ARB_texture_rg: Refactor _mesa_texstore_rg88 and _mesa_texstore_al88texture_rg-2

Create a new function _mesa_texstore_unorm88 that implements both
_mesa_texstore_rg88 and _mesa_texstore_al88.

1 files changed, 44 insertions, 125 deletions

diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index 5ff1810e20..5f892c4256 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -316,6 +316,8 @@ make_temp_float_image(GLcontext *ctx, GLuint dims,
 
    ASSERT(logicalBaseFormat == GL_RGBA ||
           logicalBaseFormat == GL_RGB ||
+          logicalBaseFormat == GL_RG ||
+          logicalBaseFormat == GL_RED ||
           logicalBaseFormat == GL_LUMINANCE_ALPHA ||
           logicalBaseFormat == GL_LUMINANCE ||
           logicalBaseFormat == GL_ALPHA ||
@@ -325,6 +327,8 @@ make_temp_float_image(GLcontext *ctx, GLuint dims,
 
    ASSERT(textureBaseFormat == GL_RGBA ||
           textureBaseFormat == GL_RGB ||
+          textureBaseFormat == GL_RG ||
+          textureBaseFormat == GL_RED ||
           textureBaseFormat == GL_LUMINANCE_ALPHA ||
           textureBaseFormat == GL_LUMINANCE ||
           textureBaseFormat == GL_ALPHA ||
@@ -2047,124 +2051,23 @@ _mesa_texstore_argb1555(TEXSTORE_PARAMS)
 
 
 static GLboolean
-_mesa_texstore_rg88(TEXSTORE_PARAMS)
+_mesa_texstore_unorm88(TEXSTORE_PARAMS)
 {
    const GLboolean littleEndian = _mesa_little_endian();
    const GLuint texelBytes = _mesa_get_format_bytes(dstFormat);
    const GLenum baseFormat = _mesa_get_format_base_format(dstFormat);
 
-   ASSERT(dstFormat == MESA_FORMAT_RG88 ||
+   ASSERT(dstFormat == MESA_FORMAT_AL88 ||
+          dstFormat == MESA_FORMAT_AL88_REV ||
+          dstFormat == MESA_FORMAT_RG88 ||
           dstFormat == MESA_FORMAT_RG88_REV);
-   ASSERT(texelBytes == 2);
-
-   if (!ctx->_ImageTransferState &&
-       !srcPacking->SwapBytes &&
-       dstFormat == MESA_FORMAT_RG88 &&
-       baseInternalFormat == GL_RG &&
-       srcFormat == GL_RG &&
-       srcType == GL_UNSIGNED_BYTE &&
-       littleEndian) {
-      /* simple memcpy path */
-      memcpy_texture(ctx, dims,
-                     dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
-                     dstRowStride,
-                     dstImageOffsets,
-                     srcWidth, srcHeight, srcDepth, srcFormat, srcType,
-                     srcAddr, srcPacking);
-   }
-   else if (!ctx->_ImageTransferState &&
-	    littleEndian &&
-	    srcType == GL_UNSIGNED_BYTE &&
-	    can_swizzle(baseInternalFormat) &&
-	    can_swizzle(srcFormat)) {
 
-      GLubyte dstmap[4];
-
-      /* dstmap - how to swizzle from RGBA to dst format:
-       */
-      if ((littleEndian && dstFormat == MESA_FORMAT_RG88) ||
-	  (!littleEndian && dstFormat == MESA_FORMAT_RG88_REV)) {
-	 dstmap[0] = 0;
-	 dstmap[1] = 1;
-      }
-      else {
-	 dstmap[0] = 1;
-	 dstmap[1] = 0;
-      }
-      dstmap[2] = ZERO;		/* ? */
-      dstmap[3] = ONE;		/* ? */
-
-      _mesa_swizzle_ubyte_image(ctx, dims,
-				srcFormat,
-				srcType,
-				baseInternalFormat,
-				dstmap, 2,
-				dstAddr, dstXoffset, dstYoffset, dstZoffset,
-				dstRowStride, dstImageOffsets,
-				srcWidth, srcHeight, srcDepth, srcAddr,
-				srcPacking);
-   }
-   else {
-      /* general path */
-      const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
-                                                 baseInternalFormat,
-                                                 baseFormat,
-                                                 srcWidth, srcHeight, srcDepth,
-                                                 srcFormat, srcType, srcAddr,
-                                                 srcPacking);
-      const GLchan *src = tempImage;
-      GLint img, row, col;
-      if (!tempImage)
-         return GL_FALSE;
-      _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
-      for (img = 0; img < srcDepth; img++) {
-         GLubyte *dstRow = (GLubyte *) dstAddr
-            + dstImageOffsets[dstZoffset + img] * texelBytes
-            + dstYoffset * dstRowStride
-            + dstXoffset * texelBytes;
-         for (row = 0; row < srcHeight; row++) {
-            GLushort *dstUS = (GLushort *) dstRow;
-            if (dstFormat == MESA_FORMAT_RG88) {
-               for (col = 0; col < srcWidth; col++) {
-                  /* src[0] is luminance, src[1] is alpha */
-                 dstUS[col] = PACK_COLOR_88( CHAN_TO_UBYTE(src[1]),
-                                             CHAN_TO_UBYTE(src[0]) );
-                 src += 2;
-               }
-            }
-            else {
-               for (col = 0; col < srcWidth; col++) {
-                  /* src[0] is luminance, src[1] is alpha */
-                 dstUS[col] = PACK_COLOR_88_REV( CHAN_TO_UBYTE(src[1]),
-                                                 CHAN_TO_UBYTE(src[0]) );
-                 src += 2;
-               }
-            }
-            dstRow += dstRowStride;
-         }
-      }
-      _mesa_free((void *) tempImage);
-   }
-   return GL_TRUE;
-}
-
-
-static GLboolean
-_mesa_texstore_al88(TEXSTORE_PARAMS)
-{
-   const GLboolean littleEndian = _mesa_little_endian();
-   const GLuint texelBytes = _mesa_get_format_bytes(dstFormat);
-   const GLenum baseFormat = _mesa_get_format_base_format(dstFormat);
-
-   ASSERT(dstFormat == MESA_FORMAT_AL88 ||
-          dstFormat == MESA_FORMAT_AL88_REV);
    ASSERT(texelBytes == 2);
 
