st/mesa: bind NULL colorbuffers as specified by glDrawBuffers

[mesa.git] / src / gallium / auxiliary / util / u_pack_color.h

diff --git a/src/gallium/auxiliary/util/u_pack_color.h b/src/gallium/auxiliary/util/u_pack_color.h
index 9391f1b80e0c1899bc17107af6134dc1353e70e5..36252738d68227df7db9a6ce15f8f919d4d4fb53 100644 (file)
--- a/src/gallium/auxiliary/util/u_pack_color.h
+++ b/src/gallium/auxiliary/util/u_pack_color.h
@@ -52,6 +52,7 @@ union util_color {
    ubyte ub;
    ushort us;
    uint ui;
+   ushort h[4]; /* half float */
    float f[4];
    double d[4];
 };
@@ -64,32 +65,32 @@ util_pack_color_ub(ubyte r, ubyte g, ubyte b, ubyte a,
                    enum pipe_format format, union util_color *uc)
 {
    switch (format) {
-   case PIPE_FORMAT_A8B8G8R8_UNORM:
+   case PIPE_FORMAT_ABGR8888_UNORM:
       {
          uc->ui = (r << 24) | (g << 16) | (b << 8) | a;
       }
       return;
-   case PIPE_FORMAT_X8B8G8R8_UNORM:
+   case PIPE_FORMAT_XBGR8888_UNORM:
       {
          uc->ui = (r << 24) | (g << 16) | (b << 8) | 0xff;
       }
       return;
-   case PIPE_FORMAT_B8G8R8A8_UNORM:
+   case PIPE_FORMAT_BGRA8888_UNORM:
       {
          uc->ui = (a << 24) | (r << 16) | (g << 8) | b;
       }
       return;
-   case PIPE_FORMAT_B8G8R8X8_UNORM:
+   case PIPE_FORMAT_BGRX8888_UNORM:
       {
          uc->ui = (0xff << 24) | (r << 16) | (g << 8) | b;
       }
       return;
-   case PIPE_FORMAT_A8R8G8B8_UNORM:
+   case PIPE_FORMAT_ARGB8888_UNORM:
       {
          uc->ui = (b << 24) | (g << 16) | (r << 8) | a;
       }
       return;
-   case PIPE_FORMAT_X8R8G8B8_UNORM:
+   case PIPE_FORMAT_XRGB8888_UNORM:
       {
          uc->ui = (b << 24) | (g << 16) | (r << 8) | 0xff;
       }
@@ -122,7 +123,7 @@ util_pack_color_ub(ubyte r, ubyte g, ubyte b, ubyte a,
    case PIPE_FORMAT_L8_UNORM:
    case PIPE_FORMAT_I8_UNORM:
       {
-         uc->ub = a;
+         uc->ub = r;
       }
       return;
    case PIPE_FORMAT_R32G32B32A32_FLOAT:
@@ -165,7 +166,7 @@ util_unpack_color_ub(enum pipe_format format, union util_color *uc,
                      ubyte *r, ubyte *g, ubyte *b, ubyte *a)
 {
    switch (format) {
-   case PIPE_FORMAT_A8B8G8R8_UNORM:
+   case PIPE_FORMAT_ABGR8888_UNORM:
       {
          uint p = uc->ui;
          *r = (ubyte) ((p >> 24) & 0xff);
@@ -174,7 +175,7 @@ util_unpack_color_ub(enum pipe_format format, union util_color *uc,
          *a = (ubyte) ((p >>  0) & 0xff);
       }
       return;
-   case PIPE_FORMAT_X8B8G8R8_UNORM:
+   case PIPE_FORMAT_XBGR8888_UNORM:
       {
          uint p = uc->ui;
          *r = (ubyte) ((p >> 24) & 0xff);
@@ -183,7 +184,7 @@ util_unpack_color_ub(enum pipe_format format, union util_color *uc,
          *a = (ubyte) 0xff;
       }
       return;
-   case PIPE_FORMAT_B8G8R8A8_UNORM:
+   case PIPE_FORMAT_BGRA8888_UNORM:
       {
          uint p = uc->ui;
          *r = (ubyte) ((p >> 16) & 0xff);
@@ -192,7 +193,7 @@ util_unpack_color_ub(enum pipe_format format, union util_color *uc,
          *a = (ubyte) ((p >> 24) & 0xff);
       }
       return;
-   case PIPE_FORMAT_B8G8R8X8_UNORM:
+   case PIPE_FORMAT_BGRX8888_UNORM:
       {
          uint p = uc->ui;
          *r = (ubyte) ((p >> 16) & 0xff);
@@ -201,7 +202,7 @@ util_unpack_color_ub(enum pipe_format format, union util_color *uc,
          *a = (ubyte) 0xff;
       }
       return;
-   case PIPE_FORMAT_A8R8G8B8_UNORM:
+   case PIPE_FORMAT_ARGB8888_UNORM:
       {
          uint p = uc->ui;
          *r = (ubyte) ((p >>  8) & 0xff);
@@ -210,7 +211,7 @@ util_unpack_color_ub(enum pipe_format format, union util_color *uc,
          *a = (ubyte) ((p >>  0) & 0xff);
       }
       return;
-   case PIPE_FORMAT_X8R8G8B8_UNORM:
+   case PIPE_FORMAT_XRGB8888_UNORM:
       {
          uint p = uc->ui;
          *r = (ubyte) ((p >>  8) & 0xff);
@@ -329,6 +330,8 @@ util_unpack_color_ub(enum pipe_format format, union util_color *uc,
 
