yocto-poky/meta/recipes-graphics/cairo/cairo/Manually-transpose-the-matrix-in-_cairo_gl_shader_bi.patch

Upstream-Status: Backport

  http://lists.cairographics.org/archives/cairo/2015-May/026253.html
  http://cgit.freedesktop.org/cairo/commit/?id=f52f0e2feb1ad0a4de23c475a8c020d41a1764a8

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>


From f52f0e2feb1ad0a4de23c475a8c020d41a1764a8 Mon Sep 17 00:00:00 2001
From: Zan Dobersek <zdobersek@igalia.com>
Date: Fri, 8 May 2015 01:50:25 -0700
Subject: [PATCH] Manually transpose the matrix in _cairo_gl_shader_bind_matrix()

To maintain compatibility with OpenGL ES 2.0, the matrix in
_cairo_gl_shader_bind_matrix() should be manually transposed,
and GL_FALSE passed as the transpose argument to the
glUniformMatrix3fv() call as it is the only valid value for
that parameter in OpenGL ES 2.0.

Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Acked-by: "Henry (Yu) Song" <henry.song@samsung.com>
---
 src/cairo-gl-shaders.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/cairo-gl-shaders.c b/src/cairo-gl-shaders.c
index 2710606..fe975d2 100644
--- a/src/cairo-gl-shaders.c
+++ b/src/cairo-gl-shaders.c
@@ -973,12 +973,12 @@ _cairo_gl_shader_bind_matrix (cairo_gl_context_t *ctx,
 {
     cairo_gl_dispatch_t *dispatch = &ctx->dispatch;
     float gl_m[9] = {
-	m->xx, m->xy, m->x0,
-	m->yx, m->yy, m->y0,
-	0,     0,     1
+	m->xx, m->yx, 0,
+	m->xy, m->yy, 0,
+	m->x0, m->y0, 1
     };
     assert (location != -1);
-    dispatch->UniformMatrix3fv (location, 1, GL_TRUE, gl_m);
+    dispatch->UniformMatrix3fv (location, 1, GL_FALSE, gl_m);
 }
 
 void
-- 
1.9.1