scummvm/engines/grim/shaders/grim_emerg.vertex
2020-10-07 00:37:20 +02:00

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in vec2 position;
in vec2 texcoord;
uniform vec2 sizeWH;
uniform vec2 offsetXY;
uniform vec2 texOffsetXY;
uniform vec2 texScale;
out vec2 Texcoord;
void main()
{
vec2 tex = texcoord;
tex.y = 1.0 - tex.y;
tex *= texScale;
Texcoord = texOffsetXY + tex;
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);
}