 /**
  * Note rgba outside [0,1] will be clamped for int pixel formats.
+ * This will not work (and might not really be useful with float input)
+ * for pure integer formats (which lack the pack_rgba_float function).
  */
 static INLINE void
 util_pack_color(const float rgba[4], enum pipe_format format, union util_color *uc)
@@ -347,32 +350,32 @@ util_pack_color(const float rgba[4], enum pipe_format format, union util_color *
    }
 
    switch (format) {
-   case PIPE_FORMAT_A8B8G8R8_UNORM:
+   case PIPE_FORMAT_ABGR8888_UNORM:
       {
          uc->ui = (r << 24) | (g << 16) | (b << 8) | a;
       }
       return;
-   case PIPE_FORMAT_X8B8G8R8_UNORM:
+   case PIPE_FORMAT_XBGR8888_UNORM:
       {
          uc->ui = (r << 24) | (g << 16) | (b << 8) | 0xff;
       }
       return;
-   case PIPE_FORMAT_B8G8R8A8_UNORM:
+   case PIPE_FORMAT_BGRA8888_UNORM:
       {
          uc->ui = (a << 24) | (r << 16) | (g << 8) | b;
       }
       return;
-   case PIPE_FORMAT_B8G8R8X8_UNORM:
+   case PIPE_FORMAT_BGRX8888_UNORM:
       {
          uc->ui = (0xff << 24) | (r << 16) | (g << 8) | b;
       }
       return;
-   case PIPE_FORMAT_A8R8G8B8_UNORM:
+   case PIPE_FORMAT_ARGB8888_UNORM:
       {
          uc->ui = (b << 24) | (g << 16) | (r << 8) | a;
       }
       return;
-   case PIPE_FORMAT_X8R8G8B8_UNORM:
+   case PIPE_FORMAT_XRGB8888_UNORM:
       {
          uc->ui = (b << 24) | (g << 16) | (r << 8) | 0xff;
       }
@@ -443,13 +446,13 @@ util_pack_mask_z(enum pipe_format format, uint32_t z)
    case PIPE_FORMAT_Z32_UNORM:
    case PIPE_FORMAT_Z32_FLOAT:
       return z;
-   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+   case PIPE_FORMAT_Z24_UNORM_S8_UINT:
    case PIPE_FORMAT_Z24X8_UNORM:
       return z & 0xffffff;
-   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+   case PIPE_FORMAT_S8_UINT_Z24_UNORM:
    case PIPE_FORMAT_X8Z24_UNORM:
       return (z & 0xffffff) << 8;
-   case PIPE_FORMAT_S8_USCALED:
+   case PIPE_FORMAT_S8_UINT:
       return 0;
    default:
       debug_print_format("gallium: unhandled format in util_pack_mask_z()", format);
@@ -463,7 +466,7 @@ static INLINE uint64_t
 util_pack64_mask_z(enum pipe_format format, uint32_t z)
 {
    switch (format) {
-   case PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED:
+   case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
       return z;
    default:
       return util_pack_mask_z(format, z);
@@ -477,13 +480,13 @@ util_pack_mask_z_stencil(enum pipe_format format, uint32_t z, uint8_t s)
    uint32_t packed = util_pack_mask_z(format, z);
 
