Merge pull request #16687 from karroffel/gles2-2d-pr

add GLES 2 renderer for 2D

1 files changed, 49 insertions, 0 deletions

diff --git a/drivers/gles2/shaders/canvas_shadow.glsl b/drivers/gles2/shaders/canvas_shadow.glsl
new file mode 100644
index 000000000..c757990de
--- /dev/null
+++ b/drivers/gles2/shaders/canvas_shadow.glsl
@@ -0,0 +1,49 @@
+[vertex]
+
+
+
+uniform highp mat4 projection_matrix;
+uniform highp mat4 light_matrix;
+uniform highp mat4 world_matrix;
+uniform highp float distance_norm;
+
+layout(location=0) in highp vec3 vertex;
+
+out highp vec4 position_interp;
+
+void main() {
+
+	gl_Position = projection_matrix * (light_matrix * (world_matrix *  vec4(vertex,1.0)));
+	position_interp=gl_Position;
+}
+
+[fragment]
+
+in highp vec4 position_interp;
+
+#ifdef USE_RGBA_SHADOWS
+
+layout(location=0) out lowp vec4 distance_buf;
+
+#else
+
+layout(location=0) out highp float distance_buf;
+
+#endif
+
+void main() {
+
+	highp float depth = ((position_interp.z / position_interp.w) + 1.0) * 0.5 + 0.0;//bias;
+
+#ifdef USE_RGBA_SHADOWS
+
+	highp vec4 comp = fract(depth * vec4(256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0));
+	comp -= comp.xxyz * vec4(0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
+	distance_buf=comp;
+#else
+
+	distance_buf=depth;
+
+#endif
+}
+