mesa: initial support for unnormalized integer texture formats

As defined by GL_EXT_texture_integer.

1 files changed, 321 insertions, 130 deletions

diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index 93b01423dc..63c28342f2 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -274,17 +274,25 @@ _mesa_components_in_format( GLenum format )
       case GL_STENCIL_INDEX:
       case GL_DEPTH_COMPONENT:
       case GL_RED:
+      case GL_RED_INTEGER_EXT:
       case GL_GREEN:
+      case GL_GREEN_INTEGER_EXT:
       case GL_BLUE:
+      case GL_BLUE_INTEGER_EXT:
       case GL_ALPHA:
+      case GL_ALPHA_INTEGER_EXT:
       case GL_LUMINANCE:
+      case GL_LUMINANCE_INTEGER_EXT:
       case GL_INTENSITY:
          return 1;
       case GL_LUMINANCE_ALPHA:
+      case GL_LUMINANCE_ALPHA_INTEGER_EXT:
 	 return 2;
       case GL_RGB:
+      case GL_RGB_INTEGER_EXT:
 	 return 3;
       case GL_RGBA:
+      case GL_RGBA_INTEGER_EXT:
 	 return 4;
       case GL_BGR:
 	 return 3;
@@ -523,6 +531,28 @@ _mesa_is_legal_format_and_type( GLcontext *ctx, GLenum format, GLenum type )
             default:
                return GL_FALSE;
          }
+      case GL_RED_INTEGER_EXT:
+      case GL_GREEN_INTEGER_EXT:
+      case GL_BLUE_INTEGER_EXT:
+      case GL_ALPHA_INTEGER_EXT:
+      case GL_RGB_INTEGER_EXT:
+      case GL_RGBA_INTEGER_EXT:
+      case GL_BGR_INTEGER_EXT:
+      case GL_BGRA_INTEGER_EXT:
+      case GL_LUMINANCE_INTEGER_EXT:
+      case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+         switch (type) {
+            case GL_BYTE:
+            case GL_UNSIGNED_BYTE:
+            case GL_SHORT:
+            case GL_UNSIGNED_SHORT:
+            case GL_INT:
+            case GL_UNSIGNED_INT:
+               return ctx->Extensions.EXT_texture_integer;
+            default:
+               return GL_FALSE;
+         }
+
       default:
          ; /* fall-through */
    }
@@ -777,6 +807,30 @@ _mesa_is_dudv_format(GLenum format)
 
 
 /**
+ * Test if the given format is an integer (non-normalized) format.
+ */
+GLboolean
+_mesa_is_integer_format(GLenum format)
+{
+   switch (format) {
+   case GL_RED_INTEGER_EXT:
+   case GL_GREEN_INTEGER_EXT:
+   case GL_BLUE_INTEGER_EXT:
+   case GL_ALPHA_INTEGER_EXT:
+   case GL_RGB_INTEGER_EXT:
+   case GL_RGBA_INTEGER_EXT:
+   case GL_BGR_INTEGER_EXT:
+   case GL_BGRA_INTEGER_EXT:
+   case GL_LUMINANCE_INTEGER_EXT:
+   case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
  * Test if an image format is a supported compressed format.
  * \param format the internal format token provided by the user.