    switch (format) {
-   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+   case PIPE_FORMAT_Z24_UNORM_S8_UINT:
       packed |= (uint32_t)s << 24;
       break;
-   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+   case PIPE_FORMAT_S8_UINT_Z24_UNORM:
       packed |= s;
       break;
-   case PIPE_FORMAT_S8_USCALED:
+   case PIPE_FORMAT_S8_UINT:
       packed |= s;
       break;
    default:
@@ -500,7 +503,7 @@ util_pack64_mask_z_stencil(enum pipe_format format, uint32_t z, uint8_t s)
    uint64_t packed;
 
    switch (format) {
-   case PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED:
+   case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
       packed = util_pack64_mask_z(format, z);
       packed |= (uint64_t)s << 32ull;
       return packed;
@@ -525,26 +528,26 @@ util_pack_z(enum pipe_format format, double z)
    case PIPE_FORMAT_Z16_UNORM:
       if (z == 1.0)
          return 0xffff;
-      return (uint32_t) (z * 0xffff);
+      return (uint32_t) lrint(z * 0xffff);
    case PIPE_FORMAT_Z32_UNORM:
       /* special-case to avoid overflow */
       if (z == 1.0)
          return 0xffffffff;
-      return (uint32_t) (z * 0xffffffff);
+      return (uint32_t) llrint(z * 0xffffffff);
    case PIPE_FORMAT_Z32_FLOAT:
       fui.f = (float)z;
       return fui.ui;
-   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+   case PIPE_FORMAT_Z24_UNORM_S8_UINT:
    case PIPE_FORMAT_Z24X8_UNORM:
       if (z == 1.0)
          return 0xffffff;
-      return (uint32_t) (z * 0xffffff);
-   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+      return (uint32_t) lrint(z * 0xffffff);
+   case PIPE_FORMAT_S8_UINT_Z24_UNORM:
    case PIPE_FORMAT_X8Z24_UNORM:
       if (z == 1.0)
          return 0xffffff00;
-      return ((uint32_t) (z * 0xffffff)) << 8;
-   case PIPE_FORMAT_S8_USCALED:
+      return ((uint32_t) lrint(z * 0xffffff)) << 8;
+   case PIPE_FORMAT_S8_UINT:
       /* this case can get it via util_pack_z_stencil() */
       return 0;
    default:
@@ -564,7 +567,7 @@ util_pack64_z(enum pipe_format format, double z)
       return 0;
 
    switch (format) {
-   case PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED:
+   case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
       fui.f = (float)z;
       return fui.ui;
    default:
@@ -583,13 +586,13 @@ util_pack_z_stencil(enum pipe_format format, double z, uint8_t s)
    uint32_t packed = util_pack_z(format, z);
 
    switch (format) {
-   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+   case PIPE_FORMAT_Z24_UNORM_S8_UINT:
       packed |= (uint32_t)s << 24;
       break;
-   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+   case PIPE_FORMAT_S8_UINT_Z24_UNORM:
       packed |= s;
       break;
-   case PIPE_FORMAT_S8_USCALED:
+   case PIPE_FORMAT_S8_UINT:
       packed |= s;
       break;
    default:
@@ -606,7 +609,7 @@ util_pack64_z_stencil(enum pipe_format format, double z, uint8_t s)
    uint64_t packed;
 
    switch (format) {
-   case PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED:
+   case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
       packed = util_pack64_z(format, z);
       packed |= (uint64_t)s << 32ull;
       break;