore minor GBRGBRGB
+		r = MOVE_BIT(i, 5, 1) | MOVE_BIT(i, 2, 0);
+		g = MOVE_BIT(i, 7, 2) | MOVE_BIT(i, 4, 1) | MOVE_BIT(i, 1, 0);
+		b = MOVE_BIT(i, 6, 2) | MOVE_BIT(i, 3, 1) | MOVE_BIT(i, 0, 0);
+		vid.screen_minor[i] = r << (6 + 5) | (g << 5) | b;
+	}
+}
 
 void R_BlitScreen()
 {
 	//memset( vid.buffer, 10, vid.width * vid.height );
+	int i;
+	byte *buf = vid.buffer;
+
+	for( i = 0; i < vid.width * vid.height;i++)
+	{
+		byte major = buf[(i<<1)+1];
+		byte minor = buf[(i<<1)];
+
+		buffer[i] = vid.screen_major[major]|vid.screen_minor[minor];
+	}
 	pglBindTexture(GL_TEXTURE_2D, tex);
 	pglViewport( 0, 0, gpGlobals->width, gpGlobals->height );
 	pglMatrixMode( GL_PROJECTION );
@@ -90,7 +119,7 @@ void R_BlitScreen()
 	pglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 	pglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 	//gEngfuncs.Con_Printf("%d\n",pglGetError());
-	pglTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vid.width, vid.height, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, vid.buffer );
+	pglTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vid.width, vid.height, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, buffer );
 	//gEngfuncs.Con_Printf("%d\n",pglGetError());
 	pglBegin( GL_QUADS );
 		pglTexCoord2f( 0, 0 );

r_image.c

@@ -503,24 +503,34 @@ static qboolean GL_UploadTexture( image_t *tex, rgbdata_t *pic )
 
 	gEngfuncs.Con_Printf("%s %d %d\n", tex->name, tex->width, tex->height );
 
+	Assert( pic != NULL );
+	Assert( tex != NULL );
+
 	if( !pic->buffer )
 		return true;
 
 	tex->pixels[0] = Mem_Calloc( r_temppool, tex->width * tex->height * sizeof(pixel_t) + 64 );
+
 	for( i = 0; i < tex->width * tex->height; i++ )
 	{
-		unsigned int r, g, b;
+		unsigned int r, g, b, major, minor;
+
 		r = pic->buffer[i * 4 + 0] * BIT(5) / 256;
 		g = pic->buffer[i * 4 + 1] * BIT(6) / 256;
 		b = pic->buffer[i * 4 + 2] * BIT(5) / 256;
 
-		/// TODO: use internal rgb565-based palette for textures and screen
-		tex->pixels[0][i] = r << (6 + 5) | (g << 5) | b;
+		// 565 to 332
+		major = (((r >> 2) & MASK(3)) << 5) |( (( (g >> 3) & MASK(3)) << 2 )  )| (((b >> 3) & MASK(2)));
+
+		// save minor GBRGBRGB
+		minor = MOVE_BIT(r,1,5) | MOVE_BIT(r,0,2) | MOVE_BIT(g,2,7) | MOVE_BIT(g,1,4) | MOVE_BIT(g,0,1) | MOVE_BIT(b,2,6)| MOVE_BIT(b,1,3)|MOVE_BIT(b,0,0);
+
+		tex->pixels[0][i] = major << 8 | (minor & 0xFF);
 	}
 
+	/// TODO: generate mipmaps
 #if 0
-	Assert( pic != NULL );
-	Assert( tex != NULL );
+
 
 	GL_SetTextureTarget( tex, pic ); // must be first
 

r_local.h

@@ -88,6 +88,11 @@ extern byte	*r_temppool;
 #define CULL_VISFRAME	3		// culled by PVS
 #define CULL_OTHER		4		// culled by other reason
 
+// bit operation helpers
+#define MASK(x) (BIT(x+1)-1)
+#define GET_BIT(s,b) ((s & (1 << b)) >> b)
+#define MOVE_BIT(s, f, t) (GET_BIT(s,f) << t )
+
 
 /*
   skins will be outline flood filled and mip mapped
@@ -124,6 +129,8 @@ typedef struct
 	pixel_t                 *buffer;                // invisible buffer
 	pixel_t                 *colormap;              // 256 * VID_GRADES size
 	pixel_t                 *alphamap;              // 256 * 256 translucency map
+	pixel_t					screen_minor[256];
+	pixel_t					screen_major[256];
 	int                             rowbytes;               // may be > width if displayed in a window
 									// can be negative for stupid dibs
 	int						width;