  * \return GL_TRUE if compressed, GL_FALSE if uncompressed
@@ -3275,6 +3329,8 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
    GLint redIndex, greenIndex, blueIndex, alphaIndex;
    GLint stride;
    GLint rComp, bComp, gComp, aComp;
+   GLboolean intFormat;
+   GLfloat rs = 1.0f, gs = 1.0f, bs = 1.0f, as = 1.0f; /* scale factors */
 
    ASSERT(srcFormat == GL_RED ||
           srcFormat == GL_GREEN ||
@@ -3289,7 +3345,17 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
           srcFormat == GL_BGRA ||
           srcFormat == GL_ABGR_EXT ||
           srcFormat == GL_DU8DV8_ATI ||
-          srcFormat == GL_DUDV_ATI);
+          srcFormat == GL_DUDV_ATI ||
+          srcFormat == GL_RED_INTEGER_EXT ||
+          srcFormat == GL_GREEN_INTEGER_EXT ||
+          srcFormat == GL_BLUE_INTEGER_EXT ||
+          srcFormat == GL_ALPHA_INTEGER_EXT ||
+          srcFormat == GL_RGB_INTEGER_EXT ||
+          srcFormat == GL_RGBA_INTEGER_EXT ||
+          srcFormat == GL_BGR_INTEGER_EXT ||
+          srcFormat == GL_BGRA_INTEGER_EXT ||
+          srcFormat == GL_LUMINANCE_INTEGER_EXT ||
+          srcFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT);
 
    ASSERT(srcType == GL_UNSIGNED_BYTE ||
           srcType == GL_BYTE ||
@@ -3316,31 +3382,37 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
 
    switch (srcFormat) {
       case GL_RED:
+      case GL_RED_INTEGER_EXT:
          redIndex = 0;
          greenIndex = blueIndex = alphaIndex = -1;
          stride = 1;
          break;
       case GL_GREEN:
+      case GL_GREEN_INTEGER_EXT:
          greenIndex = 0;
          redIndex = blueIndex = alphaIndex = -1;
          stride = 1;
          break;
       case GL_BLUE:
+      case GL_BLUE_INTEGER_EXT:
          blueIndex = 0;
          redIndex = greenIndex = alphaIndex = -1;
          stride = 1;
          break;
       case GL_ALPHA:
+      case GL_ALPHA_INTEGER_EXT:
          redIndex = greenIndex = blueIndex = -1;
          alphaIndex = 0;
          stride = 1;
          break;
       case GL_LUMINANCE:
+      case GL_LUMINANCE_INTEGER_EXT:
          redIndex = greenIndex = blueIndex = 0;
          alphaIndex = -1;
          stride = 1;
          break;
       case GL_LUMINANCE_ALPHA:
+      case GL_LUMINANCE_ALPHA_INTEGER_EXT:
          redIndex = greenIndex = blueIndex = 0;
          alphaIndex = 1;
          stride = 2;
@@ -3350,6 +3422,7 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
          stride = 1;
          break;
       case GL_RGB:
+      case GL_RGB_INTEGER:
          redIndex = 0;
          greenIndex = 1;
          blueIndex = 2;
@@ -3372,6 +3445,7 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
          stride = 3;
          break;
       case GL_RGBA:
+      case GL_RGBA_INTEGER:
          redIndex = 0;
          greenIndex = 1;
          blueIndex = 2;
@@ -3418,12 +3492,20 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
          return;
    }
 
+   intFormat = _mesa_is_integer_format(srcFormat);
 
-#define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION)		\
+#define PROCESS(INDEX, CHANNEL, DEFAULT, DEFAULT_INT, TYPE, CONVERSION) \
    if ((INDEX) < 0) {							\
       GLuint i;								\
-      for (i = 0; i < n; i++) {						\
-         rgba[i][CHANNEL] = DEFAULT;					\
+      if (intFormat) {							\
+         for (i = 0; i < n; i++) {					\
+            rgba[i][CHANNEL] = DEFAULT_INT;				\
+         }								\
+      }									\
+      else {								\
+         for (i = 0; i < n; i++) {					\
+            rgba[i][CHANNEL] = DEFAULT;					\
+         }								\
       }									\
    }									\
    else if (swapBytes) {						\
@@ -3437,77 +3519,93 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
          else if (sizeof(TYPE) == 4) {					\
             SWAP4BYTE(value);						\
          }								\
-         rgba[i][CHANNEL] = (GLfloat) CONVERSION(value);		\
+         if (intFormat)							\
+            rgba[i][CHANNEL] = (GLfloat) value;				\
+         else								\
+            rgba[i][CHANNEL] = (GLfloat) CONVERSION(value);		\
