pcsx2/plugins/GSdx/res/glsl/tfx_vgs.glsl

181 lines
3.7 KiB
GLSL

//#version 420 // Keep it for text editor detection
#ifdef VERTEX_SHADER
layout(location = 0) in vec2 i_st;
layout(location = 2) in vec4 i_c;
layout(location = 3) in float i_q;
layout(location = 4) in uvec2 i_p;
layout(location = 5) in uint i_z;
layout(location = 6) in uvec2 i_uv;
layout(location = 7) in vec4 i_f;
out SHADER
{
vec4 t_float;
vec4 t_int;
vec4 c;
flat vec4 fc;
} VSout;
const float exp_min32 = exp2(-32.0f);
void texture_coord()
{
vec2 uv = (VS_WILDHACK == 1) ? vec2(i_uv & uvec2(0x3FEF, 0x3FEF)) : vec2(i_uv);
// Float coordinate
VSout.t_float.xy = i_st;
VSout.t_float.w = i_q;
// Integer coordinate => normalized
VSout.t_int.xy = uv * TextureScale;
// Integer coordinate => integral
VSout.t_int.zw = uv;
}
void vs_main()
{
highp uint z;
if(VS_BPPZ == 1) // 24
z = i_z & uint(0xffffff);
else if(VS_BPPZ == 2) // 16
z = i_z & uint(0xffff);
else
z = i_z;
// pos -= 0.05 (1/320 pixel) helps avoiding rounding problems (integral part of pos is usually 5 digits, 0.05 is about as low as we can go)
// example: ceil(afterseveralvertextransformations(y = 133)) => 134 => line 133 stays empty
// input granularity is 1/16 pixel, anything smaller than that won't step drawing up/left by one pixel
// example: 133.0625 (133 + 1/16) should start from line 134, ceil(133.0625 - 0.05) still above 133
vec4 p;
p.xy = vec2(i_p) - vec2(0.05f, 0.05f);
p.xy = p.xy * VertexScale - VertexOffset;
p.w = 1.0f;
p.z = float(z) * exp_min32;
gl_Position = p;
texture_coord();
VSout.c = i_c;
VSout.fc = i_c;
VSout.t_float.z = i_f.x; // pack for with texture
}
#endif
#ifdef GEOMETRY_SHADER
in SHADER
{
vec4 t_float;
vec4 t_int;
vec4 c;
flat vec4 fc;
} GSin[];
out SHADER
{
vec4 t_float;
vec4 t_int;
vec4 c;
flat vec4 fc;
} GSout;
struct vertex
{
vec4 t_float;
vec4 t_int;
vec4 c;
};
void out_vertex(in vertex v)
{
GSout.t_float = v.t_float;
GSout.t_int = v.t_int;
GSout.c = v.c;
// Flat output
#if GS_POINT == 1
GSout.fc = GSin[0].fc;
#else
GSout.fc = GSin[1].fc;
#endif
gl_PrimitiveID = gl_PrimitiveIDIn;
EmitVertex();
}
#if GS_POINT == 1
layout(points) in;
#else
layout(lines) in;
#endif
layout(triangle_strip, max_vertices = 6) out;
void gs_main()
{
// left top => GSin[0];
// right bottom => GSin[1];
#if GS_POINT == 1
vertex rb = vertex(GSin[0].t_float, GSin[0].t_int, GSin[0].c);
#else
vertex rb = vertex(GSin[1].t_float, GSin[1].t_int, GSin[1].c);
#endif
vertex lt = vertex(GSin[0].t_float, GSin[0].t_int, GSin[0].c);
#if GS_POINT == 1
vec4 rb_p = gl_in[0].gl_Position + vec4(PointSize.x, PointSize.y, 0.0f, 0.0f);
#else
vec4 rb_p = gl_in[1].gl_Position;
#endif
vec4 lb_p = rb_p;
vec4 rt_p = rb_p;
vec4 lt_p = gl_in[0].gl_Position;
#if GS_POINT == 0
// flat depth
lt_p.z = rb_p.z;
// flat fog and texture perspective
lt.t_float.zw = rb.t_float.zw;
// flat color
lt.c = rb.c;
#endif
// Swap texture and position coordinate
vertex lb = rb;
lb.t_float.x = lt.t_float.x;
lb.t_int.x = lt.t_int.x;
lb.t_int.z = lt.t_int.z;
lb_p.x = lt_p.x;
vertex rt = rb;
rt_p.y = lt_p.y;
rt.t_float.y = lt.t_float.y;
rt.t_int.y = lt.t_int.y;
rt.t_int.w = lt.t_int.w;
// Triangle 1
gl_Position = lt_p;
out_vertex(lt);
gl_Position = lb_p;
out_vertex(lb);
gl_Position = rt_p;
out_vertex(rt);
EndPrimitive();
// Triangle 2
gl_Position = lb_p;
out_vertex(lb);
gl_Position = rt_p;
out_vertex(rt);
gl_Position = rb_p;
out_vertex(rb);
EndPrimitive();
}
#endif