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scummvm-cursorfix/engines/grim/shaders/grim_background.vertex
2026-02-02 04:50:13 +01:00

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in vec2 position;
in vec2 texcoord;
uniform vec2 texcrop;
uniform vec2 offsetXY;
uniform vec2 sizeWH;
out vec2 Texcoord;
void main() {
Texcoord = texcoord * texcrop;
// Coordinates are [0.0;1.0], transform [-1.0; 1.0] and flip Y
vec2 pos = offsetXY + position * sizeWH;
pos.x = pos.x * 2.0 - 1.0;
pos.y = -1.0 * (pos.y * 2.0 - 1.0);
gl_Position = vec4(pos, 0.0, 1.0);
}