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authormarha <marha@users.sourceforge.net>2011-10-05 17:37:34 +0200
committermarha <marha@users.sourceforge.net>2011-10-05 17:37:34 +0200
commitf7025b4baa1ba35ee796785641f04eac5bedb0a6 (patch)
tree3df62b7b501a478e212397883657a8a8be4db7a3 /mesalib/src/mesa/drivers/common/meta.c
parent60adbfdea1ee754341d64454274e7aa83bae8971 (diff)
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mkfontscale pixman xserver xtrans libX11 libXdmcp libxcb libXmu mesa git update 5 oct 2011
Diffstat (limited to 'mesalib/src/mesa/drivers/common/meta.c')
-rw-r--r--mesalib/src/mesa/drivers/common/meta.c31
1 files changed, 25 insertions, 6 deletions
diff --git a/mesalib/src/mesa/drivers/common/meta.c b/mesalib/src/mesa/drivers/common/meta.c
index b6e80d70a..4d645e200 100644
--- a/mesalib/src/mesa/drivers/common/meta.c
+++ b/mesalib/src/mesa/drivers/common/meta.c
@@ -49,6 +49,7 @@
#include "main/macros.h"
#include "main/matrix.h"
#include "main/mipmap.h"
+#include "main/pixel.h"
#include "main/pbo.h"
#include "main/polygon.h"
#include "main/readpix.h"
@@ -3235,8 +3236,27 @@ decompress_texture_image(struct gl_context *ctx,
}
/* read pixels from renderbuffer */
- ctx->Pack.RowLength = destRowLength;
- _mesa_ReadPixels(0, 0, width, height, destFormat, destType, dest);
+ {
+ GLenum baseTexFormat = texImage->_BaseFormat;
+
+ /* The pixel transfer state will be set to default values at this point
+ * (see MESA_META_PIXEL_TRANSFER) so pixel transfer ops are effectively
+ * turned off (as required by glGetTexImage) but we need to handle some
+ * special cases. In particular, single-channel texture values are
+ * returned as red and two-channel texture values are returned as
+ * red/alpha.
+ */
+ if (baseTexFormat == GL_LUMINANCE ||
+ baseTexFormat == GL_LUMINANCE_ALPHA ||
+ baseTexFormat == GL_INTENSITY) {
+ /* Green and blue must be zero */
+ _mesa_PixelTransferf(GL_GREEN_SCALE, 0.0f);
+ _mesa_PixelTransferf(GL_BLUE_SCALE, 0.0f);
+ }
+
+ ctx->Pack.RowLength = destRowLength;
+ _mesa_ReadPixels(0, 0, width, height, destFormat, destType, dest);
+ }
/* disable texture unit */
_mesa_set_enable(ctx, target, GL_FALSE);
@@ -3260,9 +3280,8 @@ decompress_texture_image(struct gl_context *ctx,
* from core Mesa.
*/
void
-_mesa_meta_GetTexImage(struct gl_context *ctx, GLenum target, GLint level,
+_mesa_meta_GetTexImage(struct gl_context *ctx,
GLenum format, GLenum type, GLvoid *pixels,
- struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
/* We can only use the decompress-with-blit method here if the texels are
@@ -3272,6 +3291,7 @@ _mesa_meta_GetTexImage(struct gl_context *ctx, GLenum target, GLint level,
if (_mesa_is_format_compressed(texImage->TexFormat) &&
_mesa_get_format_datatype(texImage->TexFormat)
== GL_UNSIGNED_NORMALIZED) {
+ struct gl_texture_object *texObj = texImage->TexObject;
const GLuint slice = 0; /* only 2D compressed textures for now */
/* Need to unlock the texture here to prevent deadlock... */
_mesa_unlock_texture(ctx, texObj);
@@ -3281,7 +3301,6 @@ _mesa_meta_GetTexImage(struct gl_context *ctx, GLenum target, GLint level,
_mesa_lock_texture(ctx, texObj);
}
else {
- _mesa_get_teximage(ctx, target, level, format, type, pixels,
- texObj, texImage);
+ _mesa_get_teximage(ctx, format, type, pixels, texImage);
}
}