Add GskGLShaderNode and GskGLShader

A GskGLShader is an abstraction of a GLSL fragment shader that
can produce pixel values given inputs:
 * N (currently max 4) textures
 * Current arguments for the shader uniform
Uniform types are: float,(u)int,bool,vec234)
There is also a builder for the uniform arguments which are
passed around as immutable GBytes in the built form.

A GskGLShaderNode is a render node that renders a GskGLShader inside a
specified rectangular bounds. It renders its child nodes as textures
and passes those as texture arguments to the shader. You also pass it
a uniform arguments object.

1 files changed, 19 insertions, 0 deletions

diff --git a/gsk/gskglshaderprivate.h b/gsk/gskglshaderprivate.h
new file mode 100644
index 0000000000..3dc82c35dc
--- /dev/null
+++ b/gsk/gskglshaderprivate.h
@@ -0,0 +1,19 @@
+#ifndef __GSK_GLSHADER_PRIVATE_H__
+#define __GSK_GLSHADER_PRIVATE_H__
+
+#include <gsk/gskglshader.h>
+
+G_BEGIN_DECLS
+
+typedef struct {
+  char *name;
+  GskGLUniformType type;
+  gsize offset;
+} GskGLUniform;
+
+const GskGLUniform *gsk_gl_shader_get_uniforms (GskGLShader *shader,
+                                                int         *n_uniforms);
+
+G_END_DECLS
+
+#endif /* __GSK_GLSHADER_PRIVATE_H__ */