          s += stride;							\
       }									\
    }									\
    else {								\
       const TYPE *s = (const TYPE *) src;				\
       GLuint i;								\
-      for (i = 0; i < n; i++) {						\
-         rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]);		\
-         s += stride;							\
+      if (intFormat) {							\
+         for (i = 0; i < n; i++) {					\
+            rgba[i][CHANNEL] = (GLfloat) s[INDEX];			\
+            s += stride;						\
+         }								\
+      }									\
+      else {								\
+         for (i = 0; i < n; i++) {					\
+            rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]);		\
+            s += stride;						\
+         }								\
       }									\
    }
 
    switch (srcType) {
       case GL_UNSIGNED_BYTE:
-         PROCESS(redIndex,   RCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, GLubyte, UBYTE_TO_FLOAT);
+         PROCESS(redIndex,   RCOMP, 0.0F,   0, GLubyte, UBYTE_TO_FLOAT);
+         PROCESS(greenIndex, GCOMP, 0.0F,   0, GLubyte, UBYTE_TO_FLOAT);
+         PROCESS(blueIndex,  BCOMP, 0.0F,   0, GLubyte, UBYTE_TO_FLOAT);
+         PROCESS(alphaIndex, ACOMP, 1.0F, 255, GLubyte, UBYTE_TO_FLOAT);
          break;
       case GL_BYTE:
-         PROCESS(redIndex,   RCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, GLbyte, BYTE_TO_FLOAT);
+         PROCESS(redIndex,   RCOMP, 0.0F,   0, GLbyte, BYTE_TO_FLOAT);
+         PROCESS(greenIndex, GCOMP, 0.0F,   0, GLbyte, BYTE_TO_FLOAT);
+         PROCESS(blueIndex,  BCOMP, 0.0F,   0, GLbyte, BYTE_TO_FLOAT);
+         PROCESS(alphaIndex, ACOMP, 1.0F, 127, GLbyte, BYTE_TO_FLOAT);
          break;
       case GL_UNSIGNED_SHORT:
-         PROCESS(redIndex,   RCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, GLushort, USHORT_TO_FLOAT);
+         PROCESS(redIndex,   RCOMP, 0.0F,      0, GLushort, USHORT_TO_FLOAT);
+         PROCESS(greenIndex, GCOMP, 0.0F,      0, GLushort, USHORT_TO_FLOAT);
+         PROCESS(blueIndex,  BCOMP, 0.0F,      0, GLushort, USHORT_TO_FLOAT);
+         PROCESS(alphaIndex, ACOMP, 1.0F, 0xffff, GLushort, USHORT_TO_FLOAT);
          break;
       case GL_SHORT:
-         PROCESS(redIndex,   RCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, GLshort, SHORT_TO_FLOAT);
+         PROCESS(redIndex,   RCOMP, 0.0F,     0, GLshort, SHORT_TO_FLOAT);
+         PROCESS(greenIndex, GCOMP, 0.0F,     0, GLshort, SHORT_TO_FLOAT);
+         PROCESS(blueIndex,  BCOMP, 0.0F,     0, GLshort, SHORT_TO_FLOAT);
+         PROCESS(alphaIndex, ACOMP, 1.0F, 32767, GLshort, SHORT_TO_FLOAT);
          break;
       case GL_UNSIGNED_INT:
-         PROCESS(redIndex,   RCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, GLuint, UINT_TO_FLOAT);
+         PROCESS(redIndex,   RCOMP, 0.0F,          0, GLuint, UINT_TO_FLOAT);
+         PROCESS(greenIndex, GCOMP, 0.0F,          0, GLuint, UINT_TO_FLOAT);
+         PROCESS(blueIndex,  BCOMP, 0.0F,          0, GLuint, UINT_TO_FLOAT);
+         PROCESS(alphaIndex, ACOMP, 1.0F, 0xffffffff, GLuint, UINT_TO_FLOAT);
          break;
       case GL_INT:
-         PROCESS(redIndex,   RCOMP, 0.0F, GLint, INT_TO_FLOAT);
-         PROCESS(greenIndex, GCOMP, 0.0F, GLint, INT_TO_FLOAT);
-         PROCESS(blueIndex,  BCOMP, 0.0F, GLint, INT_TO_FLOAT);
-         PROCESS(alphaIndex, ACOMP, 1.0F, GLint, INT_TO_FLOAT);
+         PROCESS(redIndex,   RCOMP, 0.0F,          0, GLint, INT_TO_FLOAT);
+         PROCESS(greenIndex, GCOMP, 0.0F,          0, GLint, INT_TO_FLOAT);
+         PROCESS(blueIndex,  BCOMP, 0.0F,          0, GLint, INT_TO_FLOAT);
+         PROCESS(alphaIndex, ACOMP, 1.0F, 2147483647, GLint, INT_TO_FLOAT);
          break;
       case GL_FLOAT:
-         PROCESS(redIndex,   RCOMP, 0.0F, GLfloat, (GLfloat));
-         PROCESS(greenIndex, GCOMP, 0.0F, GLfloat, (GLfloat));
-         PROCESS(blueIndex,  BCOMP, 0.0F, GLfloat, (GLfloat));
-         PROCESS(alphaIndex, ACOMP, 1.0F, GLfloat, (GLfloat));
+         PROCESS(redIndex,   RCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
+         PROCESS(greenIndex, GCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
