dri/nouveau: Clean up magic numbers in get_rt_format

Signed-off-by: Viktor Novotný <noviktor@seznam.cz>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>

src/mesa/drivers/dri/nouveau/nv04_state_fb.c

@@ -36,11 +36,11 @@ get_rt_format(gl_format format)
 {
 	switch (format) {
 	case MESA_FORMAT_XRGB8888:
-		return 0x05;
+		return NV04_CONTEXT_SURFACES_3D_FORMAT_COLOR_X8R8G8B8_X8R8G8B8;
 	case MESA_FORMAT_ARGB8888:
-		return 0x08;
+		return NV04_CONTEXT_SURFACES_3D_FORMAT_COLOR_A8R8G8B8;
 	case MESA_FORMAT_RGB565:
-		return 0x03;
+		return NV04_CONTEXT_SURFACES_3D_FORMAT_COLOR_R5G6B5;
 	default:
 		assert(0);
 	}

src/mesa/drivers/dri/nouveau/nv10_state_fb.c

@@ -37,15 +37,15 @@ get_rt_format(gl_format format)
 {
 	switch (format) {
 	case MESA_FORMAT_XRGB8888:
-		return 0x05;
+		return NV10_3D_RT_FORMAT_COLOR_X8R8G8B8;
 	case MESA_FORMAT_ARGB8888:
-		return 0x08;
+		return NV10_3D_RT_FORMAT_COLOR_A8R8G8B8;
 	case MESA_FORMAT_RGB565:
-		return 0x03;
+		return NV10_3D_RT_FORMAT_COLOR_R5G6B5;
 	case MESA_FORMAT_Z16:
-		return 0x10;
+		return NV10_3D_RT_FORMAT_DEPTH_Z16;
 	case MESA_FORMAT_Z24_S8:
-		return 0x0;
+		return NV10_3D_RT_FORMAT_DEPTH_Z24S8;
 	default:
 		assert(0);
 	}

src/mesa/drivers/dri/nouveau/nv20_state_fb.c

@@ -37,15 +37,15 @@ get_rt_format(gl_format format)
 {
 	switch (format) {
 	case MESA_FORMAT_XRGB8888:
-		return 0x05;
+		return NV20_3D_RT_FORMAT_COLOR_X8R8G8B8;
 	case MESA_FORMAT_ARGB8888:
-		return 0x08;
+		return NV20_3D_RT_FORMAT_COLOR_A8R8G8B8;
 	case MESA_FORMAT_RGB565:
-		return 0x03;
+		return NV20_3D_RT_FORMAT_COLOR_R5G6B5;
 	case MESA_FORMAT_Z16:
-		return 0x10;
+		return NV20_3D_RT_FORMAT_DEPTH_Z16;
 	case MESA_FORMAT_Z24_S8:
-		return 0x20;
+		return NV20_3D_RT_FORMAT_DEPTH_Z24S8;
 	default:
 		assert(0);
 	}