dri/swrast: add support for r3g3b2

3 files changed, 96 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/swrast/swrast.c b/src/mesa/drivers/dri/swrast/swrast.c
index 2622935af9..6a9eb1573b 100644
--- a/src/mesa/drivers/dri/swrast/swrast.c
+++ b/src/mesa/drivers/dri/swrast/swrast.c
@@ -145,7 +145,11 @@ swrastFillInModes(__DRIscreen *psp,
     depth_buffer_factor = 4;
     back_buffer_factor = 2;
 
-    if (pixel_bits == 16) {
+    if (pixel_bits == 8) {
+	fb_format = GL_RGB;
+	fb_type = GL_UNSIGNED_BYTE_2_3_3_REV;
+    }
+    else if (pixel_bits == 16) {
 	fb_format = GL_RGB;
 	fb_type = GL_UNSIGNED_SHORT_5_6_5;
     }
@@ -173,6 +177,7 @@ driCreateNewScreen(int scrn, const __DRIextension **extensions,
 {
     static const __DRIextension *emptyExtensionList[] = { NULL };
     __DRIscreen *psp;
+    __DRIconfig **configs8, **configs16, **configs32;
 
     (void) data;
 
@@ -187,8 +192,13 @@ driCreateNewScreen(int scrn, const __DRIextension **extensions,
     psp->num = scrn;
     psp->extensions = emptyExtensionList;
 
-    *driver_configs = driConcatConfigs(swrastFillInModes(psp, 16, 16, 0, 1),
-				       swrastFillInModes(psp, 32, 24, 8, 1));
+    configs8  = swrastFillInModes(psp,  8,  8, 0, 1);
+    configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
+    configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
+
+    configs16 = (__DRIconfig **)driConcatConfigs(configs8, configs16);
+
+    *driver_configs = driConcatConfigs(configs16, configs32);
 
     driInitExtensions( NULL, card_extensions, GL_FALSE );
 
@@ -235,6 +245,11 @@ choose_pixel_format(const GLvisual *v)
 	    && v->greenMask == 0x07e0
 	    && v->blueMask  == 0x001f)
 	    return PF_R5G6B5;
+	else if (bpp == 8
+	    && v->redMask   == 0x07
+	    && v->greenMask == 0x38
+	    && v->blueMask  == 0xc0)
+	    return PF_R3G3B2;
     }
     else {
 	if (v->indexBits == 8)
@@ -347,6 +362,15 @@ swrast_new_renderbuffer(const GLvisual *visual, GLboolean front)
 	    xrb->Base.BlueBits  = 5 * sizeof(GLubyte);
 	    xrb->Base.AlphaBits = 0;
 	    break;
+	case PF_R3G3B2:
+	    xrb->Base.InternalFormat = GL_RGB;
+	    xrb->Base._BaseFormat = GL_RGB;
+	    xrb->Base.DataType = GL_UNSIGNED_BYTE;
+	    xrb->Base.RedBits   = 3 * sizeof(GLubyte);
+	    xrb->Base.GreenBits = 3 * sizeof(GLubyte);
+	    xrb->Base.BlueBits  = 2 * sizeof(GLubyte);
+	    xrb->Base.AlphaBits = 0;
+	    break;
 	case PF_CI8:
 	    xrb->Base.InternalFormat = GL_COLOR_INDEX8_EXT;
 	    xrb->Base._BaseFormat = GL_COLOR_INDEX;
diff --git a/src/mesa/drivers/dri/swrast/swrast_priv.h b/src/mesa/drivers/dri/swrast/swrast_priv.h
index d801f88f07..e12743bd56 100644
--- a/src/mesa/drivers/dri/swrast/swrast_priv.h
+++ b/src/mesa/drivers/dri/swrast/swrast_priv.h
@@ -111,6 +111,7 @@ swrast_renderbuffer(struct gl_renderbuffer *rb)
 #define PF_CI8        1		/**< Color Index mode */
 #define PF_A8R8G8B8   2		/**< 32-bit TrueColor:  8-A, 8-R, 8-G, 8-B bits */
 #define PF_R5G6B5     3		/**< 16-bit TrueColor:  5-R, 6-G, 5-B bits */
+#define PF_R3G3B2     4		/**<  8-bit TrueColor:  3-R, 3-G, 2-B bits */
 