+         PROCESS(blueIndex,  BCOMP, 0.0F, 0.0F, GLfloat, (GLfloat));
+         PROCESS(alphaIndex, ACOMP, 1.0F, 1.0F, GLfloat, (GLfloat));
          break;
       case GL_HALF_FLOAT_ARB:
-         PROCESS(redIndex,   RCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
-         PROCESS(greenIndex, GCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
-         PROCESS(blueIndex,  BCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
-         PROCESS(alphaIndex, ACOMP, 1.0F, GLhalfARB, _mesa_half_to_float);
+         PROCESS(redIndex,   RCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
+         PROCESS(greenIndex, GCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
+         PROCESS(blueIndex,  BCOMP, 0.0F, 0.0F, GLhalfARB, _mesa_half_to_float);
+         PROCESS(alphaIndex, ACOMP, 1.0F, 1.0F, GLhalfARB, _mesa_half_to_float);
          break;
       case GL_UNSIGNED_BYTE_3_3_2:
          {
             const GLubyte *ubsrc = (const GLubyte *) src;
             GLuint i;
+            if (!intFormat) {
+               rs = 1.0F / 7.0F;
+               gs = 1.0F / 7.0F;
+               bs = 1.0F / 3.0F;
+            }
             for (i = 0; i < n; i ++) {
                GLubyte p = ubsrc[i];
-               rgba[i][rComp] = ((p >> 5)      ) * (1.0F / 7.0F);
-               rgba[i][gComp] = ((p >> 2) & 0x7) * (1.0F / 7.0F);
-               rgba[i][bComp] = ((p     ) & 0x3) * (1.0F / 3.0F);
+               rgba[i][rComp] = ((p >> 5)      ) * rs;
+               rgba[i][gComp] = ((p >> 2) & 0x7) * gs;
+               rgba[i][bComp] = ((p     ) & 0x3) * bs;
                rgba[i][aComp] = 1.0F;
             }
          }
@@ -3516,25 +3614,35 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
          {
             const GLubyte *ubsrc = (const GLubyte *) src;
             GLuint i;
+            if (!intFormat) {
+               rs = 1.0F / 7.0F;
+               gs = 1.0F / 7.0F;
+               bs = 1.0F / 3.0F;
+            }
             for (i = 0; i < n; i ++) {
                GLubyte p = ubsrc[i];
-               rgba[i][rComp] = ((p     ) & 0x7) * (1.0F / 7.0F);
-               rgba[i][gComp] = ((p >> 3) & 0x7) * (1.0F / 7.0F);
-               rgba[i][bComp] = ((p >> 6)      ) * (1.0F / 3.0F);
+               rgba[i][rComp] = ((p     ) & 0x7) * rs;
+               rgba[i][gComp] = ((p >> 3) & 0x7) * gs;
+               rgba[i][bComp] = ((p >> 6)      ) * bs;
                rgba[i][aComp] = 1.0F;
             }
          }
          break;
       case GL_UNSIGNED_SHORT_5_6_5:
+         if (!intFormat) {
+            rs = 1.0F / 31.0F;
+            gs = 1.0F / 63.0F;
+            bs = 1.0F / 31.0F;
+         }
          if (swapBytes) {
             const GLushort *ussrc = (const GLushort *) src;
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
                SWAP2BYTE(p);
-               rgba[i][rComp] = ((p >> 11)       ) * (1.0F / 31.0F);
-               rgba[i][gComp] = ((p >>  5) & 0x3f) * (1.0F / 63.0F);
-               rgba[i][bComp] = ((p      ) & 0x1f) * (1.0F / 31.0F);
+               rgba[i][rComp] = ((p >> 11)       ) * rs;
+               rgba[i][gComp] = ((p >>  5) & 0x3f) * gs;
+               rgba[i][bComp] = ((p      ) & 0x1f) * bs;
                rgba[i][aComp] = 1.0F;
             }
          }
@@ -3543,23 +3651,28 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p >> 11)       ) * (1.0F / 31.0F);
-               rgba[i][gComp] = ((p >>  5) & 0x3f) * (1.0F / 63.0F);
-               rgba[i][bComp] = ((p      ) & 0x1f) * (1.0F / 31.0F);
+               rgba[i][rComp] = ((p >> 11)       ) * rs;
+               rgba[i][gComp] = ((p >>  5) & 0x3f) * gs;
+               rgba[i][bComp] = ((p      ) & 0x1f) * bs;
                rgba[i][aComp] = 1.0F;
             }
          }
          break;
       case GL_UNSIGNED_SHORT_5_6_5_REV:
+         if (!intFormat) {
+            rs = 1.0F / 31.0F;
+            gs = 1.0F / 63.0F;
+            bs = 1.0F / 31.0F;
+         }
          if (swapBytes) {