    if (!ctx->_ImageTransferState &&
        !srcPacking->SwapBytes &&
-       dstFormat == MESA_FORMAT_AL88 &&
-       baseInternalFormat == GL_LUMINANCE_ALPHA &&
-       srcFormat == GL_LUMINANCE_ALPHA &&
+       baseInternalFormat == srcFormat &&
+       (dstFormat == MESA_FORMAT_AL88 || dstFormat == MESA_FORMAT_RG88) &&
        srcType == GL_UNSIGNED_BYTE &&
        littleEndian) {
       /* simple memcpy path */
@@ -2185,15 +2088,30 @@ _mesa_texstore_al88(TEXSTORE_PARAMS)
 
       /* dstmap - how to swizzle from RGBA to dst format:
        */
-      if ((littleEndian && dstFormat == MESA_FORMAT_AL88) ||
-	  (!littleEndian && dstFormat == MESA_FORMAT_AL88_REV)) {
-	 dstmap[0] = 0;
-	 dstmap[1] = 3;
+      if ((dstFormat == MESA_FORMAT_AL88) ||
+	  (dstFormat == MESA_FORMAT_AL88_REV)) {
+	 if ((littleEndian && dstFormat == MESA_FORMAT_AL88) ||
+	     (!littleEndian && dstFormat == MESA_FORMAT_AL88_REV)) {
+	    dstmap[0] = 0;
+	    dstmap[1] = 3;
+	 }
+	 else {
+	    dstmap[0] = 3;
+	    dstmap[1] = 0;
+	 }
       }
       else {
-	 dstmap[0] = 3;
-	 dstmap[1] = 0;
+	 if ((littleEndian && dstFormat == MESA_FORMAT_RG88) ||
+	     (!littleEndian && dstFormat == MESA_FORMAT_RG88_REV)) {
+	    dstmap[0] = 0;
+	    dstmap[1] = 1;
+	 }
+	 else {
+	    dstmap[0] = 1;
+	    dstmap[1] = 0;
+	 }
       }
+
       dstmap[2] = ZERO;		/* ? */
       dstmap[3] = ONE;		/* ? */
       
@@ -2227,7 +2145,8 @@ _mesa_texstore_al88(TEXSTORE_PARAMS)
             + dstXoffset * texelBytes;
          for (row = 0; row < srcHeight; row++) {
             GLushort *dstUS = (GLushort *) dstRow;
-            if (dstFormat == MESA_FORMAT_AL88) {
+            if ((dstFormat == MESA_FORMAT_AL88) ||
+		(dstFormat == MESA_FORMAT_RG88)) {
                for (col = 0; col < srcWidth; col++) {
                   /* src[0] is luminance, src[1] is alpha */
                  dstUS[col] = PACK_COLOR_88( CHAN_TO_UBYTE(src[1]),
@@ -3201,13 +3120,13 @@ _mesa_texstore_sla8(TEXSTORE_PARAMS)
    /* reuse normal luminance/alpha texstore code */
    newDstFormat = MESA_FORMAT_AL88;
 
-   k = _mesa_texstore_al88(ctx, dims, baseInternalFormat,
-                           newDstFormat, dstAddr,
-                           dstXoffset, dstYoffset, dstZoffset,
-                           dstRowStride, dstImageOffsets,
-                           srcWidth, srcHeight, srcDepth,
-                           srcFormat, srcType,
-                           srcAddr, srcPacking);
+   k = _mesa_texstore_unorm88(ctx, dims, baseInternalFormat,
+			      newDstFormat, dstAddr,
+			      dstXoffset, dstYoffset, dstZoffset,
+			      dstRowStride, dstImageOffsets,
+			      srcWidth, srcHeight, srcDepth,
+			      srcFormat, srcType,
+			      srcAddr, srcPacking);
    return k;
 }
 
@@ -3251,11 +3170,11 @@ texstore_funcs[MESA_FORMAT_COUNT] =
    { MESA_FORMAT_RGBA5551, _mesa_texstore_rgba5551 },
    { MESA_FORMAT_ARGB1555, _mesa_texstore_argb1555 },
    { MESA_FORMAT_ARGB1555_REV, _mesa_texstore_argb1555 },
-   { MESA_FORMAT_RG88, _mesa_texstore_rg88 },
-   { MESA_FORMAT_RG88_REV, _mesa_texstore_rg88 },
+   { MESA_FORMAT_RG88, _mesa_texstore_unorm88 },
+   { MESA_FORMAT_RG88_REV, _mesa_texstore_unorm88 },
    { MESA_FORMAT_R8, _mesa_texstore_a8 },
-   { MESA_FORMAT_AL88, _mesa_texstore_al88 },
-   { MESA_FORMAT_AL88_REV, _mesa_texstore_al88 },
+   { MESA_FORMAT_AL88, _mesa_texstore_unorm88 },
+   { MESA_FORMAT_AL88_REV, _mesa_texstore_unorm88 },
    { MESA_FORMAT_AL1616, _mesa_texstore_al1616 },
    { MESA_FORMAT_AL1616_REV, _mesa_texstore_al1616 },
    { MESA_FORMAT_RGB332, _mesa_texstore_rgb332 },