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authorIan Romanick <ian.d.romanick@intel.com>2009-12-08 21:10:45 -0800
committerIan Romanick <ian.d.romanick@intel.com>2009-12-10 15:12:30 -0800
commitffc1f299e9eaa6eaa4b5586b9fb13132564bd3ae (patch)
treee930622d7659f977d14441ed394f0aac53cf0fd3 /src/mesa/drivers/dri/common/spantmp2.h
parent430876cd3a70d3b701d136b825518140888f96c8 (diff)
spantmp2: Add support for GL_BGR / GL_UNSIGNED_INT_8_8_8_8_REV
This is really for MESA_FORMAT_XRGB8888. Clearly spantmp2.h needs some re-work. Any volunteers?
Diffstat (limited to 'src/mesa/drivers/dri/common/spantmp2.h')
-rw-r--r--src/mesa/drivers/dri/common/spantmp2.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/common/spantmp2.h b/src/mesa/drivers/dri/common/spantmp2.h
index 95f97414a9..447f3d15b9 100644
--- a/src/mesa/drivers/dri/common/spantmp2.h
+++ b/src/mesa/drivers/dri/common/spantmp2.h
@@ -356,6 +356,63 @@
} while (0)
# endif
+#elif (SPANTMP_PIXEL_FMT == GL_BGR) && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
+
+/**
+ ** GL_BGR, GL_UNSIGNED_INT_8_8_8_8_REV
+ **
+ ** This is really for MESA_FORMAT_XRGB8888. The spantmp code needs to be
+ ** kicked to the curb, and we need to just code-gen this.
+ **/
+
+#ifndef GET_VALUE
+#ifndef GET_PTR
+#define GET_PTR(_x, _y) ( buf + (_x) * 4 + (_y) * pitch)
+#endif
+
+#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))
+#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)
+#endif /* GET_VALUE */
+
+# define INIT_MONO_PIXEL(p, color) \
+ p = PACK_COLOR_8888(0xff, color[0], color[1], color[2])
+
+# define WRITE_RGBA(_x, _y, r, g, b, a) \
+ PUT_VALUE(_x, _y, ((r << 16) | \
+ (g << 8) | \
+ (b << 0) | \
+ (0xff << 24)))
+
+#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)
+
+# if defined( USE_X86_ASM )
+# define READ_RGBA(rgba, _x, _y) \
+ do { \
+ GLuint p = GET_VALUE(_x, _y); \
+ __asm__ __volatile__( "bswap %0; rorl $8, %0" \
+ : "=r" (p) : "0" (p) ); \
+ ((GLuint *)rgba)[0] = p | 0xff000000; \
+ } while (0)
+# elif defined( MESA_BIG_ENDIAN )
+ /* On PowerPC with GCC 3.4.2 the shift madness below becomes a single
+ * rotlwi instruction. It also produces good code on SPARC.
+ */
+# define READ_RGBA( rgba, _x, _y ) \
+ do { \
+ GLuint p = GET_VALUE(_x, _y); \
+ *((uint32_t *) rgba) = (t << 8) | 0xff; \
+ } while (0)
+# else
+# define READ_RGBA( rgba, _x, _y ) \
+ do { \
+ GLuint p = GET_VALUE(_x, _y); \
+ rgba[0] = (p >> 16) & 0xff; \
+ rgba[1] = (p >> 8) & 0xff; \
+ rgba[2] = (p >> 0) & 0xff; \
+ rgba[3] = 0xff; \
+ } while (0)
+# endif
+
#else
#error SPANTMP_PIXEL_FMT must be set to a valid value!
#endif