gl01/internal/igwrap/backend/shader.vert

#version 330

#define FLAG_RED    (1<<0)
#define FLAG_GREEN  (1<<1)
#define FLAG_BLUE   (1<<2)
#define FLAG_ALPHA  (1<<3)
#define FLAG_COLORS (FLAG_RED | FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA)

#define FLAG_LINEAR     (1<<4)
#define FLAG_IMGUI_FONT (1<<5)
#define FLAG_FLIP_Y     (1<<6)

uniform mat4 projection;
uniform int flags;

in vec2 pos;
in vec2 uv;
in vec4 color;

out vec2 fragUV;
out vec4 fragColor;

void main() {
	fragUV = uv;
	fragColor = color;
    gl_Position = projection * vec4(pos.xy, 0, 1);

	if ((flags & FLAG_FLIP_Y) != 0)
		fragUV.y = 1 - fragUV.y;
}