mesa: implement EXT_packed_float

Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index 39f59e3cbd9..d694ab8e5ad 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -71,6 +71,7 @@
 #include "texstore.h"
 #include "enums.h"
 #include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
+#include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
 
 
 enum {
@@ -4232,6 +4233,61 @@ _mesa_texstore_rgb9_e5(TEXSTORE_PARAMS)
    return GL_TRUE;
 }
 
+static GLboolean
+_mesa_texstore_r11_g11_b10f(TEXSTORE_PARAMS)
+{
+   const GLenum baseFormat = _mesa_get_format_base_format(dstFormat);
+
+   ASSERT(dstFormat == MESA_FORMAT_R11_G11_B10_FLOAT);
+   ASSERT(baseInternalFormat == GL_RGB);
+
+   if (!ctx->_ImageTransferState &&
+       !srcPacking->SwapBytes &&
+       srcFormat == GL_RGB &&
+       srcType == GL_UNSIGNED_INT_10F_11F_11F_REV) {
+      /* simple memcpy path */
+      memcpy_texture(ctx, dims,
+                     dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
+                     dstRowStride,
+                     dstImageOffsets,
+                     srcWidth, srcHeight, srcDepth, srcFormat, srcType,
+                     srcAddr, srcPacking);
+   }
+   else {
+      /* general path */
+      const GLfloat *tempImage = _mesa_make_temp_float_image(ctx, dims,
+                                                 baseInternalFormat,
+                                                 baseFormat,
+                                                 srcWidth, srcHeight, srcDepth,
+                                                 srcFormat, srcType, srcAddr,
+                                                 srcPacking,
+                                                 ctx->_ImageTransferState);
+      const GLfloat *srcRow = tempImage;
+      GLint bytesPerRow;
+      GLint img, row, col;
+      if (!tempImage)
+         return GL_FALSE;
+      bytesPerRow = srcWidth * 3 * sizeof(GLfloat);
+      for (img = 0; img < srcDepth; img++) {
+         GLubyte *dstRow = (GLubyte *) dstAddr
+            + dstImageOffsets[dstZoffset + img] * 4
+            + dstYoffset * dstRowStride
+            + dstXoffset * 4;
+         for (row = 0; row < srcHeight; row++) {
+            GLuint *dstUI = (GLuint*)dstRow;
+            for (col = 0; col < srcWidth; col++) {
+               dstUI[col] = float3_to_r11g11b10f(&srcRow[col * 3]);
+            }
+            dstRow += dstRowStride;
+            srcRow += srcWidth * 3;
+         }
+      }
+
+      free((void *) tempImage);
+   }
+   return GL_TRUE;
+}
+
 
 
 /**
@@ -4366,6 +4422,7 @@ texstore_funcs[MESA_FORMAT_COUNT] =
    { MESA_FORMAT_SIGNED_I16, _mesa_texstore_snorm16 },
 
    { MESA_FORMAT_RGB9_E5_FLOAT, _mesa_texstore_rgb9_e5 },
+   { MESA_FORMAT_R11_G11_B10_FLOAT, _mesa_texstore_r11_g11_b10f },
 };