1 files changed, 45 insertions, 10 deletions

diff --git a/src/mesa/state_tracker/st_cb_readpixels.c b/src/mesa/state_tracker/st_cb_readpixels.c
index f8da2a4..2a63799 100644
--- a/src/mesa/state_tracker/st_cb_readpixels.c
+++ b/src/mesa/state_tracker/st_cb_readpixels.c
@@ -198,27 +198,39 @@ st_fast_readpixels(struct gl_context *ctx, struct st_renderbuffer *strb,
                    const struct gl_pixelstore_attrib *pack,
                    GLvoid *dest)
 {
+   GLubyte alphaORoperand;
    enum combination {
       A8R8G8B8_UNORM_TO_RGBA_UBYTE,
       A8R8G8B8_UNORM_TO_RGB_UBYTE,
-      A8R8G8B8_UNORM_TO_BGRA_UINT
+      A8R8G8B8_UNORM_TO_BGRA_UINT,
+      A8R8G8B8_UNORM_TO_RGBA_UINT
    } combo;
 
    if (ctx->_ImageTransferState)
       return GL_FALSE;
 
-   if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM &&
-       format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
+   if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM) {
+      alphaORoperand = 0;
+   }
+   else if (strb->format == PIPE_FORMAT_B8G8R8X8_UNORM ) {
+      alphaORoperand = 0xff;
+   }
+   else {
+      return GL_FALSE;
+   }
+
+   if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
       combo = A8R8G8B8_UNORM_TO_RGBA_UBYTE;
    }
-   else if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM &&
-            format == GL_RGB && type == GL_UNSIGNED_BYTE) {
+   else if (format == GL_RGB && type == GL_UNSIGNED_BYTE) {
       combo = A8R8G8B8_UNORM_TO_RGB_UBYTE;
    }
-   else if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM &&
-            format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV) {
+   else if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV) {
       combo = A8R8G8B8_UNORM_TO_BGRA_UINT;
    }
+   else if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8) {
+      combo = A8R8G8B8_UNORM_TO_RGBA_UINT;
+   }
    else {
       return GL_FALSE;
    }
@@ -278,7 +290,7 @@ st_fast_readpixels(struct gl_context *ctx, struct st_renderbuffer *strb,
                dst[col*4+0] = (pixel >> 16) & 0xff;
                dst[col*4+1] = (pixel >>  8) & 0xff;
                dst[col*4+2] = (pixel >>  0) & 0xff;
-               dst[col*4+3] = (pixel >> 24) & 0xff;
+               dst[col*4+3] = ((pixel >> 24) & 0xff) | alphaORoperand;
             }
             dst += dstStride;
             y += dy;
@@ -301,6 +313,26 @@ st_fast_readpixels(struct gl_context *ctx, struct st_renderbuffer *strb,
          for (row = 0; row < height; row++) {
             const GLubyte *src = map + y * trans->stride;
             memcpy(dst, src, 4 * width);
+            if (alphaORoperand) {
+               assert(alphaORoperand == 0xff);
+               for (col = 0; col < width; col++) {
+                  dst[col*4+3] = 0xff;
+               }
+            }
+            dst += dstStride;
+            y += dy;
+         }
+         break;
+      case A8R8G8B8_UNORM_TO_RGBA_UINT:
+         for (row = 0; row < height; row++) {
+            const GLubyte *src = map + y * trans->stride;
+            for (col = 0; col < width; col++) {
+               GLuint pixel = ((GLuint *) src)[col];
+               dst[col*4+0] = ((pixel >> 24) & 0xff) | alphaORoperand;
+               dst[col*4+1] = (pixel >> 0) & 0xff;
+               dst[col*4+2] = (pixel >> 8) & 0xff;
+               dst[col*4+3] = (pixel >> 16) & 0xff;
+            }
             dst += dstStride;
             y += dy;
          }
@@ -331,7 +363,7 @@ st_readpixels(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei h
    struct st_context *st = st_context(ctx);
    struct pipe_context *pipe = st->pipe;
    GLfloat (*temp)[4];
-   const GLbitfield transferOps = ctx->_ImageTransferState;
+   GLbitfield transferOps = ctx->_ImageTransferState;
    GLsizei i, j;
    GLint yStep, dfStride;
    GLfloat *df;
@@ -391,7 +423,10 @@ st_readpixels(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei h
       return;
    }
 
-   if (format == GL_RGBA && type == GL_FLOAT) {
+   if(ctx->Color._ClampReadColor)
+      transferOps |= IMAGE_CLAMP_BIT;
+
+   if (format == GL_RGBA && type == GL_FLOAT && !transferOps) {
       /* write tile(row) directly into user's buffer */
       df = (GLfloat *) _mesa_image_address2d(&clippedPacking, dest, width,
                                              height, format, type, 0, 0);