             const GLushort *ussrc = (const GLushort *) src;
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
                SWAP2BYTE(p);
-               rgba[i][rComp] = ((p      ) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][gComp] = ((p >>  5) & 0x3f) * (1.0F / 63.0F);
-               rgba[i][bComp] = ((p >> 11)       ) * (1.0F / 31.0F);
+               rgba[i][rComp] = ((p      ) & 0x1f) * rs;
+               rgba[i][gComp] = ((p >>  5) & 0x3f) * gs;
+               rgba[i][bComp] = ((p >> 11)       ) * bs;
                rgba[i][aComp] = 1.0F;
             }
          }
@@ -3568,24 +3681,27 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p      ) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][gComp] = ((p >>  5) & 0x3f) * (1.0F / 63.0F);
-               rgba[i][bComp] = ((p >> 11)       ) * (1.0F / 31.0F);
+               rgba[i][rComp] = ((p      ) & 0x1f) * rs;
+               rgba[i][gComp] = ((p >>  5) & 0x3f) * gs;
+               rgba[i][bComp] = ((p >> 11)       ) * bs;
                rgba[i][aComp] = 1.0F;
             }
          }
          break;
       case GL_UNSIGNED_SHORT_4_4_4_4:
+         if (!intFormat) {
+            rs = gs = bs = as = 1.0F / 15.0F;
+         }
          if (swapBytes) {
             const GLushort *ussrc = (const GLushort *) src;
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
                SWAP2BYTE(p);
-               rgba[i][rComp] = ((p >> 12)      ) * (1.0F / 15.0F);
-               rgba[i][gComp] = ((p >>  8) & 0xf) * (1.0F / 15.0F);
-               rgba[i][bComp] = ((p >>  4) & 0xf) * (1.0F / 15.0F);
-               rgba[i][aComp] = ((p      ) & 0xf) * (1.0F / 15.0F);
+               rgba[i][rComp] = ((p >> 12)      ) * rs;
+               rgba[i][gComp] = ((p >>  8) & 0xf) * gs;
+               rgba[i][bComp] = ((p >>  4) & 0xf) * bs;
+               rgba[i][aComp] = ((p      ) & 0xf) * as;
             }
          }
          else {
@@ -3593,24 +3709,27 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p >> 12)      ) * (1.0F / 15.0F);
-               rgba[i][gComp] = ((p >>  8) & 0xf) * (1.0F / 15.0F);
-               rgba[i][bComp] = ((p >>  4) & 0xf) * (1.0F / 15.0F);
-               rgba[i][aComp] = ((p      ) & 0xf) * (1.0F / 15.0F);
+               rgba[i][rComp] = ((p >> 12)      ) * rs;
+               rgba[i][gComp] = ((p >>  8) & 0xf) * gs;
+               rgba[i][bComp] = ((p >>  4) & 0xf) * bs;
+               rgba[i][aComp] = ((p      ) & 0xf) * as;
             }
          }
          break;
       case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+         if (!intFormat) {
+            rs = gs = bs = as = 1.0F / 15.0F;
+         }
          if (swapBytes) {
             const GLushort *ussrc = (const GLushort *) src;
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
                SWAP2BYTE(p);
-               rgba[i][rComp] = ((p      ) & 0xf) * (1.0F / 15.0F);
-               rgba[i][gComp] = ((p >>  4) & 0xf) * (1.0F / 15.0F);
-               rgba[i][bComp] = ((p >>  8) & 0xf) * (1.0F / 15.0F);
-               rgba[i][aComp] = ((p >> 12)      ) * (1.0F / 15.0F);
+               rgba[i][rComp] = ((p      ) & 0xf) * rs;
+               rgba[i][gComp] = ((p >>  4) & 0xf) * gs;
+               rgba[i][bComp] = ((p >>  8) & 0xf) * bs;
+               rgba[i][aComp] = ((p >> 12)      ) * as;
             }
          }
          else {
@@ -3618,24 +3737,27 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p      ) & 0xf) * (1.0F / 15.0F);
-               rgba[i][gComp] = ((p >>  4) & 0xf) * (1.0F / 15.0F);
-               rgba[i][bComp] = ((p >>  8) & 0xf) * (1.0F / 15.0F);
-               rgba[i][aComp] = ((p >> 12)      ) * (1.0F / 15.0F);
+               rgba[i][rComp] = ((p      ) & 0xf) * rs;
+               rgba[i][gComp] = ((p >>  4) & 0xf) * gs;
+               rgba[i][bComp] = ((p >>  8) & 0xf) * bs;
+               rgba[i][aComp] = ((p >> 12)      ) * as;
             }
          }
          break;
       case GL_UNSIGNED_SHORT_5_5_5_1:
+         if (!intFormat) {
+            rs = gs = bs = 1.0F / 31.0F;
