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#if defined(GLES2_RENDERER) ///////////////////////////////////////////
precision highp float;
#define LAYOUT_LOCATION(N) attribute
#define IN
#define FLAT
#define OUT varying
#define INT float
#define IS_RIGHT_SIDE (int(sides) == 1 || int(sides) == 3)
#define IS_BOTTOM_SIDE (int(sides) == 2 || int(sides) == 3)
#else // GLSL3_RENDERER ///////////////////////////////////////////////
#define LAYOUT_LOCATION(N) layout(location = N)
#define IN in
#define FLAT flat
#define OUT out
#define INT int
#define IS_RIGHT_SIDE ((sides & 1) == 1)
#define IS_BOTTOM_SIDE ((sides & 2) == 2)
#endif ////////////////////////////////////////////////////////////////
// ------
// INPUTS
// Texture associated to the graphic.
LAYOUT_LOCATION(0) IN INT textureId;
// Sides where the vertex is located.
//
// Bit 0 (LSB) is 0 for top and 1 for bottom.
// Bit 1 is 0 for left and 1 for right.
LAYOUT_LOCATION(1) IN INT sides;
// Column number in the grid where the left vertex is set.
LAYOUT_LOCATION(2) IN float column;
// Line number in the grid where the left vertex is set.
LAYOUT_LOCATION(3) IN float line;
// Height in pixels of the texture.
LAYOUT_LOCATION(4) IN float height;
// Width in pixels of the texture.
LAYOUT_LOCATION(5) IN float width;
// Offset in the X direction.
LAYOUT_LOCATION(6) IN float offsetX;
// Offset in the Y direction.
LAYOUT_LOCATION(7) IN float offsetY;
// Height in pixels of a single cell when the graphic was added.
LAYOUT_LOCATION(8) IN float baseCellHeight;
// -------
// OUTPUTS
// Texture sent to the fragment shader.
FLAT OUT INT texId;
// Coordinates sent to the fragment shader.
OUT vec2 texCoords;
// --------
// UNIFORMS
// Width and height of a single cell.
uniform vec2 cellDimensions;
// Width and height of the view.
uniform vec2 viewDimensions;
void main() {
float scale = cellDimensions.y / baseCellHeight;
float x = (column * cellDimensions.x - offsetX * scale) / (viewDimensions.x / 2.) - 1.;
float y = -(line * cellDimensions.y - offsetY * scale) / (viewDimensions.y / 2.) + 1.;
vec4 position = vec4(x, y, 0., 1.);
vec2 coords = vec2(0., 0.);
if(IS_RIGHT_SIDE) {
position.x += scale * width / (viewDimensions.x / 2.);
coords.x = 1.;
}
if(IS_BOTTOM_SIDE) {
position.y += -scale * height / (viewDimensions.y / 2.);
coords.y = 1.;
}
gl_Position = position;
texCoords = coords;
texId = textureId;
}
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