36 lines
919 B
GLSL
36 lines
919 B
GLSL
// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#version 450
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#ifdef VULKAN
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#define VERTEX_ID gl_VertexIndex
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#define BEGIN_PUSH_CONSTANTS layout(push_constant) uniform PushConstants {
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#define END_PUSH_CONSTANTS };
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#define UNIFORM(n)
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#define FLIPY 1
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#else // ^^^ Vulkan ^^^ // vvv OpenGL vvv
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#define VERTEX_ID gl_VertexID
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#define BEGIN_PUSH_CONSTANTS
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#define END_PUSH_CONSTANTS
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#define FLIPY -1
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#define UNIFORM(n) layout (location = n) uniform
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out gl_PerVertex {
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vec4 gl_Position;
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};
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#endif
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BEGIN_PUSH_CONSTANTS
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UNIFORM(0) vec2 tex_scale;
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UNIFORM(1) vec2 tex_offset;
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END_PUSH_CONSTANTS
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layout(location = 0) out vec2 texcoord;
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void main() {
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float x = float((VERTEX_ID & 1) << 2);
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float y = float((VERTEX_ID & 2) << 1);
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gl_Position = vec4(x - 1.0, FLIPY * (y - 1.0), 0.0, 1.0);
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texcoord = fma(vec2(x, y) / 2.0, tex_scale, tex_offset);
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}
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