+         }
          if (swapBytes) {
             const GLushort *ussrc = (const GLushort *) src;
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
                SWAP2BYTE(p);
-               rgba[i][rComp] = ((p >> 11)       ) * (1.0F / 31.0F);
-               rgba[i][gComp] = ((p >>  6) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][bComp] = ((p >>  1) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][aComp] = ((p      ) & 0x1)  * (1.0F /  1.0F);
+               rgba[i][rComp] = ((p >> 11)       ) * rs;
+               rgba[i][gComp] = ((p >>  6) & 0x1f) * gs;
+               rgba[i][bComp] = ((p >>  1) & 0x1f) * bs;
+               rgba[i][aComp] = ((p      ) & 0x1)  * as;
             }
          }
          else {
@@ -3643,24 +3765,27 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p >> 11)       ) * (1.0F / 31.0F);
-               rgba[i][gComp] = ((p >>  6) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][bComp] = ((p >>  1) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][aComp] = ((p      ) & 0x1)  * (1.0F /  1.0F);
+               rgba[i][rComp] = ((p >> 11)       ) * rs;
+               rgba[i][gComp] = ((p >>  6) & 0x1f) * gs;
+               rgba[i][bComp] = ((p >>  1) & 0x1f) * bs;
+               rgba[i][aComp] = ((p      ) & 0x1)  * as;
             }
          }
          break;
       case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+         if (!intFormat) {
+            rs = gs = bs = 1.0F / 31.0F;
+         }
          if (swapBytes) {
             const GLushort *ussrc = (const GLushort *) src;
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
                SWAP2BYTE(p);
-               rgba[i][rComp] = ((p      ) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][gComp] = ((p >>  5) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][aComp] = ((p >> 15)       ) * (1.0F /  1.0F);
+               rgba[i][rComp] = ((p      ) & 0x1f) * rs;
+               rgba[i][gComp] = ((p >>  5) & 0x1f) * gs;
+               rgba[i][bComp] = ((p >> 10) & 0x1f) * bs;
+               rgba[i][aComp] = ((p >> 15)       ) * as;
             }
          }
          else {
@@ -3668,10 +3793,10 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLushort p = ussrc[i];
-               rgba[i][rComp] = ((p      ) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][gComp] = ((p >>  5) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
-               rgba[i][aComp] = ((p >> 15)       ) * (1.0F /  1.0F);
+               rgba[i][rComp] = ((p      ) & 0x1f) * rs;
+               rgba[i][gComp] = ((p >>  5) & 0x1f) * gs;
+               rgba[i][bComp] = ((p >> 10) & 0x1f) * bs;
+               rgba[i][aComp] = ((p >> 15)       ) * as;
             }
          }
          break;
@@ -3679,23 +3804,45 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
          if (swapBytes) {
             const GLuint *uisrc = (const GLuint *) src;
             GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLuint p = uisrc[i];
-               rgba[i][rComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
-               rgba[i][gComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
-               rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
-               rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24)       );
+            if (intFormat) {
+               for (i = 0; i < n; i ++) {
+                  GLuint p = uisrc[i];
+                  rgba[i][rComp] = (GLfloat) ((p      ) & 0xff);
+                  rgba[i][gComp] = (GLfloat) ((p >>  8) & 0xff);
+                  rgba[i][bComp] = (GLfloat) ((p >> 16) & 0xff);
+                  rgba[i][aComp] = (GLfloat) ((p >> 24)       );
+               }
+            }
+            else {
+               for (i = 0; i < n; i ++) {
+                  GLuint p = uisrc[i];
+                  rgba[i][rComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
+                  rgba[i][gComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
+                  rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