 
 /* swrast_span.c */
diff --git a/src/mesa/drivers/dri/swrast/swrast_span.c b/src/mesa/drivers/dri/swrast/swrast_span.c
index d11d1d36ae..4613a12113 100644
--- a/src/mesa/drivers/dri/swrast/swrast_span.c
+++ b/src/mesa/drivers/dri/swrast/swrast_span.c
@@ -71,6 +71,24 @@
    } while(0)
 
 
+/* 8-bit BGR */
+#define STORE_PIXEL_R3G3B2(DST, X, Y, VALUE) \
+   do { \
+   GLubyte *p = (GLubyte *)DST; \
+   *p = ( (((VALUE[RCOMP]) & 0xe0) >> 5) | \
+	  (((VALUE[GCOMP]) & 0xe0) >> 2) | \
+	  (((VALUE[BCOMP]) & 0xc0) >> 0) ); \
+   } while(0)
+#define FETCH_PIXEL_R3G3B2(DST, SRC) \
+   do { \
+   GLubyte p = *(GLubyte *)SRC; \
+   DST[ACOMP] = 0xff; \
+   DST[RCOMP] = ((p << 5) & 0xe0) * 255 / 0xe0; \
+   DST[GCOMP] = ((p << 2) & 0xe0) * 255 / 0xe0; \
+   DST[BCOMP] = ((p << 0) & 0xc0) * 255 / 0xc0; \
+   } while(0)
+
+
 /*
  * Generate code for image span functions.
  */
@@ -109,6 +127,22 @@
 #include "swrast/s_spantemp.h"
 
 
+/* 8-bit BGR */
+#define NAME(FUNC) FUNC##_R3G3B2
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 1;
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_R3G3B2(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_R3G3B2(DST, SRC)
+
+#include "swrast/s_spantemp.h"
+
+
 /* 8-bit color index */
 #define NAME(FUNC) FUNC##_CI8
 #define CI_MODE
@@ -164,6 +198,22 @@
 #include "swrast_spantemp.h"
 
 
+/* 8-bit BGR */
+#define NAME(FUNC) FUNC##_R3G3B2_pixmap
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)row;
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_R3G3B2(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_R3G3B2(DST, SRC)
+
+#include "swrast_spantemp.h"
+
+
 /* 8-bit color index */
 #define NAME(FUNC) FUNC##_CI8_pixmap
 #define CI_MODE
@@ -210,6 +260,15 @@ swrast_set_span_funcs_ximage(struct swrast_renderbuffer *xrb,
 	xrb->Base.PutValues = put_values_R5G6B5;
 	xrb->Base.PutMonoValues = put_mono_values_R5G6B5;
 	break;
+    case PF_R3G3B2:
+	xrb->Base.GetRow = get_row_R3G3B2;
+	xrb->Base.GetValues = get_values_R3G3B2;
+	xrb->Base.PutRow = put_row_R3G3B2;
+	xrb->Base.PutRowRGB = put_row_rgb_R3G3B2;
+	xrb->Base.PutMonoRow = put_mono_row_R3G3B2;
+	xrb->Base.PutValues = put_values_R3G3B2;
+	xrb->Base.PutMonoValues = put_mono_values_R3G3B2;
+	break;
     case PF_CI8:
 	xrb->Base.GetRow = get_row_CI8;
 	xrb->Base.GetValues = get_values_CI8;
@@ -256,6 +315,15 @@ swrast_set_span_funcs_pixmap(struct swrast_renderbuffer *xrb,
 	xrb->Base.PutValues = put_values_R5G6B5_pixmap;
 	xrb->Base.PutMonoValues = put_mono_values_R5G6B5_pixmap;
 	break;
+    case PF_R3G3B2:
+	xrb->Base.GetRow = get_row_R3G3B2_pixmap;
+	xrb->Base.GetValues = get_values_R3G3B2_pixmap;
+	xrb->Base.PutRow = put_row_R3G3B2_pixmap;
+	xrb->Base.PutRowRGB = put_row_rgb_R3G3B2_pixmap;
+	xrb->Base.PutMonoRow = put_mono_row_R3G3B2_pixmap;
+	xrb->Base.PutValues = put_values_R3G3B2_pixmap;
+	xrb->Base.PutMonoValues = put_mono_values_R3G3B2_pixmap;
+	break;
     case PF_CI8:
 	xrb->Base.GetRow = get_row_CI8_pixmap;
 	xrb->Base.GetValues = get_values_CI8_pixmap;