WIP: SDL/OpenGL renderer. Make mvedecode use renderer for playback.

shaders/overlay.fs

@@ -0,0 +1,12 @@
+#version 330 core
+#extension GL_ARB_explicit_uniform_location : enable
+
+layout(location = 1) uniform sampler2D texBase;
+
+in vec2 fragTC;
+
+out vec4 color;
+
+void main(void) {
+     color = texture(texBase, fragTC);
+}

shaders/overlay.vs

@@ -0,0 +1,16 @@
+#version 330 core
+#extension GL_ARB_shading_language_420pack : enable
+#extension GL_ARB_explicit_uniform_location : enable
+
+layout(location = 0) uniform mat4 projection_matrix;
+
+layout(location = 0) in vec2 vertex;
+layout(location = 1) in vec2 vertexTC;
+
+out vec2 fragTC;
+
+void main(void) {
+     vec4 pos = projection_matrix * vec4(vertex, 0.0, 1.0);
+     gl_Position = pos;
+     fragTC = vertexTC;
+}