+                  rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24)       );
+               }
             }
          }
          else {
             const GLuint *uisrc = (const GLuint *) src;
             GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLuint p = uisrc[i];
-               rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24)       );
-               rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
-               rgba[i][bComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
-               rgba[i][aComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
+            if (intFormat) {
+               for (i = 0; i < n; i ++) {
+                  GLuint p = uisrc[i];
+                  rgba[i][rComp] = (GLfloat) ((p >> 24)       );
+                  rgba[i][gComp] = (GLfloat) ((p >> 16) & 0xff);
+                  rgba[i][bComp] = (GLfloat) ((p >>  8) & 0xff);
+                  rgba[i][aComp] = (GLfloat) ((p      ) & 0xff);
+               }
+            }
+            else {
+               for (i = 0; i < n; i ++) {
+                  GLuint p = uisrc[i];
+                  rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24)       );
+                  rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
+                  rgba[i][bComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
+                  rgba[i][aComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
+               }
             }
          }
          break;
@@ -3703,37 +3850,65 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
          if (swapBytes) {
             const GLuint *uisrc = (const GLuint *) src;
             GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLuint p = uisrc[i];
-               rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24)       );
-               rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
-               rgba[i][bComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
-               rgba[i][aComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
+            if (intFormat) {
+               for (i = 0; i < n; i ++) {
+                  GLuint p = uisrc[i];
+                  rgba[i][rComp] = (GLfloat) ((p >> 24)       );
+                  rgba[i][gComp] = (GLfloat) ((p >> 16) & 0xff);
+                  rgba[i][bComp] = (GLfloat) ((p >>  8) & 0xff);
+                  rgba[i][aComp] = (GLfloat) ((p      ) & 0xff);
+               }
+            }
+            else {
+               for (i = 0; i < n; i ++) {
+                  GLuint p = uisrc[i];
+                  rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24)       );
+                  rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
+                  rgba[i][bComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
+                  rgba[i][aComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
+               }
             }
          }
          else {
             const GLuint *uisrc = (const GLuint *) src;
             GLuint i;
-            for (i = 0; i < n; i ++) {
-               GLuint p = uisrc[i];
-               rgba[i][rComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
-               rgba[i][gComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
-               rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
-               rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24)       );
+            if (intFormat) {
+               for (i = 0; i < n; i ++) {
+                  GLuint p = uisrc[i];
+                  rgba[i][rComp] = (GLfloat) ((p      ) & 0xff);
+                  rgba[i][gComp] = (GLfloat) ((p >>  8) & 0xff);
+                  rgba[i][bComp] = (GLfloat) ((p >> 16) & 0xff);
+                  rgba[i][aComp] = (GLfloat) ((p >> 24)       );
+               }
+            }
+            else {
+               for (i = 0; i < n; i ++) {
+                  GLuint p = uisrc[i];
+                  rgba[i][rComp] = UBYTE_TO_FLOAT((p      ) & 0xff);
