cairo: backport fix for compatibility with OpenGL ES 2.0
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. http://lists.cairographics.org/archives/cairo/2015-May/026253.html http://cgit.freedesktop.org/cairo/commit/?id=f52f0e2feb1ad0a4de23c475a8c020d41a1764a8 (From OE-Core rev: 18358a04930722ffec856cab359ed32f061ba555) Signed-off-by: Andre McCurdy <armccurdy@gmail.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Upstream-Status: Backport
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http://lists.cairographics.org/archives/cairo/2015-May/026253.html
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http://cgit.freedesktop.org/cairo/commit/?id=f52f0e2feb1ad0a4de23c475a8c020d41a1764a8
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Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
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From f52f0e2feb1ad0a4de23c475a8c020d41a1764a8 Mon Sep 17 00:00:00 2001
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From: Zan Dobersek <zdobersek@igalia.com>
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Date: Fri, 8 May 2015 01:50:25 -0700
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Subject: [PATCH] Manually transpose the matrix in _cairo_gl_shader_bind_matrix()
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To maintain compatibility with OpenGL ES 2.0, the matrix in
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_cairo_gl_shader_bind_matrix() should be manually transposed,
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and GL_FALSE passed as the transpose argument to the
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glUniformMatrix3fv() call as it is the only valid value for
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that parameter in OpenGL ES 2.0.
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Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
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Acked-by: "Henry (Yu) Song" <henry.song@samsung.com>
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---
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src/cairo-gl-shaders.c | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/src/cairo-gl-shaders.c b/src/cairo-gl-shaders.c
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index 2710606..fe975d2 100644
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--- a/src/cairo-gl-shaders.c
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+++ b/src/cairo-gl-shaders.c
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@@ -973,12 +973,12 @@ _cairo_gl_shader_bind_matrix (cairo_gl_context_t *ctx,
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{
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cairo_gl_dispatch_t *dispatch = &ctx->dispatch;
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float gl_m[9] = {
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- m->xx, m->xy, m->x0,
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- m->yx, m->yy, m->y0,
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- 0, 0, 1
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+ m->xx, m->yx, 0,
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+ m->xy, m->yy, 0,
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+ m->x0, m->y0, 1
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};
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assert (location != -1);
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- dispatch->UniformMatrix3fv (location, 1, GL_TRUE, gl_m);
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+ dispatch->UniformMatrix3fv (location, 1, GL_FALSE, gl_m);
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}
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void
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--
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1.9.1
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@ -3,6 +3,7 @@ require cairo.inc
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LIC_FILES_CHKSUM = "file://COPYING;md5=e73e999e0c72b5ac9012424fa157ad77"
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SRC_URI = "http://cairographics.org/releases/cairo-${PV}.tar.xz"
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SRC_URI += "file://Manually-transpose-the-matrix-in-_cairo_gl_shader_bi.patch"
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SRC_URI[md5sum] = "e1cdfaf1c6c995c4d4c54e07215b0118"
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SRC_URI[sha256sum] = "c919d999ddb1bbbecd4bbe65299ca2abd2079c7e13d224577895afa7005ecceb"
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