glamor_es2_pixmap_read_prepare: Just prepare the required region.

Don't need to prepare the whole source pixmap.

Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>

4 files changed, 19 insertions, 18 deletions

diff --git a/glamor/glamor_getimage.c b/glamor/glamor_getimage.c
index 3aabaa5d3..15ee89dcf 100644
--- a/glamor/glamor_getimage.c
+++ b/glamor/glamor_getimage.c
@@ -81,20 +81,25 @@ _glamor_get_image(DrawablePtr drawable, int x, int y, int w, int h,
 	glamor_set_destination_pixmap_priv_nc(pixmap_priv);
 	glamor_validate_pixmap(pixmap);
 
+	x += drawable->x + x_off;
+	y += drawable->y + y_off;
+
 	if (glamor_priv->gl_flavor == GLAMOR_GL_ES2
 	    && ( swap_rb != SWAP_NONE_DOWNLOADING
 		 || revert != REVERT_NONE)) {
-		/* XXX prepare whole pixmap is not efficient. */
 		temp_fbo =
-		    glamor_es2_pixmap_read_prepare(pixmap, tex_format,
+		    glamor_es2_pixmap_read_prepare(pixmap, x, y, w, h, tex_format,
 						   tex_type, no_alpha,
 						   revert, swap_rb);
-		if (temp_fbo == NULL)
+		if (temp_fbo == NULL) {
+			x -= (drawable->x + x_off);
+			y -= (drawable->y + y_off);
 			goto fall_back;
-
+		}
+		x = 0;
+		y = 0;
 	}
 
-
 	dispatch = glamor_get_dispatch(glamor_priv);
 	if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP) {
 		int row_length = PixmapBytePad(w, drawable->depth);
@@ -105,9 +110,6 @@ _glamor_get_image(DrawablePtr drawable, int x, int y, int w, int h,
 		dispatch->glPixelStorei(GL_PACK_ALIGNMENT, 4);
 	}
 
-	x += drawable->x + x_off;
-	y += drawable->y + y_off;
-
 	if (glamor_priv->yInverted)
 		dispatch->glReadPixels(x,
 				       y,
@@ -124,7 +126,6 @@ _glamor_get_image(DrawablePtr drawable, int x, int y, int w, int h,
 	glamor_put_dispatch(glamor_priv);
 	if (temp_fbo)
 		glamor_destroy_fbo(temp_fbo);
-
 	ret = TRUE;
 
 fall_back:
diff --git a/glamor/glamor_getspans.c b/glamor/glamor_getspans.c
index 8341df42e..bd6a5ec19 100644
--- a/glamor/glamor_getspans.c
+++ b/glamor/glamor_getspans.c
@@ -73,7 +73,7 @@ _glamor_get_spans(DrawablePtr drawable,
 
 		/* XXX prepare whole pixmap is not efficient. */
 		temp_fbo =
-		    glamor_es2_pixmap_read_prepare(pixmap, format,
+		    glamor_es2_pixmap_read_prepare(pixmap, 0, 0, pixmap->drawable.width, pixmap->drawable.height, format,
 						   type, no_alpha,
 						   revert, swap_rb);
 		if (temp_fbo == NULL)
diff --git a/glamor/glamor_pixmap.c b/glamor/glamor_pixmap.c
index de8774035..bab91af84 100644
--- a/glamor/glamor_pixmap.c
+++ b/glamor/glamor_pixmap.c
@@ -788,7 +788,7 @@ glamor_restore_pixmap_to_texture(PixmapPtr pixmap)
  * */
 
 glamor_pixmap_fbo *
-glamor_es2_pixmap_read_prepare(PixmapPtr source, GLenum format,
+glamor_es2_pixmap_read_prepare(PixmapPtr source, int x, int y, int w, int h, GLenum format,
 			       GLenum type, int no_alpha, int revert, int swap_rb)
 
 {
@@ -806,8 +806,7 @@ glamor_es2_pixmap_read_prepare(PixmapPtr source, GLenum format,
 	glamor_priv = glamor_get_screen_private(screen);
 	source_priv = glamor_get_pixmap_private(source);
 	temp_fbo = glamor_create_fbo(glamor_priv,
-				     source->drawable.width,
-				     source->drawable.height,
+				     w, h,
 				     format,
 				     0);
 	if (temp_fbo == NULL)
@@ -820,7 +819,7 @@ glamor_es2_pixmap_read_prepare(PixmapPtr source, GLenum format,
 	glamor_set_normalize_vcoords(temp_xscale,
 				     temp_yscale,
 				     0, 0,
-				     source->drawable.width, source->drawable.height,
+				     w, h,
 				     glamor_priv->yInverted,
 				     vertices);
 
@@ -832,8 +831,8 @@ glamor_es2_pixmap_read_prepare(PixmapPtr source, GLenum format,
 	pixmap_priv_get_scale(source_priv, &source_xscale, &source_yscale);
 	glamor_set_normalize_tcoords(source_xscale,
 				     source_yscale,
-				     0, 0,
-				     source->drawable.width, source->drawable.height,
+				     x, y,
+				     x + w, y + h,
 				     glamor_priv->yInverted,
 				     texcoords);
 
@@ -928,7 +927,8 @@ glamor_download_pixmap_to_cpu(PixmapPtr pixmap, glamor_access_t access)
 	if (glamor_priv->gl_flavor == GLAMOR_GL_ES2
 	    && !need_post_conversion
 	    && (swap_rb != SWAP_NONE_DOWNLOADING || revert != REVERT_NONE)) {
-		 if (!(temp_fbo = glamor_es2_pixmap_read_prepare(pixmap, format,
+		 if (!(temp_fbo = glamor_es2_pixmap_read_prepare(pixmap, 0, 0,
+								 pixmap->drawable.width, pixmap->drawable.height, format,
 								 type, no_alpha,
 								 revert, swap_rb)))
 			return FALSE;
diff --git a/glamor/glamor_priv.h b/glamor/glamor_priv.h
index bea4f662a..3e13ef8e2 100644
--- a/glamor/glamor_priv.h
+++ b/glamor/glamor_priv.h
@@ -465,7 +465,7 @@ void glamor_set_destination_pixmap_priv_nc(glamor_pixmap_private *
 					   pixmap_priv);
 
 glamor_pixmap_fbo *
-glamor_es2_pixmap_read_prepare(PixmapPtr source, GLenum format,
+glamor_es2_pixmap_read_prepare(PixmapPtr source, int x, int y, int w, int h, GLenum format,
 			       GLenum type, int no_alpha, int revert, int swap_rb);
 
 Bool glamor_set_alu(struct glamor_gl_dispatch *dispatch,