From c6164ff155189007c02aabb31549f5f4dc767d1b Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jos=C3=A9=20Fonseca?= <jfonseca@vmware.com>
Date: Thu, 29 Oct 2009 20:03:51 +0000
Subject: [PATCH] mesa: Add MESA_FORMAT_Z24_X8.

---
 src/mesa/main/formats.c            | 14 ++++++++++
 src/mesa/main/formats.h            |  1 +
 src/mesa/main/texfetch.c           |  7 +++++
 src/mesa/main/texstore.c           | 41 +++++++++++++++++++++++++++++-
 src/mesa/state_tracker/st_format.c |  2 ++
 5 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index 72d043c4c39..aed313445f9 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -330,6 +330,15 @@ static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
       0, 0, 0, 24, 0,              /* Lum/Int/Index/Depth/StencilBits */
       1, 1, 4                      /* BlockWidth/Height,Bytes */
    },
+   {
+      MESA_FORMAT_Z24_X8,          /* Name */
+      "MESA_FORMAT_Z24_X8",        /* StrName */
+      GL_DEPTH_COMPONENT,          /* BaseFormat */
+      GL_UNSIGNED_INT,             /* DataType */
+      0, 0, 0, 0,                  /* Red/Green/Blue/AlphaBits */
+      0, 0, 0, 24, 0,              /* Lum/Int/Index/Depth/StencilBits */
+      1, 1, 4                      /* BlockWidth/Height,Bytes */
+   },
    {
       MESA_FORMAT_Z32,             /* Name */
       "MESA_FORMAT_Z32",           /* StrName */
@@ -1004,6 +1013,11 @@ _mesa_format_to_type_and_comps(gl_format format,
       *comps = 1;
       return;
 
+   case MESA_FORMAT_Z24_X8:
+      *datatype = GL_UNSIGNED_INT;
+      *comps = 1;
+      return;
+
    case MESA_FORMAT_Z32:
       *datatype = GL_UNSIGNED_INT;
       *comps = 1;
diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h
index 91ea023077f..fa6359f5c8a 100644
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -77,6 +77,7 @@ typedef enum
    MESA_FORMAT_S8_Z24,          /* SSSS SSSS ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ */
    MESA_FORMAT_Z16,             /*                     ZZZZ ZZZZ ZZZZ ZZZZ */
    MESA_FORMAT_X8_Z24,          /* xxxx xxxx ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ */
+   MESA_FORMAT_Z24_X8,          /* ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ xxxx xxxx */
    MESA_FORMAT_Z32,             /* ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ */
    MESA_FORMAT_S8,              /*                               SSSS SSSS */
    /*@}*/
diff --git a/src/mesa/main/texfetch.c b/src/mesa/main/texfetch.c
index e6e28aef196..314ccb7b65f 100644
--- a/src/mesa/main/texfetch.c
+++ b/src/mesa/main/texfetch.c
@@ -529,6 +529,13 @@ texfetch_funcs[MESA_FORMAT_COUNT] =
       fetch_texel_3d_f_s8_z24,
       store_texel_s8_z24
    },
+   {
+      MESA_FORMAT_Z24_X8,
+      fetch_texel_1d_f_z24_s8,
+      fetch_texel_2d_f_z24_s8,
+      fetch_texel_3d_f_z24_s8,
+      store_texel_z24_s8
+   },
    {
       MESA_FORMAT_Z32,
       fetch_texel_1d_f_z32,
diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index 6237511e9f9..14cad6b32fe 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -1077,6 +1077,44 @@ _mesa_texstore_x8_z24(TEXSTORE_PARAMS)
 }
 
 
+/**
+ * Store a 24-bit integer depth component texture image.
+ */
+static GLboolean
+_mesa_texstore_z24_x8(TEXSTORE_PARAMS)
+{
+   const GLuint depthScale = 0xffffff;
+   const GLuint texelBytes = 4;
+
+   (void) dims;
+   ASSERT(dstFormat == MESA_FORMAT_Z24_X8);
+
+   {
+      /* general path */
+      GLint img, row;
+      for (img = 0; img < srcDepth; img++) {
+         GLubyte *dstRow = (GLubyte *) dstAddr
+            + dstImageOffsets[dstZoffset + img] * texelBytes
+            + dstYoffset * dstRowStride
+            + dstXoffset * texelBytes;
+         for (row = 0; row < srcHeight; row++) {
+            const GLvoid *src = _mesa_image_address(dims, srcPacking,
+                srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
+            GLuint *dst = (GLuint *) dstRow;
+            GLint i;
+            _mesa_unpack_depth_span(ctx, srcWidth,
+                                    GL_UNSIGNED_INT, dst,
+                                    depthScale, srcType, src, srcPacking);
+            for (i = 0; i < srcWidth; i++)
+               dst[i] <<= 8;
+            dstRow += dstRowStride;
+         }
+      }
+   }
+   return GL_TRUE;
+}
+
+
 /**
  * Store a 16-bit integer depth component texture image.
  */
@@ -3012,7 +3050,7 @@ _mesa_texstore_sla8(TEXSTORE_PARAMS)
  * Table mapping MESA_FORMAT_8 to _mesa_texstore_*()
  * XXX this is somewhat temporary.
  */
-static struct {
+const static struct {
    gl_format Name;
    StoreTexImageFunc Store;
 }
@@ -3046,6 +3084,7 @@ texstore_funcs[MESA_FORMAT_COUNT] =
    { MESA_FORMAT_S8_Z24, _mesa_texstore_s8_z24 },
    { MESA_FORMAT_Z16, _mesa_texstore_z16 },
    { MESA_FORMAT_X8_Z24, _mesa_texstore_x8_z24 },
+   { MESA_FORMAT_Z24_X8, _mesa_texstore_z24_x8 },
    { MESA_FORMAT_Z32, _mesa_texstore_z32 },
    { MESA_FORMAT_S8, NULL/*_mesa_texstore_s8*/ },
    { MESA_FORMAT_SRGB8, _mesa_texstore_srgb8 },
diff --git a/src/mesa/state_tracker/st_format.c b/src/mesa/state_tracker/st_format.c
index bb57adbf32a..02f80057c29 100644
--- a/src/mesa/state_tracker/st_format.c
+++ b/src/mesa/state_tracker/st_format.c
@@ -309,6 +309,8 @@ st_pipe_format_to_mesa_format(enum pipe_format pipeFormat)
       return MESA_FORMAT_Z16;
    case PIPE_FORMAT_Z32_UNORM:
       return MESA_FORMAT_Z32;
+   case PIPE_FORMAT_Z24X8_UNORM:
+      return MESA_FORMAT_Z24_X8;
    case PIPE_FORMAT_Z24S8_UNORM:
       return MESA_FORMAT_Z24_S8;
    case PIPE_FORMAT_X8Z24_UNORM:
-- 
2.30.2