diff options
Diffstat (limited to 'drivers/gles2/shaders/canvas.glsl')
| -rw-r--r-- | drivers/gles2/shaders/canvas.glsl | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gles2/shaders/canvas.glsl b/drivers/gles2/shaders/canvas.glsl index a63c7675d8..29d81bb2c4 100644 --- a/drivers/gles2/shaders/canvas.glsl +++ b/drivers/gles2/shaders/canvas.glsl @@ -20,6 +20,13 @@ varying vec4 color_interp; uniform highp vec2 color_texpixel_size; +#ifdef USE_TEXTURE_RECT + +uniform vec4 dst_rect; +uniform vec4 src_rect; + +#endif + uniform highp float time; VERTEX_SHADER_GLOBALS @@ -37,9 +44,35 @@ void main() { vec4 color = color_attrib; +#ifdef USE_TEXTURE_RECT + + if (dst_rect.z < 0.0) { // Transpose is encoded as negative dst_rect.z + uv_interp = src_rect.xy + abs(src_rect.zw) * vertex.yx; + } else { + uv_interp = src_rect.xy + abs(src_rect.zw) * vertex; + } + + vec4 outvec = vec4(0.0, 0.0, 0.0, 1.0); + + // This is what is done in the GLES 3 bindings and should + // take care of flipped rects. + // + // But it doesn't. + // I don't know why, will need to investigate further. + + outvec.xy = dst_rect.xy + abs(dst_rect.zw) * select(vertex, vec2(1.0, 1.0) - vertex, lessThan(src_rect.zw, vec2(0.0, 0.0))); + + // outvec.xy = dst_rect.xy + abs(dst_rect.zw) * vertex; +#else vec4 outvec = vec4(vertex.xy, 0.0, 1.0); +#ifdef USE_UV_ATTRIBUTE uv_interp = uv_attrib; +#else + uv_interp = vertex.xy; +#endif + +#endif { vec2 src_vtx=outvec.xy; |