+                  rgba[i][gComp] = UBYTE_TO_FLOAT((p >>  8) & 0xff);
+                  rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
+                  rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24)       );
+               }
             }
          }
          break;
       case GL_UNSIGNED_INT_10_10_10_2:
+         if (!intFormat) {
+            rs = 1.0F / 1023.0F;
+            gs = 1.0F / 1023.0F;
+            bs = 1.0F / 1023.0F;
+            as = 1.0F / 3.0F;
+         }
          if (swapBytes) {
             const GLuint *uisrc = (const GLuint *) src;
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLuint p = uisrc[i];
                SWAP4BYTE(p);
-               rgba[i][rComp] = ((p >> 22)        ) * (1.0F / 1023.0F);
-               rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][bComp] = ((p >>  2) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][aComp] = ((p      ) & 0x3  ) * (1.0F /    3.0F);
+               rgba[i][rComp] = ((p >> 22)        ) * rs;
+               rgba[i][gComp] = ((p >> 12) & 0x3ff) * gs;
+               rgba[i][bComp] = ((p >>  2) & 0x3ff) * bs;
+               rgba[i][aComp] = ((p      ) & 0x3  ) * as;
             }
          }
          else {
@@ -3741,24 +3916,30 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLuint p = uisrc[i];
-               rgba[i][rComp] = ((p >> 22)        ) * (1.0F / 1023.0F);
-               rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][bComp] = ((p >>  2) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][aComp] = ((p      ) & 0x3  ) * (1.0F /    3.0F);
+               rgba[i][rComp] = ((p >> 22)        ) * rs;
+               rgba[i][gComp] = ((p >> 12) & 0x3ff) * gs;
+               rgba[i][bComp] = ((p >>  2) & 0x3ff) * bs;
+               rgba[i][aComp] = ((p      ) & 0x3  ) * as;
             }
          }
          break;
       case GL_UNSIGNED_INT_2_10_10_10_REV:
+         if (!intFormat) {
+            rs = 1.0F / 1023.0F;
+            gs = 1.0F / 1023.0F;
+            bs = 1.0F / 1023.0F;
+            as = 1.0F / 3.0F;
+         }
          if (swapBytes) {
             const GLuint *uisrc = (const GLuint *) src;
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLuint p = uisrc[i];
                SWAP4BYTE(p);
-               rgba[i][rComp] = ((p      ) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][aComp] = ((p >> 30)        ) * (1.0F /    3.0F);
+               rgba[i][rComp] = ((p      ) & 0x3ff) * rs;
+               rgba[i][gComp] = ((p >> 10) & 0x3ff) * gs;
+               rgba[i][bComp] = ((p >> 20) & 0x3ff) * bs;
+               rgba[i][aComp] = ((p >> 30)        ) * as;
             }
          }
          else {
@@ -3766,10 +3947,10 @@ extract_float_rgba(GLuint n, GLfloat rgba[][4],
             GLuint i;
             for (i = 0; i < n; i ++) {
                GLuint p = uisrc[i];
-               rgba[i][rComp] = ((p      ) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
-               rgba[i][aComp] = ((p >> 30)        ) * (1.0F /    3.0F);
+               rgba[i][rComp] = ((p      ) & 0x3ff) * rs;
+               rgba[i][gComp] = ((p >> 10) & 0x3ff) * gs;
+               rgba[i][bComp] = ((p >> 20) & 0x3ff) * bs;
+               rgba[i][aComp] = ((p >> 30)        ) * as;
             }
          }
          break;
@@ -4161,6 +4342,16 @@ _mesa_unpack_color_span_float( GLcontext *ctx,
           srcFormat == GL_RGBA ||
           srcFormat == GL_BGRA ||
           srcFormat == GL_ABGR_EXT ||
+          srcFormat == GL_RED_INTEGER_EXT ||
+          srcFormat == GL_GREEN_INTEGER_EXT ||
+          srcFormat == GL_BLUE_INTEGER_EXT ||
+          srcFormat == GL_ALPHA_INTEGER_EXT ||
+          srcFormat == GL_RGB_INTEGER_EXT ||
+          srcFormat == GL_RGBA_INTEGER_EXT ||
+          srcFormat == GL_BGR_INTEGER_EXT ||
+          srcFormat == GL_BGRA_INTEGER_EXT ||
+          srcFormat == GL_LUMINANCE_INTEGER_EXT ||
+          srcFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT ||
           srcFormat == GL_COLOR_INDEX);
 
    ASSERT(srcType == GL_BITMAP ||