render: split module into gfx_apis and renderer

src/gfx_apis/gl/shaders/fill.frag.glsl

@@ -0,0 +1,6 @@
+precision mediump float;
+uniform vec4 color;
+
+void main() {
+	gl_FragColor = color;
+}

src/gfx_apis/gl/shaders/fill.vert.glsl

@@ -0,0 +1,5 @@
+attribute vec2 pos;
+
+void main() {
+	gl_Position = vec4(pos, 0.0, 1.0);
+}

src/gfx_apis/gl/shaders/tex-alpha.frag.glsl

@@ -0,0 +1,7 @@
+precision mediump float;
+varying vec2 v_texcoord;
+uniform sampler2D tex;
+
+void main() {
+	gl_FragColor = texture2D(tex, v_texcoord);
+}

src/gfx_apis/gl/shaders/tex-external-alpha.frag.glsl

@@ -0,0 +1,9 @@
+#extension GL_OES_EGL_image_external : require
+
+precision mediump float;
+varying vec2 v_texcoord;
+uniform samplerExternalOES tex;
+
+void main() {
+	gl_FragColor = texture2D(tex, v_texcoord);
+}

src/gfx_apis/gl/shaders/tex-external.frag.glsl

@@ -0,0 +1,9 @@
+#extension GL_OES_EGL_image_external : require
+
+precision mediump float;
+varying vec2 v_texcoord;
+uniform samplerExternalOES tex;
+
+void main() {
+	gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0);
+}

src/gfx_apis/gl/shaders/tex.frag.glsl

@@ -0,0 +1,7 @@
+precision mediump float;
+varying vec2 v_texcoord;
+uniform sampler2D tex;
+
+void main() {
+	gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0);
+}

src/gfx_apis/gl/shaders/tex.vert.glsl

@@ -0,0 +1,8 @@
+attribute vec2 pos;
+attribute vec2 texcoord;
+varying vec2 v_texcoord;
+
+void main() {
+	gl_Position = vec4(pos, 0.0, 1.0);
+	v_texcoord = texcoord;
+}